hbase/CHANGES.md

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# HBASE Changelog
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## Release 2.4.0 - Unreleased (as of 2020-12-02)
### NEW FEATURES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [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 |
### IMPROVEMENTS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-25246](https://issues.apache.org/jira/browse/HBASE-25246) | Backup/Restore hbase cell tags. | Major | backup&restore |
| [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-25213](https://issues.apache.org/jira/browse/HBASE-25213) | Should request Compaction when bulkLoadHFiles is done | 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-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-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-25272](https://issues.apache.org/jira/browse/HBASE-25272) | Support scan on a specific replica | Critical | Client, scan |
| [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-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-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-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-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-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-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-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-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-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-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-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-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-24704](https://issues.apache.org/jira/browse/HBASE-24704) | Make the Table Schema easier to view even there are multiple families | Major | UI |
| [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-24669](https://issues.apache.org/jira/browse/HBASE-24669) | Logging of ppid should be consistent across all occurrences | Minor | Operability, proc-v2 |
| [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-24747](https://issues.apache.org/jira/browse/HBASE-24747) | Log an ERROR if HBaseSaslRpcServer initialisation fails with an uncaught exception | Major | . |
| [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-24560](https://issues.apache.org/jira/browse/HBASE-24560) | Add a new option of designatedfile in RegionMover | Major | . |
| [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-24208](https://issues.apache.org/jira/browse/HBASE-24208) | Remove RS entry from zk draining servers node after RS been stopped | Major | . |
| [HBASE-24456](https://issues.apache.org/jira/browse/HBASE-24456) | Immutable Scan as unmodifiable subclass or wrapper of Scan | Major | . |
| [HBASE-24471](https://issues.apache.org/jira/browse/HBASE-24471) | The way we bootstrap meta table is confusing | Major | master, meta, proc-v2 |
| [HBASE-24350](https://issues.apache.org/jira/browse/HBASE-24350) | HBase table level replication metrics for shippedBytes are always 0 | Major | Replication |
| [HBASE-24311](https://issues.apache.org/jira/browse/HBASE-24311) | Add more details in MultiVersionConcurrencyControl STUCK log message | Major | . |
### BUG FIXES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [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-25332](https://issues.apache.org/jira/browse/HBASE-25332) | one NPE | Major | Zookeeper |
| [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-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-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-25234](https://issues.apache.org/jira/browse/HBASE-25234) | [Upgrade]Incompatibility in reading RS report from 2.1 RS when Master is upgraded to a version containing HBASE-21406 | Major | . |
