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HBASE Changelog

Release 2.4.0 - Unreleased (as of 2020-12-02)

NEW FEATURES:

JIRA	Summary	Priority	Component
HBASE-25242	Add Increment/Append support to RowMutations	Critical	Client, regionserver
HBASE-25278	Add option to toggle CACHE_BLOCKS in count.rb	Minor	shell
HBASE-18070	Enable memstore replication for meta replica	Critical	.
HBASE-24528	Improve balancer decision observability	Major	Admin, Balancer, Operability, shell, UI
HBASE-24776	[hbtop] Support Batch mode	Major	hbtop
HBASE-24602	Add Increment and Append support to CheckAndMutate	Major	.
HBASE-24760	Add a config hbase.rsgroup.fallback.enable for RSGroup fallback feature	Major	rsgroup
HBASE-24694	Support flush a single column family of table	Major	.
HBASE-24289	Heterogeneous Storage for Date Tiered Compaction	Major	Compaction
HBASE-24038	Add a metric to show the locality of ssd in table.jsp	Major	metrics
HBASE-8458	Support for batch version of checkAndMutate()	Major	Client, regionserver

IMPROVEMENTS:

JIRA	Summary	Priority	Component
HBASE-25246	Backup/Restore hbase cell tags.	Major	backup&restore
HBASE-25339	Method parameter and member variable are duplicated in checkSplittable() of SplitTableRegionProcedure	Minor	.
HBASE-25237	'hbase master stop' shuts down the cluster, not the master only	Major	.
HBASE-25324	Remove unnecessary array to list conversion in SplitLogManager	Minor	.
HBASE-25263	Change encryption key generation algorithm used in the HBase shell	Major	encryption, shell
HBASE-25323	Fix potential NPE when the zookeeper path of RegionServerTracker does not exist when start	Minor	.
HBASE-25281	Bulkload split hfile too many times due to unreasonable split point	Minor	tooling
HBASE-25325	Remove unused class ClusterSchemaException	Minor	.
HBASE-25213	Should request Compaction when bulkLoadHFiles is done	Minor	.
HBASE-24877	Add option to avoid aborting RS process upon uncaught exceptions happen on replication source	Major	Replication
HBASE-24664	Some changing of split region by overall region size rather than only one store size	Major	regionserver
HBASE-25026	Create a metric to track full region scans RPCs	Minor	.
HBASE-25289	[testing] Clean up resources after tests in rsgroup_shell_test.rb	Major	rsgroup, test
HBASE-25261	Upgrade Bootstrap to 3.4.1	Major	security, UI
HBASE-25272	Support scan on a specific replica	Critical	Client, scan
HBASE-25267	Add SSL keystore type and truststore related configs for HBase RESTServer	Major	REST
HBASE-25181	Add options for disabling column family encryption and choosing hash algorithm for wrapped encryption keys.	Major	encryption
HBASE-25254	Rewrite TestMultiLogThreshold to remove the LogDelegate in RSRpcServices	Major	logging, test
HBASE-25252	Move HMaster inner classes out	Minor	master
HBASE-25240	gson format of RpcServer.logResponse is abnormal	Minor	.
HBASE-25210	RegionInfo.isOffline is now a duplication with RegionInfo.isSplit	Major	meta
HBASE-25212	Optionally abort requests in progress after deciding a region should close	Major	regionserver
HBASE-24859	Optimize in-memory representation of mapreduce TableSplit objects	Major	mapreduce
HBASE-24967	The table.jsp cost long time to load if the table include closed regions	Major	UI
HBASE-25167	Normalizer support for hot config reloading	Major	master, Normalizer
HBASE-24419	Normalizer merge plans should consider more than 2 regions when possible	Major	master, Normalizer
HBASE-25224	Maximize sleep for checking meta and namespace regions availability	Major	master
