https://downloads.apache.org/hbase/3.0.0-alpha-4/CHANGES.md

安全更新

# HBASE Changelog

## Release 3.0.0-alpha-4 - Unreleased (as of 2023-05-27)



### NEW FEATURES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26666](https://issues.apache.org/jira/browse/HBASE-26666) | Add native TLS encryption support to RPC server/client | Major | encryption, security |
| [HBASE-27264](https://issues.apache.org/jira/browse/HBASE-27264) | Add options to consider compressed size when delimiting blocks during hfile writes | Major | . |
| [HBASE-27129](https://issues.apache.org/jira/browse/HBASE-27129) | Add a config that allows us to configure region-level storage policies | Major | regionserver |
| [HBASE-27104](https://issues.apache.org/jira/browse/HBASE-27104) | Add a tool command list\_unknownservers | Major | master |
| [HBASE-20904](https://issues.apache.org/jira/browse/HBASE-20904) | Prometheus metrics http endpoint for monitoring integration | Major | metrics, monitoring |
| [HBASE-27304](https://issues.apache.org/jira/browse/HBASE-27304) | Support using IP to expose master/rs servers for some special scenarios | Minor | master, regionserver |
| [HBASE-27314](https://issues.apache.org/jira/browse/HBASE-27314) | Make index block be customized and configured | Major | . |
| [HBASE-26809](https://issues.apache.org/jira/browse/HBASE-26809) | Report client backoff time for server overloaded in ConnectionMetrics | Major | . |
| [HBASE-27444](https://issues.apache.org/jira/browse/HBASE-27444) | Add tool commands list\_enabled\_tables and list\_disabled\_tables | Minor | master |
| [HBASE-27347](https://issues.apache.org/jira/browse/HBASE-27347) | Port FileWatcher from ZK to autodetect keystore/truststore changes in TLS connections | Major | IPC/RPC, security |
| [HBASE-26913](https://issues.apache.org/jira/browse/HBASE-26913) | Replication Observability Framework | Major | regionserver, Replication |
| [HBASE-27110](https://issues.apache.org/jira/browse/HBASE-27110) | Move replication peer storage from zookeeper to other storage systems | Major | Replication |
| [HBASE-27693](https://issues.apache.org/jira/browse/HBASE-27693) | Support for Hadoop's LDAP Authentication mechanism (Web UI only) | Major | . |
| [HBASE-27109](https://issues.apache.org/jira/browse/HBASE-27109) | Move replication queue storage from zookeeper to a separated HBase table | Major | Replication |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-27062](https://issues.apache.org/jira/browse/HBASE-27062) | Remove ThreadPool in HBaseInterClusterReplicationEndpoint when use AsyncClusterConnection | Major | Replication |
| [HBASE-26945](https://issues.apache.org/jira/browse/HBASE-26945) | Quotas causes too much load on meta for large clusters | Minor | . |
| [HBASE-27146](https://issues.apache.org/jira/browse/HBASE-27146) | Avoid CellUtil.cloneRow in MetaCellComparator | Major | meta, Offheaping, Performance |
| [HBASE-27060](https://issues.apache.org/jira/browse/HBASE-27060) | Allow sharing connections between AggregationClient instances | Major | . |
| [HBASE-27025](https://issues.apache.org/jira/browse/HBASE-27025) | Change Hbase book's description for "74.7.3. Load Balancing META table load" | Minor | documentation |
| [HBASE-27158](https://issues.apache.org/jira/browse/HBASE-27158) | Add namespace column family to UNDELETABLE\_META\_COLUMNFAMILIES | Minor | proc-v2 |
| [HBASE-26218](https://issues.apache.org/jira/browse/HBASE-26218) | Better logging in CanaryTool | Minor | canary |
| [HBASE-27101](https://issues.apache.org/jira/browse/HBASE-27101) | support commons-crypto version 1.1.0 | Minor | . |
| [HBASE-18045](https://issues.apache.org/jira/browse/HBASE-18045) | Add ' -o ConnectTimeout=10' to the ssh command we use in ITBLL chaos monkeys | Trivial | integration tests |
| [HBASE-27078](https://issues.apache.org/jira/browse/HBASE-27078) | Allow configuring a separate timeout for meta scans | Major | . |
| [HBASE-27186](https://issues.apache.org/jira/browse/HBASE-27186) | Report block cache size metrics separately for L1 and L2 | Minor | . |
| [HBASE-27188](https://issues.apache.org/jira/browse/HBASE-27188) | Report maxStoreFileCount in jmx | Minor | . |
| [HBASE-27149](https://issues.apache.org/jira/browse/HBASE-27149) | Server should close scanner if client times out before results are ready | Major | . |
| [HBASE-27088](https://issues.apache.org/jira/browse/HBASE-27088) | IntegrationLoadTestCommonCrawl async load improvements | Minor | integration tests, test |
| [HBASE-27048](https://issues.apache.org/jira/browse/HBASE-27048) | Server side scanner time limit should account for time in queue | Major | . |
| [HBASE-27207](https://issues.apache.org/jira/browse/HBASE-27207) | ConnectionUtils.allOf should be moved to FutureUtils | Minor | Client |
| [HBASE-27208](https://issues.apache.org/jira/browse/HBASE-27208) | Use spotless to purge the missing summary warnings from error prone | Major | pom |
| [HBASE-27232](https://issues.apache.org/jira/browse/HBASE-27232) | Fix checking for encoded block size when deciding if block should be closed | Major | . |
| [HBASE-27225](https://issues.apache.org/jira/browse/HBASE-27225) | Add BucketAllocator bucket size statistic logging | Major | . |
| [HBASE-27222](https://issues.apache.org/jira/browse/HBASE-27222) | Purge FutureReturnValueIgnored warnings from error prone | Major | netty |
| [HBASE-27229](https://issues.apache.org/jira/browse/HBASE-27229) | BucketCache statistics should not count evictions by hfile | Major | . |
| [HBASE-27185](https://issues.apache.org/jira/browse/HBASE-27185) | Rewrite NettyRpcServer to decode rpc request with netty handler | Major | netty, rpc |
| [HBASE-27257](https://issues.apache.org/jira/browse/HBASE-27257) | Remove unnecessary usage of CachedBlocksByFile from RS UI | Major | . |
| [HBASE-27153](https://issues.apache.org/jira/browse/HBASE-27153) | Improvements to read-path tracing | Major | Operability, regionserver |
| [HBASE-27144](https://issues.apache.org/jira/browse/HBASE-27144) | Add special rpc handlers for bulkload operations | Minor | regionserver, rpc |
| [HBASE-27273](https://issues.apache.org/jira/browse/HBASE-27273) | Should stop autoRead and skip all the bytes when rpc request too big | Major | IPC/RPC |
| [HBASE-27283](https://issues.apache.org/jira/browse/HBASE-27283) | Use readTO instead of hard coded RpcClient.DEFAULT\_SOCKET\_TIMEOUT\_READ when creating ReadTimeoutHandler in NettyRpcConnection | Major | IPC/RPC, test |
| [HBASE-27241](https://issues.apache.org/jira/browse/HBASE-27241) | Add metrics for evaluating cost and effectiveness of bloom filters | Major | . |
| [HBASE-27278](https://issues.apache.org/jira/browse/HBASE-27278) | Improve TestTlsIPC to reuse existing IPC test code | Major | IPC/RPC, test |
| [HBASE-27296](https://issues.apache.org/jira/browse/HBASE-27296) | Some Cell's implementation of toString() such as IndividualBytesFieldCell prints out value and tags which is too verbose | Minor | logging |
| [HBASE-26982](https://issues.apache.org/jira/browse/HBASE-26982) | Add index and bloom filter statistics of LruBlockCache on rs web UI | Minor | BlockCache, UI |
| [HBASE-27279](https://issues.apache.org/jira/browse/HBASE-27279) | Make SslHandler work with SaslWrapHandler/SaslUnwrapHandler | Major | IPC/RPC, security |
| [HBASE-27295](https://issues.apache.org/jira/browse/HBASE-27295) | Correct the comment of list\_deadservers method in admin.rb | Minor | shell |
| [HBASE-27268](https://issues.apache.org/jira/browse/HBASE-27268) | In trace log mode, the client does not print callId/startTime and the server does not print receiveTime | Minor | logging |
| [HBASE-27089](https://issues.apache.org/jira/browse/HBASE-27089) | Add “commons.crypto.stream.buffer.size” configuration | Minor | io |
| [HBASE-27305](https://issues.apache.org/jira/browse/HBASE-27305) | add an option to skip file splitting when bulkload hfiles | Minor | tooling |
| [HBASE-27303](https://issues.apache.org/jira/browse/HBASE-27303) | Unnecessary replication to secondary region replicas should avoid when WAL.sync throws Exception | Major | read replicas |
| [HBASE-27320](https://issues.apache.org/jira/browse/HBASE-27320) | hide some sensitive configuration information in the UI | Minor | security, UI |
| [HBASE-27338](https://issues.apache.org/jira/browse/HBASE-27338) | brotli compression lib tests fail on arm64 | Minor | . |
| [HBASE-27342](https://issues.apache.org/jira/browse/HBASE-27342) | Use Hadoop Credentials API to retrieve passwords of TLS key/trust stores | Major | IPC/RPC, security |
| [HBASE-27332](https://issues.apache.org/jira/browse/HBASE-27332) | Remove RejectedExecutionHandler for long/short compaction thread pools | Minor | Compaction |
| [HBASE-27340](https://issues.apache.org/jira/browse/HBASE-27340) | Artifacts with resolved profiles | Minor | build, pom |
| [HBASE-27224](https://issues.apache.org/jira/browse/HBASE-27224) | HFile tool statistic sampling produces misleading results | Major | . |
| [HBASE-27346](https://issues.apache.org/jira/browse/HBASE-27346) | Autodetect key/truststore file type from file extension | Major | security |
| [HBASE-27361](https://issues.apache.org/jira/browse/HBASE-27361) | Add .flattened-pom.xml to .gitignore | Major | build |
| [HBASE-27370](https://issues.apache.org/jira/browse/HBASE-27370) | Avoid decompressing blocks when reading from bucket cache prefetch threads | Major | . |
| [HBASE-27280](https://issues.apache.org/jira/browse/HBASE-27280) | Add mutual authentication support to TLS | Major | . |
| [HBASE-27391](https://issues.apache.org/jira/browse/HBASE-27391) | Downgrade ERROR log to DEBUG in ConnectionUtils.updateStats | Major | . |
| [HBASE-27365](https://issues.apache.org/jira/browse/HBASE-27365) | Minimise block addition failures due to no space in bucket cache writers queue by introducing wait time | Major | BucketCache |
| [HBASE-27395](https://issues.apache.org/jira/browse/HBASE-27395) | Adding description to Prometheus metrics | Minor | metrics |
| [HBASE-27339](https://issues.apache.org/jira/browse/HBASE-27339) | Improve sasl connection failure log message to include server | Minor | Client |
| [HBASE-27159](https://issues.apache.org/jira/browse/HBASE-27159) | Emit source metrics for BlockCacheExpressHitPercent | Minor | BlockCache, metrics |
| [HBASE-27406](https://issues.apache.org/jira/browse/HBASE-27406) | Make "/prometheus" endpoint accessible from HBase UI | Minor | UI |
| [HBASE-27363](https://issues.apache.org/jira/browse/HBASE-27363) | Fix the config key name for PREFETCH\_PERSISTENCE\_PATH\_KEY | Trivial | BucketCache |
| [HBASE-27434](https://issues.apache.org/jira/browse/HBASE-27434) | Use $revision as placeholder for maven version to make it easier to control the version from command line | Major | build, pom |
| [HBASE-27438](https://issues.apache.org/jira/browse/HBASE-27438) | Make release scripts can generate CHANGES.md and RELEASENOTES.md for 3.x | Major | community, scripts |
| [HBASE-27091](https://issues.apache.org/jira/browse/HBASE-27091) | Speed up the loading of table descriptor from filesystem | Minor | master |
| [HBASE-27167](https://issues.apache.org/jira/browse/HBASE-27167) | s390x: Skip tests on unsupported compression libs | Major | build, pom |
| [HBASE-27450](https://issues.apache.org/jira/browse/HBASE-27450) | Update all our python scripts to use python3 | Major | scripts |
| [HBASE-27449](https://issues.apache.org/jira/browse/HBASE-27449) | Use xmllint to parse version and revision in release scripts | Major | scripts |
| [HBASE-27448](https://issues.apache.org/jira/browse/HBASE-27448) | Add an admin method to get replication enabled state | Major | Admin, Client |
| [HBASE-27414](https://issues.apache.org/jira/browse/HBASE-27414) | Search order for locations in HFileLink | Minor | Performance |
| [HBASE-27495](https://issues.apache.org/jira/browse/HBASE-27495) | Improve HFileLinkCleaner to validate back reference links ahead the next traverse | Major | master |
| [HBASE-27408](https://issues.apache.org/jira/browse/HBASE-27408) | Improve BucketAllocatorException log to always include HFile name | Major | . |
| [HBASE-27496](https://issues.apache.org/jira/browse/HBASE-27496) | Optionally limit the amount of plans executed in the Normalizer | Minor | Normalizer |
| [HBASE-27506](https://issues.apache.org/jira/browse/HBASE-27506) | Optionally disable sorting directories by size in CleanerChore | Minor | . |
| [HBASE-27503](https://issues.apache.org/jira/browse/HBASE-27503) | Support replace \ in GC\_OPTS for ZGC | Minor | scripts |
| [HBASE-27512](https://issues.apache.org/jira/browse/HBASE-27512) | Add file \`.git-blame-ignore-revs\` for \`git blame\` | Trivial | . |
| [HBASE-27359](https://issues.apache.org/jira/browse/HBASE-27359) | Publish binaries and maven artifacts for both hadoop2 and hadoop3 | Major | build, community, pom, scripts |
| [HBASE-27466](https://issues.apache.org/jira/browse/HBASE-27466) | hbase client metrics per user specified identity on hconnections. | Major | Client |
| [HBASE-22924](https://issues.apache.org/jira/browse/HBASE-22924) | GitHUB PR job should use when clause to filter to just PRs. | Minor | build, community |
| [HBASE-27435](https://issues.apache.org/jira/browse/HBASE-27435) | Make Prometheus metrics queryable | Minor | metrics |
| [HBASE-27459](https://issues.apache.org/jira/browse/HBASE-27459) | Improve our hbase\_docker to be able to build and start standalone clusters other than master branch | Major | scripts |
| [HBASE-27530](https://issues.apache.org/jira/browse/HBASE-27530) | Fix comment syntax errors | Trivial | documentation |
| [HBASE-27253](https://issues.apache.org/jira/browse/HBASE-27253) | Make slow log configs updatable with configuration observer | Major | . |
| [HBASE-27474](https://issues.apache.org/jira/browse/HBASE-27474) | Evict blocks on split/merge; Avoid caching reference/hlinks if compaction is enabled | Major | . |
| [HBASE-27540](https://issues.apache.org/jira/browse/HBASE-27540) | Client metrics for success/failure counts. | Major | Client, metrics |
| [HBASE-27233](https://issues.apache.org/jira/browse/HBASE-27233) | Read blocks into off-heap if caching is disabled for read | Major | . |
| [HBASE-27514](https://issues.apache.org/jira/browse/HBASE-27514) | Move some persistent states from zookeeper to master region | Major | master, Zookeeper |
| [HBASE-27565](https://issues.apache.org/jira/browse/HBASE-27565) | Make the initial corePoolSize configurable for ChoreService | Major | conf |
| [HBASE-27529](https://issues.apache.org/jira/browse/HBASE-27529) | Provide RS coproc ability to attach WAL extended attributes to mutations at replication sink | Major | Coprocessors, Replication |
| [HBASE-27493](https://issues.apache.org/jira/browse/HBASE-27493) | Allow namespace admins to clone snapshots created by them | Major | snapshots |
| [HBASE-27562](https://issues.apache.org/jira/browse/HBASE-27562) | Publish SBOM artifacts | Major | java |
| [HBASE-27539](https://issues.apache.org/jira/browse/HBASE-27539) | Encapsulate and centralise access to ref count through StoreFileInfo | Major | . |
| [HBASE-27541](https://issues.apache.org/jira/browse/HBASE-27541) | Backups should be able to be restored to a separate filesystem | Minor | backup&restore |
| [HBASE-27542](https://issues.apache.org/jira/browse/HBASE-27542) | Remove unneeded distcp log cleanup after incremental backups | Minor | backup&restore |
| [HBASE-27551](https://issues.apache.org/jira/browse/HBASE-27551) | Add config options to delay assignment to retain last region location | Major | . |
| [HBASE-27583](https://issues.apache.org/jira/browse/HBASE-27583) | Remove -X option when building protoc check in nightly and pre commit job | Major | jenkins, scripts |
| [HBASE-27558](https://issues.apache.org/jira/browse/HBASE-27558) | Scan quotas and limits should account for total block IO | Major | . |
| [HBASE-27598](https://issues.apache.org/jira/browse/HBASE-27598) | Upgrade mockito to 4.x | Major | dependencies, test |
| [HBASE-27570](https://issues.apache.org/jira/browse/HBASE-27570) | Unify tracking of block IO across all read request types | Major | . |
| [HBASE-27534](https://issues.apache.org/jira/browse/HBASE-27534) | Determine too large requests by response block size rather than cell size | Major | . |
| [HBASE-27590](https://issues.apache.org/jira/browse/HBASE-27590) | Change Iterable to List in SnapshotFileCache | Minor | . |
| [HBASE-21521](https://issues.apache.org/jira/browse/HBASE-21521) | Expose master startup status via web UI | Major | master, UI |
| [HBASE-15242](https://issues.apache.org/jira/browse/HBASE-15242) | Client metrics for retries and timeouts | Major | metrics |
| [HBASE-27655](https://issues.apache.org/jira/browse/HBASE-27655) | Remove the empty path annotation from ClusterMetricsResource | Trivial | . |
| [HBASE-27666](https://issues.apache.org/jira/browse/HBASE-27666) | Allow preCompact hooks to return scanners whose cells can be shipped | Major | . |
| [HBASE-27458](https://issues.apache.org/jira/browse/HBASE-27458) | Use ReadWriteLock for region scanner readpoint map | Minor | Scanners |
| [HBASE-27670](https://issues.apache.org/jira/browse/HBASE-27670) | Improve FSUtils to directly obtain FSDataOutputStream | Major | Filesystem Integration |
| [HBASE-27672](https://issues.apache.org/jira/browse/HBASE-27672) | Read RPC threads may BLOCKED at the Configuration.get when using java compression | Minor | . |
| [HBASE-27681](https://issues.apache.org/jira/browse/HBASE-27681) | Refactor Table Latency Metrics | Major | . |
| [HBASE-27632](https://issues.apache.org/jira/browse/HBASE-27632) | Refactor WAL.Reader implementation so we can better support WAL splitting and replication | Major | Replication, wal |
| [HBASE-27615](https://issues.apache.org/jira/browse/HBASE-27615) | Add group of regionServer on Master webUI | Major | . |
| [HBASE-27710](https://issues.apache.org/jira/browse/HBASE-27710) | ByteBuff ref counting is too expensive for on-heap buffers | Major | . |
| [HBASE-27646](https://issues.apache.org/jira/browse/HBASE-27646) | Should not use pread when prefetching in HFilePreadReader | Minor | Performance |
| [HBASE-27313](https://issues.apache.org/jira/browse/HBASE-27313) | Persist list of Hfiles names for which prefetch is done | Major | BucketCache |
| [HBASE-27676](https://issues.apache.org/jira/browse/HBASE-27676) | Scan handlers in the RPC executor should match at least one scan queues | Major | . |
| [HBASE-27744](https://issues.apache.org/jira/browse/HBASE-27744) | Update compression dependencies | Minor | io |
| [HBASE-27758](https://issues.apache.org/jira/browse/HBASE-27758) | Inconsistent synchronization in MetricsUserSourceImpl | Major | . |
| [HBASE-27756](https://issues.apache.org/jira/browse/HBASE-27756) | Make request guardrail configs in RSRpcServices live updatable | Major | . |
| [HBASE-27765](https://issues.apache.org/jira/browse/HBASE-27765) | Add biggest cell related info into web ui | Major | HFile, UI |
| [HBASE-27662](https://issues.apache.org/jira/browse/HBASE-27662) | Correct the line logged with flag hbase.procedure.upgrade-to-2-2 in docs | Minor | documentation |
| [HBASE-27713](https://issues.apache.org/jira/browse/HBASE-27713) | Remove numRegions in Region Metrics | Major | metrics |
| [HBASE-27780](https://issues.apache.org/jira/browse/HBASE-27780) | FileChangeWatcher improvements | Major | . |
| [HBASE-27422](https://issues.apache.org/jira/browse/HBASE-27422) | Support replication for hbase:acl | Major | acl, Replication |
| [HBASE-27787](https://issues.apache.org/jira/browse/HBASE-27787) | Downgrade noisy info log in NettyRpcConnection when TLS enabled | Major | . |
| [HBASE-27785](https://issues.apache.org/jira/browse/HBASE-27785) | Encapsulate and centralize totalBufferUsed in ReplicationSourceManager | Major | Replication |
| [HBASE-27536](https://issues.apache.org/jira/browse/HBASE-27536) | Include more request information in slowlog for Scans | Major | . |
| [HBASE-27535](https://issues.apache.org/jira/browse/HBASE-27535) | Separate slowlog thresholds for scans vs other requests | Major | . |
| [HBASE-27818](https://issues.apache.org/jira/browse/HBASE-27818) | Split TestReplicationDroppedTables | Major | Replication, test |
| [HBASE-27808](https://issues.apache.org/jira/browse/HBASE-27808) | Change flatten mode for oss in our pom file | Major | community, pom |
| [HBASE-27819](https://issues.apache.org/jira/browse/HBASE-27819) | 10k RpcServer.MAX\_REQUEST\_SIZE is not enough in ReplicationDroppedTable related tests | Major | test |
| [HBASE-27792](https://issues.apache.org/jira/browse/HBASE-27792) | Guard Master/RS Dump Servlet behind admin walls | Minor | security, UI |
| [HBASE-27821](https://issues.apache.org/jira/browse/HBASE-27821) | Split TestFuzzyRowFilterEndToEnd | Major | test |
| [HBASE-27799](https://issues.apache.org/jira/browse/HBASE-27799) | RpcThrottlingException wait interval message is misleading between 0-1s | Major | . |
| [HBASE-27838](https://issues.apache.org/jira/browse/HBASE-27838) | Update zstd-jni from version 1.5.4-2 -\> 1.5.5-2 | Minor | io |
| [HBASE-27844](https://issues.apache.org/jira/browse/HBASE-27844) | changed type names to avoid conflicts with built-in types | Minor | build |
| [HBASE-27788](https://issues.apache.org/jira/browse/HBASE-27788) | Skip family comparing when compare cells inner the store | Major | Performance |
| [HBASE-27858](https://issues.apache.org/jira/browse/HBASE-27858) | Update surefire version to 3.0.0 and use the SurefireForkNodeFactory | Minor | test |
| [HBASE-27870](https://issues.apache.org/jira/browse/HBASE-27870) | Eliminate the 'WARNING: package jdk.internal.util.random not in java.base' when running UTs with jdk11 | Major | build, pom, test |
| [HBASE-27812](https://issues.apache.org/jira/browse/HBASE-27812) | Provide option in HBase UI to disable stack trace for security | Minor | UI |
| [HBASE-27848](https://issues.apache.org/jira/browse/HBASE-27848) | Should fast-fail if unmatched column family exists when using ImportTsv | Major | mapreduce |
| [HBASE-27876](https://issues.apache.org/jira/browse/HBASE-27876) | Only generate SBOM when releasing | Minor | build, pom |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-27128](https://issues.apache.org/jira/browse/HBASE-27128) | when open archiveRetries totalLogSize calculation mistake | Minor | wal |
| [HBASE-27099](https://issues.apache.org/jira/browse/HBASE-27099) | In the HFileBlock class, the log printing fspread/fsread cost time unit should be milliseconds | Minor | HFile |
| [HBASE-27098](https://issues.apache.org/jira/browse/HBASE-27098) | Fix link for field comments | Minor | . |
| [HBASE-27105](https://issues.apache.org/jira/browse/HBASE-27105) | HBaseInterClusterReplicationEndpoint should honor replication adaptive timeout | Major | Replication |
| [HBASE-26790](https://issues.apache.org/jira/browse/HBASE-26790) | getAllRegionLocations can cache locations with null hostname | Major | . |
| [HBASE-27160](https://issues.apache.org/jira/browse/HBASE-27160) | ClientZKSyncer.deleteDataForClientZkUntilSuccess should break from the loop when deletion is succeeded | Major | Client, Zookeeper |
| [HBASE-27170](https://issues.apache.org/jira/browse/HBASE-27170) | ByteBuffAllocator leak when decompressing blocks near minSizeForReservoirUse | Major | . |
| [HBASE-27171](https://issues.apache.org/jira/browse/HBASE-27171) | Fix Annotation Error in HRegionFileSystem | Trivial | . |
| [HBASE-26708](https://issues.apache.org/jira/browse/HBASE-26708) | Netty "leak detected" and OutOfDirectMemoryError due to direct memory buffering with SASL implementation | Blocker | netty, rpc, sasl |
| [HBASE-27180](https://issues.apache.org/jira/browse/HBASE-27180) | Multiple possible buffer leaks | Major | netty, regionserver |
| [HBASE-27169](https://issues.apache.org/jira/browse/HBASE-27169) | TestSeparateClientZKCluster is flaky | Major | test |
| [HBASE-27189](https://issues.apache.org/jira/browse/HBASE-27189) | NettyServerRpcConnection is not properly closed when the netty channel is closed | Blocker | netty, rpc |
| [HBASE-27097](https://issues.apache.org/jira/browse/HBASE-27097) | SimpleRpcServer is broken | Blocker | rpc |
| [HBASE-27193](https://issues.apache.org/jira/browse/HBASE-27193) | TestZooKeeper is flaky | Major | test, Zookeeper |
| [HBASE-27192](https://issues.apache.org/jira/browse/HBASE-27192) | The retry number for TestSeparateClientZKCluster is too small | Major | test, Zookeeper |
| [HBASE-27053](https://issues.apache.org/jira/browse/HBASE-27053) | IOException during caching of uncompressed block to the block cache. | Major | BlockCache |
| [HBASE-27211](https://issues.apache.org/jira/browse/HBASE-27211) | Data race in MonitoredTaskImpl could cause split wal failure | Critical | monitoring, wal |
| [HBASE-27195](https://issues.apache.org/jira/browse/HBASE-27195) | Clean up netty worker/thread pool configuration | Major | . |
| [HBASE-27219](https://issues.apache.org/jira/browse/HBASE-27219) | Change JONI encoding in RegexStringComparator | Minor | Filters |
| [HBASE-27075](https://issues.apache.org/jira/browse/HBASE-27075) | TestUpdateRSGroupConfiguration.testCustomOnlineConfigChangeInRSGroup is flaky | Minor | rsgroup, test |
| [HBASE-27230](https://issues.apache.org/jira/browse/HBASE-27230) | RegionServer should be aborted when WAL.sync throws TimeoutIOException | Major | wal |
| [HBASE-27204](https://issues.apache.org/jira/browse/HBASE-27204) | BlockingRpcClient will hang for 20 seconds when SASL is enabled after finishing negotiation | Critical | rpc, sasl, security |
| [HBASE-27179](https://issues.apache.org/jira/browse/HBASE-27179) | Issues building with OpenJDK 17 | Minor | build |
| [HBASE-27087](https://issues.apache.org/jira/browse/HBASE-27087) | TestQuotaThrottle times out | Major | test |
| [HBASE-27247](https://issues.apache.org/jira/browse/HBASE-27247) | TestPerTableCFReplication.testParseTableCFsFromConfig is broken because of ReplicationPeerConfigUtil.parseTableCFsFromConfig | Major | Replication |
| [HBASE-27271](https://issues.apache.org/jira/browse/HBASE-27271) | BufferCallBeforeInitHandler should ignore the flush request | Major | IPC/RPC |
| [HBASE-27269](https://issues.apache.org/jira/browse/HBASE-27269) | The implementation of TestReplicationStatus.waitOnMetricsReport is incorrect | Major | Replication, test |
| [HBASE-27282](https://issues.apache.org/jira/browse/HBASE-27282) | CME in AuthManager causes region server crash | Major | acl |
| [HBASE-27275](https://issues.apache.org/jira/browse/HBASE-27275) | graceful\_stop.sh unable to restore the balance state | Blocker | regionserver |
| [HBASE-27292](https://issues.apache.org/jira/browse/HBASE-27292) | Fix build failure against Hadoop 3.3.4 due to added dependency on okhttp | Major | build, hadoop3, pom |
| [HBASE-27311](https://issues.apache.org/jira/browse/HBASE-27311) | The implementation of syncReplicationPeerLock is incomplete | Major | proc-v2, Replication |
| [HBASE-27246](https://issues.apache.org/jira/browse/HBASE-27246) | RSGroupMappingScript#getRSGroup has thread safety problem | Major | rsgroup |
| [HBASE-27325](https://issues.apache.org/jira/browse/HBASE-27325) | the bulkload max call queue size can be update to a wrong value | Minor | IPC/RPC |
| [HBASE-25922](https://issues.apache.org/jira/browse/HBASE-25922) | Disabled sanity checks ignored on snapshot restore | Minor | conf, snapshots |
| [HBASE-27321](https://issues.apache.org/jira/browse/HBASE-27321) | The ReplicationLogCleaner is not thread safe but can be called from different threads at the same time | Critical | master, Replication |
| [HBASE-27152](https://issues.apache.org/jira/browse/HBASE-27152) | Under compaction mark may leak | Major | Compaction |
| [HBASE-27336](https://issues.apache.org/jira/browse/HBASE-27336) | The region visualizer shows 'undefined' region server | Major | master, UI |
| [HBASE-22939](https://issues.apache.org/jira/browse/HBASE-22939) | SpaceQuotas- Bulkload from different hdfs failed when space quotas are turned on. | Major | . |
| [HBASE-27353](https://issues.apache.org/jira/browse/HBASE-27353) | opentelemetry-context jar missing at runtime causes MR jobs to fail | Minor | . |
| [HBASE-27362](https://issues.apache.org/jira/browse/HBASE-27362) | Fix some tests hung by CompactSplit.requestCompactionInternal ignoring compactionsEnabled check | Major | Compaction |
| [HBASE-27352](https://issues.apache.org/jira/browse/HBASE-27352) | Quoted string argument with spaces passed from command line are propagated wrongly to the underlying java class | Minor | shell |
| [HBASE-27368](https://issues.apache.org/jira/browse/HBASE-27368) | Do not need to throw IllegalStateException when peer is not active in ReplicationSource.initialize | Major | regionserver, Replication |
| [HBASE-27386](https://issues.apache.org/jira/browse/HBASE-27386) | Use encoded size for calculating compression ratio in block size predicator | Major | . |
| [HBASE-27381](https://issues.apache.org/jira/browse/HBASE-27381) | Still seeing 'Stuck' in static initialization creating RegionInfo instance | Major | . |
| [HBASE-27409](https://issues.apache.org/jira/browse/HBASE-27409) | Fix the javadoc for WARCRecord | Major | documentation |
| [HBASE-27407](https://issues.apache.org/jira/browse/HBASE-27407) | Fixing check for "description" request param in JMXJsonServlet.java | Minor | metrics |
| [HBASE-27419](https://issues.apache.org/jira/browse/HBASE-27419) | Update to hbase-thirdparty 4.1.2 | Major | dependencies |
| [HBASE-27424](https://issues.apache.org/jira/browse/HBASE-27424) | Upgrade Jettison for CVE-2022-40149/40150 | Major | . |
| [HBASE-27420](https://issues.apache.org/jira/browse/HBASE-27420) | Failure while connecting to zk if HBase is running in standalone mode in a container | Minor | Zookeeper |
| [HBASE-27426](https://issues.apache.org/jira/browse/HBASE-27426) | Region server abort with failing to list region servers. | Major | Zookeeper |
| [HBASE-27433](https://issues.apache.org/jira/browse/HBASE-27433) | DefaultMobStoreCompactor should delete MobStoreFile cleanly when compaction is failed | Major | mob |
| [HBASE-27440](https://issues.apache.org/jira/browse/HBASE-27440) | metrics method removeHistogramMetrics trigger serious memory leak | Major | metrics, regionserver |
| [HBASE-25983](https://issues.apache.org/jira/browse/HBASE-25983) | javadoc generation fails on openjdk-11.0.11+9 | Major | documentation, pom |
| [HBASE-27446](https://issues.apache.org/jira/browse/HBASE-27446) | Spotbugs 4.7.2 report a lot of logging errors when generating report | Major | build, jenkins, scripts |
| [HBASE-27437](https://issues.apache.org/jira/browse/HBASE-27437) | TestHeapSize is flaky | Major | test |
| [HBASE-27472](https://issues.apache.org/jira/browse/HBASE-27472) | The personality script set wrong hadoop2 check version for branch-2 | Major | jenkins, scripts |
| [HBASE-27473](https://issues.apache.org/jira/browse/HBASE-27473) | Fix spotbugs warnings in hbase-rest Client.getResponseBody | Major | REST |
| [HBASE-27480](https://issues.apache.org/jira/browse/HBASE-27480) | Skip error prone for hadoop2/3 checkes in our nightly jobs | Major | jenkins, scripts |
| [HBASE-27469](https://issues.apache.org/jira/browse/HBASE-27469) | IllegalArgumentException is thrown by SnapshotScannerHDFSAclController when dropping a table | Major | snapshots |
| [HBASE-27379](https://issues.apache.org/jira/browse/HBASE-27379) | numOpenConnections metric is one less than the actual | Minor | metrics |
| [HBASE-27423](https://issues.apache.org/jira/browse/HBASE-27423) | Upgrade hbase-thirdparty to 4.1.3 and upgrade Jackson for CVE-2022-42003/42004 | Major | security |
| [HBASE-27464](https://issues.apache.org/jira/browse/HBASE-27464) | In memory compaction 'COMPACT' may cause data corruption when adding cells large than maxAlloc(default 256k) size | Critical | in-memory-compaction |
| [HBASE-27501](https://issues.apache.org/jira/browse/HBASE-27501) | The .flattened-pom.xml for some modules are not installed | Blocker | build, pom |
| [HBASE-27445](https://issues.apache.org/jira/browse/HBASE-27445) | result of DirectMemoryUtils#getDirectMemorySize may be wrong | Minor | UI |
| [HBASE-27504](https://issues.apache.org/jira/browse/HBASE-27504) | Remove duplicated config 'hbase.normalizer.merge.min\_region\_age.days' in hbase-default.xml | Minor | conf |
| [HBASE-27463](https://issues.apache.org/jira/browse/HBASE-27463) | Reset sizeOfLogQueue when refresh replication source | Minor | Replication |
| [HBASE-27484](https://issues.apache.org/jira/browse/HBASE-27484) | FNFE on StoreFileScanner after a flush followed by a compaction | Major | . |
| [HBASE-27519](https://issues.apache.org/jira/browse/HBASE-27519) | Another case for FNFE on StoreFileScanner after a flush followed by a compaction | Major | . |
| [HBASE-27524](https://issues.apache.org/jira/browse/HBASE-27524) | Fix python requirements problem | Major | scripts, security |
| [HBASE-27390](https://issues.apache.org/jira/browse/HBASE-27390) | getClusterMetrics NullPointerException when ServerTask status null | Major | . |
| [HBASE-27485](https://issues.apache.org/jira/browse/HBASE-27485) | HBaseTestingUtility minicluster requires log4j2 | Major | test |
| [HBASE-27489](https://issues.apache.org/jira/browse/HBASE-27489) | Fix several problems after HBASE-27304 | Minor | master, regionserver |
| [HBASE-27546](https://issues.apache.org/jira/browse/HBASE-27546) | Bump gitpython from 3.1.29 to 3.1.30 in /dev-support/git-jira-release-audit | Major | scripts, security |
| [HBASE-27566](https://issues.apache.org/jira/browse/HBASE-27566) | Bump gitpython from 3.1.29 to 3.1.30 in /dev-support | Major | scripts, security |
| [HBASE-27560](https://issues.apache.org/jira/browse/HBASE-27560) | CatalogJanitor consistencyCheck cannot report the hole on last region if next table is disabled in meta | Minor | hbck2 |
| [HBASE-27563](https://issues.apache.org/jira/browse/HBASE-27563) | ChaosMonkey sometimes generates invalid boundaries for random item selection | Minor | integration tests |
| [HBASE-27561](https://issues.apache.org/jira/browse/HBASE-27561) | hbase.master.port is ignored in processing of hbase.masters | Minor | Client |
| [HBASE-27528](https://issues.apache.org/jira/browse/HBASE-27528) | log duplication issues in MasterRpcServices | Major | logging, master, rpc, security |
| [HBASE-27579](https://issues.apache.org/jira/browse/HBASE-27579) | CatalogJanitor can cause data loss due to errors during cleanMergeRegion | Blocker | . |
| [HBASE-26300](https://issues.apache.org/jira/browse/HBASE-26300) | Skip archived master wals during incremental backups | Major | backup&restore |
| [HBASE-27586](https://issues.apache.org/jira/browse/HBASE-27586) | Bump up commons-codec to 1.15 | Major | dependencies, security |
| [HBASE-27547](https://issues.apache.org/jira/browse/HBASE-27547) | Close store file readers after region warmup | Major | regionserver |
| [HBASE-26967](https://issues.apache.org/jira/browse/HBASE-26967) | FilterList with FuzzyRowFilter and SingleColumnValueFilter evaluated with operator MUST\_PASS\_ONE doesn't work as expected | Critical | Filters |
| [HBASE-27585](https://issues.apache.org/jira/browse/HBASE-27585) | Bump up jruby to 9.3.9.0 and related joni and jcodings to 2.1.43 and 1.0.57 respectively | Major | jruby, security, shell |
| [HBASE-27608](https://issues.apache.org/jira/browse/HBASE-27608) | Use lowercase image reference name in our docker file | Major | scripts |
| [HBASE-27599](https://issues.apache.org/jira/browse/HBASE-27599) | Cleanup wrong dependency in dependencyManagement | Major | build, dependencies, hadoop3, pom |
| [HBASE-27600](https://issues.apache.org/jira/browse/HBASE-27600) | Make the behavior of hadoop profile consistent | Major | build, dependencies, hadoop3, pom |
| [HBASE-27580](https://issues.apache.org/jira/browse/HBASE-27580) | Reverse scan over rows with tags throw exceptions when using DataBlockEncoding | Major | . |
| [HBASE-27622](https://issues.apache.org/jira/browse/HBASE-27622) | Bump cryptography from 3.3.2 to 39.0.1 in /dev-support/git-jira-release-audit | Major | dependabot, scripts, security |
| [HBASE-27619](https://issues.apache.org/jira/browse/HBASE-27619) | Bulkload fails when trying to bulkload files with invalid names after HBASE-26707 | Major | . |
| [HBASE-27621](https://issues.apache.org/jira/browse/HBASE-27621) | Also clear the Dictionary when resetting when reading compressed WAL file | Critical | Replication, wal |
| [HBASE-27602](https://issues.apache.org/jira/browse/HBASE-27602) | Remove the impact of operating env on testHFileCleaning | Major | test |
| [HBASE-27637](https://issues.apache.org/jira/browse/HBASE-27637) | Zero length value would cause value compressor read nothing and not advance the position of the InputStream | Critical | dataloss, wal |
| [HBASE-27648](https://issues.apache.org/jira/browse/HBASE-27648) | CopyOnWriteArrayMap does not honor contract of ConcurrentMap.putIfAbsent | Major | . |
| [HBASE-27636](https://issues.apache.org/jira/browse/HBASE-27636) | The "CREATE\_TIME\_TS" value of the hfile generated by the HFileOutputFormat2 class is 0 | Major | HFile, mapreduce |
| [HBASE-27654](https://issues.apache.org/jira/browse/HBASE-27654) | IndexBlockEncoding is missing in HFileContextBuilder copy constructor | Major | . |
| [HBASE-27661](https://issues.apache.org/jira/browse/HBASE-27661) | Set size of systable queue in UT | Major | . |
| [HBASE-27649](https://issues.apache.org/jira/browse/HBASE-27649) | WALPlayer does not properly dedupe overridden cell versions | Major | . |
| [HBASE-27644](https://issues.apache.org/jira/browse/HBASE-27644) | Should not return false when WALKey has no following KVs while reading WAL file | Critical | dataloss, wal |
| [HBASE-27668](https://issues.apache.org/jira/browse/HBASE-27668) | PB's parseDelimitedFrom can successfully return when there are not enough bytes | Critical | Protobufs, wal |
| [HBASE-27650](https://issues.apache.org/jira/browse/HBASE-27650) | Merging empty regions corrupts meta cache | Major | . |
| [HBASE-24781](https://issues.apache.org/jira/browse/HBASE-24781) | Clean up peer metrics when disabling peer | Major | Replication |
| [HBASE-27673](https://issues.apache.org/jira/browse/HBASE-27673) | Fix mTLS client hostname verification | Major | rpc |
| [HBASE-25709](https://issues.apache.org/jira/browse/HBASE-25709) | Close region may stuck when region is compacting and skipped most cells read | Major | Compaction |
| [HBASE-27250](https://issues.apache.org/jira/browse/HBASE-27250) | MasterRpcService#setRegionStateInMeta does not support replica region encodedNames or region names | Minor | . |
| [HBASE-27690](https://issues.apache.org/jira/browse/HBASE-27690) | Fix a misspell in TestRegionStateStore | Minor | test |
| [HBASE-27701](https://issues.apache.org/jira/browse/HBASE-27701) | ZStdCodec codec implementation class documentation typo | Minor | documentation |
| [HBASE-27688](https://issues.apache.org/jira/browse/HBASE-27688) | HFile splitting occurs during bulkload, the CREATE\_TIME\_TS of hfileinfo is 0 | Major | HFile |
| [HBASE-27714](https://issues.apache.org/jira/browse/HBASE-27714) | WALEntryStreamTestBase creates a new HBTU in startCluster method which causes all sub classes are testing default configurations | Major | Replication, test |
| [HBASE-27716](https://issues.apache.org/jira/browse/HBASE-27716) | Fix TestWALOpenAfterDNRollingStart | Major | test |
| [HBASE-27708](https://issues.apache.org/jira/browse/HBASE-27708) | CPU hot-spot resolving User subject | Major | Client, tracing |
| [HBASE-27729](https://issues.apache.org/jira/browse/HBASE-27729) | Missed one parameter when logging exception in StoreFileListFile | Major | logging |
| [HBASE-27718](https://issues.apache.org/jira/browse/HBASE-27718) | The regionStateNode only need remove once in regionOffline | Minor | amv2 |
| [HBASE-27651](https://issues.apache.org/jira/browse/HBASE-27651) | hbase-daemon.sh foreground\_start should propagate SIGHUP and SIGTERM | Minor | scripts |
| [HBASE-27671](https://issues.apache.org/jira/browse/HBASE-27671) | Client should not be able to restore/clone a snapshot after it's TTL has expired | Minor | . |
| [HBASE-27732](https://issues.apache.org/jira/browse/HBASE-27732) | NPE in TestBasicWALEntryStreamFSHLog.testEOFExceptionInOldWALsDirectory | Major | Replication |
| [HBASE-27333](https://issues.apache.org/jira/browse/HBASE-27333) | Abort RS when the hostname is different from master seen | Major | regionserver |
| [HBASE-27726](https://issues.apache.org/jira/browse/HBASE-27726) | ruby shell not handled SyntaxError exceptions properly | Minor | shell |
| [HBASE-27704](https://issues.apache.org/jira/browse/HBASE-27704) | Quotas can drastically overflow configured limit | Major | . |
| [HBASE-27778](https://issues.apache.org/jira/browse/HBASE-27778) | Incorrect ReplicationSourceWALReader. totalBufferUsed may cause replication hang up | Major | Replication |
| [HBASE-27796](https://issues.apache.org/jira/browse/HBASE-27796) | Improve MemcachedBlockCache | Major | . |
| [HBASE-27807](https://issues.apache.org/jira/browse/HBASE-27807) | PressureAwareCompactionThroughputController#tune log the opposite of the actual scenario | Trivial | Compaction |
| [HBASE-27810](https://issues.apache.org/jira/browse/HBASE-27810) | HBCK throws RejectedExecutionException when closing ZooKeeper resources | Major | hbck |
| [HBASE-27822](https://issues.apache.org/jira/browse/HBASE-27822) | TestFromClientSide5.testAppendWithoutWAL is flaky | Major | scan, test |
| [HBASE-27823](https://issues.apache.org/jira/browse/HBASE-27823) | NPE in ClaimReplicationQueuesProcedure when running TestAssignmentManager.testAssignSocketTimeout | Major | test |
| [HBASE-27824](https://issues.apache.org/jira/browse/HBASE-27824) | NPE in MetricsMasterWrapperImpl.isRunning | Major | test |
| [HBASE-27851](https://issues.apache.org/jira/browse/HBASE-27851) | TestListTablesByState is silently failing due to a surefire bug | Minor | test |
| [HBASE-27857](https://issues.apache.org/jira/browse/HBASE-27857) | HBaseClassTestRule: system exit not restored if test times out may cause test to hang | Minor | test |
| [HBASE-27860](https://issues.apache.org/jira/browse/HBASE-27860) | Fix build error against Hadoop 3.3.5 | Major | build, hadoop3 |
| [HBASE-27865](https://issues.apache.org/jira/browse/HBASE-27865) | TestThriftServerCmdLine fails with org.apache.hadoop.hbase.SystemExitRule$SystemExitInTestException | Major | test, Thrift |
| [HBASE-27874](https://issues.apache.org/jira/browse/HBASE-27874) | Problem in flakey generated report causes pre-commit run to fail | Major | build |
| [HBASE-27277](https://issues.apache.org/jira/browse/HBASE-27277) | TestRaceBetweenSCPAndTRSP fails in pre commit | Major | proc-v2, test |
| [HBASE-27867](https://issues.apache.org/jira/browse/HBASE-27867) | Close the L1 victim handler race | Minor | BlockCache |
| [HBASE-27872](https://issues.apache.org/jira/browse/HBASE-27872) | xerial's snappy-java requires GLIBC \>= 2.32 | Minor | . |
| [HBASE-27793](https://issues.apache.org/jira/browse/HBASE-27793) | Make HBCK be able to report unknown servers | Major | hbck |


### TESTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-23963](https://issues.apache.org/jira/browse/HBASE-23963) | Split TestFromClientSide; it takes too long to complete timing out | Major | test |
| [HBASE-27161](https://issues.apache.org/jira/browse/HBASE-27161) | Improve TestMultiRespectsLimits | Minor | test |
| [HBASE-27360](https://issues.apache.org/jira/browse/HBASE-27360) | The trace related assertions are flaky for async client tests | Major | test, tracing |
| [HBASE-27479](https://issues.apache.org/jira/browse/HBASE-27479) | Flaky Test testClone in TestTaskMonitor | Trivial | test |
| [HBASE-27595](https://issues.apache.org/jira/browse/HBASE-27595) | ThreadGroup is removed since Hadoop 3.2.4 | Minor | . |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-27111](https://issues.apache.org/jira/browse/HBASE-27111) | Make Netty channel bytebuf allocator configurable | Major | . |
| [HBASE-26095](https://issues.apache.org/jira/browse/HBASE-26095) | Modify our ref guide to mention the deprecation of HBTU and also how to make use of the new TestingHBaseCluster | Major | documentation |
| [HBASE-27166](https://issues.apache.org/jira/browse/HBASE-27166) | WAL value compression minor improvements | Minor | . |
| [HBASE-27194](https://issues.apache.org/jira/browse/HBASE-27194) | Add test coverage for SimpleRpcServer | Major | . |
| [HBASE-27200](https://issues.apache.org/jira/browse/HBASE-27200) | Clean up error-prone findings in hbase-archetypes | Major | . |
| [HBASE-27202](https://issues.apache.org/jira/browse/HBASE-27202) | Clean up error-prone findings in hbase-balancer | Major | . |
| [HBASE-27220](https://issues.apache.org/jira/browse/HBASE-27220) | Apply the spotless format change in HBASE-27208 to our code base | Major | . |
| [HBASE-27235](https://issues.apache.org/jira/browse/HBASE-27235) | Clean up error-prone findings in hbase-hadoop-compat | Major | . |
| [HBASE-27210](https://issues.apache.org/jira/browse/HBASE-27210) | Clean up error-prone findings in hbase-endpoint | Major | . |
| [HBASE-27236](https://issues.apache.org/jira/browse/HBASE-27236) | Clean up error-prone findings in hbase-hbtop | Major | . |
| [HBASE-27203](https://issues.apache.org/jira/browse/HBASE-27203) | Clean up error-prone findings in hbase-client | Major | . |
| [HBASE-27164](https://issues.apache.org/jira/browse/HBASE-27164) | Add 3.0.0-alpha-3 to download page | Major | website |
| [HBASE-27165](https://issues.apache.org/jira/browse/HBASE-27165) | Set version as 3.0.0-alpha-4-SNAPSHOT in master | Major | build, pom |
| [HBASE-27265](https://issues.apache.org/jira/browse/HBASE-27265) | Tool to read the contents of the storefile tracker file | Minor | . |
| [HBASE-27284](https://issues.apache.org/jira/browse/HBASE-27284) | Add 1.7.2 to download page | Major | website |
| [HBASE-27288](https://issues.apache.org/jira/browse/HBASE-27288) | Update compatibility matrix and release manager section in our ref guide about the EOL of 1.x | Major | documentation |
| [HBASE-27270](https://issues.apache.org/jira/browse/HBASE-27270) | Add bulkloadExecutor.resizeQueues | Minor | regionserver, rpc |
| [HBASE-27240](https://issues.apache.org/jira/browse/HBASE-27240) | Clean up error-prone findings in hbase-http | Major | . |
| [HBASE-27201](https://issues.apache.org/jira/browse/HBASE-27201) | Clean up error-prone findings in hbase-backup | Major | . |
| [HBASE-27293](https://issues.apache.org/jira/browse/HBASE-27293) | Remove jenkins and personality scripts support for 1.x | Major | scripts |
| [HBASE-27212](https://issues.apache.org/jira/browse/HBASE-27212) | Implement a new table based replication queue storage and make the minimum replication system work | Major | Replication |
| [HBASE-27301](https://issues.apache.org/jira/browse/HBASE-27301) | Add Delete addFamilyVersion timestamp verify | Minor | Client |
| [HBASE-26969](https://issues.apache.org/jira/browse/HBASE-26969) | Eliminate MOB renames when SFT is enabled | Major | mob |
| [HBASE-27213](https://issues.apache.org/jira/browse/HBASE-27213) | Add support for claim queue operation | Major | Replication |
| [HBASE-27252](https://issues.apache.org/jira/browse/HBASE-27252) | Clean up error-prone findings in hbase-it | Major | . |
| [HBASE-27234](https://issues.apache.org/jira/browse/HBASE-27234) | Clean up error-prone findings in hbase-examples | Major | . |
| [HBASE-27206](https://issues.apache.org/jira/browse/HBASE-27206) | Clean up error-prone findings in hbase-common | Major | . |
| [HBASE-27214](https://issues.apache.org/jira/browse/HBASE-27214) | Implement the new replication hfile/log cleaner | Major | master, Replication |
| [HBASE-27317](https://issues.apache.org/jira/browse/HBASE-27317) | Correcting the Store file tracker tool help doc option | Minor | . |
| [HBASE-27215](https://issues.apache.org/jira/browse/HBASE-27215) | Add support for sync replication | Major | Replication |
| [HBASE-27310](https://issues.apache.org/jira/browse/HBASE-27310) | Add disabled table is displayed red on master web tables list | Minor | UI |
| [HBASE-27289](https://issues.apache.org/jira/browse/HBASE-27289) | Remove 1.7.x from our download page | Major | website |
| [HBASE-27392](https://issues.apache.org/jira/browse/HBASE-27392) | Add a new procedure type for implementing some global operations such as migration | Major | proc-v2 |
| [HBASE-27403](https://issues.apache.org/jira/browse/HBASE-27403) | Remove 'Remove unhelpful javadoc stubs' spotless rule for now | Major | documentation, pom |
| [HBASE-27401](https://issues.apache.org/jira/browse/HBASE-27401) | Clean up current broken 'n's in our javadoc | Major | documentation |
| [HBASE-27405](https://issues.apache.org/jira/browse/HBASE-27405) | Fix the replication hfile/log cleaner report that the replication table does not exist | Major | master, Replication |
| [HBASE-27421](https://issues.apache.org/jira/browse/HBASE-27421) | Bump spotless plugin to 2.27.2 and reimplement the 'Remove unhelpful javadoc stubs' rule | Major | documentation, pom |
| [HBASE-27218](https://issues.apache.org/jira/browse/HBASE-27218) | Support rolling upgrading | Major | migration, Replication |
| [HBASE-27475](https://issues.apache.org/jira/browse/HBASE-27475) | Use different jdks when running hadoopcheck in personality scripts | Critical | jenkins, scripts |
| [HBASE-27309](https://issues.apache.org/jira/browse/HBASE-27309) | Add major compact table or region operation on master web table page | Minor | Compaction, UI |
| [HBASE-27217](https://issues.apache.org/jira/browse/HBASE-27217) | Revisit the DumpReplicationQueues tool | Major | Replication, tooling |
| [HBASE-27429](https://issues.apache.org/jira/browse/HBASE-27429) | Add exponential retry backoff support for MigrateReplicationQueueFromZkToTableProcedure | Major | master, proc-v2, Replication |
| [HBASE-27430](https://issues.apache.org/jira/browse/HBASE-27430) | Should disable replication log cleaner when migrating replication queue data | Major | master, Replication |
| [HBASE-27518](https://issues.apache.org/jira/browse/HBASE-27518) | Add 2.5.2 to download page | Major | website |
| [HBASE-27557](https://issues.apache.org/jira/browse/HBASE-27557) | [JDK17] Update shade plugin version | Minor | . |
| [HBASE-27591](https://issues.apache.org/jira/browse/HBASE-27591) | [JDK17] Fix failure TestImmutableScan#testScanCopyConstructor | Minor | . |
| [HBASE-27581](https://issues.apache.org/jira/browse/HBASE-27581) | [JDK17] Fix failure TestHBaseTestingUtil#testResolvePortConflict | Minor | test |
| [HBASE-27610](https://issues.apache.org/jira/browse/HBASE-27610) | Add 2.4.16 to download page | Major | website |
| [HBASE-27611](https://issues.apache.org/jira/browse/HBASE-27611) | update download.xml for release 2.5.3 | Minor | website |
| [HBASE-27643](https://issues.apache.org/jira/browse/HBASE-27643) | [JDK17] Add-opens java.util.concurrent | Major | java, test |
| [HBASE-27669](https://issues.apache.org/jira/browse/HBASE-27669) | chaos-daemon.sh should make use hbase script start/stop chaosagent and chaos monkey runner. | Major | . |
| [HBASE-27216](https://issues.apache.org/jira/browse/HBASE-27216) | Revisit the ReplicationSyncUp tool | Major | Replication, tooling |
| [HBASE-27745](https://issues.apache.org/jira/browse/HBASE-27745) | Document protoc workarounds with Apple Silicon | Major | documentation |
| [HBASE-27750](https://issues.apache.org/jira/browse/HBASE-27750) | Update the list of prefetched hfiles upon simple block eviction | Major | BucketCache |
| [HBASE-27623](https://issues.apache.org/jira/browse/HBASE-27623) | Start a new ReplicationSyncUp after the previous failed | Major | Replication, tooling |
| [HBASE-27772](https://issues.apache.org/jira/browse/HBASE-27772) | Add 2.4.17 to download page | Major | website |
| [HBASE-27775](https://issues.apache.org/jira/browse/HBASE-27775) | Use a separate WAL provider for hbase:replication table | Major | Replication |
| [HBASE-27727](https://issues.apache.org/jira/browse/HBASE-27727) | Implement filesystem based Replication peer storage | Major | Replication |
| [HBASE-27728](https://issues.apache.org/jira/browse/HBASE-27728) | Implement a tool to migrate replication peer data between different storage implementation | Major | Replication |
| [HBASE-27274](https://issues.apache.org/jira/browse/HBASE-27274) | Re-enable the disabled tests when implementing HBASE-27212 | Major | test |
| [HBASE-27783](https://issues.apache.org/jira/browse/HBASE-27783) | Implement a shell command to disable all peer modification | Major | Replication, shell |
| [HBASE-20804](https://issues.apache.org/jira/browse/HBASE-20804) | Document and add tests for HBaseConfTool | Major | documentation, tooling |
| [HBASE-27809](https://issues.apache.org/jira/browse/HBASE-27809) | Attach move replication queue storage from zookeeper to a separated HBase table design doc to git repo | Major | documentation, Replication |
| [HBASE-27803](https://issues.apache.org/jira/browse/HBASE-27803) | Update ref guide about the changes of the replication storage related concepts | Major | documentation, Replication |
| [HBASE-27806](https://issues.apache.org/jira/browse/HBASE-27806) | Support dynamic reinitializing replication peer storage | Major | conf, Replication |
| [HBASE-27516](https://issues.apache.org/jira/browse/HBASE-27516) | Document the table based replication queue storage in ref guide | Major | documentation, Replication |
| [HBASE-27752](https://issues.apache.org/jira/browse/HBASE-27752) | Update the list of prefetched files upon region movement | Major | BucketCache |
| [HBASE-27852](https://issues.apache.org/jira/browse/HBASE-27852) | Interrupt BucketCachePersister thread when BucketCache is shutdown | Major | BucketCache |
| [HBASE-27843](https://issues.apache.org/jira/browse/HBASE-27843) | If moveAndClose fails HFileArchiver should delete any incomplete archive side changes | Major | . |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-13126](https://issues.apache.org/jira/browse/HBASE-13126) | Provide alternate mini cluster classes other than HBTU for downstream users to write unit tests | Critical | API, test |
| [HBASE-27036](https://issues.apache.org/jira/browse/HBASE-27036) | Displays the number of decommissioned region server for status command | Minor | . |
| [HBASE-27736](https://issues.apache.org/jira/browse/HBASE-27736) | HFileSystem.getLocalFs is not used | Major | HFile |
| [HBASE-27141](https://issues.apache.org/jira/browse/HBASE-27141) | Upgrade hbase-thirdparty dependency to 4.1.1 | Critical | dependencies, security, thirdparty |
| [HBASE-27172](https://issues.apache.org/jira/browse/HBASE-27172) | Upgrade OpenTelemetry dependency to 1.15.0 | Major | build |
| [HBASE-27175](https://issues.apache.org/jira/browse/HBASE-27175) | Failure to cleanup WAL split dir log should be at INFO level | Minor | . |
| [HBASE-27148](https://issues.apache.org/jira/browse/HBASE-27148) | Move minimum hadoop 3 support version to 3.2.3 | Major | dependencies, hadoop3, security |
| [HBASE-27182](https://issues.apache.org/jira/browse/HBASE-27182) | Rework tracing configuration | Major | scripts |
| [HBASE-27190](https://issues.apache.org/jira/browse/HBASE-27190) | Add some docs about exporting and importing snapshots using Aliyun object storage service(OSS) | Major | documentation, snapshots |
| [HBASE-27248](https://issues.apache.org/jira/browse/HBASE-27248) | WALPrettyPrinter add print timestamp | Minor | tooling, wal |
| [HBASE-27281](https://issues.apache.org/jira/browse/HBASE-27281) | Add default implementation for Connection$getClusterId | Critical | Client |
| [HBASE-27221](https://issues.apache.org/jira/browse/HBASE-27221) | Bump spotless version to 2.24.1 | Major | build, pom |
| [HBASE-27294](https://issues.apache.org/jira/browse/HBASE-27294) | Add new hadoop releases in our hadoop checks | Major | scripts |
| [HBASE-27345](https://issues.apache.org/jira/browse/HBASE-27345) | Add 2.4.14 to the downloads page | Minor | documentation |
| [HBASE-27350](https://issues.apache.org/jira/browse/HBASE-27350) | Add 2.5.0 to the downloads page | Major | community |
| [HBASE-27351](https://issues.apache.org/jira/browse/HBASE-27351) | Add 2.5 Documentation to the website | Major | community |
| [HBASE-25563](https://issues.apache.org/jira/browse/HBASE-25563) | Add "2.4 Documentation" to the website | Major | community, documentation |
| [HBASE-27226](https://issues.apache.org/jira/browse/HBASE-27226) | Document native TLS support in Netty RPC | Major | documentation |
| [HBASE-27371](https://issues.apache.org/jira/browse/HBASE-27371) | Bump spotbugs version | Major | build, pom |
| [HBASE-27373](https://issues.apache.org/jira/browse/HBASE-27373) | Fix new spotbugs warnings after upgrading spotbugs to 4.7.2 | Major | . |
| [HBASE-27372](https://issues.apache.org/jira/browse/HBASE-27372) | Update java versions in our Dockerfiles | Major | build, scripts |
| [HBASE-27411](https://issues.apache.org/jira/browse/HBASE-27411) | Update and clean up bcprov-jdk15on dependency | Minor | build |
| [HBASE-27344](https://issues.apache.org/jira/browse/HBASE-27344) | Update ref guide about the 2.5.x release line | Major | documentation |
| [HBASE-27425](https://issues.apache.org/jira/browse/HBASE-27425) | Run flaky test job more often | Minor | test |
| [HBASE-27442](https://issues.apache.org/jira/browse/HBASE-27442) | Change the way of bumping version in release scripts | Major | community, scripts |
| [HBASE-27460](https://issues.apache.org/jira/browse/HBASE-27460) | Fix the hadolint errors after HBASE-27456 | Major | scripts |
| [HBASE-27312](https://issues.apache.org/jira/browse/HBASE-27312) | Update create-release to work with maven-gpg-plugin-3.0.1 and gnupg \>= 2.1.x | Major | build |
| [HBASE-27477](https://issues.apache.org/jira/browse/HBASE-27477) | Tweak hbase-vote.sh to support hbase-thirdparty | Major | community |
| [HBASE-27443](https://issues.apache.org/jira/browse/HBASE-27443) | Use java11 in the general check of our jenkins job | Major | build, jenkins |
| [HBASE-27513](https://issues.apache.org/jira/browse/HBASE-27513) | Modify README.txt to mention how to contribue | Major | community |
| [HBASE-27548](https://issues.apache.org/jira/browse/HBASE-27548) | Bump jettison from 1.5.1 to 1.5.2 | Major | dependabot, dependencies, security |
| [HBASE-27567](https://issues.apache.org/jira/browse/HBASE-27567) | Introduce ChaosMonkey Action to print HDFS Cluster status | Minor | integration tests |
| [HBASE-27568](https://issues.apache.org/jira/browse/HBASE-27568) | ChaosMonkey add support for JournalNodes | Major | integration tests |
| [HBASE-27575](https://issues.apache.org/jira/browse/HBASE-27575) | Bump future from 0.18.2 to 0.18.3 in /dev-support | Minor | . |
| [HBASE-27578](https://issues.apache.org/jira/browse/HBASE-27578) | Upgrade hbase-thirdparty to 4.1.4 | Blocker | dependencies, security |
| [HBASE-27588](https://issues.apache.org/jira/browse/HBASE-27588) | "Instantiating StoreFileTracker impl" INFO level logging is too chatty | Minor | . |
| [HBASE-27456](https://issues.apache.org/jira/browse/HBASE-27456) | Upgrade the dockerfile used in nightly and pre commit to ubuntu 22.04 | Major | jenkins, scripts |
| [HBASE-27689](https://issues.apache.org/jira/browse/HBASE-27689) | Update README.md about how to request a jira account | Major | community |
| [HBASE-27685](https://issues.apache.org/jira/browse/HBASE-27685) | Enable code coverage reporting to SonarQube in HBase | Minor | . |
| [HBASE-27715](https://issues.apache.org/jira/browse/HBASE-27715) | Refactoring the long tryAdvanceEntry method in WALEntryStream | Major | Replication |
| [HBASE-27702](https://issues.apache.org/jira/browse/HBASE-27702) | Remove 'hbase.regionserver.hlog.writer.impl' config | Major | wal |
| [HBASE-27722](https://issues.apache.org/jira/browse/HBASE-27722) | Update documentation about how to enable encryption on WAL | Major | documentation, wal |
| [HBASE-27737](https://issues.apache.org/jira/browse/HBASE-27737) | Add supplemental model for com.aayushatharva.brotli4j:native-osx-aarch64 | Minor | build, community |
| [HBASE-27748](https://issues.apache.org/jira/browse/HBASE-27748) | Bump jettison from 1.5.2 to 1.5.4 | Major | dependabot, dependencies, security |
| [HBASE-27774](https://issues.apache.org/jira/browse/HBASE-27774) | Move Dockerfile and python-requirements.txt used only by flaky-tests job | Minor | build, community, documentation |
| [HBASE-27720](https://issues.apache.org/jira/browse/HBASE-27720) | TestClusterRestartFailover is flakey due to metrics assertion | Minor | test |
| [HBASE-27791](https://issues.apache.org/jira/browse/HBASE-27791) | Upgrade vega and its related js libraries | Major | UI |
| [HBASE-27762](https://issues.apache.org/jira/browse/HBASE-27762) | Include EventType and ProcedureV2 pid in logging via MDC | Major | . |
| [HBASE-27863](https://issues.apache.org/jira/browse/HBASE-27863) | Add hadoop 3.3.5 check in our personality script | Major | jenkins, scripts |
| [HBASE-27864](https://issues.apache.org/jira/browse/HBASE-27864) | Reduce the Cardinality for TestFuzzyRowFilterEndToEndLarge | Major | test |
| [HBASE-27634](https://issues.apache.org/jira/browse/HBASE-27634) | Builds emit errors related to SBOM parsing | Minor | build |
| [HBASE-27879](https://issues.apache.org/jira/browse/HBASE-27879) | Bump requests from 2.22.0 to 2.31.0 in /dev-support/git-jira-release-audit | Major | dependabot, scripts, security |
| [HBASE-27880](https://issues.apache.org/jira/browse/HBASE-27880) | Bump requests from 2.28.1 to 2.31.0 in /dev-support/flaky-tests | Major | dependabot, scripts, security |


## Release 3.0.0-alpha-3 - Unreleased (as of 2022-06-15)



### NEW FEATURES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26956](https://issues.apache.org/jira/browse/HBASE-26956) | ExportSnapshot tool supports removing TTL | Major | snapshots |
| [HBASE-26342](https://issues.apache.org/jira/browse/HBASE-26342) | Support custom paths of independent configuration and pool for hfile cleaner | Major | master |
| [HBASE-27018](https://issues.apache.org/jira/browse/HBASE-27018) | Add a tool command list\_liveservers | Major | . |
| [HBASE-26617](https://issues.apache.org/jira/browse/HBASE-26617) | Use spotless to reduce the pain on fixing checkstyle issues | Major | build, community |
| [HBASE-26959](https://issues.apache.org/jira/browse/HBASE-26959) | Brotli compression support | Minor | . |
| [HBASE-25865](https://issues.apache.org/jira/browse/HBASE-25865) | Visualize current state of region assignment | Blocker | master, Operability, Usability |
| [HBASE-26323](https://issues.apache.org/jira/browse/HBASE-26323) | Introduce a SnapshotProcedure | Major | proc-v2, snapshots |
| [HBASE-26703](https://issues.apache.org/jira/browse/HBASE-26703) | Allow configuration of IPC queue balancer | Minor | . |
| [HBASE-26576](https://issues.apache.org/jira/browse/HBASE-26576) | Allow Pluggable Queue to belong to FastPath or normal Balanced Executor | Minor | regionserver, rpc |
| [HBASE-26347](https://issues.apache.org/jira/browse/HBASE-26347) | Support detect and exclude slow DNs in fan-out of WAL | Major | wal |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26923](https://issues.apache.org/jira/browse/HBASE-26923) | PerformanceEvaluation support encryption option | Minor | PE |
| [HBASE-26983](https://issues.apache.org/jira/browse/HBASE-26983) | Upgrade JRuby to 9.3.4.0 | Major | shell |
| [HBASE-27095](https://issues.apache.org/jira/browse/HBASE-27095) | HbckChore should produce a report | Major | hbck2, master |
| [HBASE-27046](https://issues.apache.org/jira/browse/HBASE-27046) | The filenum in AbstractFSWAL should be monotone increasing | Major | . |
| [HBASE-27093](https://issues.apache.org/jira/browse/HBASE-27093) | AsyncNonMetaRegionLocatorput Complete CompletableFuture outside lock block | Major | asyncclient, Client |
| [HBASE-26993](https://issues.apache.org/jira/browse/HBASE-26993) | Make the new framework for region replication could work for SKIP\_WAL | Major | read replicas |
| [HBASE-26649](https://issues.apache.org/jira/browse/HBASE-26649) | Support meta replica LoadBalance mode for RegionLocator#getAllRegionLocations() | Major | meta replicas |
| [HBASE-26320](https://issues.apache.org/jira/browse/HBASE-26320) | Separate Log Cleaner DirScanPool to prevent the OLDWALs from filling up the disk when archive is large | Major | Operability |
| [HBASE-27043](https://issues.apache.org/jira/browse/HBASE-27043) | Let lock wait timeout to improve performance of SnapshotHFileCleaner | Major | snapshots |
| [HBASE-25465](https://issues.apache.org/jira/browse/HBASE-25465) | Use javac --release option for supporting cross version compilation | Minor | create-release |
| [HBASE-27040](https://issues.apache.org/jira/browse/HBASE-27040) | Optimize the log display of the ZKProcedureUtil.java | Minor | proc-v2 |
| [HBASE-27013](https://issues.apache.org/jira/browse/HBASE-27013) | Introduce read all bytes when using pread for prefetch | Major | HFile, Performance |
| [HBASE-27003](https://issues.apache.org/jira/browse/HBASE-27003) | Optimize log format for PerformanceEvaluation | Minor | . |
| [HBASE-26943](https://issues.apache.org/jira/browse/HBASE-26943) | HMaster page style display confusion | Minor | master |
| [HBASE-26990](https://issues.apache.org/jira/browse/HBASE-26990) | Add default implementation for BufferedMutator interface setters | Minor | . |
| [HBASE-26419](https://issues.apache.org/jira/browse/HBASE-26419) | Tracing Spans of RPCs should follow otel semantic conventions | Blocker | tracing |
| [HBASE-26886](https://issues.apache.org/jira/browse/HBASE-26886) | Add unit test for custom RpcControllerFactory's ability to overwrite priorities | Minor | . |
| [HBASE-26975](https://issues.apache.org/jira/browse/HBASE-26975) | Add on heap and off heap memstore info in rs web UI | Minor | UI |
| [HBASE-26980](https://issues.apache.org/jira/browse/HBASE-26980) | Update javadoc of BucketCache.java | Trivial | documentation |
| [HBASE-26581](https://issues.apache.org/jira/browse/HBASE-26581) | Add metrics around failed replication edits | Minor | metrics, Replication |
| [HBASE-26971](https://issues.apache.org/jira/browse/HBASE-26971) | SnapshotInfo --snapshot param is marked as required even when trying to list all snapshots | Minor | . |
| [HBASE-26807](https://issues.apache.org/jira/browse/HBASE-26807) | Unify CallQueueTooBigException special pause with CallDroppedException | Major | . |
| [HBASE-26942](https://issues.apache.org/jira/browse/HBASE-26942) | cache region locations when getAllRegionLocations() | Minor | Client |
| [HBASE-26891](https://issues.apache.org/jira/browse/HBASE-26891) | Make MetricsConnection scope configurable | Minor | . |
| [HBASE-26947](https://issues.apache.org/jira/browse/HBASE-26947) | Implement a special TestAppender to limit the size of test output | Major | logging, test |
| [HBASE-26618](https://issues.apache.org/jira/browse/HBASE-26618) | Involving primary meta region in meta scan with CatalogReplicaLoadBalanceSimpleSelector | Minor | meta replicas |
| [HBASE-26637](https://issues.apache.org/jira/browse/HBASE-26637) | Add more information to release manager table in our ref guide | Major | community, documentation |
| [HBASE-26885](https://issues.apache.org/jira/browse/HBASE-26885) | The TRSP should not go on when it get a bogus server name from AM | Major | proc-v2 |
| [HBASE-26872](https://issues.apache.org/jira/browse/HBASE-26872) | Load rate calculator for cost functions should be more precise | Major | Balancer |
| [HBASE-26832](https://issues.apache.org/jira/browse/HBASE-26832) | Avoid repeated releasing of flushed wal entries in AsyncFSWAL#syncCompleted | Major | wal |
| [HBASE-26878](https://issues.apache.org/jira/browse/HBASE-26878) | TableInputFormatBase should cache RegionSizeCalculator | Minor | . |
| [HBASE-26175](https://issues.apache.org/jira/browse/HBASE-26175) | MetricsHBaseServer should record all kinds of Exceptions | Minor | metrics |
| [HBASE-26858](https://issues.apache.org/jira/browse/HBASE-26858) | Refactor TestMasterRegionOnTwoFileSystems to avoid dead loop | Major | test |
| [HBASE-26859](https://issues.apache.org/jira/browse/HBASE-26859) | Split TestSnapshotProcedure to several smaller tests | Minor | proc-v2, snapshots |
| [HBASE-26851](https://issues.apache.org/jira/browse/HBASE-26851) | [Documentation] Point out compatibility issues with WAL Compression and Replication in doc | Minor | documentation, Replication, wal |
| [HBASE-26833](https://issues.apache.org/jira/browse/HBASE-26833) | Avoid waiting to clear buffer usage of ReplicationSourceShipper when aborting the RS | Major | regionserver, Replication |
| [HBASE-26848](https://issues.apache.org/jira/browse/HBASE-26848) | Set java.io.tmpdir on mvn command when running jenkins job | Major | jenkins, test |
| [HBASE-26828](https://issues.apache.org/jira/browse/HBASE-26828) | Increase the concurrency when running UTs in pre commit job | Major | jenkins, test |
| [HBASE-26680](https://issues.apache.org/jira/browse/HBASE-26680) | Close and do not write trailer for the broken WAL writer | Major | wal |
| [HBASE-26720](https://issues.apache.org/jira/browse/HBASE-26720) | ExportSnapshot should validate the source snapshot before copying files | Major | snapshots |
| [HBASE-26275](https://issues.apache.org/jira/browse/HBASE-26275) | update error message when executing deleteall with ROWPREFIXFILTER in meta table | Minor | shell |
| [HBASE-26835](https://issues.apache.org/jira/browse/HBASE-26835) | Rewrite TestLruAdaptiveBlockCache to make it more stable | Major | test |
| [HBASE-26830](https://issues.apache.org/jira/browse/HBASE-26830) | Rewrite TestLruBlockCache to make it more stable | Major | test |
| [HBASE-26814](https://issues.apache.org/jira/browse/HBASE-26814) | Default StoreHotnessProtector to off, with logs to guide when to turn it on | Major | . |
| [HBASE-26784](https://issues.apache.org/jira/browse/HBASE-26784) | Use HIGH\_QOS for ResultScanner.close requests | Major | . |
| [HBASE-26552](https://issues.apache.org/jira/browse/HBASE-26552) | Introduce retry to logroller to avoid abort | Major | wal |
| [HBASE-26792](https://issues.apache.org/jira/browse/HBASE-26792) | Implement ScanInfo#toString | Minor | regionserver |
| [HBASE-26731](https://issues.apache.org/jira/browse/HBASE-26731) | Metrics for tracking of active scanners | Minor | . |
| [HBASE-26789](https://issues.apache.org/jira/browse/HBASE-26789) | Automatically add default security headers to http/rest if SSL enabled | Major | REST, UI |
| [HBASE-26723](https://issues.apache.org/jira/browse/HBASE-26723) | Switch to use log4j2.properties file to configure log4j2 | Major | logging |
| [HBASE-26765](https://issues.apache.org/jira/browse/HBASE-26765) | Minor refactor of async scanning code | Major | . |
| [HBASE-26659](https://issues.apache.org/jira/browse/HBASE-26659) | The ByteBuffer of metadata in RAMQueueEntry in BucketCache could be reused. | Major | BucketCache, Performance |
| [HBASE-26730](https://issues.apache.org/jira/browse/HBASE-26730) | Extend hbase shell 'status' command to support an option 'tasks' | Minor | Operability, shell |
| [HBASE-26709](https://issues.apache.org/jira/browse/HBASE-26709) | Ban the usage of junit 3 TestCase | Major | test |
| [HBASE-26702](https://issues.apache.org/jira/browse/HBASE-26702) | Make ageOfLastShip, ageOfLastApplied extend TimeHistogram instead of plain histogram. | Minor | metrics, Replication |
| [HBASE-26726](https://issues.apache.org/jira/browse/HBASE-26726) | Allow disable of region warmup before graceful move | Minor | master, Region Assignment |
| [HBASE-26657](https://issues.apache.org/jira/browse/HBASE-26657) | ProfileServlet should move the output location to hbase specific directory | Minor | . |
| [HBASE-26567](https://issues.apache.org/jira/browse/HBASE-26567) | Remove IndexType from ChunkCreator | Major | in-memory-compaction |
| [HBASE-26641](https://issues.apache.org/jira/browse/HBASE-26641) | Split TestMasterFailoverWithProcedures | Major | proc-v2, test |
| [HBASE-26629](https://issues.apache.org/jira/browse/HBASE-26629) | Add expiration for long time vacant scanners in Thrift2 | Major | Performance, Thrift |
| [HBASE-26635](https://issues.apache.org/jira/browse/HBASE-26635) | Optimize decodeNumeric in OrderedBytes | Major | Performance |
| [HBASE-26623](https://issues.apache.org/jira/browse/HBASE-26623) | Report CallDroppedException in exception metrics | Minor | IPC/RPC, metrics, rpc |
| [HBASE-26609](https://issues.apache.org/jira/browse/HBASE-26609) | Round the size to MB or KB at the end of calculation in HRegionServer.createRegionLoad | Major | regionserver |
| [HBASE-26598](https://issues.apache.org/jira/browse/HBASE-26598) | Fix excessive connections in MajorCompactor | Major | Compaction, tooling |
| [HBASE-23303](https://issues.apache.org/jira/browse/HBASE-23303) | Add security headers to REST server/info page | Major | REST |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26856](https://issues.apache.org/jira/browse/HBASE-26856) | BufferedDataBlockEncoder.OnheapDecodedCell value can get corrupted | Major | . |
| [HBASE-27106](https://issues.apache.org/jira/browse/HBASE-27106) | HBase site generation should use its own JRuby | Major | website |
| [HBASE-27097](https://issues.apache.org/jira/browse/HBASE-27097) | SimpleRpcServer is broken | Blocker | rpc |
| [HBASE-27103](https://issues.apache.org/jira/browse/HBASE-27103) | All MR UTs are broken because of ClassNotFound | Critical | hadoop3, test |
| [HBASE-27066](https://issues.apache.org/jira/browse/HBASE-27066) | The Region Visualizer display failed | Major | . |
| [HBASE-27092](https://issues.apache.org/jira/browse/HBASE-27092) | Regionserver table on Master UI is broken | Major | master |
| [HBASE-27038](https://issues.apache.org/jira/browse/HBASE-27038) | CellComparator should extend Serializable | Minor | . |
| [HBASE-27017](https://issues.apache.org/jira/browse/HBASE-27017) | MOB snapshot is broken when FileBased SFT is used | Major | mob |
| [HBASE-26985](https://issues.apache.org/jira/browse/HBASE-26985) | SecureBulkLoadManager will set wrong permission if umask too strict | Major | regionserver |
| [HBASE-27079](https://issues.apache.org/jira/browse/HBASE-27079) | Lower some DEBUG level logs in ReplicationSourceWALReader to TRACE | Minor | . |
| [HBASE-27067](https://issues.apache.org/jira/browse/HBASE-27067) | Upgrade pyjwt to version 2.4.0 or later for dev-support/git-jira-release-audit | Trivial | . |
| [HBASE-27068](https://issues.apache.org/jira/browse/HBASE-27068) | NPE occurs when the active master has not yet been elected | Major | . |
| [HBASE-27064](https://issues.apache.org/jira/browse/HBASE-27064) | CME in TestRegionNormalizerWorkQueue | Minor | test |
| [HBASE-27069](https://issues.apache.org/jira/browse/HBASE-27069) | Hbase SecureBulkload permission regression | Major | . |
| [HBASE-27065](https://issues.apache.org/jira/browse/HBASE-27065) | Build against Hadoop 3.3.3 | Major | build |
| [HBASE-26854](https://issues.apache.org/jira/browse/HBASE-26854) | Shell startup logs a bunch of noise | Major | . |
| [HBASE-27061](https://issues.apache.org/jira/browse/HBASE-27061) | two phase bulkload is broken when SFT is in use. | Major | . |
| [HBASE-27055](https://issues.apache.org/jira/browse/HBASE-27055) | Add additional comments when using HBASE\_TRACE\_OPTS with standalone mode | Minor | tracing |
| [HBASE-27030](https://issues.apache.org/jira/browse/HBASE-27030) | Fix undefined local variable error in draining\_servers.rb | Major | jruby, shell |
| [HBASE-27047](https://issues.apache.org/jira/browse/HBASE-27047) | Fix typo for metric drainingRegionServers | Minor | metrics |
| [HBASE-27027](https://issues.apache.org/jira/browse/HBASE-27027) | Deprecated jetty SslContextFactory cause HMaster startup failure due to multiple certificates in KeyStores | Major | security |
| [HBASE-27032](https://issues.apache.org/jira/browse/HBASE-27032) | The draining region servers metric description is incorrect | Minor | . |
| [HBASE-27019](https://issues.apache.org/jira/browse/HBASE-27019) | Minor compression performance improvements | Trivial | . |
| [HBASE-26905](https://issues.apache.org/jira/browse/HBASE-26905) | ReplicationPeerManager#checkPeerExists should throw ReplicationPeerNotFoundException if peer doesn't exists | Major | Replication |
| [HBASE-27021](https://issues.apache.org/jira/browse/HBASE-27021) | StoreFileInfo should set its initialPath in a consistent way | Major | . |
| [HBASE-27020](https://issues.apache.org/jira/browse/HBASE-27020) | Fix spotless warn for master branch | Minor | . |
| [HBASE-27015](https://issues.apache.org/jira/browse/HBASE-27015) | Fix log format for ServerManager | Minor | . |
| [HBASE-26994](https://issues.apache.org/jira/browse/HBASE-26994) | MasterFileSystem create directory without permission check | Major | master |
| [HBASE-26963](https://issues.apache.org/jira/browse/HBASE-26963) | ReplicationSource#removePeer hangs if we try to remove bad peer. | Major | regionserver, Replication |
| [HBASE-27000](https://issues.apache.org/jira/browse/HBASE-27000) | Block cache stats (Misses Caching) display error in RS web UI | Major | . |
| [HBASE-26984](https://issues.apache.org/jira/browse/HBASE-26984) | Chaos Monkey thread dies in ITBLL Chaos GracefulRollingRestartRsAction | Major | integration tests |
| [HBASE-26992](https://issues.apache.org/jira/browse/HBASE-26992) | Brotli compressor has unexpected behavior during reinitialization | Minor | . |
| [HBASE-26960](https://issues.apache.org/jira/browse/HBASE-26960) | Another case for unnecessary replication suspending in RegionReplicationSink | Major | read replicas |
| [HBASE-26988](https://issues.apache.org/jira/browse/HBASE-26988) | Balancer should reset to default setting for hbase.master.loadbalance.bytable if dynamically reloading configuration | Minor | Balancer |
| [HBASE-26917](https://issues.apache.org/jira/browse/HBASE-26917) | Do not add --threads when running 'mvn site' | Major | build, scripts |
| [HBASE-22349](https://issues.apache.org/jira/browse/HBASE-22349) | Stochastic Load Balancer skips balancing when node is replaced in cluster | Major | Balancer |
| [HBASE-26978](https://issues.apache.org/jira/browse/HBASE-26978) | Update inmemory\_compaction.adoc | Minor | documentation |
| [HBASE-26979](https://issues.apache.org/jira/browse/HBASE-26979) | StoreFileListFile logs frequent stacktraces at INFO level | Minor | . |
| [HBASE-26951](https://issues.apache.org/jira/browse/HBASE-26951) | HMaster should exit gracefully, when stopped via hbase-daemon.sh | Critical | master |
| [HBASE-26964](https://issues.apache.org/jira/browse/HBASE-26964) | Fix java import in admin.rb | Minor | shell |
| [HBASE-26941](https://issues.apache.org/jira/browse/HBASE-26941) | LocalHBaseCluster.waitOnRegionServer should not call join while interrupted | Critical | test |
| [HBASE-26938](https://issues.apache.org/jira/browse/HBASE-26938) | Compaction failures after StoreFileTracker integration | Blocker | Compaction |
| [HBASE-26944](https://issues.apache.org/jira/browse/HBASE-26944) | Possible resource leak while creating new region scanner | Major | . |
| [HBASE-26895](https://issues.apache.org/jira/browse/HBASE-26895) | on hbase shell, 'delete/deleteall' for a columnfamily is not working | Major | shell |
| [HBASE-26901](https://issues.apache.org/jira/browse/HBASE-26901) | delete with null columnQualifier occurs NullPointerException when NewVersionBehavior is on | Major | Deletes, Scanners |
| [HBASE-26880](https://issues.apache.org/jira/browse/HBASE-26880) | Misspelling commands in hbase shell will crash the shell | Minor | shell |
| [HBASE-26924](https://issues.apache.org/jira/browse/HBASE-26924) | [Documentation] Fix log parameter error and spelling error | Trivial | logging |
| [HBASE-26811](https://issues.apache.org/jira/browse/HBASE-26811) | Secondary replica may be disabled for read incorrectly forever | Major | read replicas |
| [HBASE-26838](https://issues.apache.org/jira/browse/HBASE-26838) | Junit jar is not included in the hbase tar ball, causing issues for some hbase tools that do rely on it | Major | integration tests, tooling |
| [HBASE-26896](https://issues.apache.org/jira/browse/HBASE-26896) | list\_quota\_snapshots fails with ERROR NameError: uninitialized constant Shell::Commands::ListQuotaSnapshots::TABLE | Major | shell |
| [HBASE-26718](https://issues.apache.org/jira/browse/HBASE-26718) | HFileArchiver can remove referenced StoreFiles from the archive | Major | Compaction, HFile, snapshots |
| [HBASE-26864](https://issues.apache.org/jira/browse/HBASE-26864) | SplitTableRegionProcedure calls openParentRegions() at a wrong state during rollback. | Major | Region Assignment |
| [HBASE-26810](https://issues.apache.org/jira/browse/HBASE-26810) | Add dynamic configuration support for system coprocessors | Major | conf, Coprocessors |
| [HBASE-26869](https://issues.apache.org/jira/browse/HBASE-26869) | RSRpcServices.scan should deep clone cells when RpcCallContext is null | Major | regionserver |
| [HBASE-26866](https://issues.apache.org/jira/browse/HBASE-26866) | Shutdown WAL may abort region server | Major | wal |
| [HBASE-26870](https://issues.apache.org/jira/browse/HBASE-26870) | Log4j2 integration is incorrect in nighly's client integration test | Critical | jenkins, logging |
| [HBASE-26840](https://issues.apache.org/jira/browse/HBASE-26840) | Fix NPE in the retry of logroller | Minor | wal |
| [HBASE-26831](https://issues.apache.org/jira/browse/HBASE-26831) | TestAdminShell2 is failing because of we referenced a deleted method | Major | shell |
| [HBASE-26670](https://issues.apache.org/jira/browse/HBASE-26670) | HFileLinkCleaner should be added even if snapshot is disabled | Critical | snapshots |
| [HBASE-26761](https://issues.apache.org/jira/browse/HBASE-26761) | TestMobStoreScanner (testGetMassive) can OOME | Minor | mob, test |
| [HBASE-26816](https://issues.apache.org/jira/browse/HBASE-26816) | Fix CME in ReplicationSourceManager | Minor | Replication |
| [HBASE-26821](https://issues.apache.org/jira/browse/HBASE-26821) | Bump dependencies in /dev-support/git-jira-release-audit | Minor | dependabot |
| [HBASE-26715](https://issues.apache.org/jira/browse/HBASE-26715) | Blocked on SyncFuture in AsyncProtobufLogWriter#write | Major | . |
| [HBASE-26815](https://issues.apache.org/jira/browse/HBASE-26815) | TestFanOutOneBlockAsyncDFSOutput is flakey | Major | test |
| [HBASE-26768](https://issues.apache.org/jira/browse/HBASE-26768) | Avoid unnecessary replication suspending in RegionReplicationSink | Major | read replicas |
| [HBASE-26805](https://issues.apache.org/jira/browse/HBASE-26805) | TestRegionHDFSBlockLocationFinder is flaky | Major | Balancer, test |
| [HBASE-26799](https://issues.apache.org/jira/browse/HBASE-26799) | TestCanaryTool.testWriteTableTimeout is flaky | Major | . |
| [HBASE-26777](https://issues.apache.org/jira/browse/HBASE-26777) | BufferedDataBlockEncoder$OffheapDecodedExtendedCell.deepClone throws UnsupportedOperationException | Major | regionserver |
| [HBASE-26787](https://issues.apache.org/jira/browse/HBASE-26787) | TestRegionReplicaReplicationError should inject error in replicateToReplica method | Major | test |
| [HBASE-26745](https://issues.apache.org/jira/browse/HBASE-26745) | MetricsStochasticBalancerSource metrics don't render in /jmx endpoint | Minor | . |
| [HBASE-26776](https://issues.apache.org/jira/browse/HBASE-26776) | RpcServer failure to SASL handshake always logs user "unknown" to audit log | Major | security |
| [HBASE-26772](https://issues.apache.org/jira/browse/HBASE-26772) | Shell suspended in background | Minor | shell |
| [HBASE-26767](https://issues.apache.org/jira/browse/HBASE-26767) | Rest server should not use a large Header Cache. | Major | REST |
| [HBASE-26546](https://issues.apache.org/jira/browse/HBASE-26546) | hbase-shaded-client missing required thirdparty classes under hadoop 3.3.1 | Major | Client, hadoop3, shading |
| [HBASE-26727](https://issues.apache.org/jira/browse/HBASE-26727) | Fix CallDroppedException reporting | Minor | . |
| [HBASE-26712](https://issues.apache.org/jira/browse/HBASE-26712) | Balancer encounters NPE in rare case | Major | . |
| [HBASE-26742](https://issues.apache.org/jira/browse/HBASE-26742) | Comparator of NOT\_EQUAL NULL is invalid for checkAndMutate | Major | . |
| [HBASE-26688](https://issues.apache.org/jira/browse/HBASE-26688) | Threads shared EMPTY\_RESULT may lead to unexpected client job down. | Major | Client |
| [HBASE-26755](https://issues.apache.org/jira/browse/HBASE-26755) | HBase website generation should show error details on failure | Major | website |
| [HBASE-26753](https://issues.apache.org/jira/browse/HBASE-26753) | RegionReplicationSink.send set timeout for replicating meta edits error | Major | . |
| [HBASE-26741](https://issues.apache.org/jira/browse/HBASE-26741) | Incorrect exception handling in shell | Critical | shell |
| [HBASE-26713](https://issues.apache.org/jira/browse/HBASE-26713) | Increments submitted by 1.x clients will be stored with timestamp 0 on 2.x+ clusters | Major | . |
| [HBASE-26679](https://issues.apache.org/jira/browse/HBASE-26679) | Wait on the future returned by FanOutOneBlockAsyncDFSOutput.flush would stuck | Critical | wal |
| [HBASE-26675](https://issues.apache.org/jira/browse/HBASE-26675) | Data race on Compactor.writer | Major | Compaction |
| [HBASE-26674](https://issues.apache.org/jira/browse/HBASE-26674) | Should modify filesCompacting under storeWriteLock | Major | Compaction |
| [HBASE-26662](https://issues.apache.org/jira/browse/HBASE-26662) | User.createUserForTesting should not reset UserProvider.groups every time if hbase.group.service.for.test.only is true | Major | . |
| [HBASE-26654](https://issues.apache.org/jira/browse/HBASE-26654) | ModifyTableDescriptorProcedure shoud load TableDescriptor while executing | Major | master, proc-v2 |
| [HBASE-26671](https://issues.apache.org/jira/browse/HBASE-26671) | Misspellings of hbck usage | Minor | hbck |
| [HBASE-26469](https://issues.apache.org/jira/browse/HBASE-26469) | correct HBase shell exit behavior to match code passed to exit | Critical | shell |
| [HBASE-26543](https://issues.apache.org/jira/browse/HBASE-26543) | correct parsing of hbase shell args with GetoptLong | Blocker | shell |
| [HBASE-26643](https://issues.apache.org/jira/browse/HBASE-26643) | LoadBalancer should not return empty map | Critical | proc-v2, Region Assignment, test |
| [HBASE-26646](https://issues.apache.org/jira/browse/HBASE-26646) | WALPlayer should obtain token from filesystem | Minor | . |
| [HBASE-26578](https://issues.apache.org/jira/browse/HBASE-26578) | CompactedHFilesDischarger should be shutdown when aborting regionserver | Major | master, regionserver |
| [HBASE-26494](https://issues.apache.org/jira/browse/HBASE-26494) | Using RefCnt to fix the flawed MemStoreLABImpl | Major | regionserver |
| [HBASE-26625](https://issues.apache.org/jira/browse/HBASE-26625) | ExportSnapshot tool failed to copy data files for tables with merge region | Minor | . |
| [HBASE-26615](https://issues.apache.org/jira/browse/HBASE-26615) | Snapshot referenced data files are deleted when delete a table with merge regions | Major | . |
| [HBASE-26613](https://issues.apache.org/jira/browse/HBASE-26613) | The logic of the method incrementIV in Encryption class has problem | Major | Performance, security |


### TESTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-27039](https://issues.apache.org/jira/browse/HBASE-27039) | Some methods of MasterRegion should be annotated for testing only | Minor | master |
| [HBASE-27054](https://issues.apache.org/jira/browse/HBASE-27054) | TestStochasticLoadBalancerRegionReplicaLargeCluster.testRegionReplicasOnLargeCluster is flaky | Major | test |
| [HBASE-27052](https://issues.apache.org/jira/browse/HBASE-27052) | TestAsyncTableScanner.testScanWrongColumnFamily is flaky | Major | test |
| [HBASE-27051](https://issues.apache.org/jira/browse/HBASE-27051) | TestReplicationSource.testReplicationSourceInitializingMetric is flaky | Minor | test |
| [HBASE-27050](https://issues.apache.org/jira/browse/HBASE-27050) | Support unit test pattern matching again | Minor | test |
| [HBASE-26989](https://issues.apache.org/jira/browse/HBASE-26989) | TestStochasticLoadBalancer has some slow methods, and inconsistent set, reset, unset of configuration | Minor | Balancer, test |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-27121](https://issues.apache.org/jira/browse/HBASE-27121) | Set version as 3.0.0-alpha-3 in master in prep for first RC of 3.0.0-alpha-3 | Major | build, pom |
| [HBASE-26167](https://issues.apache.org/jira/browse/HBASE-26167) | Allow users to not start zookeeper and dfs cluster when using TestingHBaseCluster | Major | test |
| [HBASE-26366](https://issues.apache.org/jira/browse/HBASE-26366) | Provide meaningful parent spans to ZK interactions | Major | tracing |
| [HBASE-15519](https://issues.apache.org/jira/browse/HBASE-15519) | Add per-user metrics | Major | metrics |
| [HBASE-27006](https://issues.apache.org/jira/browse/HBASE-27006) | cordon off large ci worker nodes | Major | . |
| [HBASE-26855](https://issues.apache.org/jira/browse/HBASE-26855) | Delete unnecessary dependency on jaxb-runtime jar | Major | . |
| [HBASE-27024](https://issues.apache.org/jira/browse/HBASE-27024) | The User API and Developer API links are broken on hbase.apache.org | Major | website |
| [HBASE-27045](https://issues.apache.org/jira/browse/HBASE-27045) | Disable TestClusterScopeQuotaThrottle | Major | test |
| [HBASE-26986](https://issues.apache.org/jira/browse/HBASE-26986) | Trace a one-shot execution of a Master procedure | Major | . |
| [HBASE-26999](https://issues.apache.org/jira/browse/HBASE-26999) | HStore should try write WAL compaction marker before replacing compacted files in StoreEngine | Major | . |
| [HBASE-26330](https://issues.apache.org/jira/browse/HBASE-26330) | Document new provided compression codecs | Blocker | . |
| [HBASE-26995](https://issues.apache.org/jira/browse/HBASE-26995) | Remove ref guide check in pre commit and nightly for branches other than master | Major | build, scripts |
| [HBASE-26931](https://issues.apache.org/jira/browse/HBASE-26931) | Add the information of EOL releases to our ref guide on master branch | Major | documentation |
| [HBASE-26648](https://issues.apache.org/jira/browse/HBASE-26648) | Improve fidelity of RegionLocator spans | Major | tracing |
| [HBASE-26899](https://issues.apache.org/jira/browse/HBASE-26899) | Run spotless:apply | Major | . |
| [HBASE-26932](https://issues.apache.org/jira/browse/HBASE-26932) | Skip generating ref guide when running 'mvn site' on branch other than master | Major | build, pom |
| [HBASE-25058](https://issues.apache.org/jira/browse/HBASE-25058) | Export necessary modules when running under JDK11 | Major | Performance, rpc |
| [HBASE-26928](https://issues.apache.org/jira/browse/HBASE-26928) | Fix several indentation problems | Major | . |
| [HBASE-26922](https://issues.apache.org/jira/browse/HBASE-26922) | Fix LineLength warnings as much as possible if it can not be fixed by spotless | Major | . |
| [HBASE-26929](https://issues.apache.org/jira/browse/HBASE-26929) | Upgrade surefire plugin to 3.0.0-M6 | Major | pom, test |
| [HBASE-26927](https://issues.apache.org/jira/browse/HBASE-26927) | Add snapshot scanner UT with SFT and some cleanups to TestTableSnapshotScanner | Major | . |
| [HBASE-26916](https://issues.apache.org/jira/browse/HBASE-26916) | Fix missing braces warnings in DefaultVisibilityExpressionResolver | Major | . |
| [HBASE-26919](https://issues.apache.org/jira/browse/HBASE-26919) | Rewrite the counting rows part in TestFromClientSide4 | Major | test |
| [HBASE-26920](https://issues.apache.org/jira/browse/HBASE-26920) | Fix missing braces warnings in TestProcedureMember | Major | test |
| [HBASE-26921](https://issues.apache.org/jira/browse/HBASE-26921) | Rewrite the counting cells part in TestMultiVersions | Major | test |
| [HBASE-26545](https://issues.apache.org/jira/browse/HBASE-26545) | Implement tracing of scan | Major | tracing |
| [HBASE-26531](https://issues.apache.org/jira/browse/HBASE-26531) | Trace coprocessor exec endpoints | Major | . |
| [HBASE-26791](https://issues.apache.org/jira/browse/HBASE-26791) | Memstore flush fencing issue for SFT | Major | HFile |
| [HBASE-26837](https://issues.apache.org/jira/browse/HBASE-26837) | Set SFT config when creating TableDescriptor in TestCloneSnapshotProcedure | Major | test |
| [HBASE-25896](https://issues.apache.org/jira/browse/HBASE-25896) | Implement a Region Visualization on Master WebUI | Major | . |
| [HBASE-26611](https://issues.apache.org/jira/browse/HBASE-26611) | Changing SFT implementation on disabled table is dangerous | Critical | HFile, proc-v2 |
| [HBASE-25895](https://issues.apache.org/jira/browse/HBASE-25895) | Implement a Cluster Metrics JSON endpoint | Major | . |
| [HBASE-26824](https://issues.apache.org/jira/browse/HBASE-26824) | TestHBaseTestingUtil.testResolvePortConflict failing after HBASE-26582 | Major | . |
| [HBASE-26582](https://issues.apache.org/jira/browse/HBASE-26582) | Prune use of Random and SecureRandom objects | Minor | . |
| [HBASE-26764](https://issues.apache.org/jira/browse/HBASE-26764) | Implement generic exception support for TraceUtil methods over Callables and Runnables | Major | . |
| [HBASE-26759](https://issues.apache.org/jira/browse/HBASE-26759) | Fix trace continuity through CallRunner | Major | . |
| [HBASE-26707](https://issues.apache.org/jira/browse/HBASE-26707) | Reduce number of renames during bulkload | Major | . |
| [HBASE-26640](https://issues.apache.org/jira/browse/HBASE-26640) | Reimplement master local region initialization to better work with SFT | Major | master, RegionProcedureStore |
| [HBASE-26673](https://issues.apache.org/jira/browse/HBASE-26673) | Implement a shell command for change SFT implementation | Major | shell |
| [HBASE-26434](https://issues.apache.org/jira/browse/HBASE-26434) | Compact L0 files for cold regions using StripeCompactionPolicy | Major | . |
| [HBASE-26749](https://issues.apache.org/jira/browse/HBASE-26749) | Migrate HBase main pre commit job to ci-hbase | Major | . |
| [HBASE-26697](https://issues.apache.org/jira/browse/HBASE-26697) | Migrate HBase Nightly HBase-Flaky-Tests and HBase-Find-Flaky-Tests to ci-hbase | Major | jenkins |
| [HBASE-26521](https://issues.apache.org/jira/browse/HBASE-26521) | Name RPC spans as \`$package.$service/$method\` | Major | . |
| [HBASE-26747](https://issues.apache.org/jira/browse/HBASE-26747) | Use python2 instead of python in our python scripts | Major | jenkins |
| [HBASE-26473](https://issues.apache.org/jira/browse/HBASE-26473) | Introduce \`db.hbase.container\_operations\` span attribute | Major | . |
| [HBASE-26587](https://issues.apache.org/jira/browse/HBASE-26587) | Introduce a new Admin API to change SFT implementation | Major | Admin, API |
| [HBASE-26690](https://issues.apache.org/jira/browse/HBASE-26690) | Modify FSTableDescriptors to not rely on renaming when writing TableDescriptor | Major | master |
| [HBASE-26711](https://issues.apache.org/jira/browse/HBASE-26711) | Remove 2.3 from Downloads page | Major | . |
| [HBASE-26700](https://issues.apache.org/jira/browse/HBASE-26700) | The way we bypass broken track file is not enough in StoreFileListFile | Critical | HFile |
| [HBASE-26474](https://issues.apache.org/jira/browse/HBASE-26474) | Implement connection-level attributes | Major | . |
| [HBASE-26520](https://issues.apache.org/jira/browse/HBASE-26520) | Remove use of \`db.hbase.namespace\` tracing attribute | Major | . |
| [HBASE-26661](https://issues.apache.org/jira/browse/HBASE-26661) | Remove deprecated methods in MasterObserver | Major | Coprocessors, master |
| [HBASE-26397](https://issues.apache.org/jira/browse/HBASE-26397) | Display the excluded datanodes on regionserver UI | Major | . |
| [HBASE-26586](https://issues.apache.org/jira/browse/HBASE-26586) | Should not rely on the global config when setting SFT implementation for a table while upgrading | Critical | HFile |
| [HBASE-26639](https://issues.apache.org/jira/browse/HBASE-26639) | The implementation of TestMergesSplitsAddToTracker is problematic | Major | test |
| [HBASE-26585](https://issues.apache.org/jira/browse/HBASE-26585) | Add SFT configuration to META table descriptor when creating META | Major | . |
| [HBASE-26621](https://issues.apache.org/jira/browse/HBASE-26621) | Set version as 3.0.0-alpha-3-SNAPSHOT in master | Major | build, pom |
| [HBASE-26079](https://issues.apache.org/jira/browse/HBASE-26079) | Use StoreFileTracker when splitting and merging | Major | proc-v2 |
| [HBASE-26620](https://issues.apache.org/jira/browse/HBASE-26620) | Add 3.0.0-alpha-2 to download page | Major | website |
| [HBASE-26487](https://issues.apache.org/jira/browse/HBASE-26487) | Run some tests to verify the new region replication framework | Major | integration tests, test |
| [HBASE-26540](https://issues.apache.org/jira/browse/HBASE-26540) | Implement a tool to verify the lag of region replication | Major | read replicas |
| [HBASE-26265](https://issues.apache.org/jira/browse/HBASE-26265) | Update ref guide to mention the new store file tracker implementations | Major | documentation |
| [HBASE-26286](https://issues.apache.org/jira/browse/HBASE-26286) | Add support for specifying store file tracker when restoring or cloning snapshot | Major | HFile, snapshots |
| [HBASE-26539](https://issues.apache.org/jira/browse/HBASE-26539) | The default rpc timeout 200ms is too small for replicating meta edits | Major | read replicas |
| [HBASE-26538](https://issues.apache.org/jira/browse/HBASE-26538) | Should find a way to clear the replication queue for a legacy region\_replica\_replication peer | Major | read replicas, Replication |
| [HBASE-26486](https://issues.apache.org/jira/browse/HBASE-26486) | Attach the new region replication framework design doc to git repo | Major | documentation |
| [HBASE-26478](https://issues.apache.org/jira/browse/HBASE-26478) | Update ref guide about the new region replication framework | Major | documentation |
| [HBASE-26481](https://issues.apache.org/jira/browse/HBASE-26481) | Consider rolling upgrading from old region replication framework | Major | read replicas |
| [HBASE-26417](https://issues.apache.org/jira/browse/HBASE-26417) | Remove NoopReplicationQueueStorage | Major | meta replicas, read replicas, Replication |
| [HBASE-26456](https://issues.apache.org/jira/browse/HBASE-26456) | Limit the size for one replicating | Major | read replicas |
| [HBASE-26416](https://issues.apache.org/jira/browse/HBASE-26416) | Implement a new method for region replication instead of using replay | Major | read replicas |
| [HBASE-26454](https://issues.apache.org/jira/browse/HBASE-26454) | CreateTableProcedure still relies on temp dir and renames when creating table FS layout | Major | . |
| [HBASE-26457](https://issues.apache.org/jira/browse/HBASE-26457) | Should not always clear all the failed replicas when getting a flush all request | Major | read replicas |
| [HBASE-26448](https://issues.apache.org/jira/browse/HBASE-26448) | Make sure we do not flush a region too frequently | Major | . |
| [HBASE-26449](https://issues.apache.org/jira/browse/HBASE-26449) | The way we add or clear failedReplicas may have race | Major | read replicas |
| [HBASE-26413](https://issues.apache.org/jira/browse/HBASE-26413) | Limit the total size of buffered region replication entries | Major | read replicas |
| [HBASE-26271](https://issues.apache.org/jira/browse/HBASE-26271) | Cleanup the broken store files under data directory | Major | HFile |
| [HBASE-26412](https://issues.apache.org/jira/browse/HBASE-26412) | Handle sink failure in RegionReplicationSink | Major | read replicas |
| [HBASE-26263](https://issues.apache.org/jira/browse/HBASE-26263) | [Rolling Upgrading] Persist the StoreFileTracker configurations to TableDescriptor for existing tables | Major | HFile, master |
| [HBASE-26407](https://issues.apache.org/jira/browse/HBASE-26407) | Introduce a region replication sink for sinking WAL edits to secondary replicas directly | Major | read replicas |
| [HBASE-26328](https://issues.apache.org/jira/browse/HBASE-26328) | Clone snapshot doesn't load reference files into FILE SFT impl | Major | HFile, snapshots |
| [HBASE-26386](https://issues.apache.org/jira/browse/HBASE-26386) | Refactor StoreFileTracker implementations to expose the set method | Major | HFile |
| [HBASE-26326](https://issues.apache.org/jira/browse/HBASE-26326) | CreateTableProcedure fails when FileBasedStoreFileTracker is set in global config | Major | . |
| [HBASE-26280](https://issues.apache.org/jira/browse/HBASE-26280) | Use store file tracker when snapshoting | Major | HFile, snapshots |
| [HBASE-26264](https://issues.apache.org/jira/browse/HBASE-26264) | Add more checks to prevent misconfiguration on store file tracker | Major | conf, HFile |
| [HBASE-26248](https://issues.apache.org/jira/browse/HBASE-26248) | Should find a suitable way to let users specify the store file tracker implementation | Major | HFile |
| [HBASE-26246](https://issues.apache.org/jira/browse/HBASE-26246) | Persist the StoreFileTracker configurations to TableDescriptor when creating table | Major | HFile, master |
| [HBASE-26224](https://issues.apache.org/jira/browse/HBASE-26224) | Introduce a MigrationStoreFileTracker to support migrating from different store file tracker implementations | Major | HFile |
| [HBASE-25988](https://issues.apache.org/jira/browse/HBASE-25988) | Store the store file list by a file | Major | HFile |
| [HBASE-26064](https://issues.apache.org/jira/browse/HBASE-26064) | Introduce a StoreFileTracker to abstract the store file tracking logic | Major | HFile |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-27037](https://issues.apache.org/jira/browse/HBASE-27037) | Display the region server state on the Web UI | Major | . |
| [HBASE-26067](https://issues.apache.org/jira/browse/HBASE-26067) | Change the way on how we track store file list | Major | HFile |
| [HBASE-26245](https://issues.apache.org/jira/browse/HBASE-26245) | Store region server list in master local region | Major | master, Zookeeper |
| [HBASE-26233](https://issues.apache.org/jira/browse/HBASE-26233) | The region replication framework should not be built upon the general replication framework | Major | read replicas |
| [HBASE-22953](https://issues.apache.org/jira/browse/HBASE-22953) | Supporting Hadoop 3.3.0 | Major | hadoop3 |
| [HBASE-26949](https://issues.apache.org/jira/browse/HBASE-26949) | Purge references to ports 60010 and 60030 from the book | Minor | documentation |
| [HBASE-27108](https://issues.apache.org/jira/browse/HBASE-27108) | Revert HBASE-25709 | Blocker | . |
| [HBASE-27102](https://issues.apache.org/jira/browse/HBASE-27102) | Vacate the .idea folder in order to simplify spotless configuration | Major | build |
| [HBASE-27023](https://issues.apache.org/jira/browse/HBASE-27023) | Add protobuf to NOTICE file | Major | . |
| [HBASE-27082](https://issues.apache.org/jira/browse/HBASE-27082) | Change the return value of RSGroupInfo.getServers from SortedSet to Set to keep compatibility | Blocker | rsgroup |
| [HBASE-26912](https://issues.apache.org/jira/browse/HBASE-26912) | Bump checkstyle from 8.28 to 8.29 | Minor | test |
| [HBASE-26523](https://issues.apache.org/jira/browse/HBASE-26523) | Upgrade hbase-thirdparty dependency to 4.0.1 | Blocker | thirdparty |
| [HBASE-26892](https://issues.apache.org/jira/browse/HBASE-26892) | Add spotless:check in our pre commit general check | Major | jenkins |
| [HBASE-26954](https://issues.apache.org/jira/browse/HBASE-26954) | Compilation of master vs hadoop-3.3.2 fails | Major | build, hadoop3 |
| [HBASE-26908](https://issues.apache.org/jira/browse/HBASE-26908) | Remove warnings from meta replicas feature references in the HBase book | Major | documentation |
| [HBASE-26903](https://issues.apache.org/jira/browse/HBASE-26903) | Bump httpclient from 4.5.3 to 4.5.13 | Minor | . |
| [HBASE-26902](https://issues.apache.org/jira/browse/HBASE-26902) | Bump bcprov-jdk15on from 1.60 to 1.67 | Minor | . |
| [HBASE-26834](https://issues.apache.org/jira/browse/HBASE-26834) | Adapt ConnectionRule for both sync and async connections | Major | test |
| [HBASE-26861](https://issues.apache.org/jira/browse/HBASE-26861) | Fix flaky TestSnapshotFromMaster.testSnapshotHFileArchiving | Major | snapshots, test |
| [HBASE-26822](https://issues.apache.org/jira/browse/HBASE-26822) | Revert the changes on hbase-daemon.sh after switching to log4j2 properties file | Major | logging, scripts |
| [HBASE-26819](https://issues.apache.org/jira/browse/HBASE-26819) | Minor code cleanup in and around RpcScheduler | Minor | IPC/RPC |
| [HBASE-26817](https://issues.apache.org/jira/browse/HBASE-26817) | Mark RpcExecutor as IA.LimitedPrivate COPROC and PHOENIX | Major | compatibility |
| [HBASE-26782](https://issues.apache.org/jira/browse/HBASE-26782) | Minor code cleanup in and around RpcExecutor | Minor | IPC/RPC |
| [HBASE-26760](https://issues.apache.org/jira/browse/HBASE-26760) | LICENSE handling should not allow non-aggregated "apache-2.0" | Minor | community |
| [HBASE-26803](https://issues.apache.org/jira/browse/HBASE-26803) | Ban reload4j and logback dependencies | Major | dependencies, logging, pom |
| [HBASE-26788](https://issues.apache.org/jira/browse/HBASE-26788) | Disable Checks API callback from test results in PRs | Major | build |
| [HBASE-26622](https://issues.apache.org/jira/browse/HBASE-26622) | Update to error-prone 2.10 | Major | . |
| [HBASE-26663](https://issues.apache.org/jira/browse/HBASE-26663) | Upgrade Maven Enforcer Plugin | Major | build |
| [HBASE-26714](https://issues.apache.org/jira/browse/HBASE-26714) | Introduce path configuration for system coprocessors | Major | Coprocessors |
| [HBASE-26614](https://issues.apache.org/jira/browse/HBASE-26614) | Refactor code related to "dump"ing ZK nodes | Major | Zookeeper |
| [HBASE-26551](https://issues.apache.org/jira/browse/HBASE-26551) | Add FastPath feature to HBase RWQueueRpcExecutor | Major | rpc, Scheduler |
| [HBASE-26616](https://issues.apache.org/jira/browse/HBASE-26616) | Refactor code related to ZooKeeper authentication | Major | Zookeeper |
| [HBASE-26006](https://issues.apache.org/jira/browse/HBASE-26006) | Update ref guide about the 2.4.x release line | Major | documentation |
| [HBASE-26632](https://issues.apache.org/jira/browse/HBASE-26632) | Should use downloads.apache.org for checksum, signature, changes.md and releasenote.md | Major | website |
| [HBASE-26631](https://issues.apache.org/jira/browse/HBASE-26631) | Upgrade junit to 4.13.2 | Major | security, test |
| [HBASE-26634](https://issues.apache.org/jira/browse/HBASE-26634) | Upgrade log4j to 2.17.1 | Major | logging, security |
| [HBASE-26636](https://issues.apache.org/jira/browse/HBASE-26636) | Update the ref guide upgrading section to mention that the master issue when upgrading to 2.3 | Major | documentation |
| [HBASE-26564](https://issues.apache.org/jira/browse/HBASE-26564) | Retire the method visitLogEntryBeforeWrite without RegionInfo in WALActionListner | Minor | wal |
| [HBASE-26566](https://issues.apache.org/jira/browse/HBASE-26566) | Optimize encodeNumeric in OrderedBytes | Major | Performance |