| [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-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-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-25097](https://issues.apache.org/jira/browse/HBASE-25097) | Wrong RIT page number in Master UI | Minor | UI |
| [HBASE-24896](https://issues.apache.org/jira/browse/HBASE-24896) | 'Stuck' in static initialization creating RegionInfo instance | Major | . |
| [HBASE-24956](https://issues.apache.org/jira/browse/HBASE-24956) | ConnectionManager#locateRegionInMeta waits for user region lock indefinitely. | Major | Client |
| [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-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-24995](https://issues.apache.org/jira/browse/HBASE-24995) | MetaFixer fails to fix overlaps when multiple tables have overlaps | Major | hbck2 |
| [HBASE-24719](https://issues.apache.org/jira/browse/HBASE-24719) | Renaming invalid rsgroup throws NPE instead of proper error message | Major | . |
| [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-24885](https://issues.apache.org/jira/browse/HBASE-24885) | STUCK RIT by hbck2 assigns | Major | hbck2, Region Assignment |
| [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-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-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 \<= 0 | Minor | regionserver |
| [HBASE-24797](https://issues.apache.org/jira/browse/HBASE-24797) | Move log code out of loop | Minor | Normalizer |
| [HBASE-24752](https://issues.apache.org/jira/browse/HBASE-24752) | NPE/500 accessing webui on master startup | Minor | master |
| [HBASE-24766](https://issues.apache.org/jira/browse/HBASE-24766) | Document Remote Procedure Execution | Major | documentation |
| [HBASE-11676](https://issues.apache.org/jira/browse/HBASE-11676) | Scan FORMATTER is not applied for columns using non-printable name in shell | Minor | shell |
| [HBASE-24738](https://issues.apache.org/jira/browse/HBASE-24738) | [Shell] processlist command fails with ERROR: Unexpected end of file from server when SSL enabled | Major | shell |
| [HBASE-24675](https://issues.apache.org/jira/browse/HBASE-24675) | On Master restart all servers are assigned to default rsgroup. | Major | rsgroup |
| [HBASE-22146](https://issues.apache.org/jira/browse/HBASE-22146) | SpaceQuotaViolationPolicy Disable is not working in Namespace level | Major | . |
| [HBASE-24742](https://issues.apache.org/jira/browse/HBASE-24742) | Improve performance of SKIP vs SEEK logic | Major | Performance, regionserver |
| [HBASE-24710](https://issues.apache.org/jira/browse/HBASE-24710) | Incorrect checksum calculation in saveVersion.sh | Major | scripts |
| [HBASE-24714](https://issues.apache.org/jira/browse/HBASE-24714) | Error message is displayed in the UI of table's compaction state if any region of that table is not open. | Major | Compaction, UI |
| [HBASE-24748](https://issues.apache.org/jira/browse/HBASE-24748) | Add hbase.master.balancer.stochastic.moveCost.offpeak to doc as support dynamically change | Minor | documentation |
| [HBASE-24746](https://issues.apache.org/jira/browse/HBASE-24746) | The sort icons overlap the col name in master UI | Major | UI |
| [HBASE-24721](https://issues.apache.org/jira/browse/HBASE-24721) | rename\_rsgroup overwriting the existing rsgroup. | Major | . |
| [HBASE-24615](https://issues.apache.org/jira/browse/HBASE-24615) | MutableRangeHistogram#updateSnapshotRangeMetrics doesn't calculate the distribution for last bucket. | Major | metrics |
| [HBASE-24705](https://issues.apache.org/jira/browse/HBASE-24705) | MetaFixer#fixHoles() does not include the case for read replicas (i.e, replica regions are not created) | Major | read replicas |
| [HBASE-24720](https://issues.apache.org/jira/browse/HBASE-24720) | Meta replicas not cleaned when disabled | Minor | read replicas |
| [HBASE-24693](https://issues.apache.org/jira/browse/HBASE-24693) | regioninfo#isLast() has a logic error | Minor | . |