HBASE-25223	Use try-with-resources statement in snapshot package	Minor	.
HBASE-25201	YouAreDeadException should be moved to hbase-server module	Major	Client
HBASE-25193	Add support for row prefix and type in the WAL Pretty Printer and some minor fixes	Minor	wal
HBASE-25128	RSGroupInfo's toString() and hashCode() does not take into account configuration map.	Minor	rsgroup
HBASE-24628	Region normalizer now respects a rate limit	Major	Normalizer
HBASE-25179	Assert format is incorrect in HFilePerformanceEvaluation class.	Minor	Performance, test
HBASE-25065	WAL archival to be done by a separate thread	Major	wal
HBASE-14067	bundle ruby files for hbase shell into a jar.	Major	shell
HBASE-24875	Remove the force param for unassign since it dose not take effect any more	Major	Client
HBASE-24025	Improve performance of move_servers_rsgroup and move_tables_rsgroup by using async region move API	Major	rsgroup
HBASE-25160	Refactor AccessController and VisibilityController	Major	.
HBASE-25146	Add extra logging at info level to HFileCorruptionChecker in order to report progress	Major	hbck, hbck2
HBASE-24054	The Jetty's version number leak occurred while using the thrift service	Minor	.
HBASE-25091	Move LogComparator from ReplicationSource to AbstractFSWALProvider#.WALsStartTimeComparator	Minor	.
HBASE-24981	Enable table replication fails from 1.x to 2.x if table already exist at peer.	Major	Replication
HBASE-25109	Add MR Counters to WALPlayer; currently hard to tell if it is doing anything	Major	.
HBASE-25082	Per table WAL metrics: appendCount and appendSize	Major	metrics
HBASE-25079	Upgrade Bootstrap to 3.3.7	Major	security, UI
HBASE-24976	REST Server failes to start without any error message	Major	REST
HBASE-25066	Use FutureUtils.rethrow in AsyncTableResultScanner to better catch the stack trace	Major	Client, Scanners
HBASE-25069	Display region name instead of encoded region name in HBCK report page.	Minor	hbck
HBASE-24991	Replace MovedRegionsCleaner with guava cache	Minor	.
HBASE-25057	Fix typo "memeber"	Trivial	documentation
HBASE-24764	Add support of adding base peer configs via hbase-site.xml for all replication peers.	Minor	Replication
HBASE-25037	Lots of thread pool are changed to non daemon after HBASE-24750 which causes trouble when shutting down	Major	.
HBASE-24831	Avoid invoke Counter using reflection in SnapshotInputFormat	Major	.
HBASE-25002	Create simple pattern matching query for retrieving metrics matching the pattern	Major	.
HBASE-25022	Remove 'hbase.testing.nocluster' config	Major	test
HBASE-25006	Make the cost functions optional for StochastoicBalancer	Major	.
HBASE-24974	Provide a flexibility to print only row key and filter for multiple tables in the WALPrettyPrinter	Minor	wal
HBASE-24994	Add hedgedReadOpsInCurThread metric	Minor	metrics
HBASE-25005	Refactor CatalogJanitor	Major	master, meta
HBASE-24992	log after Generator success when running ITBLL	Trivial	.
HBASE-24937	table.rb use LocalDateTime to replace Instant	Minor	shell
HBASE-24940	runCatalogJanitor() API should return -1 to indicate already running status	Major	.
HBASE-24973	Remove read point parameter in method StoreFlush#performFlush and StoreFlush#createScanner	Minor	.
HBASE-24569	Get hostAndWeights in addition using localhost if it is null in local mode	Minor	regionserver
HBASE-24949	Optimize FSTableDescriptors.get to not always go to fs when cache miss	Major	master
HBASE-24898	Use EnvironmentEdge.currentTime() instead of System.currentTimeMillis() in CurrentHourProvider	Major	tooling