## Release 3.0.0-alpha-2 - Unreleased (as of 2021-12-19)



### NEW FEATURES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26284](https://issues.apache.org/jira/browse/HBASE-26284) | Add HBase Thrift API to get all table names along with whether it is enabled or not | Major | Thrift |
| [HBASE-6908](https://issues.apache.org/jira/browse/HBASE-6908) | Pluggable Call BlockingQueue for HBaseServer | Major | IPC/RPC |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26579](https://issues.apache.org/jira/browse/HBASE-26579) | Set storage policy of recovered edits when wal storage type is configured | Major | Recovery |
| [HBASE-26601](https://issues.apache.org/jira/browse/HBASE-26601) | maven-gpg-plugin failing with "Inappropriate ioctl for device" | Major | build |
| [HBASE-26554](https://issues.apache.org/jira/browse/HBASE-26554) | Introduce a new parameter in jmx servlet to exclude the specific mbean | Minor | metrics |
| [HBASE-25547](https://issues.apache.org/jira/browse/HBASE-25547) | Thread pools should release unused resources | Minor | master, regionserver |
| [HBASE-25799](https://issues.apache.org/jira/browse/HBASE-25799) | add clusterReadRequests and clusterWriteRequests jmx | Major | metrics |
| [HBASE-26526](https://issues.apache.org/jira/browse/HBASE-26526) | Introduce a timeout to shutdown of WAL | Major | wal |
| [HBASE-26525](https://issues.apache.org/jira/browse/HBASE-26525) | Use unique thread name for group WALs | Major | wal |
| [HBASE-26524](https://issues.apache.org/jira/browse/HBASE-26524) | Support remove coprocessor by class name via alter table command | Major | Coprocessors, shell |
| [HBASE-26517](https://issues.apache.org/jira/browse/HBASE-26517) | Add auth method information to AccessChecker audit log | Trivial | security |
| [HBASE-26512](https://issues.apache.org/jira/browse/HBASE-26512) | Make timestamp format configurable in HBase shell scan output | Major | shell |
| [HBASE-26485](https://issues.apache.org/jira/browse/HBASE-26485) | Introduce a method to clean restore directory after Snapshot Scan | Minor | snapshots |
| [HBASE-26479](https://issues.apache.org/jira/browse/HBASE-26479) | Print too slow/big scan's operation\_id in region server log | Minor | regionserver, scan |
| [HBASE-26475](https://issues.apache.org/jira/browse/HBASE-26475) | The flush and compact methods in HTU should skip processing secondary replicas | Major | test |
| [HBASE-26249](https://issues.apache.org/jira/browse/HBASE-26249) | Ameliorate compaction made by bulk-loading files | Major | . |
| [HBASE-26421](https://issues.apache.org/jira/browse/HBASE-26421) | Use HFileLink file to replace entire files reference when splitting | Major | . |
| [HBASE-26267](https://issues.apache.org/jira/browse/HBASE-26267) | Master initialization fails if Master Region WAL dir is missing | Major | master |
| [HBASE-26446](https://issues.apache.org/jira/browse/HBASE-26446) | CellCounter should report serialized cell size counts too | Minor | . |
| [HBASE-26432](https://issues.apache.org/jira/browse/HBASE-26432) | Add tracing support in hbase shell | Minor | shell, tracing |
| [HBASE-26337](https://issues.apache.org/jira/browse/HBASE-26337) | Optimization for weighted random generators | Major | Balancer |
| [HBASE-26439](https://issues.apache.org/jira/browse/HBASE-26439) | improve upgrading doc | Minor | documentation |
| [HBASE-26363](https://issues.apache.org/jira/browse/HBASE-26363) | OpenTelemetry configuration support for per-process service names | Major | tracing |
| [HBASE-26309](https://issues.apache.org/jira/browse/HBASE-26309) | Balancer tends to move regions to the server at the end of list | Major | Balancer |
| [HBASE-26348](https://issues.apache.org/jira/browse/HBASE-26348) | Implement a special procedure to migrate rs group information when upgrading | Major | proc-v2, rsgroup |
| [HBASE-26305](https://issues.apache.org/jira/browse/HBASE-26305) | Move NavigableSet add operation to writer thread in BucketCache | Minor | BucketCache, Performance |
| [HBASE-26251](https://issues.apache.org/jira/browse/HBASE-26251) | StochasticLoadBalancer metrics should update even if balancer doesn't run | Minor | Balancer |
| [HBASE-26270](https://issues.apache.org/jira/browse/HBASE-26270) | Provide getConfiguration method for Region and Store interface | Minor | . |
| [HBASE-26273](https://issues.apache.org/jira/browse/HBASE-26273) | TableSnapshotInputFormat/TableSnapshotInputFormatImpl should use ReadType.STREAM for scanning HFiles | Major | mapreduce |
| [HBASE-25891](https://issues.apache.org/jira/browse/HBASE-25891) | Remove dependence on storing WAL filenames for backup | Major | backup&restore |
| [HBASE-26276](https://issues.apache.org/jira/browse/HBASE-26276) | Allow HashTable/SyncTable to perform rawScan when comparing cells | Major | . |
| [HBASE-26255](https://issues.apache.org/jira/browse/HBASE-26255) | Add an option to use region location from meta table in TableSnapshotInputFormat | Major | mapreduce |
| [HBASE-26229](https://issues.apache.org/jira/browse/HBASE-26229) | Limit count and size of L0 files compaction in StripeCompactionPolicy | Major | Compaction |
| [HBASE-26243](https://issues.apache.org/jira/browse/HBASE-26243) | Fix typo for file 'hbase-server/src/main/java/org/apache/hadoop/hbase/util/HBaseFsck.java' | Trivial | . |
| [HBASE-26163](https://issues.apache.org/jira/browse/HBASE-26163) | Better logging in RSGroupInfoManagerImpl | Minor | logging, rsgroup |
| [HBASE-25773](https://issues.apache.org/jira/browse/HBASE-25773) | TestSnapshotScannerHDFSAclController.setupBeforeClass is flaky | Major | . |
| [HBASE-26147](https://issues.apache.org/jira/browse/HBASE-26147) | Add dry run mode to hbase balancer | Major | Balancer, master |
| [HBASE-25642](https://issues.apache.org/jira/browse/HBASE-25642) | Fix or stop warning about already cached block | Major | BlockCache, Operability, regionserver |
| [HBASE-26212](https://issues.apache.org/jira/browse/HBASE-26212) | Allow AuthUtil automatic renewal to be disabled | Minor | Client, security |
| [HBASE-26187](https://issues.apache.org/jira/browse/HBASE-26187) | Write straight into the store directory when Splitting and Merging | Major | . |
| [HBASE-26193](https://issues.apache.org/jira/browse/HBASE-26193) | Do not store meta region location as permanent state on zookeeper | Major | meta, Zookeeper |
| [HBASE-24842](https://issues.apache.org/jira/browse/HBASE-24842) | make export snapshot report size can be config | Minor | mapreduce |
| [HBASE-24652](https://issues.apache.org/jira/browse/HBASE-24652) | master-status UI make date type fields sortable | Minor | master, Operability, UI, Usability |
| [HBASE-26037](https://issues.apache.org/jira/browse/HBASE-26037) | Implement namespace and table level access control for thrift & thrift2 | Major | Admin, Thrift |
| [HBASE-25680](https://issues.apache.org/jira/browse/HBASE-25680) | Non-idempotent test in TestReplicationHFileCleaner | Minor | test |
| [HBASE-26179](https://issues.apache.org/jira/browse/HBASE-26179) | TestRequestTooBigException spends too much time to finish | Major | test |
| [HBASE-26160](https://issues.apache.org/jira/browse/HBASE-26160) | Configurable disallowlist for live editing of loglevels | Minor | . |
| [HBASE-25469](https://issues.apache.org/jira/browse/HBASE-25469) | Add detailed RIT info in JSON format for consumption as metrics | Minor | master |
| [HBASE-26153](https://issues.apache.org/jira/browse/HBASE-26153) | [create-release] Use cmd-line defined env vars | Trivial | RC |
| [HBASE-26154](https://issues.apache.org/jira/browse/HBASE-26154) | Provide exception metric for quota exceeded and throttling | Minor | . |
| [HBASE-26144](https://issues.apache.org/jira/browse/HBASE-26144) | The HStore.snapshot method is never called in main code | Major | regionserver |
| [HBASE-26105](https://issues.apache.org/jira/browse/HBASE-26105) | Rectify the expired TODO comment in CombinedBC | Trivial | BlockCache |
| [HBASE-26146](https://issues.apache.org/jira/browse/HBASE-26146) | Allow custom opts for hbck in hbase bin | Minor | . |
| [HBASE-26118](https://issues.apache.org/jira/browse/HBASE-26118) | The HStore.commitFile and HStore.moveFileIntoPlace almost have the same logic | Major | Compaction, regionserver |
| [HBASE-26119](https://issues.apache.org/jira/browse/HBASE-26119) | Polish TestAsyncNonMetaRegionLocator | Major | meta replicas, test |
| [HBASE-21946](https://issues.apache.org/jira/browse/HBASE-21946) | Use ByteBuffer pread instead of byte[] pread in HFileBlock when applicable | Critical | Offheaping |
| [HBASE-26108](https://issues.apache.org/jira/browse/HBASE-26108) | add option to disable scanMetrics in TableSnapshotInputFormat | Major | . |
| [HBASE-25986](https://issues.apache.org/jira/browse/HBASE-25986) | Expose the NORMALIZARION\_ENABLED table descriptor through a property in hbase-site | Minor | Normalizer |
| [HBASE-25700](https://issues.apache.org/jira/browse/HBASE-25700) | Enhance znode parent validation when add\_peer | Minor | Replication |
| [HBASE-26069](https://issues.apache.org/jira/browse/HBASE-26069) | Remove HStore.compactRecentForTestingAssumingDefaultPolicy and DefaultCompactor.compactForTesting | Major | Compaction, test |
| [HBASE-26065](https://issues.apache.org/jira/browse/HBASE-26065) | StripeStoreFileManager does not need to throw IOException for most methods | Major | Compaction, HFile |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26488](https://issues.apache.org/jira/browse/HBASE-26488) | Memory leak when MemStore retry flushing | Major | regionserver |
| [HBASE-26340](https://issues.apache.org/jira/browse/HBASE-26340) | TableSplit returns false size under 1MB | Major | mapreduce, regionserver |
| [HBASE-26550](https://issues.apache.org/jira/browse/HBASE-26550) | Make sure the master is running normally before accepting a balance command | Minor | Balancer, master |
| [HBASE-26557](https://issues.apache.org/jira/browse/HBASE-26557) | log4j2 has a critical RCE vulnerability | Major | logging, security |
| [HBASE-26541](https://issues.apache.org/jira/browse/HBASE-26541) | hbase-protocol-shaded not buildable on M1 MacOSX | Major | . |
| [HBASE-26527](https://issues.apache.org/jira/browse/HBASE-26527) | ArrayIndexOutOfBoundsException in KeyValueUtil.copyToNewKeyValue() | Major | wal |
| [HBASE-26462](https://issues.apache.org/jira/browse/HBASE-26462) | Should persist restoreAcl flag in the procedure state for CloneSnapshotProcedure and RestoreSnapshotProcedure | Critical | proc-v2, snapshots |
| [HBASE-26535](https://issues.apache.org/jira/browse/HBASE-26535) | [site, branch-2] DependencyManagement report is broken | Blocker | build, pom |
| [HBASE-26533](https://issues.apache.org/jira/browse/HBASE-26533) | KeyValueScanner might not be properly closed when using InternalScan.checkOnlyMemStore() | Minor | . |
| [HBASE-26482](https://issues.apache.org/jira/browse/HBASE-26482) | HMaster may clean wals that is replicating in rare cases | Critical | Replication |
| [HBASE-26468](https://issues.apache.org/jira/browse/HBASE-26468) | Region Server doesn't exit cleanly incase it crashes. | Major | regionserver |
| [HBASE-25905](https://issues.apache.org/jira/browse/HBASE-25905) | Shutdown of WAL stuck at waitForSafePoint | Blocker | regionserver, wal |
| [HBASE-26455](https://issues.apache.org/jira/browse/HBASE-26455) | TestStochasticLoadBalancerRegionReplicaWithRacks fails consistently | Major | Balancer |
| [HBASE-26450](https://issues.apache.org/jira/browse/HBASE-26450) | Server configuration will overwrite HStore configuration after using shell command 'update\_config' | Minor | Compaction, conf, regionserver |
| [HBASE-26476](https://issues.apache.org/jira/browse/HBASE-26476) | Make DefaultMemStore extensible for HStore.memstore | Major | regionserver |
| [HBASE-26465](https://issues.apache.org/jira/browse/HBASE-26465) | MemStoreLAB may be released early when its SegmentScanner is scanning | Critical | regionserver |
| [HBASE-26458](https://issues.apache.org/jira/browse/HBASE-26458) | Value of hbase.master.snapshot.ttl is not used | Minor | snapshots |
| [HBASE-26467](https://issues.apache.org/jira/browse/HBASE-26467) | Wrong Cell Generated by MemStoreLABImpl.forceCopyOfBigCellInto when Cell size bigger than data chunk size | Critical | in-memory-compaction |
| [HBASE-26463](https://issues.apache.org/jira/browse/HBASE-26463) | Unreadable table names after HBASE-24605 | Trivial | UI |
| [HBASE-26438](https://issues.apache.org/jira/browse/HBASE-26438) | Fix flaky test TestHStore.testCompactingMemStoreCellExceedInmemoryFlushSize | Major | test |
| [HBASE-26436](https://issues.apache.org/jira/browse/HBASE-26436) | check-aggregate-license error related to javadns after HADOOP-17317 | Major | build, hadoop3 |
| [HBASE-26311](https://issues.apache.org/jira/browse/HBASE-26311) | Balancer gets stuck in cohosted replica distribution | Major | Balancer |
| [HBASE-26384](https://issues.apache.org/jira/browse/HBASE-26384) | Segment already flushed to hfile may still be remained in CompactingMemStore | Major | in-memory-compaction |
| [HBASE-26414](https://issues.apache.org/jira/browse/HBASE-26414) | Tracing INSTRUMENTATION\_NAME is incorrect | Blocker | tracing |
| [HBASE-26410](https://issues.apache.org/jira/browse/HBASE-26410) | Fix HBase TestCanaryTool for Java17 | Major | java |
| [HBASE-26429](https://issues.apache.org/jira/browse/HBASE-26429) | HeapMemoryManager fails memstore flushes with NPE if enabled | Major | Operability, regionserver |
| [HBASE-25322](https://issues.apache.org/jira/browse/HBASE-25322) | Redundant Reference file in bottom region of split | Minor | . |
| [HBASE-26406](https://issues.apache.org/jira/browse/HBASE-26406) | Can not add peer replicating to non-HBase | Major | Replication |
| [HBASE-26398](https://issues.apache.org/jira/browse/HBASE-26398) | CellCounter fails for large tables filling up local disk | Minor | mapreduce |
| [HBASE-26190](https://issues.apache.org/jira/browse/HBASE-26190) | High rate logging of BucketAllocatorException: Allocation too big | Major | BucketCache, Operability |
| [HBASE-26392](https://issues.apache.org/jira/browse/HBASE-26392) | Update ClassSize.BYTE\_BUFFER for JDK17 | Major | java, util |
| [HBASE-26396](https://issues.apache.org/jira/browse/HBASE-26396) | Remove duplicate thread creation during migrating rsgroup | Minor | master, rsgroup |
| [HBASE-26394](https://issues.apache.org/jira/browse/HBASE-26394) | Cache in RSRpcServices.executeProcedures does not take effect | Major | . |
| [HBASE-26385](https://issues.apache.org/jira/browse/HBASE-26385) | Clear CellScanner when replay | Major | regionserver, rpc |
| [HBASE-26383](https://issues.apache.org/jira/browse/HBASE-26383) | HBCK incorrectly reports inconsistencies for recently split regions following a master failover | Critical | master |
| [HBASE-26371](https://issues.apache.org/jira/browse/HBASE-26371) | Prioritize meta region move over other region moves in region\_mover | Major | . |
| [HBASE-26361](https://issues.apache.org/jira/browse/HBASE-26361) | Enable OpenTelemetry to be used from developer sandbox | Major | tracing |
| [HBASE-26364](https://issues.apache.org/jira/browse/HBASE-26364) | TestThriftServer is failing 100% in our flaky test job | Major | test, Thrift |
| [HBASE-26350](https://issues.apache.org/jira/browse/HBASE-26350) | Missing server side debugging on failed SASL handshake | Minor | . |
| [HBASE-26344](https://issues.apache.org/jira/browse/HBASE-26344) | Fix Bug for MultiByteBuff.put(int, byte) | Major | . |
| [HBASE-26312](https://issues.apache.org/jira/browse/HBASE-26312) | Shell scan fails with timestamp | Major | shell, test |
| [HBASE-24601](https://issues.apache.org/jira/browse/HBASE-24601) | Change default Hfile storage policy from HOT to NONE for HDFS | Major | HFile |
| [HBASE-26295](https://issues.apache.org/jira/browse/HBASE-26295) | BucketCache could not free BucketEntry which restored from persistence file | Major | BucketCache |
| [HBASE-26289](https://issues.apache.org/jira/browse/HBASE-26289) | Hbase scan setMaxResultsPerColumnFamily not giving right results | Major | regionserver |
| [HBASE-26238](https://issues.apache.org/jira/browse/HBASE-26238) | OOME in VerifyReplication for the table contains rows with 10M+ cells | Major | Client, Replication |
| [HBASE-26297](https://issues.apache.org/jira/browse/HBASE-26297) | Balancer run is improperly triggered by accuracy error of double comparison | Major | Balancer |
| [HBASE-26178](https://issues.apache.org/jira/browse/HBASE-26178) | Improve data structure and algorithm for BalanceClusterState to improve computation speed for large cluster | Major | Balancer, Performance |
| [HBASE-26261](https://issues.apache.org/jira/browse/HBASE-26261) | Store configuration loss when use update\_config | Minor | . |
| [HBASE-26281](https://issues.apache.org/jira/browse/HBASE-26281) | DBB got from BucketCache would be freed unexpectedly before RPC completed | Critical | BucketCache |
| [HBASE-26197](https://issues.apache.org/jira/browse/HBASE-26197) | Fix some obvious bugs in MultiByteBuff.put | Major | . |
| [HBASE-26228](https://issues.apache.org/jira/browse/HBASE-26228) | updateRSGroupConfig operation should be authorized by AccessController | Major | acl, rsgroup |
| [HBASE-26106](https://issues.apache.org/jira/browse/HBASE-26106) | AbstractFSWALProvider#getArchivedLogPath doesn't look for wal file in all oldWALs directory. | Critical | wal |
| [HBASE-26205](https://issues.apache.org/jira/browse/HBASE-26205) | TableMRUtil#initCredentialsForCluster should use specified conf for UserProvider | Major | mapreduce |
| [HBASE-26210](https://issues.apache.org/jira/browse/HBASE-26210) | HBase Write should be doomed to hang when cell size exceeds InmemoryFlushSize for CompactingMemStore | Critical | in-memory-compaction |
| [HBASE-26244](https://issues.apache.org/jira/browse/HBASE-26244) | Avoid trim the error stack trace when running UT with maven | Major | . |
| [HBASE-25588](https://issues.apache.org/jira/browse/HBASE-25588) | Excessive logging of "hbase.zookeeper.useMulti is deprecated. Default to true always." | Minor | logging, Operability, Replication |
| [HBASE-26232](https://issues.apache.org/jira/browse/HBASE-26232) | SEEK\_NEXT\_USING\_HINT is ignored on reversed Scans | Critical | Filters, scan |
| [HBASE-26204](https://issues.apache.org/jira/browse/HBASE-26204) | VerifyReplication should obtain token for peerQuorumAddress too | Major | . |
| [HBASE-26219](https://issues.apache.org/jira/browse/HBASE-26219) | Negative time is logged while waiting on regionservers | Trivial | . |
| [HBASE-26184](https://issues.apache.org/jira/browse/HBASE-26184) | TestTableSnapshotScanner.testMergeRegion error message is misleading. | Minor | . |
| [HBASE-26087](https://issues.apache.org/jira/browse/HBASE-26087) | JVM crash when displaying RPC params by MonitoredRPCHandler | Major | UI |
| [HBASE-26200](https://issues.apache.org/jira/browse/HBASE-26200) | Undo 'HBASE-25165 Change 'State time' in UI so sorts (#2508)' in favor of HBASE-24652 | Major | UI |
| [HBASE-26196](https://issues.apache.org/jira/browse/HBASE-26196) | Support configuration override for remote cluster of HFileOutputFormat locality sensitive | Major | mapreduce |
| [HBASE-26026](https://issues.apache.org/jira/browse/HBASE-26026) | HBase Write may be stuck forever when using CompactingMemStore | Critical | in-memory-compaction |
| [HBASE-26176](https://issues.apache.org/jira/browse/HBASE-26176) | Correct regex in hbase-personality.sh | Minor | build |
| [HBASE-26170](https://issues.apache.org/jira/browse/HBASE-26170) | handleTooBigRequest in NettyRpcServer didn't skip enough bytes | Major | . |
| [HBASE-26142](https://issues.apache.org/jira/browse/HBASE-26142) | NullPointerException when set 'hbase.hregion.memstore.mslab.indexchunksize.percent' to zero | Critical | . |
| [HBASE-25651](https://issues.apache.org/jira/browse/HBASE-25651) | NORMALIZER\_TARGET\_REGION\_SIZE needs a unit in its name | Major | Normalizer |
| [HBASE-26166](https://issues.apache.org/jira/browse/HBASE-26166) | table list in master ui has a minor bug | Minor | UI |
| [HBASE-26107](https://issues.apache.org/jira/browse/HBASE-26107) | MOB compaction with missing files catches incorrect exception | Major | mob |
| [HBASE-24984](https://issues.apache.org/jira/browse/HBASE-24984) | WAL corruption due to early DBBs re-use when Durability.ASYNC\_WAL is used with multi operation | Critical | rpc, wal |
| [HBASE-25973](https://issues.apache.org/jira/browse/HBASE-25973) | Balancer should explain progress in a better way in log | Major | Balancer |
| [HBASE-26083](https://issues.apache.org/jira/browse/HBASE-26083) | L1 miss metric is incorrect when using CombinedBlockCache | Minor | BlockCache |
| [HBASE-26068](https://issues.apache.org/jira/browse/HBASE-26068) | The last assertion in TestHStore.testRefreshStoreFilesNotChanged is wrong | Major | test |


### TESTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26542](https://issues.apache.org/jira/browse/HBASE-26542) | Apply a \`package\` to test protobuf files | Minor | Protobufs, test |
| [HBASE-26349](https://issues.apache.org/jira/browse/HBASE-26349) | Improve recent change to IntegrationTestLoadCommonCrawl | Minor | integration tests, test |
| [HBASE-26335](https://issues.apache.org/jira/browse/HBASE-26335) | Minor improvements to IntegrationTestLoadCommonCrawl | Minor | integration tests, test |
| [HBASE-26185](https://issues.apache.org/jira/browse/HBASE-26185) | Fix TestMaster#testMoveRegionWhenNotInitialized with hbase.min.version.move.system.tables | Minor | . |


### SUB-TASKS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26472](https://issues.apache.org/jira/browse/HBASE-26472) | Adhere to semantic conventions regarding table data operations | Major | . |
| [HBASE-26572](https://issues.apache.org/jira/browse/HBASE-26572) | Upgrade to log4j 2.16.0 | Major | dependencies |
| [HBASE-26558](https://issues.apache.org/jira/browse/HBASE-26558) | Set version as 3.0.0-alpha-2 in master in prep for first RC of 3.0.0-alpha-2 | Major | build, pom |
| [HBASE-26304](https://issues.apache.org/jira/browse/HBASE-26304) | Reflect out-of-band locality improvements in served requests | Major | . |
| [HBASE-26471](https://issues.apache.org/jira/browse/HBASE-26471) | Move tracing semantic attributes to their own class | Major | . |
| [HBASE-26403](https://issues.apache.org/jira/browse/HBASE-26403) | Remove 1.4.x from our download page | Major | website |
| [HBASE-26327](https://issues.apache.org/jira/browse/HBASE-26327) | Replicas cohosted on a rack shouldn't keep triggering Balancer | Major | Balancer |
| [HBASE-26308](https://issues.apache.org/jira/browse/HBASE-26308) | Sum of multiplier of cost functions is not populated properly when we have a shortcut for trigger | Critical | Balancer |
| [HBASE-26430](https://issues.apache.org/jira/browse/HBASE-26430) | Increase DefaultHeapMemoryTuner log level | Minor | regionserver |
| [HBASE-26402](https://issues.apache.org/jira/browse/HBASE-26402) | Remove branch-1.4 from compatibility matrix and release manager section in our ref guide | Major | documentation |
| [HBASE-26353](https://issues.apache.org/jira/browse/HBASE-26353) | Support loadable dictionaries in hbase-compression-zstd | Minor | . |
| [HBASE-26319](https://issues.apache.org/jira/browse/HBASE-26319) | Make flaky find job track more builds | Major | flakies, jenkins |
| [HBASE-26395](https://issues.apache.org/jira/browse/HBASE-26395) | Add 1.4.14 to download page | Major | website |
| [HBASE-26390](https://issues.apache.org/jira/browse/HBASE-26390) | Upload src tarball to nightlies for nightly jobs | Major | jenkins, scripts |
| [HBASE-26382](https://issues.apache.org/jira/browse/HBASE-26382) | Use gen\_redirect\_html for linking flaky test logs | Major | jenkins, scripts, test |
| [HBASE-26362](https://issues.apache.org/jira/browse/HBASE-26362) | Upload mvn site artifacts for nightly build to nightlies | Major | jenkins, scripts |
| [HBASE-26380](https://issues.apache.org/jira/browse/HBASE-26380) | Add 2.3.7 to downloads page | Major | website |
| [HBASE-26316](https://issues.apache.org/jira/browse/HBASE-26316) | Per-table or per-CF compression codec setting overrides | Minor | HFile, Operability |
| [HBASE-26360](https://issues.apache.org/jira/browse/HBASE-26360) | Use gen\_redirect\_html for linking test logs | Major | jenkins, scripts |
| [HBASE-26341](https://issues.apache.org/jira/browse/HBASE-26341) | Upload dashboard html for flaky find job to nightlies | Major | flakies, jenkins, scripts |
| [HBASE-26339](https://issues.apache.org/jira/browse/HBASE-26339) | SshPublisher will skip uploading artifacts if the build is failure | Major | jenkins, scripts |
| [HBASE-26324](https://issues.apache.org/jira/browse/HBASE-26324) | Reuse compressors and decompressors in WAL CompressionContext | Minor | wal |
| [HBASE-26317](https://issues.apache.org/jira/browse/HBASE-26317) | Publish the test logs for pre commit jenkins job to nightlies | Major | jenkins, scripts |
| [HBASE-26313](https://issues.apache.org/jira/browse/HBASE-26313) | Publish the test logs for our nightly jobs to nightlies.apache.org | Major | jenkins, scripts |
| [HBASE-26318](https://issues.apache.org/jira/browse/HBASE-26318) | Publish test logs for flaky jobs to nightlies | Major | flakies, jenkins |
| [HBASE-26259](https://issues.apache.org/jira/browse/HBASE-26259) | Fallback support to pure Java compression | Major | Performance |
| [HBASE-26220](https://issues.apache.org/jira/browse/HBASE-26220) | Use P2P communicate between region servers to sync the list for bootstrap node | Major | master, regionserver |
| [HBASE-26293](https://issues.apache.org/jira/browse/HBASE-26293) | Use reservoir sampling when selecting bootstrap nodes | Major | master, regionserver |
| [HBASE-25288](https://issues.apache.org/jira/browse/HBASE-25288) | Make MasterRpcServices not extends RSRpcServices and also HMaster not extends HRegionServer | Major | master, rpc |
| [HBASE-26277](https://issues.apache.org/jira/browse/HBASE-26277) | Revert 26240, Apply InterfaceAudience.Private to BalanceResponse$Builder | Minor | . |
| [HBASE-26240](https://issues.apache.org/jira/browse/HBASE-26240) | Set BalanceRequest$Builder to InterfaceAudience.Private | Trivial | . |
| [HBASE-26237](https://issues.apache.org/jira/browse/HBASE-26237) | Improve computation complexity for primaryRegionCountSkewCostFunctio | Minor | Balancer |
| [HBASE-26230](https://issues.apache.org/jira/browse/HBASE-26230) | Start an in process HRegionServer in maintenance mode | Major | master |
| [HBASE-26157](https://issues.apache.org/jira/browse/HBASE-26157) | Expose some IA.LimitedPrivate interface in TestingHBaseCluster | Major | API, test |
| [HBASE-26103](https://issues.apache.org/jira/browse/HBASE-26103) | conn.getBufferedMutator(tableName) leaks thread executors and other problems (for master branch) | Major | Client |
| [HBASE-26235](https://issues.apache.org/jira/browse/HBASE-26235) | We could start RegionServerTracker before becoming active master | Major | master, Zookeeper |
| [HBASE-26216](https://issues.apache.org/jira/browse/HBASE-26216) | Move HRegionServer.abort(String) to Abortable as a default method | Major | API, regionserver |
| [HBASE-26189](https://issues.apache.org/jira/browse/HBASE-26189) | Reduce log level of CompactionProgress notice to DEBUG | Minor | Compaction |
| [HBASE-26227](https://issues.apache.org/jira/browse/HBASE-26227) | Forward port HBASE-26223 test code to branch-2.4+ | Major | test |
| [HBASE-26214](https://issues.apache.org/jira/browse/HBASE-26214) | Introduce a ConnectionRegistryEndpoint interface | Major | master, regionserver |
| [HBASE-26180](https://issues.apache.org/jira/browse/HBASE-26180) | Introduce a initial refresh interval for RpcConnectionRegistry | Major | Client |
| [HBASE-26213](https://issues.apache.org/jira/browse/HBASE-26213) | Refactor AnnotationReadingPriorityFunction | Major | master, regionserver, rpc |
| [HBASE-26215](https://issues.apache.org/jira/browse/HBASE-26215) | The backup master status page should use ActiveMasterManager instead of MasterAddressTracker | Major | master, UI |
| [HBASE-26173](https://issues.apache.org/jira/browse/HBASE-26173) | Return only a sub set of region servers as bootstrap nodes | Major | Client |
| [HBASE-26182](https://issues.apache.org/jira/browse/HBASE-26182) | Allow disabling refresh of connection registry endpoint | Major | Client |
| [HBASE-26181](https://issues.apache.org/jira/browse/HBASE-26181) | Region server and master could use itself as ConnectionRegistry | Major | master, regionserver |
| [HBASE-26174](https://issues.apache.org/jira/browse/HBASE-26174) | Make rpc connection registry the default registry on 3.0.0 | Major | Client |
| [HBASE-26172](https://issues.apache.org/jira/browse/HBASE-26172) | Deprecate MasterRegistry | Major | Client |
| [HBASE-26150](https://issues.apache.org/jira/browse/HBASE-26150) | Let region server also carry ClientMetaService | Major | Client, meta |
| [HBASE-26151](https://issues.apache.org/jira/browse/HBASE-26151) | Reimplement MasterAddressTracker to also cache backup master addresses | Major | Client, Zookeeper |
| [HBASE-26098](https://issues.apache.org/jira/browse/HBASE-26098) | Support passing a customized Configuration object when creating TestingHBaseCluster | Major | API, test |
| [HBASE-26096](https://issues.apache.org/jira/browse/HBASE-26096) | Cleanup the deprecated methods in HBTU related classes and format code | Major | test |
| [HBASE-26049](https://issues.apache.org/jira/browse/HBASE-26049) | Remove DfsBuilderUtility | Major | . |
| [HBASE-26091](https://issues.apache.org/jira/browse/HBASE-26091) | Remove FirstKeyValueMatchingQualifiersFilter | Major | Client |
| [HBASE-26093](https://issues.apache.org/jira/browse/HBASE-26093) | Replication is stuck due to zero length wal file in oldWALs directory [master/branch-2] | Major | . |
| [HBASE-24734](https://issues.apache.org/jira/browse/HBASE-24734) | RegionInfo#containsRange should support check meta table | Major | HFile, MTTR |
| [HBASE-26100](https://issues.apache.org/jira/browse/HBASE-26100) | Set version as 3.0.0-alpha-2-SNAPSHOT in master | Major | build, pom |
| [HBASE-26099](https://issues.apache.org/jira/browse/HBASE-26099) | Add 3.0.0-alpha-1 to download page | Major | website |
| [HBASE-26081](https://issues.apache.org/jira/browse/HBASE-26081) | Copy HBTU to hbase-testing-util, rename the HBTU related classes in hbase-server and mark them as IA.LimitedPrivate | Major | API, test |
| [HBASE-25739](https://issues.apache.org/jira/browse/HBASE-25739) | TableSkewCostFunction need to use aggregated deviation | Major | Balancer, master |
| [HBASE-26090](https://issues.apache.org/jira/browse/HBASE-26090) | Remove the deprecated methods in Scan which should be removed in 3.0.0 | Major | API, Client, scan |
| [HBASE-26082](https://issues.apache.org/jira/browse/HBASE-26082) | Mark LocalHBaseCluster as IA.Private | Major | API, test |
| [HBASE-26080](https://issues.apache.org/jira/browse/HBASE-26080) | Implement a new mini cluster class for end users | Major | API, test |
| [HBASE-25516](https://issues.apache.org/jira/browse/HBASE-25516) | [JDK17] reflective access Field.class.getDeclaredField("modifiers") not supported | Major | Filesystem Integration |


### OTHER:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-26606](https://issues.apache.org/jira/browse/HBASE-26606) | Upgrade log4j2 to 2.17.0 | Major | logging, security |
| [HBASE-26580](https://issues.apache.org/jira/browse/HBASE-26580) | The message of StoreTooBusy is confused | Trivial | logging, regionserver |
| [HBASE-26549](https://issues.apache.org/jira/browse/HBASE-26549) | hbaseprotoc plugin should initialize maven | Major | jenkins |
| [HBASE-26529](https://issues.apache.org/jira/browse/HBASE-26529) | Document HBASE-26524 to section of Dynamic Unloading | Minor | Coprocessors, shell |
| [HBASE-26490](https://issues.apache.org/jira/browse/HBASE-26490) | Add builder for class ReplicationLoadSink | Minor | Client |
| [HBASE-26484](https://issues.apache.org/jira/browse/HBASE-26484) | Update vote.tmpl in our create-release scripts to link KEYS from downloads.a.o instead of dist.a.o | Major | community |
| [HBASE-26444](https://issues.apache.org/jira/browse/HBASE-26444) | BucketCacheWriter should log only the BucketAllocatorException message, not the full stack trace | Major | logging, Operability |
| [HBASE-26443](https://issues.apache.org/jira/browse/HBASE-26443) | Some BaseLoadBalancer log lines should be at DEBUG level | Major | logging, Operability |
| [HBASE-26426](https://issues.apache.org/jira/browse/HBASE-26426) | Remove 'Review Board' section from the site | Major | website |
| [HBASE-26431](https://issues.apache.org/jira/browse/HBASE-26431) | Add hadoop 3.3.x to our hadoop version support matrix | Major | documentation, hadoop3 |
| [HBASE-26428](https://issues.apache.org/jira/browse/HBASE-26428) | Add hadoop 2.10.1, 3.2.2 and 3.3.1 to our hadoop checks | Major | jenkins, test |
| [HBASE-26427](https://issues.apache.org/jira/browse/HBASE-26427) | Modify download page to mention that 2.4.x is the stable release line | Major | website |
| [HBASE-26369](https://issues.apache.org/jira/browse/HBASE-26369) | Fix checkstyle issues for HBase-common: KeyValue and ByteBufferUtils | Trivial | . |
| [HBASE-26368](https://issues.apache.org/jira/browse/HBASE-26368) | Fix checkstyle issues for HRegionserver | Trivial | . |
| [HBASE-26359](https://issues.apache.org/jira/browse/HBASE-26359) | Loosen Dockerfile pinned package versions for \`create-release/mac-sshd-gpg-agent/Dockerfile\` | Major | build, community |
| [HBASE-26345](https://issues.apache.org/jira/browse/HBASE-26345) | Design doc for HBase NamedQueue framework | Major | . |
| [HBASE-26329](https://issues.apache.org/jira/browse/HBASE-26329) | Upgrade commons-io to 2.11.0 | Major | dependencies |
| [HBASE-26186](https://issues.apache.org/jira/browse/HBASE-26186) | jenkins script for caching artifacts should verify cached file before relying on it | Major | build, integration tests |
| [HBASE-26321](https://issues.apache.org/jira/browse/HBASE-26321) | Post blog to hbase.apache.org on SCR cache sizing | Major | . |
| [HBASE-26288](https://issues.apache.org/jira/browse/HBASE-26288) | Revisit the usage of MetaTableLocator when HRegionServer.TEST\_SKIP\_REPORTING\_TRANSITION is true | Major | meta, regionserver, test, Zookeeper |
| [HBASE-26285](https://issues.apache.org/jira/browse/HBASE-26285) | Remove MetaTableLocator usages in non-migration code | Major | meta, Zookeeper |
| [HBASE-26282](https://issues.apache.org/jira/browse/HBASE-26282) | Update downloads.xml for release 2.4.6 | Minor | website |
| [HBASE-26165](https://issues.apache.org/jira/browse/HBASE-26165) | 2.3.5 listed on website downloads page but row intends to be for 2.3.6 | Trivial | website |
| [HBASE-25521](https://issues.apache.org/jira/browse/HBASE-25521) | Change ChoreService and ScheduledChore to IA.Private | Major | util |


## Release 3.0.0-alpha-1 - Unreleased (as of 2021-07-04)



### IMPORTANT ISSUES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-19848](https://issues.apache.org/jira/browse/HBASE-19848) | Zookeeper thread leaks in hbase-spark bulkLoad method | Major | spark, Zookeeper |


### NEW FEATURES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-25841](https://issues.apache.org/jira/browse/HBASE-25841) | Add basic jshell support | Minor | shell, Usability |
| [HBASE-22120](https://issues.apache.org/jira/browse/HBASE-22120) | Replace HTrace with OpenTelemetry | Major | tracing |
| [HBASE-25756](https://issues.apache.org/jira/browse/HBASE-25756) | Support alternate compression for major and minor compactions | Minor | Compaction |
| [HBASE-25751](https://issues.apache.org/jira/browse/HBASE-25751) | Add writable TimeToPurgeDeletes to ScanOptions | Major | . |
| [HBASE-25665](https://issues.apache.org/jira/browse/HBASE-25665) | Disable reverse DNS lookup for SASL Kerberos client connection | Major | . |
| [HBASE-25587](https://issues.apache.org/jira/browse/HBASE-25587) | [hbck2] Schedule SCP for all unknown servers | Major | hbase-operator-tools, hbck2 |
| [HBASE-25460](https://issues.apache.org/jira/browse/HBASE-25460) | Expose drainingServers as cluster metric | Major | metrics |
| [HBASE-25496](https://issues.apache.org/jira/browse/HBASE-25496) | add get\_namespace\_rsgroup command | Major | . |
| [HBASE-24620](https://issues.apache.org/jira/browse/HBASE-24620) | Add a ClusterManager which submits command to ZooKeeper and its Agent which picks and execute those Commands. | Major | integration tests |
| [HBASE-25242](https://issues.apache.org/jira/browse/HBASE-25242) | Add Increment/Append support to RowMutations | Critical | Client, regionserver |
| [HBASE-25278](https://issues.apache.org/jira/browse/HBASE-25278) | Add option to toggle CACHE\_BLOCKS in count.rb | Minor | shell |
| [HBASE-18070](https://issues.apache.org/jira/browse/HBASE-18070) | Enable memstore replication for meta replica | Critical | . |
| [HBASE-24528](https://issues.apache.org/jira/browse/HBASE-24528) | Improve balancer decision observability | Major | Admin, Balancer, Operability, shell, UI |
| [HBASE-24776](https://issues.apache.org/jira/browse/HBASE-24776) | [hbtop] Support Batch mode | Major | hbtop |
| [HBASE-24602](https://issues.apache.org/jira/browse/HBASE-24602) | Add Increment and Append support to CheckAndMutate | Major | . |
| [HBASE-24760](https://issues.apache.org/jira/browse/HBASE-24760) | Add a config hbase.rsgroup.fallback.enable for RSGroup fallback feature | Major | rsgroup |
| [HBASE-24694](https://issues.apache.org/jira/browse/HBASE-24694) | Support flush a single column family of table | Major | . |
| [HBASE-24289](https://issues.apache.org/jira/browse/HBASE-24289) | Heterogeneous Storage for Date Tiered Compaction | Major | Compaction |
| [HBASE-24038](https://issues.apache.org/jira/browse/HBASE-24038) | Add a metric to show the locality of ssd in table.jsp | Major | metrics |
| [HBASE-8458](https://issues.apache.org/jira/browse/HBASE-8458) | Support for batch version of checkAndMutate() | Major | Client, regionserver |
| [HBASE-18659](https://issues.apache.org/jira/browse/HBASE-18659) | Use HDFS ACL to give user the ability to read snapshot directly on HDFS | Major | . |
| [HBASE-24260](https://issues.apache.org/jira/browse/HBASE-24260) | Add a ClusterManager that issues commands via coprocessor | Major | integration tests |
| [HBASE-24267](https://issues.apache.org/jira/browse/HBASE-24267) | Add limit support for scan in rest api | Major | REST |
| [HBASE-22749](https://issues.apache.org/jira/browse/HBASE-22749) | Distributed MOB compactions | Major | mob |
| [HBASE-22285](https://issues.apache.org/jira/browse/HBASE-22285) | A normalizer which merges very small size regions with adjacent regions.(MergeToNormalize) | Minor | master, Normalizer |
| [HBASE-22978](https://issues.apache.org/jira/browse/HBASE-22978) | Online slow response log | Minor | Admin, Operability, regionserver, shell |
| [HBASE-23146](https://issues.apache.org/jira/browse/HBASE-23146) | Support CheckAndMutate with multiple conditions | Major | . |
| [HBASE-18095](https://issues.apache.org/jira/browse/HBASE-18095) | Provide an option for clients to find the server hosting META that does not involve the ZooKeeper client | Major | Client |
| [HBASE-23710](https://issues.apache.org/jira/browse/HBASE-23710) | Priority configuration for system coprocessors | Major | Coprocessors |
| [HBASE-23653](https://issues.apache.org/jira/browse/HBASE-23653) | Expose content of meta table in web ui | Minor | master, Operability, UI |
| [HBASE-23073](https://issues.apache.org/jira/browse/HBASE-23073) | Add an optional costFunction to balance regions according to a capacity rule | Minor | master |
| [HBASE-22280](https://issues.apache.org/jira/browse/HBASE-22280) | Separate read/write handler for priority request(especially for meta). | Major | Scheduler |
| [HBASE-22969](https://issues.apache.org/jira/browse/HBASE-22969) | A new binary component comparator(BinaryComponentComparator) to perform comparison of arbitrary length and position | Minor | Filters |
| [HBASE-23223](https://issues.apache.org/jira/browse/HBASE-23223) | Support the offsetLock of bucketCache to use strong reference | Major | BucketCache |
| [HBASE-21874](https://issues.apache.org/jira/browse/HBASE-21874) | Bucket cache on Persistent memory | Major | BucketCache |
| [HBASE-11062](https://issues.apache.org/jira/browse/HBASE-11062) | hbtop | Major | hbtop |
| [HBASE-22623](https://issues.apache.org/jira/browse/HBASE-22623) | Add RegionObserver coprocessor hook for preWALAppend | Major | . |
| [HBASE-15666](https://issues.apache.org/jira/browse/HBASE-15666) | shaded dependencies for hbase-testing-util | Critical | test |
| [HBASE-22313](https://issues.apache.org/jira/browse/HBASE-22313) | Add a method to FsDelegationToken to accept token kind | Minor | security |
| [HBASE-22648](https://issues.apache.org/jira/browse/HBASE-22648) | Snapshot TTL | Minor | snapshots |
| [HBASE-22622](https://issues.apache.org/jira/browse/HBASE-22622) | WALKey Extended Attributes | Major | wal |
| [HBASE-22148](https://issues.apache.org/jira/browse/HBASE-22148) | Provide an alternative to CellUtil.setTimestamp | Blocker | API, Coprocessors |
| [HBASE-21815](https://issues.apache.org/jira/browse/HBASE-21815) | Make isTrackingMetrics and getMetrics of ScannerContext public | Minor | . |
| [HBASE-21926](https://issues.apache.org/jira/browse/HBASE-21926) | Profiler servlet | Major | master, Operability, regionserver |
| [HBASE-20886](https://issues.apache.org/jira/browse/HBASE-20886) | [Auth] Support keytab login in hbase client | Critical | asyncclient, Client, security |
| [HBASE-17942](https://issues.apache.org/jira/browse/HBASE-17942) | Disable region splits and merges per table | Major | . |
| [HBASE-21753](https://issues.apache.org/jira/browse/HBASE-21753) | Support getting the locations for all the replicas of a region | Major | Client |
| [HBASE-20727](https://issues.apache.org/jira/browse/HBASE-20727) | Persist FlushedSequenceId to speed up WAL split after cluster restart | Major | . |
| [HBASE-20636](https://issues.apache.org/jira/browse/HBASE-20636) | Introduce two bloom filter type : ROWPREFIX\_FIXED\_LENGTH and ROWPREFIX\_DELIMITED | Major | HFile, regionserver, Scanners |
| [HBASE-20649](https://issues.apache.org/jira/browse/HBASE-20649) | Validate HFiles do not have PREFIX\_TREE DataBlockEncoding | Minor | Operability, tooling |
| [HBASE-20833](https://issues.apache.org/jira/browse/HBASE-20833) | Modify pre-upgrade coprocessor validator to support table level coprocessors | Major | Coprocessors |
| [HBASE-15809](https://issues.apache.org/jira/browse/HBASE-15809) | Basic Replication WebUI | Critical | Replication, UI |
| [HBASE-19064](https://issues.apache.org/jira/browse/HBASE-19064) | Synchronous replication for HBase | Major | Replication |
| [HBASE-19735](https://issues.apache.org/jira/browse/HBASE-19735) | Create a minimal "client" tarball installation | Major | build, Client |
| [HBASE-20630](https://issues.apache.org/jira/browse/HBASE-20630) | B&R: Delete command enhancements | Major | . |
| [HBASE-20656](https://issues.apache.org/jira/browse/HBASE-20656) | Validate pre-2.0 coprocessors against HBase 2.0+ | Major | tooling |
| [HBASE-20592](https://issues.apache.org/jira/browse/HBASE-20592) | Create a tool to verify tables do not have prefix tree encoding | Minor | Operability, tooling |
| [HBASE-20046](https://issues.apache.org/jira/browse/HBASE-20046) | Reconsider the implementation for serial replication | Major | Replication |
| [HBASE-20159](https://issues.apache.org/jira/browse/HBASE-20159) | Support using separate ZK quorums for client | Major | Client, Operability, Zookeeper |
| [HBASE-19397](https://issues.apache.org/jira/browse/HBASE-19397) | Design procedures for ReplicationManager to notify peer change event from master | Major | proc-v2, Replication |
| [HBASE-17933](https://issues.apache.org/jira/browse/HBASE-17933) | [hbase-spark] Support Java api for bulkload | Major | hbase-connectors, spark |
| [HBASE-15572](https://issues.apache.org/jira/browse/HBASE-15572) | Adding optional timestamp semantics to HBase-Spark | Major | hbase-connectors, spark |
| [HBASE-14849](https://issues.apache.org/jira/browse/HBASE-14849) | Add option to set block cache to false on SparkSQL executions | Major | hbase-connectors, spark |
| [HBASE-14340](https://issues.apache.org/jira/browse/HBASE-14340) | Add second bulk load option to Spark Bulk Load to send puts as the value | Minor | hbase-connectors, spark |
| [HBASE-14181](https://issues.apache.org/jira/browse/HBASE-14181) | Add Spark DataFrame DataSource to HBase-Spark Module | Minor | hbase-connectors, spark |
| [HBASE-14150](https://issues.apache.org/jira/browse/HBASE-14150) | Add BulkLoad functionality to HBase-Spark Module | Major | hbase-connectors, spark |
| [HBASE-13992](https://issues.apache.org/jira/browse/HBASE-13992) | Integrate SparkOnHBase into HBase | Major | hbase-connectors, spark |