| [HBASE-23744](https://issues.apache.org/jira/browse/HBASE-23744) | FastPathBalancedQueueRpcExecutor should enforce queue length of 0 | Minor | . |
| [HBASE-22738](https://issues.apache.org/jira/browse/HBASE-22738) | Fallback to default group to choose RS when there are no RS in current group | Major | rsgroup |
| [HBASE-23126](https://issues.apache.org/jira/browse/HBASE-23126) | IntegrationTestRSGroup is useless now | Major | rsgroup |
| [HBASE-24518](https://issues.apache.org/jira/browse/HBASE-24518) | waitForNamespaceOnline() should return false if any region is offline | Major | . |
| [HBASE-24564](https://issues.apache.org/jira/browse/HBASE-24564) | Make RS abort call idempotent | Major | regionserver |
| [HBASE-24340](https://issues.apache.org/jira/browse/HBASE-24340) | PerformanceEvaluation options should not mandate any specific order | Minor | . |
| [HBASE-24130](https://issues.apache.org/jira/browse/HBASE-24130) | rat plugin complains about having an unlicensed file. | Minor | . |
| [HBASE-24017](https://issues.apache.org/jira/browse/HBASE-24017) | Turn down flakey rerun rate on all but hot branches | Major | . |
### TESTS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-24015](https://issues.apache.org/jira/browse/HBASE-24015) | Coverage for Assign and Unassign of Regions on RegionServer on failure | Major | amv2 |
| [HBASE-25156](https://issues.apache.org/jira/browse/HBASE-25156) | TestMasterFailover.testSimpleMasterFailover is flaky | Major | test |
| [HBASE-24979](https://issues.apache.org/jira/browse/HBASE-24979) | Include batch mutatations in client operation timeout tests | Major | . |
| [HBASE-24894](https://issues.apache.org/jira/browse/HBASE-24894) | [Flakey Test] TestStochasticLoadBalancer.testMoveCostMultiplier | Major | Balancer, master, test |
### SUB-TASKS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-25127](https://issues.apache.org/jira/browse/HBASE-25127) | Enhance PerformanceEvaluation to profile meta replica performance. | Major | . |
| [HBASE-25284](https://issues.apache.org/jira/browse/HBASE-25284) | Check-in "Enable memstore replication..." design | Major | . |
| [HBASE-25126](https://issues.apache.org/jira/browse/HBASE-25126) | Add load balance logic in hbase-client to distribute read load over meta replica regions. | Major | . |
| [HBASE-25291](https://issues.apache.org/jira/browse/HBASE-25291) | Document how to enable the meta replica load balance mode for the client and clean up around hbase:meta read replicas | Major | . |
| [HBASE-25253](https://issues.apache.org/jira/browse/HBASE-25253) | Deprecated master carrys regions related methods and configs | Major | Balancer, master |
| [HBASE-25203](https://issues.apache.org/jira/browse/HBASE-25203) | Change the reference url to flaky list in our jenkins jobs | Major | flakies, jenkins |
| [HBASE-25194](https://issues.apache.org/jira/browse/HBASE-25194) | Do not publish workspace in flaky find job | Major | jenkins |
| [HBASE-25169](https://issues.apache.org/jira/browse/HBASE-25169) | Update documentation about meta region replica | Major | documentation |
| [HBASE-25164](https://issues.apache.org/jira/browse/HBASE-25164) | Make ModifyTableProcedure support changing meta replica count | Major | meta, read replicas |
| [HBASE-25162](https://issues.apache.org/jira/browse/HBASE-25162) | Make flaky tests run more aggressively | Major | jenkins, scripts, test |
| [HBASE-25163](https://issues.apache.org/jira/browse/HBASE-25163) | Increase the timeout value for nightly jobs | Major | jenkins, scripts, test |
| [HBASE-22976](https://issues.apache.org/jira/browse/HBASE-22976) | [HBCK2] Add RecoveredEditsPlayer | Major | hbck2, walplayer |
| [HBASE-25124](https://issues.apache.org/jira/browse/HBASE-25124) | Support changing region replica count without disabling table | Major | meta, proc-v2 |