HBASE-24942	MergeTableRegionsProcedure should not call clean merge region	Major	proc-v2, Region Assignment
HBASE-24811	Use class access static field or method	Minor	.
HBASE-24686	[LOG] Log improvement in Connection#close	Major	Client, logging
HBASE-24912	Enlarge MemstoreFlusherChore/CompactionChecker period for unit test	Major	.
HBASE-24627	Normalize one table at a time	Major	Normalizer
HBASE-24872	refactor valueOf PoolType	Minor	Client
HBASE-24854	Correct the help content of assign and unassign commands in hbase shell	Minor	shell
HBASE-24750	All executor service should start using guava ThreadFactory	Major	.
HBASE-24709	Support MoveCostFunction use a lower multiplier in offpeak hours	Major	Balancer
HBASE-24824	Add more stats in PE for read replica	Minor	PE, read replicas
HBASE-21721	FSHLog : reduce write#syncs() times	Major	.
HBASE-24404	Support flush a single column family of region	Major	shell
HBASE-24826	Add some comments for processlist in hbase shell	Minor	shell
HBASE-24659	Calculate FIXED_OVERHEAD automatically	Major	.
HBASE-24827	BackPort HBASE-11554 Remove Reusable poolmap Rpc client type.	Major	Client
HBASE-24823	Port HBASE-22762 Print the delta between phases in the split/merge/compact/flush transaction journals to master branch	Minor	.
HBASE-24795	RegionMover should deal with unknown (split/merged) regions	Major	.
HBASE-24821	Simplify the logic of getRegionInfo in TestFlushFromClient to reduce redundancy code	Minor	test
HBASE-24704	Make the Table Schema easier to view even there are multiple families	Major	UI
HBASE-24695	FSHLog - close the current WAL file in a background thread	Major	.
HBASE-24803	Unify hbase-shell ::Shell::Commands::Command#help behavior	Minor	shell
HBASE-11686	Shell code should create a binding / irb workspace instead of polluting the root namespace	Minor	shell
HBASE-20226	Performance Improvement Taking Large Snapshots In Remote Filesystems	Minor	snapshots
HBASE-24669	Logging of ppid should be consistent across all occurrences	Minor	Operability, proc-v2
HBASE-24757	ReplicationSink should limit the batch rowcount for batch mutations based on hbase.rpc.rows.warning.threshold	Major	.
HBASE-24777	InfoServer support ipv6 host and port	Minor	UI
HBASE-24758	Avoid flooding replication source RSes logs when no sinks are available	Major	Replication
HBASE-24743	Reject to add a peer which replicate to itself earlier	Major	.
HBASE-24696	Include JVM information on Web UI under "Software Attributes"	Minor	UI
HBASE-24747	Log an ERROR if HBaseSaslRpcServer initialisation fails with an uncaught exception	Major	.
HBASE-24586	Add table level locality in table.jsp	Major	UI
HBASE-24663	Add procedure process time statistics UI	Major	.
HBASE-24653	Show snapshot owner on Master WebUI	Major	.
HBASE-24431	RSGroupInfo add configuration map to store something extra	Major	rsgroup
HBASE-24671	Add excludefile and designatedfile options to graceful_stop.sh	Major	.
HBASE-24560	Add a new option of designatedfile in RegionMover	Major	.
HBASE-24382	Flush partial stores of region filtered by seqId when archive wal due to too many wals	Major	wal
HBASE-24208	Remove RS entry from zk draining servers node after RS been stopped	Major	.
HBASE-24456	Immutable Scan as unmodifiable subclass or wrapper of Scan	Major	.
HBASE-24471	The way we bootstrap meta table is confusing	Major	master, meta, proc-v2
HBASE-24350	HBase table level replication metrics for shippedBytes are always 0	Major	Replication
HBASE-24311	Add more details in MultiVersionConcurrencyControl STUCK log message	Major	.