### IMPROVEMENTS:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-25914](https://issues.apache.org/jira/browse/HBASE-25914) | Provide slow/large logs on RegionServer UI | Major | regionserver, UI |
| [HBASE-26012](https://issues.apache.org/jira/browse/HBASE-26012) | Improve logging and dequeue logic in DelayQueue | Minor | . |
| [HBASE-26020](https://issues.apache.org/jira/browse/HBASE-26020) | Split TestWALEntryStream.testDifferentCounts out | Major | Replication, test |
| [HBASE-25937](https://issues.apache.org/jira/browse/HBASE-25937) | Clarify UnknownRegionException | Minor | Client |
| [HBASE-25998](https://issues.apache.org/jira/browse/HBASE-25998) | Revisit synchronization in SyncFuture | Major | Performance, regionserver, wal |
| [HBASE-26000](https://issues.apache.org/jira/browse/HBASE-26000) | Optimize the display of ZK dump in the master web UI | Minor | . |
| [HBASE-25995](https://issues.apache.org/jira/browse/HBASE-25995) | Change the method name for DoubleArrayCost.setCosts | Major | Balancer |
| [HBASE-26002](https://issues.apache.org/jira/browse/HBASE-26002) | MultiRowMutationEndpoint should return the result of the conditional update | Major | Coprocessors |
| [HBASE-25993](https://issues.apache.org/jira/browse/HBASE-25993) | Make excluded SSL cipher suites configurable for all Web UIs | Major | . |
| [HBASE-25987](https://issues.apache.org/jira/browse/HBASE-25987) | Make SSL keystore type configurable for HBase ThriftServer | Major | Thrift |
| [HBASE-25666](https://issues.apache.org/jira/browse/HBASE-25666) | Explain why balancer is skipping runs | Major | Balancer, master, UI |
| [HBASE-25942](https://issues.apache.org/jira/browse/HBASE-25942) | Get rid of null regioninfo in wrapped connection exceptions | Trivial | logging |
| [HBASE-25745](https://issues.apache.org/jira/browse/HBASE-25745) | Deprecate/Rename config \`hbase.normalizer.min.region.count\` to \`hbase.normalizer.merge.min.region.count\` | Minor | master, Normalizer |
| [HBASE-25908](https://issues.apache.org/jira/browse/HBASE-25908) | Exclude jakarta.activation-api | Major | hadoop3, shading |
| [HBASE-25933](https://issues.apache.org/jira/browse/HBASE-25933) | Log trace raw exception, instead of cause message in NettyRpcServerRequestDecoder | Minor | . |
| [HBASE-25534](https://issues.apache.org/jira/browse/HBASE-25534) | Honor TableDescriptor settings earlier in normalization | Major | Normalizer |
| [HBASE-25906](https://issues.apache.org/jira/browse/HBASE-25906) | UI of master-status to show recent history of balancer desicion | Major | Balancer, master, UI |
| [HBASE-25899](https://issues.apache.org/jira/browse/HBASE-25899) | Improve efficiency of SnapshotHFileCleaner | Major | master |
| [HBASE-25682](https://issues.apache.org/jira/browse/HBASE-25682) | Add a new command to update the configuration of all RSs in a RSGroup | Major | Admin, shell |
| [HBASE-25032](https://issues.apache.org/jira/browse/HBASE-25032) | Do not assign regions to region server which has not called regionServerReport yet | Major | . |
| [HBASE-25860](https://issues.apache.org/jira/browse/HBASE-25860) | Add metric for successful wal roll requests. | Major | metrics, wal |
| [HBASE-25816](https://issues.apache.org/jira/browse/HBASE-25816) | Improve the documentation of "Architecture" section of reference guide | Minor | documentation |
| [HBASE-25754](https://issues.apache.org/jira/browse/HBASE-25754) | StripeCompactionPolicy should support compacting cold regions | Minor | Compaction |
| [HBASE-25766](https://issues.apache.org/jira/browse/HBASE-25766) | Introduce RegionSplitRestriction that restricts the pattern of the split point | Major | . |
| [HBASE-25798](https://issues.apache.org/jira/browse/HBASE-25798) | typo in MetricsAssertHelper | Minor | . |
| [HBASE-25770](https://issues.apache.org/jira/browse/HBASE-25770) | Http InfoServers should honor gzip encoding when requested | Major | UI |
| [HBASE-25776](https://issues.apache.org/jira/browse/HBASE-25776) | Use Class.asSubclass to fix the warning in StochasticLoadBalancer.loadCustomCostFunctions | Minor | Balancer |
| [HBASE-25767](https://issues.apache.org/jira/browse/HBASE-25767) | CandidateGenerator.getRandomIterationOrder is too slow on large cluster | Major | Balancer, Performance |
| [HBASE-25762](https://issues.apache.org/jira/browse/HBASE-25762) | Improvement for some debug-logging guards | Minor | logging, Performance |
| [HBASE-25653](https://issues.apache.org/jira/browse/HBASE-25653) | Add units and round off region size to 2 digits after decimal | Major | master, Normalizer |
| [HBASE-25482](https://issues.apache.org/jira/browse/HBASE-25482) | Improve SimpleRegionNormalizer#getAverageRegionSizeMb | Minor | Normalizer |
| [HBASE-25759](https://issues.apache.org/jira/browse/HBASE-25759) | The master services field in LocalityBasedCostFunction is never used | Major | Balancer |
| [HBASE-25744](https://issues.apache.org/jira/browse/HBASE-25744) | Change default of \`hbase.normalizer.merge.min\_region\_size.mb\` to \`0\` | Major | master, Normalizer |
| [HBASE-25747](https://issues.apache.org/jira/browse/HBASE-25747) | Remove unused getWriteAvailable method in OperationQuota | Minor | Quotas |
| [HBASE-25558](https://issues.apache.org/jira/browse/HBASE-25558) | Adding audit log for execMasterService | Major | . |
| [HBASE-25703](https://issues.apache.org/jira/browse/HBASE-25703) | Support conditional update in MultiRowMutationEndpoint | Major | Coprocessors |
| [HBASE-25705](https://issues.apache.org/jira/browse/HBASE-25705) | Convert proto to RSGroupInfo is costly | Minor | rsgroup |
| [HBASE-25702](https://issues.apache.org/jira/browse/HBASE-25702) | Remove RowProcessor | Major | . |
| [HBASE-25686](https://issues.apache.org/jira/browse/HBASE-25686) | [hbtop] Add some javadoc | Minor | hbtop |
| [HBASE-25627](https://issues.apache.org/jira/browse/HBASE-25627) | HBase replication should have a metric to represent if the source is stuck getting initialized | Major | Replication |
| [HBASE-25688](https://issues.apache.org/jira/browse/HBASE-25688) | Use CustomRequestLog instead of Slf4jRequestLog for jetty | Major | logging, UI |
| [HBASE-25678](https://issues.apache.org/jira/browse/HBASE-25678) | Support nonce operations for Increment/Append in RowMutations and CheckAndMutate | Major | . |
| [HBASE-25518](https://issues.apache.org/jira/browse/HBASE-25518) | Support separate child regions to different region servers | Major | . |
| [HBASE-25643](https://issues.apache.org/jira/browse/HBASE-25643) | The delayed FlushRegionEntry should be removed when we need a non-delayed one | Major | regionserver |
| [HBASE-25608](https://issues.apache.org/jira/browse/HBASE-25608) | Support HFileOutputFormat locality sensitive even destination cluster is different from source cluster | Major | . |
| [HBASE-25621](https://issues.apache.org/jira/browse/HBASE-25621) | Balancer should check region plan source to avoid misplace region groups | Major | Balancer |
| [HBASE-25374](https://issues.apache.org/jira/browse/HBASE-25374) | Make REST Client connection and socket time out configurable | Minor | REST |
| [HBASE-25597](https://issues.apache.org/jira/browse/HBASE-25597) | Add row info in Exception when cell size exceeds maxCellSize | Minor | . |
| [HBASE-25660](https://issues.apache.org/jira/browse/HBASE-25660) | Print split policy in use on Region open (as well as split policy vitals) | Trivial | . |
| [HBASE-25635](https://issues.apache.org/jira/browse/HBASE-25635) | CandidateGenerator may miss some region balance actions | Major | Balancer |
| [HBASE-25622](https://issues.apache.org/jira/browse/HBASE-25622) | Result#compareResults should compare tags. | Major | Client |
| [HBASE-25570](https://issues.apache.org/jira/browse/HBASE-25570) | On largish cluster, "CleanerChore: Could not delete dir..." makes master log unreadable | Major | . |
| [HBASE-25566](https://issues.apache.org/jira/browse/HBASE-25566) | RoundRobinTableInputFormat | Major | mapreduce |
| [HBASE-25636](https://issues.apache.org/jira/browse/HBASE-25636) | Expose HBCK report as metrics | Minor | metrics |
| [HBASE-25548](https://issues.apache.org/jira/browse/HBASE-25548) | Optionally allow snapshots to preserve cluster's max filesize config by setting it into table descriptor | Major | . |
| [HBASE-25582](https://issues.apache.org/jira/browse/HBASE-25582) | Support setting scan ReadType to be STREAM at cluster level | Major | . |
| [HBASE-25630](https://issues.apache.org/jira/browse/HBASE-25630) | Set switch compaction after bulkload default as false | Major | . |
| [HBASE-23578](https://issues.apache.org/jira/browse/HBASE-23578) | [UI] Master UI shows long stack traces when table is broken | Minor | master, UI |
| [HBASE-25637](https://issues.apache.org/jira/browse/HBASE-25637) | Rename method completeCompaction to refreshStoreSizeCount | Minor | . |
| [HBASE-25603](https://issues.apache.org/jira/browse/HBASE-25603) | Add switch for compaction after bulkload | Major | Compaction |
| [HBASE-25539](https://issues.apache.org/jira/browse/HBASE-25539) | Add metric for age of oldest wal. | Major | metrics, regionserver |
| [HBASE-25574](https://issues.apache.org/jira/browse/HBASE-25574) | Revisit put/delete/increment/append related RegionObserver methods | Major | Coprocessors |
| [HBASE-25541](https://issues.apache.org/jira/browse/HBASE-25541) | In WALEntryStream, set the current path to null while dequeing the log | Major | . |
| [HBASE-23887](https://issues.apache.org/jira/browse/HBASE-23887) | New L1 cache : AdaptiveLRU | Major | BlockCache, Performance |
| [HBASE-25508](https://issues.apache.org/jira/browse/HBASE-25508) | Add a python example of using the thrift proxy in thrift-over-http mode | Minor | Thrift |
| [HBASE-25364](https://issues.apache.org/jira/browse/HBASE-25364) | Redo the getMidPoint() in HFileWriterImpl to get rid of the double comparison process | Minor | . |
| [HBASE-25519](https://issues.apache.org/jira/browse/HBASE-25519) | BLOCKSIZE needs to support pretty print | Major | . |
| [HBASE-25507](https://issues.apache.org/jira/browse/HBASE-25507) | Leak of ESTABLISHED sockets when compaction encountered "java.io.IOException: Invalid HFile block magic" | Major | Compaction |
| [HBASE-24772](https://issues.apache.org/jira/browse/HBASE-24772) | Use GetoptLong or OptionParser in hbase-shell | Minor | shell |
| [HBASE-25542](https://issues.apache.org/jira/browse/HBASE-25542) | Add client detail to scan name so when lease expires, we have clue on who was scanning | Major | scan |
| [HBASE-25553](https://issues.apache.org/jira/browse/HBASE-25553) | It is better for ReplicationTracker.getListOfRegionServers to return ServerName instead of String | Major | . |
| [HBASE-25528](https://issues.apache.org/jira/browse/HBASE-25528) | Dedicated merge dispatch threadpool on master | Minor | master |
| [HBASE-25536](https://issues.apache.org/jira/browse/HBASE-25536) | Remove 0 length wal file from logQueue if it belongs to old sources. | Major | Replication |
| [HBASE-25506](https://issues.apache.org/jira/browse/HBASE-25506) | ServerManager affects MTTR of HMaster | Major | master, MTTR |
| [HBASE-25368](https://issues.apache.org/jira/browse/HBASE-25368) | Filter out more invalid encoded name in isEncodedRegionName(byte[] regionName) | Major | Client |
| [HBASE-25329](https://issues.apache.org/jira/browse/HBASE-25329) | Dump region hashes in logs for the regions that are stuck in transition for more than a configured amount of time | Minor | . |
| [HBASE-25475](https://issues.apache.org/jira/browse/HBASE-25475) | Improve unit test for HBASE-25445 : SplitWALRemoteProcedure failed to archive split WAL | Minor | wal |
| [HBASE-25431](https://issues.apache.org/jira/browse/HBASE-25431) | MAX\_FILESIZE and MEMSTORE\_FLUSHSIZE should not be set negative number | Major | . |
| [HBASE-25439](https://issues.apache.org/jira/browse/HBASE-25439) | Add BYTE unit in PrettyPrinter.Unit | Major | . |
| [HBASE-25249](https://issues.apache.org/jira/browse/HBASE-25249) | Adding StoreContext | Major | . |
| [HBASE-23340](https://issues.apache.org/jira/browse/HBASE-23340) | hmaster /hbase/replication/rs session expired (hbase replication default value is true, we don't use ) causes logcleaner can not clean oldWALs, which resulits in oldWALs too large (more than 2TB) | Major | master |
| [HBASE-25449](https://issues.apache.org/jira/browse/HBASE-25449) | 'dfs.client.read.shortcircuit' should not be set in hbase-default.xml | Major | conf |
| [HBASE-25476](https://issues.apache.org/jira/browse/HBASE-25476) | Enable error prone check in pre commit | Major | build |
| [HBASE-25211](https://issues.apache.org/jira/browse/HBASE-25211) | Rack awareness in region\_mover | Major | . |
| [HBASE-25483](https://issues.apache.org/jira/browse/HBASE-25483) | set the loadMeta log level to debug. | Major | MTTR, Region Assignment |
| [HBASE-25471](https://issues.apache.org/jira/browse/HBASE-25471) | Move RegionScannerImpl out of HRegion | Major | regionserver |
| [HBASE-25458](https://issues.apache.org/jira/browse/HBASE-25458) | HRegion methods cleanup | Major | regionserver |
| [HBASE-25435](https://issues.apache.org/jira/browse/HBASE-25435) | Slow metric value can be configured | Minor | metrics |
| [HBASE-25438](https://issues.apache.org/jira/browse/HBASE-25438) | Update create-release mvn in Dockerfile; its 3.6.0; make it 3.6.3 | Major | create-release |
| [HBASE-25318](https://issues.apache.org/jira/browse/HBASE-25318) | Configure where IntegrationTestImportTsv generates HFiles | Minor | integration tests |
| [HBASE-25450](https://issues.apache.org/jira/browse/HBASE-25450) | The parameter "hbase.bucketcache.size" is misdescribed | Major | conf |
| [HBASE-25437](https://issues.apache.org/jira/browse/HBASE-25437) | Update refguide RC section; point at the dev-tools/create-releases/README.txt rather than repeat its content | Major | documentation |
| [HBASE-24751](https://issues.apache.org/jira/browse/HBASE-24751) | Display Task completion time and/or processing duration on Web UI | Minor | UI |
| [HBASE-25379](https://issues.apache.org/jira/browse/HBASE-25379) | Make retry pause time configurable for regionserver short operation RPC (reportRegionStateTransition/reportProcedureDone) | Minor | regionserver |
| [HBASE-24850](https://issues.apache.org/jira/browse/HBASE-24850) | CellComparator perf improvement | Critical | Performance, scan |
| [HBASE-25443](https://issues.apache.org/jira/browse/HBASE-25443) | Improve the experience of using the Master webpage by change the loading process of snapshot list to asynchronous | Minor | master, UI |
| [HBASE-24764](https://issues.apache.org/jira/browse/HBASE-24764) | Add support of adding base peer configs via hbase-site.xml for all replication peers. | Minor | Replication |
| [HBASE-25425](https://issues.apache.org/jira/browse/HBASE-25425) | Some notes on RawCell | Trivial | . |
| [HBASE-25084](https://issues.apache.org/jira/browse/HBASE-25084) | RegexStringComparator in ParseFilter should support case-insensitive regexes | Major | Thrift |
| [HBASE-25420](https://issues.apache.org/jira/browse/HBASE-25420) | Some minor improvements in rpc implementation | Minor | rpc |
| [HBASE-25246](https://issues.apache.org/jira/browse/HBASE-25246) | Backup/Restore hbase cell tags. | Major | backup&restore |
| [HBASE-25363](https://issues.apache.org/jira/browse/HBASE-25363) | Improve performance of HFileLinkCleaner by using ReadWriteLock instead of synchronize | Major | master |
| [HBASE-25328](https://issues.apache.org/jira/browse/HBASE-25328) | Add builder method to create Tags. | Minor | . |
| [HBASE-25339](https://issues.apache.org/jira/browse/HBASE-25339) | Method parameter and member variable are duplicated in checkSplittable() of SplitTableRegionProcedure | Minor | . |
| [HBASE-25237](https://issues.apache.org/jira/browse/HBASE-25237) | 'hbase master stop' shuts down the cluster, not the master only | Major | . |
| [HBASE-25324](https://issues.apache.org/jira/browse/HBASE-25324) | Remove unnecessary array to list conversion in SplitLogManager | Minor | . |
| [HBASE-25263](https://issues.apache.org/jira/browse/HBASE-25263) | Change encryption key generation algorithm used in the HBase shell | Major | encryption, shell |
| [HBASE-25323](https://issues.apache.org/jira/browse/HBASE-25323) | Fix potential NPE when the zookeeper path of RegionServerTracker does not exist when start | Minor | . |
| [HBASE-25281](https://issues.apache.org/jira/browse/HBASE-25281) | Bulkload split hfile too many times due to unreasonable split point | Minor | tooling |
| [HBASE-25325](https://issues.apache.org/jira/browse/HBASE-25325) | Remove unused class ClusterSchemaException | Minor | . |
| [HBASE-25282](https://issues.apache.org/jira/browse/HBASE-25282) | Remove processingServers in DeadServer as we can get this information by Procedure of master | Minor | . |
| [HBASE-25213](https://issues.apache.org/jira/browse/HBASE-25213) | Should request Compaction when bulkLoadHFiles is done | Minor | . |
| [HBASE-25187](https://issues.apache.org/jira/browse/HBASE-25187) | Improve SizeCachedKV variants initialization | Minor | . |
| [HBASE-24877](https://issues.apache.org/jira/browse/HBASE-24877) | Add option to avoid aborting RS process upon uncaught exceptions happen on replication source | Major | Replication |
| [HBASE-25298](https://issues.apache.org/jira/browse/HBASE-25298) | hbase.rsgroup.fallback.enable should support dynamic configuration | Major | . |
| [HBASE-24664](https://issues.apache.org/jira/browse/HBASE-24664) | Some changing of split region by overall region size rather than only one store size | Major | regionserver |
| [HBASE-24654](https://issues.apache.org/jira/browse/HBASE-24654) | Allow unset table's rsgroup | Major | rsgroup |
| [HBASE-25026](https://issues.apache.org/jira/browse/HBASE-25026) | Create a metric to track full region scans RPCs | Minor | . |
| [HBASE-25289](https://issues.apache.org/jira/browse/HBASE-25289) | [testing] Clean up resources after tests in rsgroup\_shell\_test.rb | Major | rsgroup, test |
| [HBASE-25261](https://issues.apache.org/jira/browse/HBASE-25261) | Upgrade Bootstrap to 3.4.1 | Major | security, UI |
| [HBASE-23224](https://issues.apache.org/jira/browse/HBASE-23224) | Delete the TODO ("get rid of allocations") tag in the WALProcedureStore class | Trivial | proc-v2 |
| [HBASE-25273](https://issues.apache.org/jira/browse/HBASE-25273) | fix typo in StripeStoreFileManager java doc | Major | . |
| [HBASE-25267](https://issues.apache.org/jira/browse/HBASE-25267) | Add SSL keystore type and truststore related configs for HBase RESTServer | Major | REST |
| [HBASE-25181](https://issues.apache.org/jira/browse/HBASE-25181) | Add options for disabling column family encryption and choosing hash algorithm for wrapped encryption keys. | Major | encryption |
| [HBASE-25254](https://issues.apache.org/jira/browse/HBASE-25254) | Rewrite TestMultiLogThreshold to remove the LogDelegate in RSRpcServices | Major | logging, test |
| [HBASE-25252](https://issues.apache.org/jira/browse/HBASE-25252) | Move HMaster inner classes out | Minor | master |
| [HBASE-25240](https://issues.apache.org/jira/browse/HBASE-25240) | gson format of RpcServer.logResponse is abnormal | Minor | . |
| [HBASE-25210](https://issues.apache.org/jira/browse/HBASE-25210) | RegionInfo.isOffline is now a duplication with RegionInfo.isSplit | Major | meta |
| [HBASE-25212](https://issues.apache.org/jira/browse/HBASE-25212) | Optionally abort requests in progress after deciding a region should close | Major | regionserver |
| [HBASE-24859](https://issues.apache.org/jira/browse/HBASE-24859) | Optimize in-memory representation of mapreduce TableSplit objects | Major | mapreduce |
| [HBASE-24967](https://issues.apache.org/jira/browse/HBASE-24967) | The table.jsp cost long time to load if the table include closed regions | Major | UI |
| [HBASE-25167](https://issues.apache.org/jira/browse/HBASE-25167) | Normalizer support for hot config reloading | Major | master, Normalizer |
| [HBASE-24419](https://issues.apache.org/jira/browse/HBASE-24419) | Normalizer merge plans should consider more than 2 regions when possible | Major | master, Normalizer |
| [HBASE-25224](https://issues.apache.org/jira/browse/HBASE-25224) | Maximize sleep for checking meta and namespace regions availability | Major | master |
| [HBASE-25223](https://issues.apache.org/jira/browse/HBASE-25223) | Use try-with-resources statement in snapshot package | Minor | . |
| [HBASE-25201](https://issues.apache.org/jira/browse/HBASE-25201) | YouAreDeadException should be moved to hbase-server module | Major | Client |
| [HBASE-25189](https://issues.apache.org/jira/browse/HBASE-25189) | [Metrics] Add checkAndPut and checkAndDelete latency metrics at table level | Minor | metrics |
| [HBASE-25193](https://issues.apache.org/jira/browse/HBASE-25193) | Add support for row prefix and type in the WAL Pretty Printer and some minor fixes | Minor | wal |
| [HBASE-25128](https://issues.apache.org/jira/browse/HBASE-25128) | RSGroupInfo's toString() and hashCode() does not take into account configuration map. | Minor | rsgroup |
| [HBASE-24840](https://issues.apache.org/jira/browse/HBASE-24840) | Avoid shows closing region task when create table | Major | monitoring |
| [HBASE-24628](https://issues.apache.org/jira/browse/HBASE-24628) | Region normalizer now respects a rate limit | Major | Normalizer |
| [HBASE-25179](https://issues.apache.org/jira/browse/HBASE-25179) | Assert format is incorrect in HFilePerformanceEvaluation class. | Minor | Performance, test |
| [HBASE-25065](https://issues.apache.org/jira/browse/HBASE-25065) | WAL archival to be done by a separate thread | Major | wal |
| [HBASE-14067](https://issues.apache.org/jira/browse/HBASE-14067) | bundle ruby files for hbase shell into a jar. | Major | shell |
| [HBASE-24875](https://issues.apache.org/jira/browse/HBASE-24875) | Remove the force param for unassign since it dose not take effect any more | Major | Client |
| [HBASE-25171](https://issues.apache.org/jira/browse/HBASE-25171) | Remove ZNodePaths.namespaceZNode | Major | Zookeeper |
| [HBASE-24025](https://issues.apache.org/jira/browse/HBASE-24025) | Improve performance of move\_servers\_rsgroup and move\_tables\_rsgroup by using async region move API | Major | rsgroup |
| [HBASE-25160](https://issues.apache.org/jira/browse/HBASE-25160) | Refactor AccessController and VisibilityController | Major | . |
| [HBASE-25146](https://issues.apache.org/jira/browse/HBASE-25146) | Add extra logging at info level to HFileCorruptionChecker in order to report progress | Major | hbck, hbck2 |
| [HBASE-24054](https://issues.apache.org/jira/browse/HBASE-24054) | The Jetty's version number leak occurred while using the thrift service | Minor | . |
| [HBASE-25091](https://issues.apache.org/jira/browse/HBASE-25091) | Move LogComparator from ReplicationSource to AbstractFSWALProvider#.WALsStartTimeComparator | Minor | . |
| [HBASE-24981](https://issues.apache.org/jira/browse/HBASE-24981) | Enable table replication fails from 1.x to 2.x if table already exist at peer. | Major | Replication |
| [HBASE-25062](https://issues.apache.org/jira/browse/HBASE-25062) | The link of "Re:(HBASE-451) Remove HTableDescriptor from HRegionInfo" invalid | Minor | documentation |
| [HBASE-25109](https://issues.apache.org/jira/browse/HBASE-25109) | Add MR Counters to WALPlayer; currently hard to tell if it is doing anything | Major | . |
| [HBASE-25074](https://issues.apache.org/jira/browse/HBASE-25074) | Refactor ReplicationSinkManager: reduce code and make it easy to understand | Major | Replication |
| [HBASE-25086](https://issues.apache.org/jira/browse/HBASE-25086) | Refactor Replication: move the default ReplicationSinkService implementation out | Major | Replication |
| [HBASE-25082](https://issues.apache.org/jira/browse/HBASE-25082) | Per table WAL metrics: appendCount and appendSize | Major | metrics |
| [HBASE-25079](https://issues.apache.org/jira/browse/HBASE-25079) | Upgrade Bootstrap to 3.3.7 | Major | security, UI |
| [HBASE-25076](https://issues.apache.org/jira/browse/HBASE-25076) | fix typo in MasterRegion java doc | Major | . |
| [HBASE-25075](https://issues.apache.org/jira/browse/HBASE-25075) | Fix typo in ReplicationProtobufUtil | Major | Replication |
| [HBASE-24976](https://issues.apache.org/jira/browse/HBASE-24976) | REST Server failes to start without any error message | Major | REST |
| [HBASE-25066](https://issues.apache.org/jira/browse/HBASE-25066) | Use FutureUtils.rethrow in AsyncTableResultScanner to better catch the stack trace | Major | Client, Scanners |
| [HBASE-25069](https://issues.apache.org/jira/browse/HBASE-25069) | Display region name instead of encoded region name in HBCK report page. | Minor | hbck |
| [HBASE-24991](https://issues.apache.org/jira/browse/HBASE-24991) | Replace MovedRegionsCleaner with guava cache | Minor | . |
| [HBASE-25057](https://issues.apache.org/jira/browse/HBASE-25057) | Fix typo "memeber" | Trivial | documentation |
| [HBASE-25037](https://issues.apache.org/jira/browse/HBASE-25037) | Lots of thread pool are changed to non daemon after HBASE-24750 which causes trouble when shutting down | Major | . |
| [HBASE-24831](https://issues.apache.org/jira/browse/HBASE-24831) | Avoid invoke Counter using reflection in SnapshotInputFormat | Major | . |
| [HBASE-25002](https://issues.apache.org/jira/browse/HBASE-25002) | Create simple pattern matching query for retrieving metrics matching the pattern | Major | . |
| [HBASE-25022](https://issues.apache.org/jira/browse/HBASE-25022) | Remove 'hbase.testing.nocluster' config | Major | test |
| [HBASE-25006](https://issues.apache.org/jira/browse/HBASE-25006) | Make the cost functions optional for StochastoicBalancer | Major | . |
| [HBASE-24974](https://issues.apache.org/jira/browse/HBASE-24974) | Provide a flexibility to print only row key and filter for multiple tables in the WALPrettyPrinter | Minor | wal |
| [HBASE-24994](https://issues.apache.org/jira/browse/HBASE-24994) | Add hedgedReadOpsInCurThread metric | Minor | metrics |
| [HBASE-25005](https://issues.apache.org/jira/browse/HBASE-25005) | Refactor CatalogJanitor | Major | master, meta |
| [HBASE-24992](https://issues.apache.org/jira/browse/HBASE-24992) | log after Generator success when running ITBLL | Trivial | . |
| [HBASE-24937](https://issues.apache.org/jira/browse/HBASE-24937) | table.rb use LocalDateTime to replace Instant | Minor | shell |
| [HBASE-24940](https://issues.apache.org/jira/browse/HBASE-24940) | runCatalogJanitor() API should return -1 to indicate already running status | Major | . |
| [HBASE-24973](https://issues.apache.org/jira/browse/HBASE-24973) | Remove read point parameter in method StoreFlush#performFlush and StoreFlush#createScanner | Minor | . |
| [HBASE-24569](https://issues.apache.org/jira/browse/HBASE-24569) | Get hostAndWeights in addition using localhost if it is null in local mode | Minor | regionserver |
| [HBASE-24913](https://issues.apache.org/jira/browse/HBASE-24913) | Refactor TestJMXConnectorServer | Major | test |
| [HBASE-24949](https://issues.apache.org/jira/browse/HBASE-24949) | Optimize FSTableDescriptors.get to not always go to fs when cache miss | Major | master |
| [HBASE-24898](https://issues.apache.org/jira/browse/HBASE-24898) | Use EnvironmentEdge.currentTime() instead of System.currentTimeMillis() in CurrentHourProvider | Major | tooling |
| [HBASE-24928](https://issues.apache.org/jira/browse/HBASE-24928) | balanceRSGroup should skip generating balance plan for disabled table and splitParent region | Major | Balancer |
| [HBASE-24942](https://issues.apache.org/jira/browse/HBASE-24942) | MergeTableRegionsProcedure should not call clean merge region | Major | proc-v2, Region Assignment |
| [HBASE-24811](https://issues.apache.org/jira/browse/HBASE-24811) | Use class access static field or method | Minor | . |
| [HBASE-24915](https://issues.apache.org/jira/browse/HBASE-24915) | Improve BlockCache read performance by specifying BlockType | Major | BlockCache, Performance |
| [HBASE-24686](https://issues.apache.org/jira/browse/HBASE-24686) | [LOG] Log improvement in Connection#close | Major | Client, logging |
| [HBASE-24912](https://issues.apache.org/jira/browse/HBASE-24912) | Enlarge MemstoreFlusherChore/CompactionChecker period for unit test | Major | . |
| [HBASE-24914](https://issues.apache.org/jira/browse/HBASE-24914) | Remove duplicate code appearing continuously in method ReplicationPeerManager.updatePeerConfig | Minor | Replication |
| [HBASE-24627](https://issues.apache.org/jira/browse/HBASE-24627) | Normalize one table at a time | Major | Normalizer |
| [HBASE-24872](https://issues.apache.org/jira/browse/HBASE-24872) | refactor valueOf PoolType | Minor | Client |
| [HBASE-24854](https://issues.apache.org/jira/browse/HBASE-24854) | Correct the help content of assign and unassign commands in hbase shell | Minor | shell |
| [HBASE-24750](https://issues.apache.org/jira/browse/HBASE-24750) | All executor service should start using guava ThreadFactory | Major | . |
| [HBASE-24709](https://issues.apache.org/jira/browse/HBASE-24709) | Support MoveCostFunction use a lower multiplier in offpeak hours | Major | Balancer |
| [HBASE-24824](https://issues.apache.org/jira/browse/HBASE-24824) | Add more stats in PE for read replica | Minor | PE, read replicas |
| [HBASE-21721](https://issues.apache.org/jira/browse/HBASE-21721) | FSHLog : reduce write#syncs() times | Major | . |
| [HBASE-24404](https://issues.apache.org/jira/browse/HBASE-24404) | Support flush a single column family of region | Major | shell |
| [HBASE-24826](https://issues.apache.org/jira/browse/HBASE-24826) | Add some comments for processlist in hbase shell | Minor | shell |
| [HBASE-24659](https://issues.apache.org/jira/browse/HBASE-24659) | Calculate FIXED\_OVERHEAD automatically | Major | . |
| [HBASE-24827](https://issues.apache.org/jira/browse/HBASE-24827) | BackPort HBASE-11554 Remove Reusable poolmap Rpc client type. | Major | Client |
| [HBASE-24823](https://issues.apache.org/jira/browse/HBASE-24823) | Port HBASE-22762 Print the delta between phases in the split/merge/compact/flush transaction journals to master branch | Minor | . |
| [HBASE-24795](https://issues.apache.org/jira/browse/HBASE-24795) | RegionMover should deal with unknown (split/merged) regions | Major | . |
| [HBASE-24821](https://issues.apache.org/jira/browse/HBASE-24821) | Simplify the logic of getRegionInfo in TestFlushFromClient to reduce redundancy code | Minor | test |
| [HBASE-24791](https://issues.apache.org/jira/browse/HBASE-24791) | Improve HFileOutputFormat2 to avoid always call getTableRelativePath method | Critical | mapreduce |
| [HBASE-24704](https://issues.apache.org/jira/browse/HBASE-24704) | Make the Table Schema easier to view even there are multiple families | Major | UI |
| [HBASE-24476](https://issues.apache.org/jira/browse/HBASE-24476) | release scripts should provide timing information | Minor | . |
| [HBASE-24695](https://issues.apache.org/jira/browse/HBASE-24695) | FSHLog - close the current WAL file in a background thread | Major | . |
| [HBASE-24803](https://issues.apache.org/jira/browse/HBASE-24803) | Unify hbase-shell ::Shell::Commands::Command#help behavior | Minor | shell |
| [HBASE-11686](https://issues.apache.org/jira/browse/HBASE-11686) | Shell code should create a binding / irb workspace instead of polluting the root namespace | Minor | shell |
| [HBASE-20226](https://issues.apache.org/jira/browse/HBASE-20226) | Performance Improvement Taking Large Snapshots In Remote Filesystems | Minor | snapshots |
| [HBASE-24722](https://issues.apache.org/jira/browse/HBASE-24722) | Address hbase-shell commands with unintentional return values | Minor | shell |
| [HBASE-24669](https://issues.apache.org/jira/browse/HBASE-24669) | Logging of ppid should be consistent across all occurrences | Minor | Operability, proc-v2 |
| [HBASE-24790](https://issues.apache.org/jira/browse/HBASE-24790) | Remove unused counter from SplitLogCounters | Minor | wal |
| [HBASE-24757](https://issues.apache.org/jira/browse/HBASE-24757) | ReplicationSink should limit the batch rowcount for batch mutations based on hbase.rpc.rows.warning.threshold | Major | . |
| [HBASE-24777](https://issues.apache.org/jira/browse/HBASE-24777) | InfoServer support ipv6 host and port | Minor | UI |
| [HBASE-24758](https://issues.apache.org/jira/browse/HBASE-24758) | Avoid flooding replication source RSes logs when no sinks are available | Major | Replication |
| [HBASE-24743](https://issues.apache.org/jira/browse/HBASE-24743) | Reject to add a peer which replicate to itself earlier | Major | . |
| [HBASE-24696](https://issues.apache.org/jira/browse/HBASE-24696) | Include JVM information on Web UI under "Software Attributes" | Minor | UI |
| [HBASE-24555](https://issues.apache.org/jira/browse/HBASE-24555) | Clear the description of hbase.hregion.max.filesize | Minor | documentation |
| [HBASE-24740](https://issues.apache.org/jira/browse/HBASE-24740) | Enable journal logging for HBase snapshot operation | Minor | master |
| [HBASE-24747](https://issues.apache.org/jira/browse/HBASE-24747) | Log an ERROR if HBaseSaslRpcServer initialisation fails with an uncaught exception | Major | . |
| [HBASE-24578](https://issues.apache.org/jira/browse/HBASE-24578) | [WAL] Add a parameter to config RingBufferEventHandler's SyncFuture count | Major | wal |
| [HBASE-24586](https://issues.apache.org/jira/browse/HBASE-24586) | Add table level locality in table.jsp | Major | UI |
| [HBASE-24663](https://issues.apache.org/jira/browse/HBASE-24663) | Add procedure process time statistics UI | Major | . |
| [HBASE-24653](https://issues.apache.org/jira/browse/HBASE-24653) | Show snapshot owner on Master WebUI | Major | . |
| [HBASE-24431](https://issues.apache.org/jira/browse/HBASE-24431) | RSGroupInfo add configuration map to store something extra | Major | rsgroup |
| [HBASE-24671](https://issues.apache.org/jira/browse/HBASE-24671) | Add excludefile and designatedfile options to graceful\_stop.sh | Major | . |
| [HBASE-24562](https://issues.apache.org/jira/browse/HBASE-24562) | Stabilize master startup with meta replicas enabled | Major | meta, read replicas |
| [HBASE-24560](https://issues.apache.org/jira/browse/HBASE-24560) | Add a new option of designatedfile in RegionMover | Major | . |
| [HBASE-20819](https://issues.apache.org/jira/browse/HBASE-20819) | Use TableDescriptor to replace HTableDescriptor in hbase-shell module | Minor | shell |
| [HBASE-24221](https://issues.apache.org/jira/browse/HBASE-24221) | Support bulkLoadHFile by family | Major | HFile |
| [HBASE-24382](https://issues.apache.org/jira/browse/HBASE-24382) | Flush partial stores of region filtered by seqId when archive wal due to too many wals | Major | wal |
| [HBASE-24603](https://issues.apache.org/jira/browse/HBASE-24603) | Zookeeper sync() call is async | Critical | master, regionserver |
| [HBASE-23339](https://issues.apache.org/jira/browse/HBASE-23339) | Release scripts should not need to write out a copy of gpg key material | Critical | community, scripts |
| [HBASE-24205](https://issues.apache.org/jira/browse/HBASE-24205) | Create metric to know the number of reads that happens from memstore | Major | metrics |
| [HBASE-24605](https://issues.apache.org/jira/browse/HBASE-24605) | Break long region names in the web UI | Minor | UI |
| [HBASE-15161](https://issues.apache.org/jira/browse/HBASE-15161) | Umbrella: Miscellaneous improvements from production usage | Major | . |
| [HBASE-24102](https://issues.apache.org/jira/browse/HBASE-24102) | RegionMover should exclude draining/decommissioning nodes from target RSs | Major | . |
| [HBASE-24380](https://issues.apache.org/jira/browse/HBASE-24380) | Improve WAL splitting log lines to enable sessionization | Minor | logging, Operability, wal |
| [HBASE-21405](https://issues.apache.org/jira/browse/HBASE-21405) | [DOC] Add Details about Output of "status 'replication'" | Minor | documentation, Replication |
| [HBASE-24478](https://issues.apache.org/jira/browse/HBASE-24478) | The regionInfo parameter for MasterProcedureScheduler#waitRegions and MasterProcedureScheduler#wakeRegions should be plural | Minor | proc-v2 |
| [HBASE-24524](https://issues.apache.org/jira/browse/HBASE-24524) | SyncTable logging improvements | Minor | . |
| [HBASE-24441](https://issues.apache.org/jira/browse/HBASE-24441) | CacheConfig details logged at Store open is not really useful | Minor | logging, regionserver |
| [HBASE-24468](https://issues.apache.org/jira/browse/HBASE-24468) | Add region info when log meessages in HStore. | Minor | logging, regionserver |
| [HBASE-24208](https://issues.apache.org/jira/browse/HBASE-24208) | Remove RS entry from zk draining servers node after RS been stopped | Major | . |
| [HBASE-24483](https://issues.apache.org/jira/browse/HBASE-24483) | Add repeated prefix logging for MultipleColumnPrefixFilter | Minor | Filters |
| [HBASE-24359](https://issues.apache.org/jira/browse/HBASE-24359) | Optionally ignore edits for deleted CFs for replication. | Major | Replication |
| [HBASE-24504](https://issues.apache.org/jira/browse/HBASE-24504) | refactor call setupCluster/tearDownCluster in TestTableSnapshotInputFormat | Minor | mapreduce, test |
| [HBASE-24458](https://issues.apache.org/jira/browse/HBASE-24458) | release scripts using docker should specify needed disk consistency | Major | . |
| [HBASE-24412](https://issues.apache.org/jira/browse/HBASE-24412) | Canary support check only one column family per RegionTask | Major | canary |
| [HBASE-24456](https://issues.apache.org/jira/browse/HBASE-24456) | Immutable Scan as unmodifiable subclass or wrapper of Scan | Major | . |