| [HBASE-23959](https://issues.apache.org/jira/browse/HBASE-23959) | Fix javadoc for JDK11 | Major | . |
| [HBASE-25151](https://issues.apache.org/jira/browse/HBASE-25151) | warmupRegion frustrates registering WALs on the catalog replicationsource | Major | read replicas |
| [HBASE-25154](https://issues.apache.org/jira/browse/HBASE-25154) | Set java.io.tmpdir to project build directory to avoid writing std\*deferred files to /tmp | Major | build, test |
| [HBASE-25121](https://issues.apache.org/jira/browse/HBASE-25121) | Refactor MetaTableAccessor.addRegionsToMeta and its usage places | Major | meta |
| [HBASE-25055](https://issues.apache.org/jira/browse/HBASE-25055) | Add ReplicationSource for meta WALs; add enable/disable when hbase:meta assigned to RS | Major | . |
| [HBASE-25133](https://issues.apache.org/jira/browse/HBASE-25133) | Migrate HBase Nightly jenkins job from Hadoop to hbase | Major | jenkins, scripts |
| [HBASE-25132](https://issues.apache.org/jira/browse/HBASE-25132) | Migrate flaky test jenkins job from Hadoop to hbase | Major | jenkins, scripts |
| [HBASE-25103](https://issues.apache.org/jira/browse/HBASE-25103) | Remove ZNodePaths.metaReplicaZNodes | Major | . |
| [HBASE-25107](https://issues.apache.org/jira/browse/HBASE-25107) | Migrate flaky reporting jenkins job from Hadoop to hbase | Major | jenkins, scripts |
| [HBASE-25068](https://issues.apache.org/jira/browse/HBASE-25068) | Pass WALFactory to Replication so it knows of all WALProviders, not just default/user-space | Minor | . |
| [HBASE-25067](https://issues.apache.org/jira/browse/HBASE-25067) | Edit of log messages around async WAL Replication; checkstyle fixes; and a bugfix | Major | . |
| [HBASE-24857](https://issues.apache.org/jira/browse/HBASE-24857) | Fix several problems when starting webUI | Minor | canary, UI |
| [HBASE-24964](https://issues.apache.org/jira/browse/HBASE-24964) | Remove MetaTableAccessor.tableExists | Major | meta |
| [HBASE-24765](https://issues.apache.org/jira/browse/HBASE-24765) | Dynamic master discovery | Major | Client |
| [HBASE-24945](https://issues.apache.org/jira/browse/HBASE-24945) | Remove MetaTableAccessor.getRegionCount | Major | mapreduce, meta |
| [HBASE-24944](https://issues.apache.org/jira/browse/HBASE-24944) | Remove MetaTableAccessor.getTableRegionsAndLocations in hbase-rest module | Major | meta, REST |
| [HBASE-24918](https://issues.apache.org/jira/browse/HBASE-24918) | Make RegionInfo#UNDEFINED IA.Private | Major | . |
| [HBASE-24806](https://issues.apache.org/jira/browse/HBASE-24806) | Small Updates to Functionality of Shell IRB Workspace | Major | shell |
| [HBASE-24876](https://issues.apache.org/jira/browse/HBASE-24876) | Fix the flaky job url in hbase-personality.sh | Major | . |
| [HBASE-24841](https://issues.apache.org/jira/browse/HBASE-24841) | Change the jenkins job urls in our jenkinsfile | Major | build, scripts |
| [HBASE-24680](https://issues.apache.org/jira/browse/HBASE-24680) | Refactor the checkAndMutate code on the server side | Major | . |
| [HBASE-24817](https://issues.apache.org/jira/browse/HBASE-24817) | Allow configuring WALEntry filters on ReplicationSource | Major | Replication, wal |
| [HBASE-24632](https://issues.apache.org/jira/browse/HBASE-24632) | Enable procedure-based log splitting as default in hbase3 | Major | wal |
| [HBASE-24718](https://issues.apache.org/jira/browse/HBASE-24718) | Generic NamedQueue framework for recent in-memory history (refactor slowlog) | Major | . |
| [HBASE-24698](https://issues.apache.org/jira/browse/HBASE-24698) | Turn OFF Canary WebUI as default | Major | canary |
| [HBASE-24650](https://issues.apache.org/jira/browse/HBASE-24650) | Change the return types of the new checkAndMutate methods introduced in HBASE-8458 | Major | Client |
| [HBASE-24013](https://issues.apache.org/jira/browse/HBASE-24013) | Bump branch-2 version to 2.4.0-SNAPSHOT | Major | . |