BUG FIXES:

JIRA	Summary	Priority	Component
HBASE-25349	[Flakey Tests] branch-2 TestRefreshRecoveredReplication.testReplicationRefreshSource:141 Waiting timed out after [60,000] msec	Major	flakies
HBASE-25332	one NPE	Major	Zookeeper
HBASE-25345	[Flakey Tests] branch-2 TestReadReplicas#testVerifySecondaryAbilityToReadWithOnFiles	Major	test
HBASE-25307	ThreadLocal pooling leads to NullPointerException	Major	Client
HBASE-25341	Fix ErrorProne error which causes nightly to fail	Major	test
HBASE-25330	RSGroupInfoManagerImpl#moveServers return is not set of servers moved	Major	rsgroup
HBASE-25321	The sort icons not shown after Upgrade JQuery to 3.5.1	Major	UI
HBASE-24268	REST and Thrift server do not handle the "doAs" parameter case insensitively	Minor	REST, Thrift
HBASE-25050	We initialize Filesystems more than once.	Minor	.
HBASE-25311	ui throws NPE	Major	.
HBASE-25306	The log in SimpleLoadBalancer#onConfigurationChange is wrong	Major	.
HBASE-25300	'Unknown table hbase:quota' happens when desc table in shell if quota disabled	Major	shell
HBASE-25255	Master fails to initialize when creating rs group table	Critical	master, rsgroup
HBASE-25275	Upgrade asciidoctor	Blocker	website
HBASE-25276	Need to throw the original exception in HRegion#openHRegion	Major	.
HBASE-20598	Upgrade to JRuby 9.2	Major	dependencies, shell
HBASE-25216	The client zk syncer should deal with meta replica count change	Major	master, Zookeeper
HBASE-25238	Upgrading HBase from 2.2.0 to 2.3.x fails because of “Message missing required fields: state”	Critical	.
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	WAL replay should ignore 0-length files	Major	master, regionserver
HBASE-25090	CompactionConfiguration logs unrealistic store file sizes	Minor	Compaction
HBASE-24977	Meta table shouldn't be modified as read only	Major	meta
HBASE-25176	MasterStoppedException should be moved to hbase-client module	Major	Client
HBASE-25206	Data loss can happen if a cloned table loses original split region(delete table)	Major	proc-v2, Region Assignment, snapshots
HBASE-25207	Revisit the implementation and usage of RegionStates.include	Major	Region Assignment
HBASE-25186	TestMasterRegionOnTwoFileSystems is failing after HBASE-25065	Blocker	master
HBASE-25204	Nightly job failed as the name of jdk and maven changed	Major	.
HBASE-25093	the RSGroupBasedLoadBalancer#retainAssignment throws NPE	Major	rsgroup
HBASE-25117	ReplicationSourceShipper thread can not be finished	Major	.
HBASE-25168	Unify WAL name timestamp parsers	Major	.
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	Change 'State time' in UI so sorts	Minor	UI
HBASE-25048	[HBCK2] Bypassed parent procedures are not updated in store	Major	hbck2, proc-v2
HBASE-25147	Should store the regionNames field in state data for ReopenTableRegionsProcedure	Major	proc-v2
HBASE-25115	HFilePrettyPrinter can't seek to the row which is the first row of a hfile	Major	HFile, tooling
HBASE-25135	Convert the internal seperator while emitting the memstore read metrics to #	Minor	.
HBASE-24665	MultiWAL : Avoid rolling of ALL WALs when one of the WAL needs a roll	Major	wal
HBASE-25096	WAL size in RegionServer UI is wrong	Major	.
HBASE-25077	hbck.jsp page loading fails, logs NPE in master log.	Major	hbck
HBASE-25088	CatalogFamilyFormat/MetaTableAccessor.parseRegionInfoFromRegionName incorrectly setEndKey to regionId	Critical	meta
HBASE-25097	Wrong RIT page number in Master UI	Minor	UI
HBASE-24896	'Stuck' in static initialization creating RegionInfo instance	Major	.
HBASE-24956	ConnectionManager#locateRegionInMeta waits for user region lock indefinitely.	Major	Client
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	WAL split edits number is negative in RegionServerUI	Minor	UI, wal
HBASE-25021	Nightly job should skip hadoop-2 integration test for master	Major	build, scripts
HBASE-25012	HBASE-24359 causes replication missed log of some RemoteException	Major	Replication
HBASE-25009	Hbck chore logs wrong message when loading regions from RS report	Minor	.
HBASE-25014	ScheduledChore is never triggered when initalDelay > 1.5*period	Major	.
HBASE-25016	Should close ResultScanner in MetaTableAccessor.scanByRegionEncodedName	Critical	master, meta
HBASE-24958	CompactingMemStore.timeOfOldestEdit error update	Critical	regionserver