| [HBASE-21406](https://issues.apache.org/jira/browse/HBASE-21406) | "status 'replication'" should not show SINK if the cluster does not act as sink | Minor | . |
| [HBASE-24486](https://issues.apache.org/jira/browse/HBASE-24486) | Remove the unused method online in admin.rb | Minor | . |
| [HBASE-24474](https://issues.apache.org/jira/browse/HBASE-24474) | Rename LocalRegion to MasterRegion | Blocker | master |
| [HBASE-23841](https://issues.apache.org/jira/browse/HBASE-23841) | Remove deprecated methods from Scan | Minor | scan |
| [HBASE-24455](https://issues.apache.org/jira/browse/HBASE-24455) | Correct the doc of "On the number of column families" | Minor | documentation |
| [HBASE-24475](https://issues.apache.org/jira/browse/HBASE-24475) | Clean up the master thread name getting in SplitLogManager and AssignmentManager | Minor | . |
| [HBASE-24471](https://issues.apache.org/jira/browse/HBASE-24471) | The way we bootstrap meta table is confusing | Major | master, meta, proc-v2 |
| [HBASE-24132](https://issues.apache.org/jira/browse/HBASE-24132) | Upgrade to Apache ZooKeeper 3.5.7 | Major | . |
| [HBASE-24470](https://issues.apache.org/jira/browse/HBASE-24470) | Add store file info when log meessages in HStore. | Minor | logging, regionserver |
| [HBASE-24451](https://issues.apache.org/jira/browse/HBASE-24451) | Remove the HasThread because the related bug had been fixed since jdk7 | Major | util |
| [HBASE-24443](https://issues.apache.org/jira/browse/HBASE-24443) | Refactor TestCustomSaslAuthenticationProvider | Major | test |
| [HBASE-24416](https://issues.apache.org/jira/browse/HBASE-24416) | RegionNormalizer spliting region should not be limited by hbase.normalizer.min.region.count | Major | Normalizer |
| [HBASE-24428](https://issues.apache.org/jira/browse/HBASE-24428) | Priority compaction for recently split daughter regions | Major | Compaction |
| [HBASE-24371](https://issues.apache.org/jira/browse/HBASE-24371) | Add more details when print CompactionConfiguration info | Minor | regionserver |
| [HBASE-24423](https://issues.apache.org/jira/browse/HBASE-24423) | No need to get lock in canSplit because hasReferences will get lock too | Minor | regionserver |
| [HBASE-24369](https://issues.apache.org/jira/browse/HBASE-24369) | Provide more information about merged child regions in Hbck Overlaps section, which cannot be fixed immediately | Major | master |
| [HBASE-24427](https://issues.apache.org/jira/browse/HBASE-24427) | HStore.add log format error | Minor | . |
| [HBASE-24387](https://issues.apache.org/jira/browse/HBASE-24387) | TableSnapshotInputFormatImpl support row limit on each InputSplit | Major | mapreduce |
| [HBASE-24297](https://issues.apache.org/jira/browse/HBASE-24297) | release scripts should be able to use a custom git repo | Major | community, scripts |
| [HBASE-24296](https://issues.apache.org/jira/browse/HBASE-24296) | install yetus as a part of building the rm docker image. | Major | community, scripts |
| [HBASE-24407](https://issues.apache.org/jira/browse/HBASE-24407) | Correct the comment of clusterRegionLocationMocks in TestStochasticLoadBalancer | Minor | Balancer |
| [HBASE-21996](https://issues.apache.org/jira/browse/HBASE-21996) | Set locale for javadoc | Major | documentation |
| [HBASE-24386](https://issues.apache.org/jira/browse/HBASE-24386) | TableSnapshotScanner support scan limit | Major | Scanners, snapshots |
| [HBASE-24164](https://issues.apache.org/jira/browse/HBASE-24164) | Retain the ReadRequests and WriteRequests of region on web UI after alter table | Major | metrics |
| [HBASE-23969](https://issues.apache.org/jira/browse/HBASE-23969) | Meta browser should show all \`info\` columns | Minor | master, UI |
| [HBASE-24313](https://issues.apache.org/jira/browse/HBASE-24313) | [DOCS] Document "ignoreTimestamps" option added to HashTable/SyncTable by HBASE-24302 to related ref-guide section | Major | . |
| [HBASE-24350](https://issues.apache.org/jira/browse/HBASE-24350) | HBase table level replication metrics for shippedBytes are always 0 | Major | Replication |
| [HBASE-24318](https://issues.apache.org/jira/browse/HBASE-24318) | Create-release scripts fixes and enhancements | Major | create-release |
| [HBASE-24256](https://issues.apache.org/jira/browse/HBASE-24256) | When fixOverlap hits the max region limit, it is possible to include the same region in multiple merge request | Major | hbck2 |
| [HBASE-24355](https://issues.apache.org/jira/browse/HBASE-24355) | Fix typos in the HStore#compact annotation | Minor | . |
| [HBASE-24341](https://issues.apache.org/jira/browse/HBASE-24341) | The region should be removed from ConfigurationManager as a ConfigurationObserver when it is closed | Minor | . |
| [HBASE-24321](https://issues.apache.org/jira/browse/HBASE-24321) | Add writable MinVersions and read-only Scan to coproc ScanOptions | Major | . |
| [HBASE-24345](https://issues.apache.org/jira/browse/HBASE-24345) | [ACL] renameRSGroup should require Admin level permission | Major | acl, rsgroup |
| [HBASE-24328](https://issues.apache.org/jira/browse/HBASE-24328) | skip duplicate GCMultipleMergedRegionsProcedure while previous finished | Major | . |
| [HBASE-24335](https://issues.apache.org/jira/browse/HBASE-24335) | Support deleteall with ts but without column in shell mode | Major | shell |
| [HBASE-24334](https://issues.apache.org/jira/browse/HBASE-24334) | Remove duplicated dependency declaration in hbase-hadoop-compat | Trivial | . |
| [HBASE-24304](https://issues.apache.org/jira/browse/HBASE-24304) | Separate a hbase-asyncfs module | Major | build, pom |
| [HBASE-24137](https://issues.apache.org/jira/browse/HBASE-24137) | The max merge count of metafixer may be remind in hbase-site.xml | Minor | . |
| [HBASE-24311](https://issues.apache.org/jira/browse/HBASE-24311) | Add more details in MultiVersionConcurrencyControl STUCK log message | Major | . |
| [HBASE-24317](https://issues.apache.org/jira/browse/HBASE-24317) | Remove deprecated setCacheDataInL1 in HColumnDescriptor | Minor | Client |
| [HBASE-23968](https://issues.apache.org/jira/browse/HBASE-23968) | Periodically check whether a system stop is requested in compaction by time. | Minor | Compaction |
| [HBASE-24302](https://issues.apache.org/jira/browse/HBASE-24302) | Add an "ignoreTimestamps" option (defaulted to false) to HashTable/SyncTable tool | Major | . |
| [HBASE-24266](https://issues.apache.org/jira/browse/HBASE-24266) | Document of Hbase on Aarch64 | Major | documentation |
| [HBASE-24199](https://issues.apache.org/jira/browse/HBASE-24199) | Procedure related metrics is not consumed in the JMX metric | Minor | metrics |
| [HBASE-24278](https://issues.apache.org/jira/browse/HBASE-24278) | The Java doc for minFilesToCompact is wrong | Trivial | . |
| [HBASE-24252](https://issues.apache.org/jira/browse/HBASE-24252) | Implement proxyuser/doAs mechanism for hbase-http | Major | security, UI |
| [HBASE-23264](https://issues.apache.org/jira/browse/HBASE-23264) | Resolve a TODO of BucketAllocator: "Why we add the extra 1024 bytes? Slop?" | Minor | BucketCache |
| [HBASE-24024](https://issues.apache.org/jira/browse/HBASE-24024) | Optionally reject multi() requests with very high no of rows | Major | . |
| [HBASE-24222](https://issues.apache.org/jira/browse/HBASE-24222) | remove FSUtils.checkAccess and replace with FileSystem.access in HBCK | Major | Filesystem Integration |
| [HBASE-24139](https://issues.apache.org/jira/browse/HBASE-24139) | Balancer should avoid leaving idle region servers | Critical | Balancer, Operability |
| [HBASE-24196](https://issues.apache.org/jira/browse/HBASE-24196) | [Shell] Add rename rsgroup command in hbase shell | Major | rsgroup, shell |
| [HBASE-24166](https://issues.apache.org/jira/browse/HBASE-24166) | Duplicate implementation for acquireLock between CreateTableProcedure and its parent class | Minor | proc-v2 |
| [HBASE-24182](https://issues.apache.org/jira/browse/HBASE-24182) | log when the region is set to closing status | Minor | . |
| [HBASE-24148](https://issues.apache.org/jira/browse/HBASE-24148) | Upgrade Thrift to 0.13.0: 0.12.0 has outstanding CVEs. | Major | Thrift |
| [HBASE-24195](https://issues.apache.org/jira/browse/HBASE-24195) | Admin.getRegionServers() should return live servers excluding decom RS optionally | Major | . |
| [HBASE-24112](https://issues.apache.org/jira/browse/HBASE-24112) | [RSGroup] Support renaming rsgroup | Major | rsgroup |
| [HBASE-23994](https://issues.apache.org/jira/browse/HBASE-23994) | Add WebUI to Canary | Trivial | canary, UI, Usability |
| [HBASE-24181](https://issues.apache.org/jira/browse/HBASE-24181) | Add region info when log meessages in HRegion. | Minor | regionserver |
| [HBASE-24153](https://issues.apache.org/jira/browse/HBASE-24153) | Remove unnecessary super() in MultiVersionConcurrencyControl#MultiVersionConcurrencyControl() | Trivial | . |
| [HBASE-24136](https://issues.apache.org/jira/browse/HBASE-24136) | Add release branch report to git-jira-release-audit tool | Minor | . |
| [HBASE-24099](https://issues.apache.org/jira/browse/HBASE-24099) | Use a fair ReentrantReadWriteLock for the region close lock | Major | . |
| [HBASE-24055](https://issues.apache.org/jira/browse/HBASE-24055) | Make AsyncFSWAL can run on EC cluster | Major | wal |
| [HBASE-24077](https://issues.apache.org/jira/browse/HBASE-24077) | When encounter RowTooBigException, log the row info. | Minor | . |
| [HBASE-24111](https://issues.apache.org/jira/browse/HBASE-24111) | Enable CompactionTool executions on non-HDFS filesystems | Major | Compaction, mapreduce, tooling |
| [HBASE-24056](https://issues.apache.org/jira/browse/HBASE-24056) | Improve the layout of our proto files in hbase-protocol-shaded module | Major | Protobufs |
| [HBASE-24021](https://issues.apache.org/jira/browse/HBASE-24021) | Fail fast when bulkLoadHFiles method catch some IOException | Major | HFile, regionserver |
| [HBASE-23678](https://issues.apache.org/jira/browse/HBASE-23678) | Literate builder API for version management in schema | Major | . |
| [HBASE-23983](https://issues.apache.org/jira/browse/HBASE-23983) | Spotbugs warning complain on master build | Major | . |
| [HBASE-8868](https://issues.apache.org/jira/browse/HBASE-8868) | add metric to report client shortcircuit reads | Minor | metrics, regionserver |
| [HBASE-24032](https://issues.apache.org/jira/browse/HBASE-24032) | [RSGroup] Assign created tables to respective rsgroup automatically instead of manual operations | Major | master, rsgroup |
| [HBASE-23967](https://issues.apache.org/jira/browse/HBASE-23967) | Improve the accuracy of the method sizeToString | Minor | . |
| [HBASE-23930](https://issues.apache.org/jira/browse/HBASE-23930) | Shell should attempt to format \`timestamp\` attributes as ISO-8601 | Minor | shell, Usability |
| [HBASE-23929](https://issues.apache.org/jira/browse/HBASE-23929) | Shell formatter for for meta table should pretty-print values of info:merge columns | Minor | shell, Usability |
| [HBASE-23932](https://issues.apache.org/jira/browse/HBASE-23932) | Minor improvements to Region Normalizer | Minor | hbck2, master, Normalizer |
| [HBASE-23939](https://issues.apache.org/jira/browse/HBASE-23939) | Remove unused variables from HBaseSaslRpcServer | Trivial | . |
| [HBASE-22827](https://issues.apache.org/jira/browse/HBASE-22827) | Expose multi-region merge in shell and Admin API | Major | Admin, shell |
| [HBASE-23868](https://issues.apache.org/jira/browse/HBASE-23868) | Replace usages of HColumnDescriptor(byte [] familyName) with builder pattern | Major | . |
| [HBASE-23864](https://issues.apache.org/jira/browse/HBASE-23864) | No need to submit SplitTableRegionProcedure/MergeTableRegionsProcedure when split/merge is disabled | Major | . |
| [HBASE-23309](https://issues.apache.org/jira/browse/HBASE-23309) | Add support in ChainWalEntryFilter to filter Entry if all cells get filtered through WalCellFilter | Major | . |
| [HBASE-22834](https://issues.apache.org/jira/browse/HBASE-22834) | Remove deprecated methods from HBaseTestingUtility | Minor | . |
| [HBASE-23859](https://issues.apache.org/jira/browse/HBASE-23859) | Modify "Block locality" of RegionServer Web UI to human readable percentage | Trivial | . |
| [HBASE-23855](https://issues.apache.org/jira/browse/HBASE-23855) | Change bytes size to human readable size for Server Metrics of RegionServer Web UI | Trivial | . |
| [HBASE-23802](https://issues.apache.org/jira/browse/HBASE-23802) | Remove unnecessary Configuration instantiation in LossyAccounting | Minor | metrics |
| [HBASE-23822](https://issues.apache.org/jira/browse/HBASE-23822) | Fix typo in procedures.jsp | Trivial | website |
| [HBASE-23621](https://issues.apache.org/jira/browse/HBASE-23621) | Reduce number of Checkstyle violations in tests of hbase-common | Minor | . |
| [HBASE-23069](https://issues.apache.org/jira/browse/HBASE-23069) | periodic dependency bump for Sep 2019 | Critical | dependencies |
| [HBASE-23686](https://issues.apache.org/jira/browse/HBASE-23686) | Revert binary incompatible change and remove reflection | Major | . |
| [HBASE-23683](https://issues.apache.org/jira/browse/HBASE-23683) | Make HBaseInterClusterReplicationEndpoint more extensible | Major | Replication |
| [HBASE-23627](https://issues.apache.org/jira/browse/HBASE-23627) | Resolve remaining Checkstyle violations in hbase-thrift | Minor | Thrift |
| [HBASE-21065](https://issues.apache.org/jira/browse/HBASE-21065) | Try ROW\_INDEX\_V1 encoding on meta table (fix bloomfilters on meta while we are at it) | Major | meta, Performance |
| [HBASE-23623](https://issues.apache.org/jira/browse/HBASE-23623) | Reduce number of Checkstyle violations in hbase-rest | Minor | REST |
| [HBASE-23645](https://issues.apache.org/jira/browse/HBASE-23645) | Fix remaining Checkstyle violations in tests of hbase-common | Minor | . |
| [HBASE-23347](https://issues.apache.org/jira/browse/HBASE-23347) | Pluggable RPC authentication | Major | rpc, security |
| [HBASE-23646](https://issues.apache.org/jira/browse/HBASE-23646) | Fix remaining Checkstyle violations in tests of hbase-rest | Minor | . |
| [HBASE-23622](https://issues.apache.org/jira/browse/HBASE-23622) | Reduce number of Checkstyle violations in hbase-common | Minor | . |
| [HBASE-23626](https://issues.apache.org/jira/browse/HBASE-23626) | Reduce number of Checkstyle violations in tests of hbase-common | Minor | . |
| [HBASE-23703](https://issues.apache.org/jira/browse/HBASE-23703) | Add HBase 2.2.3 documentation to website | Major | documentation, website |
| [HBASE-23675](https://issues.apache.org/jira/browse/HBASE-23675) | Move to Apache parent POM version 22 | Minor | dependencies |
| [HBASE-23674](https://issues.apache.org/jira/browse/HBASE-23674) | Too many rit page Numbers show confusion | Trivial | master |
| [HBASE-23688](https://issues.apache.org/jira/browse/HBASE-23688) | Update docs for setting up IntelliJ as a development environment | Minor | documentation |
| [HBASE-23383](https://issues.apache.org/jira/browse/HBASE-23383) | [hbck2] \`fixHoles\` should queue assignment procedures for any regions its fixing | Minor | hbck2, master, Region Assignment |
| [HBASE-23286](https://issues.apache.org/jira/browse/HBASE-23286) | Improve MTTR: Split WAL to HFile | Major | MTTR |
| [HBASE-23635](https://issues.apache.org/jira/browse/HBASE-23635) | Reduce number of Checkstyle violations in hbase-mapreduce | Minor | mapreduce |
| [HBASE-23619](https://issues.apache.org/jira/browse/HBASE-23619) | Use built-in formatting for logging in hbase-zookeeper | Trivial | Zookeeper |
| [HBASE-23165](https://issues.apache.org/jira/browse/HBASE-23165) | [hbtop] Some modifications from HBASE-22988 | Minor | hbtop |
| [HBASE-23668](https://issues.apache.org/jira/browse/HBASE-23668) | Master log start filling with "Flush journal status" messages | Major | proc-v2, RegionProcedureStore |
| [HBASE-23378](https://issues.apache.org/jira/browse/HBASE-23378) | Clean Up FSUtil setClusterId | Minor | . |
| [HBASE-23654](https://issues.apache.org/jira/browse/HBASE-23654) | Please add Apache Trafodion and EsgynDB to "Powered by Apache HBase" page | Major | documentation |
| [HBASE-23651](https://issues.apache.org/jira/browse/HBASE-23651) | Region balance throttling can be disabled | Major | . |
| [HBASE-23333](https://issues.apache.org/jira/browse/HBASE-23333) | Include simple Call.toShortString() in sendCall exceptions | Minor | Client, Operability |
| [HBASE-23629](https://issues.apache.org/jira/browse/HBASE-23629) | Addition to Supporting projects page | Minor | . |
| [HBASE-23632](https://issues.apache.org/jira/browse/HBASE-23632) | DeadServer cleanup | Minor | . |
| [HBASE-23624](https://issues.apache.org/jira/browse/HBASE-23624) | Add a tool to dump the procedure info in HFile | Major | proc-v2 |
| [HBASE-23615](https://issues.apache.org/jira/browse/HBASE-23615) | Use a dedicated thread for executing WorkerMonitor in ProcedureExecutor. | Major | amv2 |
| [HBASE-23618](https://issues.apache.org/jira/browse/HBASE-23618) | Add a tool to dump procedure info in the WAL file | Major | proc-v2 |
| [HBASE-23617](https://issues.apache.org/jira/browse/HBASE-23617) | Add a stress test tool for region based procedure store | Major | proc-v2 |
| [HBASE-23238](https://issues.apache.org/jira/browse/HBASE-23238) | Additional test and checks for null references on ScannerCallableWithReplicas | Minor | . |
| [HBASE-23613](https://issues.apache.org/jira/browse/HBASE-23613) | ProcedureExecutor check StuckWorkers blocked by DeadServerMetricRegionChore | Major | . |
| [HBASE-23326](https://issues.apache.org/jira/browse/HBASE-23326) | Implement a ProcedureStore which stores procedures in a HRegion | Critical | proc-v2 |
| [HBASE-23065](https://issues.apache.org/jira/browse/HBASE-23065) | [hbtop] Top-N heavy hitter user and client drill downs | Major | hbtop, Operability |
| [HBASE-23066](https://issues.apache.org/jira/browse/HBASE-23066) | Create a config that forces to cache blocks on compaction | Minor | Compaction, regionserver |
| [HBASE-23239](https://issues.apache.org/jira/browse/HBASE-23239) | Reporting on status of backing MOB files from client-facing cells | Major | mapreduce, mob, Operability |
| [HBASE-23549](https://issues.apache.org/jira/browse/HBASE-23549) | Document steps to disable MOB for a column family | Minor | documentation, mob |
| [HBASE-22920](https://issues.apache.org/jira/browse/HBASE-22920) | github pr testing job should use dev-support script for gathering machine info | Major | community, test |
| [HBASE-23380](https://issues.apache.org/jira/browse/HBASE-23380) | General Cleanup of FSUtil | Minor | Filesystem Integration |
| [HBASE-23379](https://issues.apache.org/jira/browse/HBASE-23379) | Clean Up FSUtil getRegionLocalityMappingFromFS | Minor | . |
| [HBASE-23377](https://issues.apache.org/jira/browse/HBASE-23377) | Balancer should skip disabled tables's regions | Major | Balancer |
| [HBASE-23373](https://issues.apache.org/jira/browse/HBASE-23373) | Log \`RetriesExhaustedException\` context with full time precision | Minor | asyncclient, Client |
| [HBASE-18382](https://issues.apache.org/jira/browse/HBASE-18382) | [Thrift] Add transport type info to info server | Minor | Thrift |
| [HBASE-23303](https://issues.apache.org/jira/browse/HBASE-23303) | Add security headers to REST server/info page | Major | REST |
| [HBASE-23361](https://issues.apache.org/jira/browse/HBASE-23361) | [UI] Limit two decimals even for total average load | Minor | UI |
| [HBASE-23365](https://issues.apache.org/jira/browse/HBASE-23365) | Minor change MemStoreFlusher's log | Trivial | . |
| [HBASE-23362](https://issues.apache.org/jira/browse/HBASE-23362) | WalPrettyPrinter should include the table name | Minor | tooling |
| [HBASE-23352](https://issues.apache.org/jira/browse/HBASE-23352) | Allow chaos monkeys to access cmd line params, and improve FillDiskCommandAction | Minor | integration tests |
| [HBASE-20395](https://issues.apache.org/jira/browse/HBASE-20395) | Displaying thrift server type on the thrift page | Major | Thrift |
| [HBASE-23293](https://issues.apache.org/jira/browse/HBASE-23293) | [REPLICATION] make ship edits timeout configurable | Minor | Replication |
| [HBASE-23334](https://issues.apache.org/jira/browse/HBASE-23334) | The table-lock node of zk is not needed since HBASE-16786 | Minor | . |
| [HBASE-23325](https://issues.apache.org/jira/browse/HBASE-23325) | [UI]rsgoup average load keep two decimals | Minor | . |
| [HBASE-23321](https://issues.apache.org/jira/browse/HBASE-23321) | [hbck2] fixHoles of fixMeta doesn't update in-memory state | Minor | hbck2 |
| [HBASE-23308](https://issues.apache.org/jira/browse/HBASE-23308) | Review of NullPointerExceptions | Minor | . |
| [HBASE-23315](https://issues.apache.org/jira/browse/HBASE-23315) | Miscellaneous HBCK Report page cleanup | Minor | . |
| [HBASE-23278](https://issues.apache.org/jira/browse/HBASE-23278) | Add a table-level compaction progress display on the UI | Minor | UI |
| [HBASE-23102](https://issues.apache.org/jira/browse/HBASE-23102) | Improper Usage of Map putIfAbsent | Minor | . |
| [HBASE-19450](https://issues.apache.org/jira/browse/HBASE-19450) | Add log about average execution time for ScheduledChore | Minor | Operability |
| [HBASE-23283](https://issues.apache.org/jira/browse/HBASE-23283) | Provide clear and consistent logging about the period of enabled chores | Minor | Operability |
| [HBASE-23245](https://issues.apache.org/jira/browse/HBASE-23245) | All MutableHistogram implementations should remove maxExpected | Major | metrics |
| [HBASE-23251](https://issues.apache.org/jira/browse/HBASE-23251) | Add Column Family and Table Names to HFileContext and use in HFileWriterImpl logging | Major | . |
| [HBASE-23228](https://issues.apache.org/jira/browse/HBASE-23228) | Allow for jdk8 specific modules on branch-1 in precommit/nightly testing | Critical | build, test |
| [HBASE-23212](https://issues.apache.org/jira/browse/HBASE-23212) | Provide config reload for Auto Region Reopen based on storeFile ref count | Major | . |
| [HBASE-23221](https://issues.apache.org/jira/browse/HBASE-23221) | Polish the WAL interface after HBASE-23181 | Major | regionserver, wal |
| [HBASE-23191](https://issues.apache.org/jira/browse/HBASE-23191) | Log spams on Replication | Trivial | Replication |
| [HBASE-23208](https://issues.apache.org/jira/browse/HBASE-23208) | Unit formatting in Master & RS UI | Trivial | UI |
| [HBASE-23207](https://issues.apache.org/jira/browse/HBASE-23207) | Log a region open journal | Minor | . |
| [HBASE-22679](https://issues.apache.org/jira/browse/HBASE-22679) | Remove all deprecated methods of CellUtil | Major | . |
| [HBASE-23172](https://issues.apache.org/jira/browse/HBASE-23172) | HBase Canary region success count metrics reflect column family successes, not region successes | Minor | canary |
| [HBASE-23170](https://issues.apache.org/jira/browse/HBASE-23170) | Admin#getRegionServers use ClusterMetrics.Option.SERVERS\_NAME | Major | . |
| [HBASE-23107](https://issues.apache.org/jira/browse/HBASE-23107) | Avoid temp byte array creation when doing cacheDataOnWrite | Major | BlockCache, HFile |
| [HBASE-20626](https://issues.apache.org/jira/browse/HBASE-20626) | Change the value of "Requests Per Second" on WEBUI | Major | metrics, UI |
| [HBASE-23093](https://issues.apache.org/jira/browse/HBASE-23093) | Avoid Optional Anti-Pattern where possible | Minor | . |
| [HBASE-23083](https://issues.apache.org/jira/browse/HBASE-23083) | Collect Executor status info periodically and report to metrics system | Major | . |
| [HBASE-23145](https://issues.apache.org/jira/browse/HBASE-23145) | Remove out-of-date comments in StoreFlusher.java | Trivial | documentation |
| [HBASE-23017](https://issues.apache.org/jira/browse/HBASE-23017) | [Forward-port] Verify the file integrity in persistent IOEngine | Major | BucketCache |
| [HBASE-23114](https://issues.apache.org/jira/browse/HBASE-23114) | Use archiveArtifacts in Jenkinsfiles | Trivial | . |
| [HBASE-23140](https://issues.apache.org/jira/browse/HBASE-23140) | Remove unknown table error | Minor | . |
| [HBASE-23095](https://issues.apache.org/jira/browse/HBASE-23095) | Reuse FileStatus in StoreFileInfo | Major | mob, snapshots |
| [HBASE-23031](https://issues.apache.org/jira/browse/HBASE-23031) | Upgrade Yetus version in RM scripts | Minor | hbase-operator-tools |
| [HBASE-23116](https://issues.apache.org/jira/browse/HBASE-23116) | LoadBalancer should log table name when balancing per table | Minor | . |
| [HBASE-22874](https://issues.apache.org/jira/browse/HBASE-22874) | Define a public interface for Canary and move existing implementation to LimitedPrivate | Critical | canary |
| [HBASE-23118](https://issues.apache.org/jira/browse/HBASE-23118) | [RELEASE SCRIPTS] Allow creating a RC from an existing tag | Major | scripts |
| [HBASE-22930](https://issues.apache.org/jira/browse/HBASE-22930) | Set unique name to longCompactions/shortCompactions threads | Minor | . |
| [HBASE-23035](https://issues.apache.org/jira/browse/HBASE-23035) | Retain region to the last RegionServer make the failover slower | Major | amv2 |
| [HBASE-23038](https://issues.apache.org/jira/browse/HBASE-23038) | Provide consistent and clear logging about disabling chores | Minor | master, regionserver |
| [HBASE-23075](https://issues.apache.org/jira/browse/HBASE-23075) | Upgrade jackson to version 2.9.10 due to CVE-2019-16335 and CVE-2019-14540 | Major | dependencies, hbase-connectors, REST, security |
| [HBASE-22975](https://issues.apache.org/jira/browse/HBASE-22975) | Add read and write QPS metrics at server level and table level | Minor | metrics |
| [HBASE-23058](https://issues.apache.org/jira/browse/HBASE-23058) | Should be "Column Family Name" in table.jsp | Minor | . |
| [HBASE-22027](https://issues.apache.org/jira/browse/HBASE-22027) | Move non-MR parts of TokenUtil into hbase-client | Major | . |
| [HBASE-23049](https://issues.apache.org/jira/browse/HBASE-23049) | TableDescriptors#getAll should return the tables ordering by the name which contain namespace | Minor | . |
| [HBASE-23041](https://issues.apache.org/jira/browse/HBASE-23041) | Should not show split parent regions in HBCK report's unknown server part | Major | . |
| [HBASE-23044](https://issues.apache.org/jira/browse/HBASE-23044) | CatalogJanitor#cleanMergeQualifier may clean wrong parent regions | Critical | . |
| [HBASE-23037](https://issues.apache.org/jira/browse/HBASE-23037) | Make the split WAL related log more readable | Minor | . |
| [HBASE-22846](https://issues.apache.org/jira/browse/HBASE-22846) | Internal Error 500 when Using HBASE REST API to Create Namespace. | Major | hbase-connectors |
| [HBASE-22804](https://issues.apache.org/jira/browse/HBASE-22804) | Provide an API to get list of successful regions and total expected regions in Canary | Minor | canary |
| [HBASE-22899](https://issues.apache.org/jira/browse/HBASE-22899) | logging improvements for snapshot operations w/large manifests | Minor | snapshots |
| [HBASE-22760](https://issues.apache.org/jira/browse/HBASE-22760) | Stop/Resume Snapshot Auto-Cleanup activity with shell command | Major | Admin, shell, snapshots |
| [HBASE-22802](https://issues.apache.org/jira/browse/HBASE-22802) | Avoid temp ByteBuffer allocation in FileIOEngine#read | Major | BucketCache |
| [HBASE-21879](https://issues.apache.org/jira/browse/HBASE-21879) | Read HFile's block to ByteBuffer directly instead of to byte for reducing young gc purpose | Major | . |
| [HBASE-22724](https://issues.apache.org/jira/browse/HBASE-22724) | Add a emoji on the vote table for pre commit result on github | Major | build, test |
| [HBASE-22954](https://issues.apache.org/jira/browse/HBASE-22954) | Whitelist net.java.dev.jna which got pulled in through Hadoop 3.3.0 | Minor | community, hadoop3 |
| [HBASE-22905](https://issues.apache.org/jira/browse/HBASE-22905) | Avoid temp ByteBuffer allocation in BlockingRpcConnection#writeRequest | Major | . |
| [HBASE-22962](https://issues.apache.org/jira/browse/HBASE-22962) | Fix typo in javadoc description | Minor | documentation |
| [HBASE-22933](https://issues.apache.org/jira/browse/HBASE-22933) | Do not need to kick reassign for rs group change any more | Major | rsgroup |
| [HBASE-22618](https://issues.apache.org/jira/browse/HBASE-22618) | added the possibility to load custom cost functions | Major | . |
| [HBASE-22883](https://issues.apache.org/jira/browse/HBASE-22883) | Duplacate codes of method Threads.newDaemonThreadFactory() and class DaemonThreadFactory | Minor | . |
| [HBASE-22872](https://issues.apache.org/jira/browse/HBASE-22872) | Don't create normalization plan unnecesarily when split and merge both are disabled | Minor | . |
| [HBASE-22744](https://issues.apache.org/jira/browse/HBASE-22744) | Remove deprecated classes around status and load | Major | Client |
| [HBASE-20509](https://issues.apache.org/jira/browse/HBASE-20509) | Put List in HashSet directly without using addAll function to improve performance | Trivial | Performance |
| [HBASE-22755](https://issues.apache.org/jira/browse/HBASE-22755) | Remove deprecated methods from Mutation | Trivial | Client |
| [HBASE-22464](https://issues.apache.org/jira/browse/HBASE-22464) | Improvements to hbase-vote script | Trivial | scripts |
| [HBASE-22810](https://issues.apache.org/jira/browse/HBASE-22810) | Initialize an separate ThreadPoolExecutor for taking/restoring snapshot | Major | . |
| [HBASE-22844](https://issues.apache.org/jira/browse/HBASE-22844) | Fix Checkstyle issues in client snapshot exceptions | Minor | Client |
| [HBASE-22871](https://issues.apache.org/jira/browse/HBASE-22871) | Move the DirScanPool out and do not use static field | Major | master |
| [HBASE-22841](https://issues.apache.org/jira/browse/HBASE-22841) | TimeRange's factory functions do not support ranges, only \`allTime\` and \`at\` | Major | Client |
| [HBASE-22828](https://issues.apache.org/jira/browse/HBASE-22828) | Log a region close journal | Minor | . |
| [HBASE-22829](https://issues.apache.org/jira/browse/HBASE-22829) | Remove deprecated methods from SnapshotDescription | Trivial | Client |
| [HBASE-22830](https://issues.apache.org/jira/browse/HBASE-22830) | Remove deprecated method from StoreFile | Trivial | . |
| [HBASE-22832](https://issues.apache.org/jira/browse/HBASE-22832) | Remove deprecated method in HFileOutputFormat2 | Trivial | mapreduce |
| [HBASE-22831](https://issues.apache.org/jira/browse/HBASE-22831) | Remove deprecated constructor from TableRecordWriter | Trivial | mapreduce |
| [HBASE-22543](https://issues.apache.org/jira/browse/HBASE-22543) | Revisit HBASE-21207 to make all values fully sortable | Minor | master, monitoring, Operability, UI, Usability |
| [HBASE-22812](https://issues.apache.org/jira/browse/HBASE-22812) | InterfaceAudience annotation in CatalogJanitor uses fully-qualified name | Minor | . |
| [HBASE-22800](https://issues.apache.org/jira/browse/HBASE-22800) | Add mapreduce dependencies to hbase-shaded-testing-util | Major | . |
| [HBASE-22731](https://issues.apache.org/jira/browse/HBASE-22731) | ReplicationSource and HBaseInterClusterReplicationEndpoint log messages should include a target Peer identifier | Minor | Replication |
| [HBASE-22759](https://issues.apache.org/jira/browse/HBASE-22759) | Add user info to AUDITLOG events when doing grant/revoke | Major | logging, security |
| [HBASE-22789](https://issues.apache.org/jira/browse/HBASE-22789) | Remove deprecated method from ImmutableBytesWritable | Trivial | . |
| [HBASE-22785](https://issues.apache.org/jira/browse/HBASE-22785) | Reduce number of Checkstyle issues in client exceptions | Minor | Client |
| [HBASE-22786](https://issues.apache.org/jira/browse/HBASE-22786) | Fix Checkstyle issues in tests of hbase-client | Minor | Client |
| [HBASE-22788](https://issues.apache.org/jira/browse/HBASE-22788) | Remove deprecated methods from Bytes | Minor | . |
| [HBASE-22790](https://issues.apache.org/jira/browse/HBASE-22790) | Add deprecation version for hbase.ipc.server.reservoir.initial.buffer.size & hbase.ipc.server.reservoir.initial.max | Trivial | . |
| [HBASE-22609](https://issues.apache.org/jira/browse/HBASE-22609) | [Docs] More detail documentation about "hbase.server.thread.wakefrequency" | Minor | documentation |
| [HBASE-22677](https://issues.apache.org/jira/browse/HBASE-22677) | Add unit tests for org.apache.hadoop.hbase.util.ByteRangeUtils and org.apache.hadoop.hbase.util.Classes | Major | java, test |
| [HBASE-22787](https://issues.apache.org/jira/browse/HBASE-22787) | Clean up of tests in hbase-zookeeper | Minor | Zookeeper |
| [HBASE-22707](https://issues.apache.org/jira/browse/HBASE-22707) | [HBCK2] MasterRpcServices assigns method should try to reload regions from meta if the passed regions isn't found under AssignmentManager RegionsStateStore | Major | hbck2, master |
| [HBASE-22363](https://issues.apache.org/jira/browse/HBASE-22363) | Remove hardcoded number of read cache block buckets | Trivial | BlockCache, BucketCache |
| [HBASE-22753](https://issues.apache.org/jira/browse/HBASE-22753) | Remove deprecated ImmutableHRegionInfo | Trivial | Client |
| [HBASE-22764](https://issues.apache.org/jira/browse/HBASE-22764) | Fix remaining Checkstyle issues in hbase-rsgroup | Trivial | rsgroup |
| [HBASE-22752](https://issues.apache.org/jira/browse/HBASE-22752) | Remove deprecated ImmutableHColumnDescriptor & ImmutableHTableDescriptor | Trivial | Client |
| [HBASE-22763](https://issues.apache.org/jira/browse/HBASE-22763) | Fix remaining Checkstyle issue in hbase-procedure | Trivial | . |
| [HBASE-22746](https://issues.apache.org/jira/browse/HBASE-22746) | Remove deprecated methods from Delete | Trivial | Client |
| [HBASE-22754](https://issues.apache.org/jira/browse/HBASE-22754) | Remove deprecated methods from Increment | Trivial | Client |
| [HBASE-22756](https://issues.apache.org/jira/browse/HBASE-22756) | Remove deprecated method from SingleColumnValueFilter | Trivial | Client |
| [HBASE-22748](https://issues.apache.org/jira/browse/HBASE-22748) | Remove deprecated methods from Put | Trivial | Client |
| [HBASE-22743](https://issues.apache.org/jira/browse/HBASE-22743) | ClientUtils for hbase-examples | Minor | . |
| [HBASE-22745](https://issues.apache.org/jira/browse/HBASE-22745) | Remove deprecated methods from Append | Trivial | Client |
| [HBASE-22702](https://issues.apache.org/jira/browse/HBASE-22702) | [Log] 'Group not found for table' is chatty | Trivial | . |
| [HBASE-22628](https://issues.apache.org/jira/browse/HBASE-22628) | Document the custom WAL directory (hbase.wal.dir) usage | Major | documentation, wal |
| [HBASE-22721](https://issues.apache.org/jira/browse/HBASE-22721) | Refactor HBaseFsck: move the inner class out | Major | . |
| [HBASE-22692](https://issues.apache.org/jira/browse/HBASE-22692) | Rubocop definition is not used in the /bin directory | Minor | . |
| [HBASE-22610](https://issues.apache.org/jira/browse/HBASE-22610) | [BucketCache] Rename "hbase.offheapcache.minblocksize" | Trivial | . |
| [HBASE-22690](https://issues.apache.org/jira/browse/HBASE-22690) | Deprecate / Remove OfflineMetaRepair in hbase-2+ | Major | hbck2 |
| [HBASE-22704](https://issues.apache.org/jira/browse/HBASE-22704) | Avoid NPE when access table.jsp and snapshot.jsp but master not finish initialization | Minor | . |
| [HBASE-21462](https://issues.apache.org/jira/browse/HBASE-21462) | Add note for CopyTable section explained it does not perform a diff, but a full write from source to target | Minor | documentation |
| [HBASE-22643](https://issues.apache.org/jira/browse/HBASE-22643) | Delete region without archiving only if regiondir is present | Major | HFile |
| [HBASE-22689](https://issues.apache.org/jira/browse/HBASE-22689) | Line break for fix version in documentation | Trivial | documentation |
| [HBASE-22638](https://issues.apache.org/jira/browse/HBASE-22638) | Zookeeper Utility enhancements | Minor | Zookeeper |
| [HBASE-7129](https://issues.apache.org/jira/browse/HBASE-7129) | Need documentation for REST atomic operations (HBASE-4720) | Minor | documentation, REST |
| [HBASE-22669](https://issues.apache.org/jira/browse/HBASE-22669) | Add unit tests for org.apache.hadoop.hbase.util.Strings | Major | java |
| [HBASE-22403](https://issues.apache.org/jira/browse/HBASE-22403) | Balance in RSGroup should consider throttling and a failure affects the whole | Major | rsgroup |
| [HBASE-22604](https://issues.apache.org/jira/browse/HBASE-22604) | fix the link in the docs to "Understanding HBase and BigTable" by Jim R. Wilson | Trivial | documentation |
| [HBASE-22624](https://issues.apache.org/jira/browse/HBASE-22624) | Should sanity check table configuration when clone snapshot to a new table | Major | . |
| [HBASE-22633](https://issues.apache.org/jira/browse/HBASE-22633) | Remove redundant call to substring for ZKReplicationQueueStorage | Minor | . |
| [HBASE-22595](https://issues.apache.org/jira/browse/HBASE-22595) | Use full qualified name in Checkstyle suppressions | Trivial | . |
| [HBASE-22454](https://issues.apache.org/jira/browse/HBASE-22454) | refactor WALSplitter | Major | wal |
| [HBASE-22616](https://issues.apache.org/jira/browse/HBASE-22616) | responseTooXXX logging for Multi should characterize the component ops | Minor | . |
| [HBASE-22596](https://issues.apache.org/jira/browse/HBASE-22596) | [Chore] Separate the execution period between CompactionChecker and PeriodicMemStoreFlusher | Minor | Compaction |
| [HBASE-22561](https://issues.apache.org/jira/browse/HBASE-22561) | modify HFilePrettyPrinter to accept non-hbase.rootdir directories | Minor | . |
| [HBASE-22344](https://issues.apache.org/jira/browse/HBASE-22344) | Document deprecated public APIs | Major | API, community, documentation |
| [HBASE-22593](https://issues.apache.org/jira/browse/HBASE-22593) | Add local Jenv file to gitignore | Trivial | . |