### OTHER:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-25099](https://issues.apache.org/jira/browse/HBASE-25099) | Change meta replica count by altering meta table descriptor | Major | meta, read replicas |
| [HBASE-25320](https://issues.apache.org/jira/browse/HBASE-25320) | Upgrade hbase-thirdparty dependency to 3.4.1 | Blocker | dependencies |
| [HBASE-24640](https://issues.apache.org/jira/browse/HBASE-24640) | Purge use of VisibleForTesting | Major | community |
| [HBASE-24081](https://issues.apache.org/jira/browse/HBASE-24081) | Provide documentation for running Yetus with HBase | Major | documentation |
| [HBASE-24667](https://issues.apache.org/jira/browse/HBASE-24667) | Rename configs that support atypical DNS set ups to put them in hbase.unsafe | Major | conf, Operability |
| [HBASE-25228](https://issues.apache.org/jira/browse/HBASE-25228) | Delete dev-support/jenkins\_precommit\_jira\_yetus.sh | Minor | build |
| [HBASE-24200](https://issues.apache.org/jira/browse/HBASE-24200) | Upgrade to Yetus 0.12.0 | Minor | build |
| [HBASE-25120](https://issues.apache.org/jira/browse/HBASE-25120) | Remove the deprecated annotation for MetaTableAccessor.getScanForTableName | Major | meta |
| [HBASE-25073](https://issues.apache.org/jira/browse/HBASE-25073) | Should not use XXXService.Interface.class.getSimpleName as stub key prefix in AsyncConnectionImpl | Major | Client |
| [HBASE-25072](https://issues.apache.org/jira/browse/HBASE-25072) | Remove the unnecessary System.out.println in MasterRegistry | Minor | Client |
| [HBASE-25004](https://issues.apache.org/jira/browse/HBASE-25004) | Log RegionTooBusyException details | Major | . |
| [HBASE-24993](https://issues.apache.org/jira/browse/HBASE-24993) | Remove OfflineMetaRebuildTestCore | Major | test |
| [HBASE-24809](https://issues.apache.org/jira/browse/HBASE-24809) | Yetus IA Javadoc links are no longer available | Minor | . |
| [HBASE-14847](https://issues.apache.org/jira/browse/HBASE-14847) | Add FIFO compaction section to HBase book | Major | documentation |
| [HBASE-24843](https://issues.apache.org/jira/browse/HBASE-24843) | Sort the constants in \`hbase\_constants.rb\` | Minor | shell |
| [HBASE-24835](https://issues.apache.org/jira/browse/HBASE-24835) | Normalizer should log a successful run at INFO level | Minor | Normalizer |
| [HBASE-24779](https://issues.apache.org/jira/browse/HBASE-24779) | Improve insight into replication WAL readers hung on checkQuota | Minor | Replication |
| [HBASE-24662](https://issues.apache.org/jira/browse/HBASE-24662) | Update DumpClusterStatusAction to notice changes in region server count | Major | integration tests |
| [HBASE-24658](https://issues.apache.org/jira/browse/HBASE-24658) | Update PolicyBasedChaosMonkey to handle uncaught exceptions | Minor | integration tests |
| [HBASE-24648](https://issues.apache.org/jira/browse/HBASE-24648) | Remove the legacy 'forceSplit' related code at region server side | Major | regionserver |
| [HBASE-24492](https://issues.apache.org/jira/browse/HBASE-24492) | ProtobufLogReader.readNext does not need looping | Minor | Replication, wal |
| [HBASE-22033](https://issues.apache.org/jira/browse/HBASE-22033) | Update to maven-javadoc-plugin 3.2.0 and switch to non-forking aggregate goals | Major | build, website |
## Release 2.3.0
[CHANGES.md at rel/2.3.0 (e0e1382)](https://github.com/apache/hbase/blob/rel/2.3.0/CHANGES.md)
## Release 2.2.0
[CHANGES.md at rel/2.2.0 (3ec6932)](https://github.com/apache/hbase/blob/rel/2.2.0/CHANGES.md)
## Release 2.1.0
[CHANGES.md at rel/2.1.0 (e1673bb)](https://github.com/apache/hbase/blob/rel/2.1.0/CHANGES.md)
## Release 2.0.0
[CHANGES.md at rel/2.0.0 (7483b11)](https://github.com/apache/hbase/blob/rel/2.0.0/CHANGES.md)
## Release 1.0.0
[CHANGES.txt at rel/1.0.0 (6c98bff)](https://github.com/apache/hbase/blob/rel/1.0.0/CHANGES.txt)