HBASE-24995	MetaFixer fails to fix overlaps when multiple tables have overlaps	Major	hbck2
HBASE-24719	Renaming invalid rsgroup throws NPE instead of proper error message	Major	.
HBASE-19352	Port HADOOP-10379: Protect authentication cookies with the HttpOnly and Secure flags	Major	.
HBASE-24971	Upgrade JQuery to 3.5.1	Major	security, UI
HBASE-24968	One of static initializers of CellComparatorImpl referring to subclass MetaCellComparator	Major	.
HBASE-24916	Region hole contains wrong regions pair when hole is created by first region deletion	Major	hbck2
HBASE-24885	STUCK RIT by hbck2 assigns	Major	hbck2, Region Assignment
HBASE-24926	Should call setFailure in MergeTableRegionsProcedure when isMergeable returns false	Major	master, proc-v2
HBASE-24884	BulkLoadHFilesTool/LoadIncrementalHFiles should accept -D options from command line parameters	Minor	.
HBASE-24583	Normalizer can't actually merge empty regions when neighbor is larger than average size	Major	master, Normalizer
HBASE-24844	Exception on standalone (master) shutdown	Minor	Zookeeper
HBASE-24856	Fix error prone error in FlushTableSubprocedure	Major	.
HBASE-24838	The pre commit job fails to archive surefire reports	Critical	build, scripts
HBASE-23157	WAL unflushed seqId tracking may wrong when Durability.ASYNC_WAL is used	Major	regionserver, wal
HBASE-24625	AsyncFSWAL.getLogFileSizeIfBeingWritten does not return the expected synced file length.	Critical	Replication, wal
HBASE-24830	Some tests involving RS crash fail with NullPointerException after HBASE-24632 in branch-2	Major	.
HBASE-24788	Fix the connection leaks on getting hbase admin from unclosed connection	Major	mapreduce
HBASE-24805	HBaseTestingUtility.getConnection should be threadsafe	Major	test
HBASE-24808	skip empty log cleaner delegate class names (WAS => cleaner.CleanerChore: Can NOT create CleanerDelegate= ClassNotFoundException)	Trivial	.
HBASE-24767	Change default to false for HBASE-15519 per-user metrics	Major	metrics
HBASE-24713	RS startup with FSHLog throws NPE after HBASE-21751	Minor	wal
HBASE-24794	hbase.rowlock.wait.duration should not be <= 0	Minor	regionserver
HBASE-24797	Move log code out of loop	Minor	Normalizer
HBASE-24752	NPE/500 accessing webui on master startup	Minor	master
HBASE-24766	Document Remote Procedure Execution	Major	documentation
HBASE-11676	Scan FORMATTER is not applied for columns using non-printable name in shell	Minor	shell
HBASE-24738	[Shell] processlist command fails with ERROR: Unexpected end of file from server when SSL enabled	Major	shell
HBASE-24675	On Master restart all servers are assigned to default rsgroup.	Major	rsgroup
HBASE-22146	SpaceQuotaViolationPolicy Disable is not working in Namespace level	Major	.
HBASE-24742	Improve performance of SKIP vs SEEK logic	Major	Performance, regionserver
HBASE-24710	Incorrect checksum calculation in saveVersion.sh	Major	scripts
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	Add hbase.master.balancer.stochastic.moveCost.offpeak to doc as support dynamically change	Minor	documentation
HBASE-24746	The sort icons overlap the col name in master UI	Major	UI
HBASE-24721	rename_rsgroup overwriting the existing rsgroup.	Major	.
HBASE-24615	MutableRangeHistogram#updateSnapshotRangeMetrics doesn't calculate the distribution for last bucket.	Major	metrics
HBASE-24705	MetaFixer#fixHoles() does not include the case for read replicas (i.e, replica regions are not created)	Major	read replicas
HBASE-24720	Meta replicas not cleaned when disabled	Minor	read replicas
HBASE-24693	regioninfo#isLast() has a logic error	Minor	.
HBASE-23744	FastPathBalancedQueueRpcExecutor should enforce queue length of 0	Minor	.
HBASE-22738	Fallback to default group to choose RS when there are no RS in current group	Major	rsgroup
HBASE-23126	IntegrationTestRSGroup is useless now	Major	rsgroup
HBASE-24518	waitForNamespaceOnline() should return false if any region is offline	Major	.
HBASE-24564	Make RS abort call idempotent	Major	regionserver
HBASE-24340	PerformanceEvaluation options should not mandate any specific order	Minor	.
HBASE-24130	rat plugin complains about having an unlicensed file.	Minor	.
HBASE-24017	Turn down flakey rerun rate on all but hot branches	Major	.