| [HBASE-19303](https://issues.apache.org/jira/browse/HBASE-19303) | Cleanup the usage of deprecated ReplicationAdmin | Major | . |
| [HBASE-22116](https://issues.apache.org/jira/browse/HBASE-22116) | HttpDoAsClient to support keytab and principal in command line argument. | Major | . |
| [HBASE-22160](https://issues.apache.org/jira/browse/HBASE-22160) | Add sorting functionality in regionserver web UI for user regions | Minor | monitoring, regionserver, UI, Usability |
| [HBASE-22395](https://issues.apache.org/jira/browse/HBASE-22395) | Document RC voting guidelines in ref guide | Major | community, documentation |
| [HBASE-22284](https://issues.apache.org/jira/browse/HBASE-22284) | optimization StringBuilder.append of AbstractMemStore.toString | Trivial | . |
| [HBASE-21415](https://issues.apache.org/jira/browse/HBASE-21415) | Admin#snapshot method documentation is misleading. | Trivial | documentation |
| [HBASE-22523](https://issues.apache.org/jira/browse/HBASE-22523) | Refactor RegionStates#getAssignmentsByTable to make it easy to understand | Major | . |
| [HBASE-22511](https://issues.apache.org/jira/browse/HBASE-22511) | More missing /rs-status links | Minor | UI |
| [HBASE-22459](https://issues.apache.org/jira/browse/HBASE-22459) | Expose store reader reference count | Minor | HFile, metrics, regionserver |
| [HBASE-22496](https://issues.apache.org/jira/browse/HBASE-22496) | UnsafeAccess.unsafeCopy should not copy more than UNSAFE\_COPY\_THRESHOLD on each iteration | Major | . |
| [HBASE-22488](https://issues.apache.org/jira/browse/HBASE-22488) | Cleanup the explicit timeout value for test methods | Major | . |
| [HBASE-22411](https://issues.apache.org/jira/browse/HBASE-22411) | Refactor codes of moving reigons in RSGroup | Major | rsgroup |
| [HBASE-22467](https://issues.apache.org/jira/browse/HBASE-22467) | WebUI changes to enable Apache Knox UI proxying | Major | UI |
| [HBASE-22469](https://issues.apache.org/jira/browse/HBASE-22469) | replace md5 checksum in saveVersion script with sha512 for hbase version information | Minor | . |
| [HBASE-22474](https://issues.apache.org/jira/browse/HBASE-22474) | Add --mvn-custom-repo parameter to yetus calls | Minor | . |
| [HBASE-22443](https://issues.apache.org/jira/browse/HBASE-22443) | Add hbase-vote script details to documentation | Minor | documentation |
| [HBASE-20305](https://issues.apache.org/jira/browse/HBASE-20305) | Add option to SyncTable that skip deletes on target cluster | Minor | mapreduce |
| [HBASE-21784](https://issues.apache.org/jira/browse/HBASE-21784) | Dump replication queue should show list of wal files ordered chronologically | Major | Replication, tooling |
| [HBASE-22384](https://issues.apache.org/jira/browse/HBASE-22384) | Formatting issues in administration section of book | Minor | community, documentation |
| [HBASE-22377](https://issues.apache.org/jira/browse/HBASE-22377) | Provide API to check the existence of a namespace which does not require ADMIN permissions | Major | . |
| [HBASE-21658](https://issues.apache.org/jira/browse/HBASE-21658) | Should get the meta replica number from zk instead of config at client side | Critical | Client |
| [HBASE-22365](https://issues.apache.org/jira/browse/HBASE-22365) | Region may be opened on two RegionServers | Blocker | amv2 |
| [HBASE-22392](https://issues.apache.org/jira/browse/HBASE-22392) | Remove extra/useless + | Trivial | . |
| [HBASE-20494](https://issues.apache.org/jira/browse/HBASE-20494) | Upgrade com.yammer.metrics dependency | Major | dependencies |
| [HBASE-22358](https://issues.apache.org/jira/browse/HBASE-22358) | Change rubocop configuration for method length | Minor | community, shell |
| [HBASE-22379](https://issues.apache.org/jira/browse/HBASE-22379) | Fix Markdown for "Voting on Release Candidates" in book | Minor | community, documentation |
| [HBASE-22109](https://issues.apache.org/jira/browse/HBASE-22109) | Update hbase shaded content checker after guava update in hadoop branch-3.0 to 27.0-jre | Minor | . |
| [HBASE-22087](https://issues.apache.org/jira/browse/HBASE-22087) | Update LICENSE/shading for the dependencies from the latest Hadoop trunk | Minor | hadoop3 |
| [HBASE-22301](https://issues.apache.org/jira/browse/HBASE-22301) | Consider rolling the WAL if the HDFS write pipeline is slow | Minor | wal |
| [HBASE-21883](https://issues.apache.org/jira/browse/HBASE-21883) | Enhancements to Major Compaction tool | Minor | Client, Compaction, tooling |
| [HBASE-22341](https://issues.apache.org/jira/browse/HBASE-22341) | Add explicit guidelines for removing deprecations in book | Major | API, community, documentation |
| [HBASE-22225](https://issues.apache.org/jira/browse/HBASE-22225) | Profiler tab on Master/RS UI not working w/o comprehensive message | Minor | UI |
| [HBASE-14789](https://issues.apache.org/jira/browse/HBASE-14789) | Enhance the current spark-hbase connector | Major | hbase-connectors, spark |
| [HBASE-22291](https://issues.apache.org/jira/browse/HBASE-22291) | Fix recovery of recovered.edits files under root dir | Major | . |
| [HBASE-22283](https://issues.apache.org/jira/browse/HBASE-22283) | Print row and table information when failed to get region location | Major | Client, logging |
| [HBASE-22296](https://issues.apache.org/jira/browse/HBASE-22296) | Remove TestFromClientSide.testGetStartEndKeysWithRegionReplicas | Major | test |
| [HBASE-22250](https://issues.apache.org/jira/browse/HBASE-22250) | The same constants used in many places should be placed in constant classes | Minor | Client, conf, regionserver |
| [HBASE-22279](https://issues.apache.org/jira/browse/HBASE-22279) | Add a getRegionLocator method in Table/AsyncTable interface | Major | asyncclient, Client |
| [HBASE-15560](https://issues.apache.org/jira/browse/HBASE-15560) | TinyLFU-based BlockCache | Major | BlockCache |
| [HBASE-20586](https://issues.apache.org/jira/browse/HBASE-20586) | SyncTable tool: Add support for cross-realm remote clusters | Major | mapreduce, Operability, Replication |
| [HBASE-21257](https://issues.apache.org/jira/browse/HBASE-21257) | misspelled words.[occured -\> occurred] | Trivial | . |
| [HBASE-22193](https://issues.apache.org/jira/browse/HBASE-22193) | Add backoff when region failed open too many times | Major | . |
| [HBASE-22188](https://issues.apache.org/jira/browse/HBASE-22188) | Make TestSplitMerge more stable | Major | test |
| [HBASE-21148](https://issues.apache.org/jira/browse/HBASE-21148) | [Docs] Some errors in section#Security Configuration Example of hbase book | Minor | documentation |
| [HBASE-21918](https://issues.apache.org/jira/browse/HBASE-21918) | the use cases in doc should use Cell instead of KeyValue | Trivial | documentation |
| [HBASE-22082](https://issues.apache.org/jira/browse/HBASE-22082) | Should not use an instance to access static members, which will increases compilation costs. | Minor | regionserver |
| [HBASE-22097](https://issues.apache.org/jira/browse/HBASE-22097) | Modify the description of split command in shell | Trivial | shell |
| [HBASE-21964](https://issues.apache.org/jira/browse/HBASE-21964) | unset Quota by Throttle Type | Major | master |
| [HBASE-22093](https://issues.apache.org/jira/browse/HBASE-22093) | Combine TestRestoreSnapshotFromClientWithRegionReplicas to CloneSnapshotFromClientAfterSplittingRegionTestBase#testCloneSnapshotAfterSplittingRegion | Major | . |
| [HBASE-22009](https://issues.apache.org/jira/browse/HBASE-22009) | Improve RSGroupInfoManagerImpl#getDefaultServers() | Minor | rsgroup |
| [HBASE-22077](https://issues.apache.org/jira/browse/HBASE-22077) | Expose sleep time as a command line argument of IntergationTestBackupRestore | Minor | test |
| [HBASE-22032](https://issues.apache.org/jira/browse/HBASE-22032) | KeyValue validation should check for null byte array | Major | . |
| [HBASE-21667](https://issues.apache.org/jira/browse/HBASE-21667) | Move to latest ASF Parent POM | Minor | build |
| [HBASE-21810](https://issues.apache.org/jira/browse/HBASE-21810) | bulkload support set hfile compression on client | Major | mapreduce |
| [HBASE-21987](https://issues.apache.org/jira/browse/HBASE-21987) | Simplify RSGroupInfoManagerImpl#flushConfig() for offline mode | Minor | rsgroup |
| [HBASE-21871](https://issues.apache.org/jira/browse/HBASE-21871) | Support to specify a peer table name in VerifyReplication tool | Major | . |
| [HBASE-21255](https://issues.apache.org/jira/browse/HBASE-21255) | [acl] Refactor TablePermission into three classes (Global, Namespace, Table) | Major | . |
| [HBASE-21410](https://issues.apache.org/jira/browse/HBASE-21410) | A helper page that help find all problematic regions and procedures | Major | . |
| [HBASE-20734](https://issues.apache.org/jira/browse/HBASE-20734) | Colocate recovered edits directory with hbase.wal.dir | Major | MTTR, Recovery, wal |
| [HBASE-20401](https://issues.apache.org/jira/browse/HBASE-20401) | Make \`MAX\_WAIT\` and \`waitIfNotFinished\` in CleanerContext configurable | Minor | master |
| [HBASE-21481](https://issues.apache.org/jira/browse/HBASE-21481) | [acl] Superuser's permissions should not be granted or revoked by any non-su global admin | Major | . |
| [HBASE-21967](https://issues.apache.org/jira/browse/HBASE-21967) | Split TestServerCrashProcedure and TestServerCrashProcedureWithReplicas | Major | . |
| [HBASE-21867](https://issues.apache.org/jira/browse/HBASE-21867) | Support multi-threads in HFileArchiver | Major | . |
| [HBASE-21932](https://issues.apache.org/jira/browse/HBASE-21932) | Use Runtime.getRuntime().halt to terminate regionserver when abort timeout | Major | . |
| [HBASE-21875](https://issues.apache.org/jira/browse/HBASE-21875) | Change the retry logic in RSProcedureDispatcher to 'retry by default, only if xxx' | Major | proc-v2 |
| [HBASE-21780](https://issues.apache.org/jira/browse/HBASE-21780) | Avoid a wide line on the RegionServer webUI for many ZooKeeper servers | Minor | UI, Usability |
| [HBASE-21636](https://issues.apache.org/jira/browse/HBASE-21636) | Enhance the shell scan command to support missing scanner specifications like ReadType, IsolationLevel etc. | Major | shell |
| [HBASE-21857](https://issues.apache.org/jira/browse/HBASE-21857) | Do not need to check clusterKey if replicationEndpoint is provided when adding a peer | Major | . |
| [HBASE-21201](https://issues.apache.org/jira/browse/HBASE-21201) | Support to run VerifyReplication MR tool without peerid | Major | hbase-operator-tools |
| [HBASE-21816](https://issues.apache.org/jira/browse/HBASE-21816) | Print source cluster replication config directory | Trivial | Replication |
| [HBASE-19616](https://issues.apache.org/jira/browse/HBASE-19616) | Review of LogCleaner Class | Minor | . |
| [HBASE-21833](https://issues.apache.org/jira/browse/HBASE-21833) | Use NettyAsyncFSWALConfigHelper.setEventLoopConfig to prevent creating too many netty event loop when executing TestHRegion | Minor | test |
| [HBASE-21808](https://issues.apache.org/jira/browse/HBASE-21808) | Ensure we can build with JDK11 targetting JDK8 | Major | build, community, java |
| [HBASE-21684](https://issues.apache.org/jira/browse/HBASE-21684) | Throw DNRIOE when connection or rpc client is closed | Major | asyncclient, Client |
| [HBASE-21634](https://issues.apache.org/jira/browse/HBASE-21634) | Print error message when user uses unacceptable values for LIMIT while setting quotas. | Minor | . |
| [HBASE-21806](https://issues.apache.org/jira/browse/HBASE-21806) | add an option to roll WAL on very slow syncs | Major | . |
| [HBASE-21790](https://issues.apache.org/jira/browse/HBASE-21790) | Detail docs on ref guide for CompactionTool | Major | documentation |
| [HBASE-21789](https://issues.apache.org/jira/browse/HBASE-21789) | Rewrite MetaTableAccessor.multiMutate with Table.coprocessorService | Major | Client, Coprocessors |
| [HBASE-21741](https://issues.apache.org/jira/browse/HBASE-21741) | Add a note in "HFile Tool" section regarding 'seqid=0' | Minor | documentation |
| [HBASE-21689](https://issues.apache.org/jira/browse/HBASE-21689) | Make table/namespace specific current quota info available in shell(describe\_namespace & describe) | Minor | . |
| [HBASE-20215](https://issues.apache.org/jira/browse/HBASE-20215) | Rename CollectionUtils to ConcurrentMapUtils | Trivial | . |
| [HBASE-21720](https://issues.apache.org/jira/browse/HBASE-21720) | metric to measure how actions are distributed to servers within a MultiAction | Minor | Client, metrics, monitoring |
| [HBASE-21737](https://issues.apache.org/jira/browse/HBASE-21737) | Fix "Appendix A: HFile format" section in the doc | Minor | documentation |
| [HBASE-21595](https://issues.apache.org/jira/browse/HBASE-21595) | Print thread's information and stack traces when RS is aborting forcibly | Minor | regionserver |
| [HBASE-20209](https://issues.apache.org/jira/browse/HBASE-20209) | Do Not Use Both Map containsKey and get Methods in Replication Sink | Trivial | Replication |
| [HBASE-21712](https://issues.apache.org/jira/browse/HBASE-21712) | Make submit-patch.py python3 compatible | Minor | tooling |
| [HBASE-21590](https://issues.apache.org/jira/browse/HBASE-21590) | Optimize trySkipToNextColumn in StoreScanner a bit | Critical | Performance, Scanners |
| [HBASE-21297](https://issues.apache.org/jira/browse/HBASE-21297) | ModifyTableProcedure can throw TNDE instead of IOE in case of REGION\_REPLICATION change | Minor | . |
| [HBASE-21700](https://issues.apache.org/jira/browse/HBASE-21700) | Simplify the implementation of RSGroupInfoManagerImpl | Major | rsgroup |
| [HBASE-21694](https://issues.apache.org/jira/browse/HBASE-21694) | Add append\_peer\_exclude\_tableCFs and remove\_peer\_exclude\_tableCFs shell commands | Major | . |
| [HBASE-21645](https://issues.apache.org/jira/browse/HBASE-21645) | Perform sanity check and disallow table creation/modification with region replication \< 1 | Minor | . |
| [HBASE-21360](https://issues.apache.org/jira/browse/HBASE-21360) | Disable printing of stack-trace in shell for quotas | Minor | shell |
| [HBASE-21662](https://issues.apache.org/jira/browse/HBASE-21662) | Add append\_peer\_exclude\_namespaces and remove\_peer\_exclude\_namespaces shell commands | Major | . |
| [HBASE-21659](https://issues.apache.org/jira/browse/HBASE-21659) | Avoid to load duplicate coprocessors in system config and table descriptor | Minor | . |
| [HBASE-21642](https://issues.apache.org/jira/browse/HBASE-21642) | CopyTable by reading snapshot and bulkloading will save a lot of time. | Major | . |
| [HBASE-21643](https://issues.apache.org/jira/browse/HBASE-21643) | Introduce two new region coprocessor method and deprecated postMutationBeforeWAL | Major | . |
| [HBASE-21640](https://issues.apache.org/jira/browse/HBASE-21640) | Remove the TODO when increment zero | Major | . |
| [HBASE-21631](https://issues.apache.org/jira/browse/HBASE-21631) | list\_quotas should print human readable values for LIMIT | Minor | shell |
| [HBASE-21635](https://issues.apache.org/jira/browse/HBASE-21635) | Use maven enforcer to ban imports from illegal packages | Major | build |
| [HBASE-21514](https://issues.apache.org/jira/browse/HBASE-21514) | Refactor CacheConfig | Major | . |
| [HBASE-21520](https://issues.apache.org/jira/browse/HBASE-21520) | TestMultiColumnScanner cost long time when using ROWCOL bloom type | Major | test |
| [HBASE-21554](https://issues.apache.org/jira/browse/HBASE-21554) | Show replication endpoint classname for replication peer on master web UI | Minor | UI |
| [HBASE-21549](https://issues.apache.org/jira/browse/HBASE-21549) | Add shell command for serial replication peer | Major | . |
| [HBASE-21283](https://issues.apache.org/jira/browse/HBASE-21283) | Add new shell command 'rit' for listing regions in transition | Minor | Operability, shell |
| [HBASE-21567](https://issues.apache.org/jira/browse/HBASE-21567) | Allow overriding configs starting up the shell | Major | shell |
| [HBASE-21560](https://issues.apache.org/jira/browse/HBASE-21560) | Return a new TableDescriptor for MasterObserver#preModifyTable to allow coprocessor modify the TableDescriptor | Major | Coprocessors |
| [HBASE-21413](https://issues.apache.org/jira/browse/HBASE-21413) | Empty meta log doesn't get split when restart whole cluster | Major | . |
| [HBASE-21414](https://issues.apache.org/jira/browse/HBASE-21414) | StoreFileSize growth rate metric | Minor | metrics, monitoring |
| [HBASE-21524](https://issues.apache.org/jira/browse/HBASE-21524) | Unnecessary DEBUG log in ConnectionImplementation#isTableEnabled | Major | Client |
| [HBASE-21523](https://issues.apache.org/jira/browse/HBASE-21523) | Chatty DEBUG logging in Master log | Major | backup&restore |
| [HBASE-21154](https://issues.apache.org/jira/browse/HBASE-21154) | Remove hbase:namespace table; fold it into hbase:meta | Major | meta |
| [HBASE-21511](https://issues.apache.org/jira/browse/HBASE-21511) | Remove in progress snapshot check in SnapshotFileCache#getUnreferencedFiles | Minor | snapshots |
| [HBASE-21480](https://issues.apache.org/jira/browse/HBASE-21480) | Taking snapshot when RS crashes prevent we bring the regions online | Major | snapshots |
| [HBASE-21485](https://issues.apache.org/jira/browse/HBASE-21485) | Add more debug logs for remote procedure execution | Major | proc-v2 |
| [HBASE-21460](https://issues.apache.org/jira/browse/HBASE-21460) | correct Document Configurable Bucket Sizes in bucketCache | Major | documentation |
| [HBASE-21411](https://issues.apache.org/jira/browse/HBASE-21411) | Need to document the snapshot metric data that is shown in HBase Master Web UI | Major | documentation |
| [HBASE-21328](https://issues.apache.org/jira/browse/HBASE-21328) | add HBASE\_DISABLE\_HADOOP\_CLASSPATH\_LOOKUP switch to hbase-env.sh | Minor | documentation, Operability |
| [HBASE-19682](https://issues.apache.org/jira/browse/HBASE-19682) | Use Collections.emptyList() For Empty List Values | Minor | . |
| [HBASE-21388](https://issues.apache.org/jira/browse/HBASE-21388) | No need to instantiate MemStoreLAB for master which not carry table | Major | . |
| [HBASE-21325](https://issues.apache.org/jira/browse/HBASE-21325) | Force to terminate regionserver when abort hang in somewhere | Major | . |
| [HBASE-21365](https://issues.apache.org/jira/browse/HBASE-21365) | Throw exception when user put data with skip wal to a table which may be replicated | Minor | Client |
| [HBASE-21385](https://issues.apache.org/jira/browse/HBASE-21385) | HTable.delete request use rpc call directly instead of AsyncProcess | Major | . |
| [HBASE-21318](https://issues.apache.org/jira/browse/HBASE-21318) | Make RefreshHFilesClient runnable | Minor | HFile |
| [HBASE-21263](https://issues.apache.org/jira/browse/HBASE-21263) | Mention compression algorithm along with other storefile details | Minor | . |
| [HBASE-21290](https://issues.apache.org/jira/browse/HBASE-21290) | No need to instantiate BlockCache for master which not carry table | Major | . |
| [HBASE-21256](https://issues.apache.org/jira/browse/HBASE-21256) | Improve IntegrationTestBigLinkedList for testing huge data | Major | integration tests |
| [HBASE-21251](https://issues.apache.org/jira/browse/HBASE-21251) | Refactor RegionMover | Major | Operability |
| [HBASE-21303](https://issues.apache.org/jira/browse/HBASE-21303) | [shell] clear\_deadservers with no args fails | Major | . |
| [HBASE-21098](https://issues.apache.org/jira/browse/HBASE-21098) | Improve Snapshot Performance with Temporary Snapshot Directory when rootDir on S3 | Major | . |
| [HBASE-21299](https://issues.apache.org/jira/browse/HBASE-21299) | List counts of actual region states in master UI tables section | Major | UI |
| [HBASE-21289](https://issues.apache.org/jira/browse/HBASE-21289) | Remove the log "'hbase.regionserver.maxlogs' was deprecated." in AbstractFSWAL | Minor | . |
| [HBASE-21185](https://issues.apache.org/jira/browse/HBASE-21185) | WALPrettyPrinter: Additional useful info to be printed by wal printer tool, for debugability purposes | Minor | Operability |
| [HBASE-21103](https://issues.apache.org/jira/browse/HBASE-21103) | nightly test cache of yetus install needs to be more thorough in verification | Major | test |
| [HBASE-21207](https://issues.apache.org/jira/browse/HBASE-21207) | Add client side sorting functionality in master web UI for table and region server details. | Minor | master, monitoring, UI, Usability |
| [HBASE-20857](https://issues.apache.org/jira/browse/HBASE-20857) | JMX - add Balancer status = enabled / disabled | Major | API, master, metrics, REST, tooling, Usability |
| [HBASE-21164](https://issues.apache.org/jira/browse/HBASE-21164) | reportForDuty to spew less log if master is initializing | Minor | regionserver |
| [HBASE-21204](https://issues.apache.org/jira/browse/HBASE-21204) | NPE when scan raw DELETE\_FAMILY\_VERSION and codec is not set | Major | . |
| [HBASE-20307](https://issues.apache.org/jira/browse/HBASE-20307) | LoadTestTool prints too much zookeeper logging | Minor | tooling |
| [HBASE-21155](https://issues.apache.org/jira/browse/HBASE-21155) | Save on a few log strings and some churn in wal splitter by skipping out early if no logs in dir | Trivial | . |
| [HBASE-21129](https://issues.apache.org/jira/browse/HBASE-21129) | Clean up duplicate codes in #equals and #hashCode methods of Filter | Minor | Filters |
| [HBASE-21157](https://issues.apache.org/jira/browse/HBASE-21157) | Split TableInputFormatScan to individual tests | Minor | test |
| [HBASE-21107](https://issues.apache.org/jira/browse/HBASE-21107) | add a metrics for netty direct memory | Minor | IPC/RPC |
| [HBASE-21153](https://issues.apache.org/jira/browse/HBASE-21153) | Shaded client jars should always build in relevant phase to avoid confusion | Major | build |
| [HBASE-18974](https://issues.apache.org/jira/browse/HBASE-18974) | Document "Becoming a Committer" | Major | community, documentation |
| [HBASE-21126](https://issues.apache.org/jira/browse/HBASE-21126) | Add ability for HBase Canary to ignore a configurable number of ZooKeeper down nodes | Minor | canary, Zookeeper |
| [HBASE-20749](https://issues.apache.org/jira/browse/HBASE-20749) | Upgrade our use of checkstyle to 8.6+ | Minor | build, community |
| [HBASE-21071](https://issues.apache.org/jira/browse/HBASE-21071) | HBaseTestingUtility::startMiniCluster() to use builder pattern | Major | test |
| [HBASE-20387](https://issues.apache.org/jira/browse/HBASE-20387) | flaky infrastructure should work for all branches | Critical | test |
| [HBASE-20469](https://issues.apache.org/jira/browse/HBASE-20469) | Directory used for sidelining old recovered edits files should be made configurable | Minor | . |
| [HBASE-20979](https://issues.apache.org/jira/browse/HBASE-20979) | Flaky test reporting should specify what JSON it needs and handle HTTP errors | Minor | test |
| [HBASE-20985](https://issues.apache.org/jira/browse/HBASE-20985) | add two attributes when we do normalization | Major | . |
| [HBASE-20965](https://issues.apache.org/jira/browse/HBASE-20965) | Separate region server report requests to new handlers | Major | Performance |
| [HBASE-20845](https://issues.apache.org/jira/browse/HBASE-20845) | Support set the consistency for Gets and Scans in thrift2 | Major | Thrift |
| [HBASE-20986](https://issues.apache.org/jira/browse/HBASE-20986) | Separate the config of block size when we do log splitting and write Hlog | Major | . |
| [HBASE-20894](https://issues.apache.org/jira/browse/HBASE-20894) | Move BucketCache from java serialization to protobuf | Major | BucketCache |
| [HBASE-19036](https://issues.apache.org/jira/browse/HBASE-19036) | Add action in Chaos Monkey to restart Active Namenode | Minor | . |
| [HBASE-20856](https://issues.apache.org/jira/browse/HBASE-20856) | PITA having to set WAL provider in two places | Minor | Operability, wal |
| [HBASE-20550](https://issues.apache.org/jira/browse/HBASE-20550) | Document about MasterProcWAL | Minor | documentation |
| [HBASE-20935](https://issues.apache.org/jira/browse/HBASE-20935) | HStore.removeCompactedFiles should log in case it is unable to delete a file | Minor | . |
| [HBASE-20977](https://issues.apache.org/jira/browse/HBASE-20977) | Don't use the word "Snapshot" when defining "HBase Snapshots" | Trivial | documentation |
| [HBASE-20873](https://issues.apache.org/jira/browse/HBASE-20873) | Update doc for Endpoint-based Export | Minor | documentation |
| [HBASE-20672](https://issues.apache.org/jira/browse/HBASE-20672) | New metrics ReadRequestRate and WriteRequestRate | Minor | metrics |
| [HBASE-20823](https://issues.apache.org/jira/browse/HBASE-20823) | Wrong param name in javadoc for HRegionServer#buildRegionSpaceUseReportRequest | Trivial | . |
| [HBASE-20617](https://issues.apache.org/jira/browse/HBASE-20617) | Upgrade/remove jetty-jsp | Minor | . |
| [HBASE-20806](https://issues.apache.org/jira/browse/HBASE-20806) | Split style journal for flushes and compactions | Minor | . |
| [HBASE-20396](https://issues.apache.org/jira/browse/HBASE-20396) | Remove redundant MBean from thrift JMX | Major | Thrift |
| [HBASE-20474](https://issues.apache.org/jira/browse/HBASE-20474) | Show non-RPC tasks on master/regionserver Web UI by default | Major | UI |
| [HBASE-20826](https://issues.apache.org/jira/browse/HBASE-20826) | Truncate responseInfo attributes on RpcServer WARN messages | Major | rpc |
| [HBASE-20450](https://issues.apache.org/jira/browse/HBASE-20450) | Provide metrics for number of total active, priority and replication rpc handlers | Major | metrics |
| [HBASE-20357](https://issues.apache.org/jira/browse/HBASE-20357) | AccessControlClient API Enhancement | Major | security |
| [HBASE-20810](https://issues.apache.org/jira/browse/HBASE-20810) | Include the procedure id in the exception message in HBaseAdmin for better debugging | Major | Admin, proc-v2 |
| [HBASE-20040](https://issues.apache.org/jira/browse/HBASE-20040) | Master UI should include "Cluster Key" needed to use the cluster as a replication sink | Minor | Replication, Usability |
| [HBASE-20095](https://issues.apache.org/jira/browse/HBASE-20095) | Redesign single instance pool in CleanerChore | Critical | . |
| [HBASE-20798](https://issues.apache.org/jira/browse/HBASE-20798) | Duplicate thread names of StoreFileOpenerThread and StoreFileCloserThread | Minor | regionserver |
| [HBASE-19164](https://issues.apache.org/jira/browse/HBASE-19164) | Avoid UUID.randomUUID in tests | Major | test |
| [HBASE-20740](https://issues.apache.org/jira/browse/HBASE-20740) | StochasticLoadBalancer should consider CoprocessorService request factor when computing cost | Major | Balancer |
| [HBASE-20532](https://issues.apache.org/jira/browse/HBASE-20532) | Use try-with-resources in BackupSystemTable | Trivial | . |
| [HBASE-20739](https://issues.apache.org/jira/browse/HBASE-20739) | Add priority for SCP | Major | Recovery |
| [HBASE-20737](https://issues.apache.org/jira/browse/HBASE-20737) | put collection into ArrayList instead of addAll function | Trivial | . |
| [HBASE-20733](https://issues.apache.org/jira/browse/HBASE-20733) | QABot should run checkstyle tests if the checkstyle configs change | Minor | build, community |
| [HBASE-20625](https://issues.apache.org/jira/browse/HBASE-20625) | refactor some WALCellCodec related code | Minor | wal |
| [HBASE-19852](https://issues.apache.org/jira/browse/HBASE-19852) | HBase Thrift 1 server SPNEGO Improvements | Major | Thrift |
| [HBASE-20577](https://issues.apache.org/jira/browse/HBASE-20577) | Make Log Level page design consistent with the design of other pages in UI | Major | UI, Usability |
| [HBASE-18948](https://issues.apache.org/jira/browse/HBASE-18948) | HBase tags are server side only. | Major | API, documentation |
| [HBASE-20579](https://issues.apache.org/jira/browse/HBASE-20579) | Improve snapshot manifest copy in ExportSnapshot | Minor | mapreduce |
| [HBASE-20444](https://issues.apache.org/jira/browse/HBASE-20444) | Improve version comparison logic for HBase specific version string and add unit tests | Major | util |
| [HBASE-20594](https://issues.apache.org/jira/browse/HBASE-20594) | provide utility to compare old and new descriptors | Major | . |
| [HBASE-20640](https://issues.apache.org/jira/browse/HBASE-20640) | TestQuotaGlobalsSettingsBypass missing test category and ClassRule | Critical | test |
| [HBASE-20478](https://issues.apache.org/jira/browse/HBASE-20478) | move import checks from hbaseanti to checkstyle | Minor | test |
| [HBASE-20652](https://issues.apache.org/jira/browse/HBASE-20652) | Remove internal uses of some deprecated MasterObserver hooks | Minor | . |
| [HBASE-20548](https://issues.apache.org/jira/browse/HBASE-20548) | Master fails to startup on large clusters, refreshing block distribution | Major | . |
| [HBASE-20207](https://issues.apache.org/jira/browse/HBASE-20207) | Update doc on the steps to revert RegionServer groups feature | Minor | regionserver, rsgroup |
| [HBASE-20488](https://issues.apache.org/jira/browse/HBASE-20488) | PE tool prints full name in help message | Minor | shell |
| [HBASE-20567](https://issues.apache.org/jira/browse/HBASE-20567) | Pass both old and new descriptors to pre/post hooks of modify operations for table and namespace | Major | . |
| [HBASE-20545](https://issues.apache.org/jira/browse/HBASE-20545) | Improve performance of BaseLoadBalancer.retainAssignment | Major | Balancer |
| [HBASE-16191](https://issues.apache.org/jira/browse/HBASE-16191) | Add stop\_regionserver and stop\_master to shell | Major | . |
| [HBASE-20536](https://issues.apache.org/jira/browse/HBASE-20536) | Make TestRegionServerAccounting stable and it should not use absolute number | Minor | . |
| [HBASE-20527](https://issues.apache.org/jira/browse/HBASE-20527) | Remove unused code in MetaTableAccessor | Trivial | . |
| [HBASE-20507](https://issues.apache.org/jira/browse/HBASE-20507) | Do not need to call recoverLease on the broken file when we fail to create a wal writer | Major | wal |
| [HBASE-20484](https://issues.apache.org/jira/browse/HBASE-20484) | Remove the unnecessary autoboxing in FilterListBase | Trivial | . |
| [HBASE-20327](https://issues.apache.org/jira/browse/HBASE-20327) | When qualifier is not specified, append and incr operation do not work (shell) | Minor | shell |
| [HBASE-15317](https://issues.apache.org/jira/browse/HBASE-15317) | document release announcement template | Critical | documentation |
| [HBASE-20499](https://issues.apache.org/jira/browse/HBASE-20499) | Replication/Priority executors can use specific max queue length as default value instead of general maxQueueLength | Minor | . |
| [HBASE-20388](https://issues.apache.org/jira/browse/HBASE-20388) | nightly tests running on a feature branch should only comment on that feature branch's jira | Major | community, test |
| [HBASE-20406](https://issues.apache.org/jira/browse/HBASE-20406) | HBase Thrift HTTP - Shouldn't handle TRACE/OPTIONS methods | Major | security, Thrift |
| [HBASE-20438](https://issues.apache.org/jira/browse/HBASE-20438) | Add an HBase antipattern check for reintroducing commons-logging | Critical | dependencies, test |
| [HBASE-20452](https://issues.apache.org/jira/browse/HBASE-20452) | Master UI: Table merge button should validate required fields before submit | Minor | UI |
| [HBASE-20449](https://issues.apache.org/jira/browse/HBASE-20449) | The minimun number of regions should be configurable in Normalizer | Minor | . |
| [HBASE-20409](https://issues.apache.org/jira/browse/HBASE-20409) | Set hbase.client.meta.operation.timeout in TestClientOperationTimeout | Trivial | test |
| [HBASE-20389](https://issues.apache.org/jira/browse/HBASE-20389) | Move website building flags into a profile | Minor | build, website |
| [HBASE-20379](https://issues.apache.org/jira/browse/HBASE-20379) | shadedjars yetus plugin should add a footer link | Major | test |
| [HBASE-20344](https://issues.apache.org/jira/browse/HBASE-20344) | Fix asciidoc warnings | Minor | documentation |
| [HBASE-15466](https://issues.apache.org/jira/browse/HBASE-15466) | precommit should not run all java goals when given a docs-only patch | Major | build |
| [HBASE-20197](https://issues.apache.org/jira/browse/HBASE-20197) | Review of ByteBufferWriterOutputStream.java | Minor | . |
| [HBASE-16568](https://issues.apache.org/jira/browse/HBASE-16568) | Remove Cygwin-oriented instructions (for installing HBase in Windows OS) from official reference materials | Minor | documentation |
| [HBASE-20047](https://issues.apache.org/jira/browse/HBASE-20047) | AuthenticationTokenIdentifier should provide a toString | Minor | Usability |
| [HBASE-19441](https://issues.apache.org/jira/browse/HBASE-19441) | Implement retry logic around starting exclusive backup operation | Major | backup&restore |
| [HBASE-19024](https://issues.apache.org/jira/browse/HBASE-19024) | Configurable default durability for synchronous WAL | Critical | wal |
| [HBASE-20196](https://issues.apache.org/jira/browse/HBASE-20196) | Maintain all regions with same size in memstore flusher | Major | . |
| [HBASE-19389](https://issues.apache.org/jira/browse/HBASE-19389) | Limit concurrency of put with dense (hundreds) columns to prevent write handler exhausted | Critical | Performance |
| [HBASE-20186](https://issues.apache.org/jira/browse/HBASE-20186) | Improve RSGroupBasedLoadBalancer#balanceCluster() to be more efficient when calculating cluster state for each rsgroup | Minor | rsgroup |
| [HBASE-20181](https://issues.apache.org/jira/browse/HBASE-20181) | Logging and minor logic improvements in BackupLogCleaner | Trivial | . |
| [HBASE-19449](https://issues.apache.org/jira/browse/HBASE-19449) | Minor logging change in HFileArchiver | Trivial | . |
| [HBASE-20133](https://issues.apache.org/jira/browse/HBASE-20133) | Calculate correct assignment and build region movement plans for mis-placed regions in one pass | Minor | rsgroup |
| [HBASE-20120](https://issues.apache.org/jira/browse/HBASE-20120) | Remove some unused classes/ java files from hbase-server | Minor | . |
| [HBASE-18135](https://issues.apache.org/jira/browse/HBASE-18135) | Track file archival for low latency space quota with snapshots | Major | . |
| [HBASE-18133](https://issues.apache.org/jira/browse/HBASE-18133) | Low-latency space quota size reports | Major | . |
| [HBASE-17825](https://issues.apache.org/jira/browse/HBASE-17825) | Backup: further optimizations | Critical | . |
| [HBASE-19614](https://issues.apache.org/jira/browse/HBASE-19614) | Use ArrayDeque as Queue instead of LinkedList in CompoundBloomFilterWriter | Trivial | . |
| [HBASE-19157](https://issues.apache.org/jira/browse/HBASE-19157) | IntegrationTestBackupRestore should warn about missing config | Minor | . |
| [HBASE-19674](https://issues.apache.org/jira/browse/HBASE-19674) | make\_patch.sh version increment fails | Major | . |
| [HBASE-17436](https://issues.apache.org/jira/browse/HBASE-17436) | Add column to master web UI for displaying region states when listing regions of a table | Major | . |
| [HBASE-19478](https://issues.apache.org/jira/browse/HBASE-19478) | Utilize multi-get to speed up WAL file checking in BackupLogCleaner | Major | . |
| [HBASE-19469](https://issues.apache.org/jira/browse/HBASE-19469) | Review Of BackupSystemTable | Trivial | . |
| [HBASE-19159](https://issues.apache.org/jira/browse/HBASE-19159) | Backup should check permission for snapshot copy in advance | Minor | . |
| [HBASE-19174](https://issues.apache.org/jira/browse/HBASE-19174) | Update link to HBase presentations | Trivial | documentation |
| [HBASE-19175](https://issues.apache.org/jira/browse/HBASE-19175) | Add linklint files to gitignore | Trivial | . |
| [HBASE-19183](https://issues.apache.org/jira/browse/HBASE-19183) | Removed redundant groupId from Maven modules | Trivial | . |
| [HBASE-19068](https://issues.apache.org/jira/browse/HBASE-19068) | Change all url of apache.org from HTTP to HTTPS in HBase book | Major | documentation |
| [HBASE-18646](https://issues.apache.org/jira/browse/HBASE-18646) | [Backup] LogRollMasterProcedureManager: make procedure timeout, thread pool size configurable | Major | . |
| [HBASE-18327](https://issues.apache.org/jira/browse/HBASE-18327) | redo test-patch personality 'hadoopcheck' to better account for feature branches | Minor | build, test |
| [HBASE-18176](https://issues.apache.org/jira/browse/HBASE-18176) | add enforcer rule to make sure hbase-spark / scala aren't dependencies of unexpected modules | Major | build, hbase-connectors, spark |
| [HBASE-17549](https://issues.apache.org/jira/browse/HBASE-17549) | HBase-Spark Module : Incorrect log at println and unwanted comment code | Major | hbase-connectors, spark |
| [HBASE-16823](https://issues.apache.org/jira/browse/HBASE-16823) | Add examples in HBase Spark module | Major | hbase-connectors, spark |
| [HBASE-16638](https://issues.apache.org/jira/browse/HBASE-16638) | Reduce the number of Connection's created in classes of hbase-spark module | Critical | hbase-connectors, spark |
| [HBASE-15434](https://issues.apache.org/jira/browse/HBASE-15434) | [findbugs] Exclude scala generated source and protobuf generated code in hbase-spark module | Major | hbase-connectors, spark |
| [HBASE-15282](https://issues.apache.org/jira/browse/HBASE-15282) | Bump hbase-spark to use Spark 1.6.0 | Major | spark |
| [HBASE-14159](https://issues.apache.org/jira/browse/HBASE-14159) | Resolve warning introduced by HBase-Spark module | Minor | build, hbase-connectors, spark |
| [HBASE-14158](https://issues.apache.org/jira/browse/HBASE-14158) | Add documentation for Initial Release for HBase-Spark Module integration | Major | documentation, hbase-connectors, spark |
| [HBASE-14515](https://issues.apache.org/jira/browse/HBASE-14515) | Allow spark module unit tests to be skipped with a profile | Minor | build, hbase-connectors, spark |