TESTS:

JIRA	Summary	Priority	Component
HBASE-24015	Coverage for Assign and Unassign of Regions on RegionServer on failure	Major	amv2
HBASE-25156	TestMasterFailover.testSimpleMasterFailover is flaky	Major	test
HBASE-24979	Include batch mutatations in client operation timeout tests	Major	.
HBASE-24894	[Flakey Test] TestStochasticLoadBalancer.testMoveCostMultiplier	Major	Balancer, master, test

SUB-TASKS:

JIRA	Summary	Priority	Component
HBASE-25127	Enhance PerformanceEvaluation to profile meta replica performance.	Major	.
HBASE-25284	Check-in "Enable memstore replication..." design	Major	.
HBASE-25126	Add load balance logic in hbase-client to distribute read load over meta replica regions.	Major	.
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	Deprecated master carrys regions related methods and configs	Major	Balancer, master
HBASE-25203	Change the reference url to flaky list in our jenkins jobs	Major	flakies, jenkins
HBASE-25194	Do not publish workspace in flaky find job	Major	jenkins
HBASE-25169	Update documentation about meta region replica	Major	documentation
HBASE-25164	Make ModifyTableProcedure support changing meta replica count	Major	meta, read replicas
HBASE-25162	Make flaky tests run more aggressively	Major	jenkins, scripts, test
HBASE-25163	Increase the timeout value for nightly jobs	Major	jenkins, scripts, test
HBASE-22976	[HBCK2] Add RecoveredEditsPlayer	Major	hbck2, walplayer
HBASE-25124	Support changing region replica count without disabling table	Major	meta, proc-v2
HBASE-23959	Fix javadoc for JDK11	Major	.
HBASE-25151	warmupRegion frustrates registering WALs on the catalog replicationsource	Major	read replicas
HBASE-25154	Set java.io.tmpdir to project build directory to avoid writing std*deferred files to /tmp	Major	build, test
HBASE-25121	Refactor MetaTableAccessor.addRegionsToMeta and its usage places	Major	meta
HBASE-25055	Add ReplicationSource for meta WALs; add enable/disable when hbase:meta assigned to RS	Major	.
HBASE-25133	Migrate HBase Nightly jenkins job from Hadoop to hbase	Major	jenkins, scripts
HBASE-25132	Migrate flaky test jenkins job from Hadoop to hbase	Major	jenkins, scripts
HBASE-25103	Remove ZNodePaths.metaReplicaZNodes	Major	.
HBASE-25107	Migrate flaky reporting jenkins job from Hadoop to hbase	Major	jenkins, scripts
HBASE-25068	Pass WALFactory to Replication so it knows of all WALProviders, not just default/user-space	Minor	.
HBASE-25067	Edit of log messages around async WAL Replication; checkstyle fixes; and a bugfix	Major	.
HBASE-24857	Fix several problems when starting webUI	Minor	canary, UI
HBASE-24964	Remove MetaTableAccessor.tableExists	Major	meta
HBASE-24765	Dynamic master discovery	Major	Client
HBASE-24945	Remove MetaTableAccessor.getRegionCount	Major	mapreduce, meta
HBASE-24944	Remove MetaTableAccessor.getTableRegionsAndLocations in hbase-rest module	Major	meta, REST
HBASE-24918	Make RegionInfo#UNDEFINED IA.Private	Major	.
HBASE-24806	Small Updates to Functionality of Shell IRB Workspace	Major	shell
HBASE-24876	Fix the flaky job url in hbase-personality.sh	Major	.
HBASE-24841	Change the jenkins job urls in our jenkinsfile	Major	build, scripts
HBASE-24680	Refactor the checkAndMutate code on the server side	Major	.
HBASE-24817	Allow configuring WALEntry filters on ReplicationSource	Major	Replication, wal
HBASE-24632	Enable procedure-based log splitting as default in hbase3	Major	wal
HBASE-24718	Generic NamedQueue framework for recent in-memory history (refactor slowlog)	Major	.
HBASE-24698	Turn OFF Canary WebUI as default	Major	canary
HBASE-24650	Change the return types of the new checkAndMutate methods introduced in HBASE-8458	Major	Client
HBASE-24013	Bump branch-2 version to 2.4.0-SNAPSHOT	Major	.

OTHER:

JIRA	Summary	Priority	Component
HBASE-25099	Change meta replica count by altering meta table descriptor	Major	meta, read replicas
HBASE-25320	Upgrade hbase-thirdparty dependency to 3.4.1	Blocker	dependencies
HBASE-24640	Purge use of VisibleForTesting	Major	community
HBASE-24081	Provide documentation for running Yetus with HBase	Major	documentation
HBASE-24667	Rename configs that support atypical DNS set ups to put them in hbase.unsafe	Major	conf, Operability
HBASE-25228	Delete dev-support/jenkins_precommit_jira_yetus.sh	Minor	build
HBASE-24200	Upgrade to Yetus 0.12.0	Minor	build
HBASE-25120	Remove the deprecated annotation for MetaTableAccessor.getScanForTableName	Major	meta
HBASE-25073	Should not use XXXService.Interface.class.getSimpleName as stub key prefix in AsyncConnectionImpl	Major	Client
HBASE-25072	Remove the unnecessary System.out.println in MasterRegistry	Minor	Client
HBASE-25004	Log RegionTooBusyException details	Major	.
HBASE-24993	Remove OfflineMetaRebuildTestCore	Major	test
HBASE-24809	Yetus IA Javadoc links are no longer available	Minor	.
HBASE-14847	Add FIFO compaction section to HBase book	Major	documentation
HBASE-24843	Sort the constants in `hbase_constants.rb`	Minor	shell
HBASE-24835	Normalizer should log a successful run at INFO level	Minor	Normalizer
HBASE-24779	Improve insight into replication WAL readers hung on checkQuota	Minor	Replication
HBASE-24662	Update DumpClusterStatusAction to notice changes in region server count	Major	integration tests
HBASE-24658	Update PolicyBasedChaosMonkey to handle uncaught exceptions	Minor	integration tests
HBASE-24648	Remove the legacy 'forceSplit' related code at region server side	Major	regionserver
HBASE-24492	ProtobufLogReader.readNext does not need looping	Minor	Replication, wal
HBASE-22033	Update to maven-javadoc-plugin 3.2.0 and switch to non-forking aggregate goals	Major	build, website