### BUG FIXES:

| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22923](https://issues.apache.org/jira/browse/HBASE-22923) | hbase:meta is assigned to localhost when we downgrade the hbase version | Major | . |
| [HBASE-26063](https://issues.apache.org/jira/browse/HBASE-26063) | The current checkcompatibility.py script can not compare master and rel/2.0.0 | Blocker | scripts |
| [HBASE-26030](https://issues.apache.org/jira/browse/HBASE-26030) | hbase-cleanup.sh did not clean the wal dir if hbase.wal.dir configured individually | Major | scripts |
| [HBASE-26061](https://issues.apache.org/jira/browse/HBASE-26061) | [create-release] The indent of checkcompatibility.py is broken after HBASE-25473 | Blocker | scripts |
| [HBASE-26035](https://issues.apache.org/jira/browse/HBASE-26035) | Redundant null check in the compareTo function | Minor | metrics, Performance |
| [HBASE-25902](https://issues.apache.org/jira/browse/HBASE-25902) | Add missing CFs in meta during HBase 1 to 2.3+ Upgrade | Critical | meta, Operability |
| [HBASE-26028](https://issues.apache.org/jira/browse/HBASE-26028) | The view as json page shows exception when using TinyLfuBlockCache | Major | UI |
| [HBASE-26029](https://issues.apache.org/jira/browse/HBASE-26029) | It is not reliable to use nodeDeleted event to track region server's death | Critical | Replication, Zookeeper |
| [HBASE-26039](https://issues.apache.org/jira/browse/HBASE-26039) | TestReplicationKillRS is useless after HBASE-23956 | Major | Replication, test |
| [HBASE-23817](https://issues.apache.org/jira/browse/HBASE-23817) | The message "Please make sure that backup is enabled on the cluster." is shown even when the backup feature is enabled | Minor | . |
| [HBASE-25980](https://issues.apache.org/jira/browse/HBASE-25980) | Master table.jsp pointed at meta throws 500 when no all replicas are online | Major | master, meta replicas, UI |
| [HBASE-26013](https://issues.apache.org/jira/browse/HBASE-26013) | Get operations readRows metrics becomes zero after HBASE-25677 | Minor | metrics |
| [HBASE-25966](https://issues.apache.org/jira/browse/HBASE-25966) | Fix typo in NOTICE.vm | Major | build, community |
| [HBASE-25877](https://issues.apache.org/jira/browse/HBASE-25877) | Add access check for compactionSwitch | Major | security |
| [HBASE-25698](https://issues.apache.org/jira/browse/HBASE-25698) | Persistent IllegalReferenceCountException at scanner open when using TinyLfuBlockCache | Major | BucketCache, HFile, Scanners |
| [HBASE-26001](https://issues.apache.org/jira/browse/HBASE-26001) | When turn on access control, the cell level TTL of Increment and Append operations is invalid. | Minor | Coprocessors |
| [HBASE-25984](https://issues.apache.org/jira/browse/HBASE-25984) | FSHLog WAL lockup with sync future reuse [RS deadlock] | Critical | regionserver, wal |
| [HBASE-25997](https://issues.apache.org/jira/browse/HBASE-25997) | NettyRpcFrameDecoder decode request header wrong when handleTooBigRequest | Major | rpc |
| [HBASE-25994](https://issues.apache.org/jira/browse/HBASE-25994) | Active WAL tailing fails when WAL value compression is enabled | Major | . |
| [HBASE-25924](https://issues.apache.org/jira/browse/HBASE-25924) | Seeing a spike in uncleanlyClosedWALs metric. | Major | Replication, wal |
| [HBASE-25967](https://issues.apache.org/jira/browse/HBASE-25967) | The readRequestsCount does not calculate when the outResults is empty | Major | metrics |
| [HBASE-25981](https://issues.apache.org/jira/browse/HBASE-25981) | JVM crash when displaying regionserver UI | Major | rpc, UI |
| [HBASE-22708](https://issues.apache.org/jira/browse/HBASE-22708) | Remove the deprecated methods in Hbck interface | Major | hbck2 |
| [HBASE-25970](https://issues.apache.org/jira/browse/HBASE-25970) | MOB data loss - incorrect concatenation of MOB\_FILE\_REFS | Critical | mob |
| [HBASE-25930](https://issues.apache.org/jira/browse/HBASE-25930) | Thrift does not support requests in Kerberos environment | Major | Thrift |
| [HBASE-25929](https://issues.apache.org/jira/browse/HBASE-25929) | RegionServer JVM crash when compaction | Critical | Compaction |
| [HBASE-25932](https://issues.apache.org/jira/browse/HBASE-25932) | TestWALEntryStream#testCleanClosedWALs test is failing. | Major | metrics, Replication, wal |
| [HBASE-25903](https://issues.apache.org/jira/browse/HBASE-25903) | ReadOnlyZKClient APIs - CompletableFuture.get() calls can cause threads to hang forver when ZK client create throws Non IOException | Major | . |
| [HBASE-25927](https://issues.apache.org/jira/browse/HBASE-25927) | Fix the log messages by not stringifying the exceptions in log | Minor | logging |
| [HBASE-25938](https://issues.apache.org/jira/browse/HBASE-25938) | The SnapshotOfRegionAssignmentFromMeta.initialize call in FavoredNodeLoadBalancer is just a dummy one | Major | Balancer, FavoredNodes |
| [HBASE-25861](https://issues.apache.org/jira/browse/HBASE-25861) | Correct the usage of Configuration#addDeprecation | Major | . |
| [HBASE-25928](https://issues.apache.org/jira/browse/HBASE-25928) | TestHBaseConfiguration#testDeprecatedConfigurations is broken with Hadoop 3.3 | Major | . |
| [HBASE-25898](https://issues.apache.org/jira/browse/HBASE-25898) | RS getting aborted due to NPE in Replication WALEntryStream | Critical | Replication |
| [HBASE-25875](https://issues.apache.org/jira/browse/HBASE-25875) | RegionServer failed to start due to IllegalThreadStateException in AuthenticationTokenSecretManager.start | Major | . |
| [HBASE-25513](https://issues.apache.org/jira/browse/HBASE-25513) | When the table is turned on normalize, the first region may not be merged even the size is 0 | Major | Normalizer |
| [HBASE-25888](https://issues.apache.org/jira/browse/HBASE-25888) | Backup tests are categorically flakey | Major | backup&restore, test |
| [HBASE-25892](https://issues.apache.org/jira/browse/HBASE-25892) | 'False' should be 'True' in auditlog of listLabels | Major | logging, security |
| [HBASE-25817](https://issues.apache.org/jira/browse/HBASE-25817) | Memory leak from thrift server hashMap | Minor | Thrift |
| [HBASE-25848](https://issues.apache.org/jira/browse/HBASE-25848) | Add flexibility to backup replication in case replication filter throws an exception | Major | . |
| [HBASE-25869](https://issues.apache.org/jira/browse/HBASE-25869) | WAL value compression | Major | Operability, wal |
| [HBASE-25827](https://issues.apache.org/jira/browse/HBASE-25827) | Per Cell TTL tags get duplicated with increments causing tags length overflow | Critical | regionserver |
| [HBASE-25897](https://issues.apache.org/jira/browse/HBASE-25897) | TestRetainAssignmentOnRestart is flaky after HBASE-25032 | Major | Region Assignment |
| [HBASE-25870](https://issues.apache.org/jira/browse/HBASE-25870) | Validate only direct ancestors instead of entire history for a particular backup | Major | backup&restore |
| [HBASE-25867](https://issues.apache.org/jira/browse/HBASE-25867) | Extra doc around ITBLL | Minor | documentation |
| [HBASE-25859](https://issues.apache.org/jira/browse/HBASE-25859) | Reference class incorrectly parses the protobuf magic marker | Minor | regionserver |
| [HBASE-25774](https://issues.apache.org/jira/browse/HBASE-25774) | ServerManager.getOnlineServer may miss some region servers when refreshing state in some procedure implementations | Critical | Replication |
| [HBASE-25837](https://issues.apache.org/jira/browse/HBASE-25837) | TestRollingRestart is flaky | Major | test |
| [HBASE-25833](https://issues.apache.org/jira/browse/HBASE-25833) | HBase Configuration File Descriptions has some description errors or inaccurate | Minor | documentation |
| [HBASE-25825](https://issues.apache.org/jira/browse/HBASE-25825) | RSGroupBasedLoadBalancer.onConfigurationChange should chain the request to internal balancer | Major | Balancer |
| [HBASE-25792](https://issues.apache.org/jira/browse/HBASE-25792) | Filter out o.a.hadoop.thirdparty building shaded jars | Major | shading |
| [HBASE-25811](https://issues.apache.org/jira/browse/HBASE-25811) | The client integration test is failing after HBASE-22120 merged | Major | integration tests |
| [HBASE-25777](https://issues.apache.org/jira/browse/HBASE-25777) | Fix wrong initialization value in StressAssignmentManagerMonkeyFactory | Major | integration tests |
| [HBASE-25735](https://issues.apache.org/jira/browse/HBASE-25735) | Add target Region to connection exceptions | Major | rpc |
| [HBASE-25717](https://issues.apache.org/jira/browse/HBASE-25717) | RegionServer aborted due to ClassCastException | Major | . |
| [HBASE-25743](https://issues.apache.org/jira/browse/HBASE-25743) | Retry REQUESTTIMEOUT KeeperExceptions from ZK | Major | Zookeeper |
| [HBASE-25726](https://issues.apache.org/jira/browse/HBASE-25726) | MoveCostFunction is not included in the list of cost functions for StochasticLoadBalancer | Major | Balancer |
| [HBASE-25692](https://issues.apache.org/jira/browse/HBASE-25692) | Failure to instantiate WALCellCodec leaks socket in replication | Major | Replication |
| [HBASE-25707](https://issues.apache.org/jira/browse/HBASE-25707) | When restoring a table, create a namespace if it does not exist | Minor | backup&restore |
| [HBASE-25710](https://issues.apache.org/jira/browse/HBASE-25710) | During the recovery process, an error is thrown if there is an incremental backup of data that has not been updated | Minor | backup&restore |
| [HBASE-25568](https://issues.apache.org/jira/browse/HBASE-25568) | Upgrade Thrift jar to fix CVE-2020-13949 | Critical | Thrift |
| [HBASE-25590](https://issues.apache.org/jira/browse/HBASE-25590) | Bulkload replication HFileRefs cannot be cleared in some cases where set exclude-namespace/exclude-table-cfs | Major | Replication |
| [HBASE-25562](https://issues.apache.org/jira/browse/HBASE-25562) | ReplicationSourceWALReader log and handle exception immediately without retrying | Major | Replication |
| [HBASE-25693](https://issues.apache.org/jira/browse/HBASE-25693) | NPE getting metrics from standby masters (MetricsMasterWrapperImpl.getMergePlanCount) | Major | master |
| [HBASE-25689](https://issues.apache.org/jira/browse/HBASE-25689) | Nightly client integration test is failing after upgrading to log4j2 | Critical | integration tests, logging |
| [HBASE-25685](https://issues.apache.org/jira/browse/HBASE-25685) | asyncprofiler2.0 no longer supports svg; wants html | Major | . |
| [HBASE-25594](https://issues.apache.org/jira/browse/HBASE-25594) | graceful\_stop.sh fails to unload regions when ran at localhost | Minor | . |
| [HBASE-25674](https://issues.apache.org/jira/browse/HBASE-25674) | RegionInfo.parseFrom(DataInputStream) sometimes fails to read the protobuf magic marker | Minor | Client |
| [HBASE-25673](https://issues.apache.org/jira/browse/HBASE-25673) | Wrong log regarding current active master at ZKLeaderManager#waitToBecomeLeader | Minor | . |
| [HBASE-25669](https://issues.apache.org/jira/browse/HBASE-25669) | Typo in docs vs code: hbase.mob.[file.]compaction.chore.period | Major | . |
| [HBASE-25595](https://issues.apache.org/jira/browse/HBASE-25595) | TestLruBlockCache.testBackgroundEvictionThread is flaky | Major | . |
| [HBASE-25662](https://issues.apache.org/jira/browse/HBASE-25662) | Fix spotbugs warning in RoundRobinTableInputFormat | Major | findbugs |
| [HBASE-25657](https://issues.apache.org/jira/browse/HBASE-25657) | Fix spotbugs warnings after upgrading spotbugs to 4.x | Major | findbugs |
| [HBASE-25646](https://issues.apache.org/jira/browse/HBASE-25646) | Possible Resource Leak in CatalogJanitor | Major | master |
| [HBASE-25654](https://issues.apache.org/jira/browse/HBASE-25654) | [Documentation] Fix format error in security.adoc | Trivial | documentation |
| [HBASE-25626](https://issues.apache.org/jira/browse/HBASE-25626) | Possible Resource Leak in HeterogeneousRegionCountCostFunction | Major | . |
| [HBASE-25644](https://issues.apache.org/jira/browse/HBASE-25644) | Scan#setSmall blindly sets ReadType as PREAD | Critical | . |
| [HBASE-25609](https://issues.apache.org/jira/browse/HBASE-25609) | There is a problem with the SPLITS\_FILE in the HBase shell statement | Minor | shell |
| [HBASE-25385](https://issues.apache.org/jira/browse/HBASE-25385) | TestCurrentHourProvider fails if the latest timezone changes are not present | Blocker | . |
| [HBASE-25596](https://issues.apache.org/jira/browse/HBASE-25596) | Fix NPE in ReplicationSourceManager as well as avoid permanently unreplicated data due to EOFException from WAL | Critical | Replication |
| [HBASE-25367](https://issues.apache.org/jira/browse/HBASE-25367) | Sort broken after Change 'State time' in UI | Major | UI |
| [HBASE-25421](https://issues.apache.org/jira/browse/HBASE-25421) | There is no limit on the column family length when creating a table | Major | Client |
| [HBASE-25371](https://issues.apache.org/jira/browse/HBASE-25371) | When openRegion fails during initial verification(before initializing and setting seq num), exception is observed during region close. | Major | Region Assignment |
| [HBASE-25611](https://issues.apache.org/jira/browse/HBASE-25611) | ExportSnapshot chmod flag uses value as decimal | Major | . |
| [HBASE-25586](https://issues.apache.org/jira/browse/HBASE-25586) | Fix HBASE-22492 on branch-2 (SASL GapToken) | Major | rpc |
| [HBASE-25602](https://issues.apache.org/jira/browse/HBASE-25602) | Fix broken TestReplicationShell on master | Major | shell |
| [HBASE-25598](https://issues.apache.org/jira/browse/HBASE-25598) | TestFromClientSide5.testScanMetrics is flaky | Major | . |
| [HBASE-25556](https://issues.apache.org/jira/browse/HBASE-25556) | Frequent replication "Encountered a malformed edit" warnings | Minor | Operability, Replication |
| [HBASE-25575](https://issues.apache.org/jira/browse/HBASE-25575) | Should validate Puts in RowMutations | Minor | Client |
| [HBASE-25559](https://issues.apache.org/jira/browse/HBASE-25559) | Terminate threads of oldsources while RS is closing | Major | . |
| [HBASE-25512](https://issues.apache.org/jira/browse/HBASE-25512) | May throw StringIndexOutOfBoundsException when construct illegal tablename error | Trivial | . |
| [HBASE-25560](https://issues.apache.org/jira/browse/HBASE-25560) | Remove unused parameter named peerId in the constructor method of CatalogReplicationSourcePeer | Major | . |
| [HBASE-25543](https://issues.apache.org/jira/browse/HBASE-25543) | When configuration "hadoop.security.authorization" is set to false, the system will still try to authorize an RPC and raise AccessDeniedException | Minor | IPC/RPC |
| [HBASE-25554](https://issues.apache.org/jira/browse/HBASE-25554) | NPE when init RegionMover | Major | . |
| [HBASE-25546](https://issues.apache.org/jira/browse/HBASE-25546) | PerfTestCompactionPolicies is failing because of NPE | Minor | test |
| [HBASE-25498](https://issues.apache.org/jira/browse/HBASE-25498) | [Documentation] Add a comment when using Secure HTTP (HTTPS) for the Web UI | Trivial | documentation |
| [HBASE-25523](https://issues.apache.org/jira/browse/HBASE-25523) | Region normalizer chore thread is getting killed | Major | Normalizer |
| [HBASE-25533](https://issues.apache.org/jira/browse/HBASE-25533) | The metadata of the table and family should not be an empty string | Major | . |
| [HBASE-25501](https://issues.apache.org/jira/browse/HBASE-25501) | Backup not using parameters such as bandwidth, workers, etc while exporting snapshot | Major | backup&restore |
| [HBASE-25478](https://issues.apache.org/jira/browse/HBASE-25478) | Implement retries when enabling tables in TestRegionReplicaReplicationEndpoint | Minor | . |
| [HBASE-25497](https://issues.apache.org/jira/browse/HBASE-25497) | move\_namespaces\_rsgroup should change hbase.rsgroup.name config in NamespaceDescriptor | Major | . |
| [HBASE-25279](https://issues.apache.org/jira/browse/HBASE-25279) | Non-daemon thread in ZKWatcher | Critical | Zookeeper |
| [HBASE-25495](https://issues.apache.org/jira/browse/HBASE-25495) | fix comment error of admin.rb | Minor | . |
| [HBASE-25503](https://issues.apache.org/jira/browse/HBASE-25503) | HBase code download is failing on windows with invalid path error | Major | . |
| [HBASE-24813](https://issues.apache.org/jira/browse/HBASE-24813) | ReplicationSource should clear buffer usage on ReplicationSourceManager upon termination | Major | Replication |
| [HBASE-25459](https://issues.apache.org/jira/browse/HBASE-25459) | WAL can't be cleaned in some scenes | Major | . |
| [HBASE-25473](https://issues.apache.org/jira/browse/HBASE-25473) | [create-release] checkcompatibility.py failing with "KeyError: 'binary'" | Major | scripts |
| [HBASE-25487](https://issues.apache.org/jira/browse/HBASE-25487) | [create-release] changes.md update broken | Major | create-release |
| [HBASE-25434](https://issues.apache.org/jira/browse/HBASE-25434) | SlowDelete & SlowPut metric value should use updateDelete & updatePut | Major | regionserver |
| [HBASE-25441](https://issues.apache.org/jira/browse/HBASE-25441) | add security check for some APIs in RSRpcServices | Critical | . |
| [HBASE-25432](https://issues.apache.org/jira/browse/HBASE-25432) | we should add security checks for setTableStateInMeta and fixMeta | Blocker | . |
| [HBASE-25445](https://issues.apache.org/jira/browse/HBASE-25445) | Old WALs archive fails in procedure based WAL split | Critical | wal |
| [HBASE-25287](https://issues.apache.org/jira/browse/HBASE-25287) | Forgetting to unbuffer streams results in many CLOSE\_WAIT sockets when loading files | Major | . |
| [HBASE-25447](https://issues.apache.org/jira/browse/HBASE-25447) | remoteProc is suspended due to OOM ERROR | Major | proc-v2 |
| [HBASE-24755](https://issues.apache.org/jira/browse/HBASE-24755) | [LOG][RSGroup]Error message is confusing while adding a offline RS to rsgroup | Major | rsgroup |
| [HBASE-25463](https://issues.apache.org/jira/browse/HBASE-25463) | Fix comment error | Minor | shell |
| [HBASE-25457](https://issues.apache.org/jira/browse/HBASE-25457) | Possible race in AsyncConnectionImpl between getChoreService and close | Major | Client |
| [HBASE-25456](https://issues.apache.org/jira/browse/HBASE-25456) | setRegionStateInMeta need security check | Critical | . |
| [HBASE-25383](https://issues.apache.org/jira/browse/HBASE-25383) | HBase doesn't update and remove the peer config from hbase.replication.source.custom.walentryfilters if the config is already set on the peer. | Major | . |
| [HBASE-25404](https://issues.apache.org/jira/browse/HBASE-25404) | Procedures table Id under master web UI gets word break to single character | Minor | UI |
| [HBASE-25277](https://issues.apache.org/jira/browse/HBASE-25277) | postScannerFilterRow impacts Scan performance a lot in HBase 2.x | Critical | Coprocessors, scan |
| [HBASE-25365](https://issues.apache.org/jira/browse/HBASE-25365) | The log in move\_servers\_rsgroup is incorrect | Minor | . |
| [HBASE-25378](https://issues.apache.org/jira/browse/HBASE-25378) | Legacy comparator in Hfile trailer will fail to load | Critical | . |
| [HBASE-25332](https://issues.apache.org/jira/browse/HBASE-25332) | one NPE | Major | Zookeeper |
| [HBASE-25376](https://issues.apache.org/jira/browse/HBASE-25376) | [create-release] Fix double .asc | Major | create-release |
| [HBASE-25362](https://issues.apache.org/jira/browse/HBASE-25362) | Quoting in hbase-vote script fails build with empty "" | Minor | . |
| [HBASE-25372](https://issues.apache.org/jira/browse/HBASE-25372) | Fix typo in ban-jersey section of the enforcer plugin in pom.xml | Major | build |
| [HBASE-25366](https://issues.apache.org/jira/browse/HBASE-25366) | [Documentation] Fix spelling error in sync\_replication.adoc | Trivial | documentation |
| [HBASE-25361](https://issues.apache.org/jira/browse/HBASE-25361) | [Flakey Tests] branch-2 TestMetaRegionLocationCache.testStandByMetaLocations | Major | flakies |
| [HBASE-25292](https://issues.apache.org/jira/browse/HBASE-25292) | Improve InetSocketAddress usage discipline | Major | Client, HFile |
| [HBASE-25354](https://issues.apache.org/jira/browse/HBASE-25354) | Update create-release scripts; rotted | Major | . |
| [HBASE-24966](https://issues.apache.org/jira/browse/HBASE-24966) | The methods in AsyncTableRegionLocator should not throw IOException directly | Major | API, Client |
| [HBASE-25355](https://issues.apache.org/jira/browse/HBASE-25355) | [Documentation] Fix spelling error | Trivial | documentation |
| [HBASE-25230](https://issues.apache.org/jira/browse/HBASE-25230) | Embedded zookeeper server not clean up the old data | Minor | Zookeeper |
| [HBASE-25349](https://issues.apache.org/jira/browse/HBASE-25349) | [Flakey Tests] branch-2 TestRefreshRecoveredReplication.testReplicationRefreshSource:141 Waiting timed out after [60,000] msec | Major | flakies |
| [HBASE-25345](https://issues.apache.org/jira/browse/HBASE-25345) | [Flakey Tests] branch-2 TestReadReplicas#testVerifySecondaryAbilityToReadWithOnFiles | Major | test |
| [HBASE-25307](https://issues.apache.org/jira/browse/HBASE-25307) | ThreadLocal pooling leads to NullPointerException | Major | Client |
| [HBASE-25341](https://issues.apache.org/jira/browse/HBASE-25341) | Fix ErrorProne error which causes nightly to fail | Major | test |
| [HBASE-25330](https://issues.apache.org/jira/browse/HBASE-25330) | RSGroupInfoManagerImpl#moveServers return is not set of servers moved | Major | rsgroup |
| [HBASE-25321](https://issues.apache.org/jira/browse/HBASE-25321) | The sort icons not shown after Upgrade JQuery to 3.5.1 | Major | UI |
| [HBASE-24268](https://issues.apache.org/jira/browse/HBASE-24268) | REST and Thrift server do not handle the "doAs" parameter case insensitively | Minor | REST, Thrift |
| [HBASE-25050](https://issues.apache.org/jira/browse/HBASE-25050) | We initialize Filesystems more than once. | Minor | . |
| [HBASE-25299](https://issues.apache.org/jira/browse/HBASE-25299) | Scan#setRowPrefixFilter Unexpected behavior | Major | Client, scan |
| [HBASE-25311](https://issues.apache.org/jira/browse/HBASE-25311) | ui throws NPE | Major | . |
| [HBASE-25306](https://issues.apache.org/jira/browse/HBASE-25306) | The log in SimpleLoadBalancer#onConfigurationChange is wrong | Major | . |
| [HBASE-25300](https://issues.apache.org/jira/browse/HBASE-25300) | 'Unknown table hbase:quota' happens when desc table in shell if quota disabled | Major | shell |
| [HBASE-22476](https://issues.apache.org/jira/browse/HBASE-22476) | HBase-backup module's class "org.apache.hadoop.hbase.backup.impl.BackupManifest" FSDataInputStream is not close. | Major | backup&restore |
| [HBASE-25255](https://issues.apache.org/jira/browse/HBASE-25255) | Master fails to initialize when creating rs group table | Critical | master, rsgroup |
| [HBASE-25275](https://issues.apache.org/jira/browse/HBASE-25275) | Upgrade asciidoctor | Blocker | website |
| [HBASE-25276](https://issues.apache.org/jira/browse/HBASE-25276) | Need to throw the original exception in HRegion#openHRegion | Major | . |
| [HBASE-20598](https://issues.apache.org/jira/browse/HBASE-20598) | Upgrade to JRuby 9.2 | Major | dependencies, shell |
| [HBASE-25216](https://issues.apache.org/jira/browse/HBASE-25216) | The client zk syncer should deal with meta replica count change | Major | master, Zookeeper |
| [HBASE-25238](https://issues.apache.org/jira/browse/HBASE-25238) | Upgrading HBase from 2.2.0 to 2.3.x fails because of “Message missing required fields: state” | Critical | . |
| [HBASE-25053](https://issues.apache.org/jira/browse/HBASE-25053) | WAL replay should ignore 0-length files | Major | master, regionserver |
| [HBASE-25090](https://issues.apache.org/jira/browse/HBASE-25090) | CompactionConfiguration logs unrealistic store file sizes | Minor | Compaction |
| [HBASE-24977](https://issues.apache.org/jira/browse/HBASE-24977) | Meta table shouldn't be modified as read only | Major | meta |
| [HBASE-25176](https://issues.apache.org/jira/browse/HBASE-25176) | MasterStoppedException should be moved to hbase-client module | Major | Client |
| [HBASE-25206](https://issues.apache.org/jira/browse/HBASE-25206) | Data loss can happen if a cloned table loses original split region(delete table) | Major | proc-v2, Region Assignment, snapshots |
| [HBASE-25207](https://issues.apache.org/jira/browse/HBASE-25207) | Revisit the implementation and usage of RegionStates.include | Major | Region Assignment |
| [HBASE-25186](https://issues.apache.org/jira/browse/HBASE-25186) | TestMasterRegionOnTwoFileSystems is failing after HBASE-25065 | Blocker | master |
| [HBASE-25204](https://issues.apache.org/jira/browse/HBASE-25204) | Nightly job failed as the name of jdk and maven changed | Major | . |
| [HBASE-25166](https://issues.apache.org/jira/browse/HBASE-25166) | MobFileCompactionChore is closing the master's shared cluster connection | Major | master |
| [HBASE-25093](https://issues.apache.org/jira/browse/HBASE-25093) | the RSGroupBasedLoadBalancer#retainAssignment throws NPE | Major | rsgroup |
| [HBASE-25117](https://issues.apache.org/jira/browse/HBASE-25117) | ReplicationSourceShipper thread can not be finished | Major | . |
| [HBASE-25168](https://issues.apache.org/jira/browse/HBASE-25168) | Unify WAL name timestamp parsers | Major | . |
| [HBASE-23834](https://issues.apache.org/jira/browse/HBASE-23834) | HBase fails to run on Hadoop 3.3.0/3.2.2/3.1.4 due to jetty version mismatch | Major | dependencies |
| [HBASE-25165](https://issues.apache.org/jira/browse/HBASE-25165) | Change 'State time' in UI so sorts | Minor | UI |
| [HBASE-25048](https://issues.apache.org/jira/browse/HBASE-25048) | [HBCK2] Bypassed parent procedures are not updated in store | Major | hbck2, proc-v2 |
| [HBASE-25147](https://issues.apache.org/jira/browse/HBASE-25147) | Should store the regionNames field in state data for ReopenTableRegionsProcedure | Major | proc-v2 |
| [HBASE-25115](https://issues.apache.org/jira/browse/HBASE-25115) | HFilePrettyPrinter can't seek to the row which is the first row of a hfile | Major | HFile, tooling |
| [HBASE-25135](https://issues.apache.org/jira/browse/HBASE-25135) | Convert the internal seperator while emitting the memstore read metrics to # | Minor | . |
| [HBASE-24665](https://issues.apache.org/jira/browse/HBASE-24665) | MultiWAL : Avoid rolling of ALL WALs when one of the WAL needs a roll | Major | wal |
| [HBASE-25100](https://issues.apache.org/jira/browse/HBASE-25100) | conf and conn are assigned twice in HBaseReplicationEndpoint and HBaseInterClusterReplicationEndpoint | Major | Replication |
| [HBASE-25096](https://issues.apache.org/jira/browse/HBASE-25096) | WAL size in RegionServer UI is wrong | Major | . |
| [HBASE-25077](https://issues.apache.org/jira/browse/HBASE-25077) | hbck.jsp page loading fails, logs NPE in master log. | Major | hbck |
| [HBASE-25088](https://issues.apache.org/jira/browse/HBASE-25088) | CatalogFamilyFormat/MetaTableAccessor.parseRegionInfoFromRegionName incorrectly setEndKey to regionId | Critical | meta |
| [HBASE-25098](https://issues.apache.org/jira/browse/HBASE-25098) | ReplicationStatisticsChore runs in wrong time unit | Major | Replication |
| [HBASE-25097](https://issues.apache.org/jira/browse/HBASE-25097) | Wrong RIT page number in Master UI | Minor | UI |
| [HBASE-25081](https://issues.apache.org/jira/browse/HBASE-25081) | Up the container nproc uplimit to 30000 | Major | test |
| [HBASE-24896](https://issues.apache.org/jira/browse/HBASE-24896) | 'Stuck' in static initialization creating RegionInfo instance | Major | . |
| [HBASE-24481](https://issues.apache.org/jira/browse/HBASE-24481) | HBase Rest: Request for region detail of a table which doesn't exits is success(200 success code) instead of 404 | Minor | . |
| [HBASE-25054](https://issues.apache.org/jira/browse/HBASE-25054) | Do not add non shaded protobuf as dependency in TableMapReduceUtil for master | Major | mapreduce |
| [HBASE-25047](https://issues.apache.org/jira/browse/HBASE-25047) | WAL split edits number is negative in RegionServerUI | Minor | UI, wal |
| [HBASE-25021](https://issues.apache.org/jira/browse/HBASE-25021) | Nightly job should skip hadoop-2 integration test for master | Major | build, scripts |
| [HBASE-25012](https://issues.apache.org/jira/browse/HBASE-25012) | HBASE-24359 causes replication missed log of some RemoteException | Major | Replication |
| [HBASE-25009](https://issues.apache.org/jira/browse/HBASE-25009) | Hbck chore logs wrong message when loading regions from RS report | Minor | . |
| [HBASE-25014](https://issues.apache.org/jira/browse/HBASE-25014) | ScheduledChore is never triggered when initalDelay \> 1.5\*period | Major | . |
| [HBASE-25016](https://issues.apache.org/jira/browse/HBASE-25016) | Should close ResultScanner in MetaTableAccessor.scanByRegionEncodedName | Critical | master, meta |
| [HBASE-24958](https://issues.apache.org/jira/browse/HBASE-24958) | CompactingMemStore.timeOfOldestEdit error update | Critical | regionserver |
| [HBASE-24990](https://issues.apache.org/jira/browse/HBASE-24990) | Fix empty value of properties 'hbase.replication.source.maxthreads' in hbase-thrift module | Trivial | . |
| [HBASE-24995](https://issues.apache.org/jira/browse/HBASE-24995) | MetaFixer fails to fix overlaps when multiple tables have overlaps | Major | hbck2 |
| [HBASE-24980](https://issues.apache.org/jira/browse/HBASE-24980) | Fix dead links in HBase book | Major | documentation |
| [HBASE-19352](https://issues.apache.org/jira/browse/HBASE-19352) | Port HADOOP-10379: Protect authentication cookies with the HttpOnly and Secure flags | Major | . |
| [HBASE-24971](https://issues.apache.org/jira/browse/HBASE-24971) | Upgrade JQuery to 3.5.1 | Major | security, UI |
| [HBASE-24968](https://issues.apache.org/jira/browse/HBASE-24968) | One of static initializers of CellComparatorImpl referring to subclass MetaCellComparator | Major | . |
| [HBASE-24916](https://issues.apache.org/jira/browse/HBASE-24916) | Region hole contains wrong regions pair when hole is created by first region deletion | Major | hbck2 |
| [HBASE-24892](https://issues.apache.org/jira/browse/HBASE-24892) | config 'hbase.hregion.memstore.mslab.indexchunksize' not be used | Major | . |
| [HBASE-23987](https://issues.apache.org/jira/browse/HBASE-23987) | NettyRpcClientConfigHelper will not share event loop by default which is incorrect | Major | Client, rpc |
| [HBASE-24871](https://issues.apache.org/jira/browse/HBASE-24871) | Replication may loss data when refresh recovered replication sources | Major | Replication |
| [HBASE-24885](https://issues.apache.org/jira/browse/HBASE-24885) | STUCK RIT by hbck2 assigns | Major | hbck2, Region Assignment |
| [HBASE-24890](https://issues.apache.org/jira/browse/HBASE-24890) | The command regioninfo is not available | Major | shell |
| [HBASE-24926](https://issues.apache.org/jira/browse/HBASE-24926) | Should call setFailure in MergeTableRegionsProcedure when isMergeable returns false | Major | master, proc-v2 |
| [HBASE-24884](https://issues.apache.org/jira/browse/HBASE-24884) | BulkLoadHFilesTool/LoadIncrementalHFiles should accept -D options from command line parameters | Minor | . |
| [HBASE-24799](https://issues.apache.org/jira/browse/HBASE-24799) | Do not call make\_binary\_release for hbase-thirdparty in release scripts | Major | scripts |
| [HBASE-24874](https://issues.apache.org/jira/browse/HBASE-24874) | Fix hbase-shell access to ModifiableTableDescriptor methods | Major | shell |
| [HBASE-24568](https://issues.apache.org/jira/browse/HBASE-24568) | do-release need not wait for tag | Major | build, community |
| [HBASE-24583](https://issues.apache.org/jira/browse/HBASE-24583) | Normalizer can't actually merge empty regions when neighbor is larger than average size | Major | master, Normalizer |
| [HBASE-24844](https://issues.apache.org/jira/browse/HBASE-24844) | Exception on standalone (master) shutdown | Minor | Zookeeper |
| [HBASE-24856](https://issues.apache.org/jira/browse/HBASE-24856) | Fix error prone error in FlushTableSubprocedure | Major | . |
| [HBASE-22740](https://issues.apache.org/jira/browse/HBASE-22740) | [RSGroup] Forward-port HBASE-22658 to master branch | Major | rsgroup |
| [HBASE-24838](https://issues.apache.org/jira/browse/HBASE-24838) | The pre commit job fails to archive surefire reports | Critical | build, scripts |
| [HBASE-23157](https://issues.apache.org/jira/browse/HBASE-23157) | WAL unflushed seqId tracking may wrong when Durability.ASYNC\_WAL is used | Major | regionserver, wal |
| [HBASE-24625](https://issues.apache.org/jira/browse/HBASE-24625) | AsyncFSWAL.getLogFileSizeIfBeingWritten does not return the expected synced file length. | Critical | Replication, wal |
| [HBASE-24830](https://issues.apache.org/jira/browse/HBASE-24830) | Some tests involving RS crash fail with NullPointerException after HBASE-24632 in branch-2 | Major | . |
| [HBASE-24788](https://issues.apache.org/jira/browse/HBASE-24788) | Fix the connection leaks on getting hbase admin from unclosed connection | Major | mapreduce |
| [HBASE-24805](https://issues.apache.org/jira/browse/HBASE-24805) | HBaseTestingUtility.getConnection should be threadsafe | Major | test |
| [HBASE-24808](https://issues.apache.org/jira/browse/HBASE-24808) | skip empty log cleaner delegate class names (WAS =\> cleaner.CleanerChore: Can NOT create CleanerDelegate= ClassNotFoundException) | Trivial | . |
| [HBASE-24767](https://issues.apache.org/jira/browse/HBASE-24767) | Change default to false for HBASE-15519 per-user metrics | Major | metrics |
| [HBASE-24713](https://issues.apache.org/jira/browse/HBASE-24713) | RS startup with FSHLog throws NPE after HBASE-21751 | Minor | wal |
| [HBASE-24794](https://issues.apache.org/jira/browse/HBASE-24794) | hbase.rowlock.wait.duration should not be \

HBase是一个分布式、版本化、构建在Apache Hadoop和Apache ZooKeeper上的列数据库

CVE-2019-14540

CVE-2022-40149

CVE-2019-16335

CVE-2022-42003

CVE-2020-13949

暂无

暂无