You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by zg...@apache.org on 2020/07/17 01:30:07 UTC
svn commit: r40527 [2/4] - /dev/hbase/2.2.6RC0/
Added: dev/hbase/2.2.6RC0/CHANGES.md
==============================================================================
--- dev/hbase/2.2.6RC0/CHANGES.md (added)
+++ dev/hbase/2.2.6RC0/CHANGES.md Fri Jul 17 01:30:07 2020
@@ -0,0 +1,1480 @@
+# HBASE Changelog
+
+<!---
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements. See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership. The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# Be careful doing manual edits in this file. Do not change format
+# of release header or remove the below marker. This file is generated.
+# DO NOT REMOVE THIS MARKER; FOR INTERPOLATING CHANGES!-->
+## Release 2.2.6 - Unreleased (as of 2020-07-16)
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-24467](https://issues.apache.org/jira/browse/HBASE-24467) | Backport HBASE-23963: Split TestFromClientSide; it takes too long to complete timing out | Major | . |
+| [HBASE-24562](https://issues.apache.org/jira/browse/HBASE-24562) | Stabilize master startup with meta replicas enabled | Major | meta, read replicas |
+| [HBASE-24603](https://issues.apache.org/jira/browse/HBASE-24603) | Zookeeper sync() call is async | Critical | master, regionserver |
+| [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-24102](https://issues.apache.org/jira/browse/HBASE-24102) | RegionMover should exclude draining/decommissioning nodes from target RSs | Major | . |
+| [HBASE-24592](https://issues.apache.org/jira/browse/HBASE-24592) | [brnach-2.2] Upgrade junit to 4.13 | Major | . |
+| [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-24483](https://issues.apache.org/jira/browse/HBASE-24483) | Add repeated prefix logging for MultipleColumnPrefixFilter | Minor | Filters |
+| [HBASE-24504](https://issues.apache.org/jira/browse/HBASE-24504) | refactor call setupCluster/tearDownCluster in TestTableSnapshotInputFormat | Minor | mapreduce, test |
+| [HBASE-24412](https://issues.apache.org/jira/browse/HBASE-24412) | Canary support check only one column family per RegionTask | Major | canary |
+| [HBASE-24455](https://issues.apache.org/jira/browse/HBASE-24455) | Correct the doc of "On the number of column families" | Minor | documentation |
+| [HBASE-24470](https://issues.apache.org/jira/browse/HBASE-24470) | Add store file info when log meessages in HStore. | Minor | logging, regionserver |
+| [HBASE-24416](https://issues.apache.org/jira/browse/HBASE-24416) | RegionNormalizer spliting region should not be limited by hbase.normalizer.min.region.count | Major | . |
+| [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-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-24578](https://issues.apache.org/jira/browse/HBASE-24578) | [WAL] Add a parameter to config RingBufferEventHandler's SyncFuture count | Major | wal |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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-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-24625](https://issues.apache.org/jira/browse/HBASE-24625) | AsyncFSWAL.getLogFileSizeIfBeingWritten does not return the expected synced file length. | Critical | Replication, wal |
+| [HBASE-24593](https://issues.apache.org/jira/browse/HBASE-24593) | [branch-2.2] Fix the maven compilation failure for nightly build | Major | . |
+| [HBASE-24546](https://issues.apache.org/jira/browse/HBASE-24546) | CloneSnapshotProcedure unlimited retry | Major | snapshots |
+| [HBASE-24657](https://issues.apache.org/jira/browse/HBASE-24657) | JsonBean representation of metrics at /jmx endpoint now quotes all numbers | Minor | metrics |
+| [HBASE-24117](https://issues.apache.org/jira/browse/HBASE-24117) | Shutdown AssignmentManager before ProcedureExecutor may cause SCP to accidentally skip assigning a region | Critical | proc-v2 |
+| [HBASE-24600](https://issues.apache.org/jira/browse/HBASE-24600) | Empty RegionAction added to MultiRequest in case of RowMutations/CheckAndMutate batch | Major | . |
+| [HBASE-24446](https://issues.apache.org/jira/browse/HBASE-24446) | Use EnvironmentEdgeManager to compute clock skew in Master | Minor | . |
+| [HBASE-24579](https://issues.apache.org/jira/browse/HBASE-24579) | Failed SASL authentication does not result in an exception on client side | Major | rpc |
+| [HBASE-24550](https://issues.apache.org/jira/browse/HBASE-24550) | Passing '-h' or '--help' to bin/hbase doesn't do as expected | Trivial | Operability, shell |
+| [HBASE-24516](https://issues.apache.org/jira/browse/HBASE-24516) | Parameter copyFiles should be passed in SecureBulkLoadClient | Minor | Replication |
+| [HBASE-24517](https://issues.apache.org/jira/browse/HBASE-24517) | AssignmentManager.start should add meta region to ServerStateNode | Critical | amv2 |
+| [HBASE-24189](https://issues.apache.org/jira/browse/HBASE-24189) | WALSplit recreates region dirs for deleted table with recovered edits data | Major | regionserver, wal |
+| [HBASE-23195](https://issues.apache.org/jira/browse/HBASE-23195) | FSDataInputStreamWrapper unbuffer can NOT invoke the classes that NOT implements CanUnbuffer but its parents class implements CanUnbuffer | Critical | io |
+| [HBASE-24529](https://issues.apache.org/jira/browse/HBASE-24529) | hbase.rs.evictblocksonclose is not honored when removing compacted files and closing the storefiles | Major | . |
+| [HBASE-24532](https://issues.apache.org/jira/browse/HBASE-24532) | Execute region plans with throttle should return succeeded plans | Major | . |
+| [HBASE-24511](https://issues.apache.org/jira/browse/HBASE-24511) | Ability to configure timeout between RPC retry to RS from master | Major | . |
+| [HBASE-24444](https://issues.apache.org/jira/browse/HBASE-24444) | Should shutdown mini cluster after class in TestMetaAssignmentWithStopMaster | Minor | test |
+| [HBASE-24515](https://issues.apache.org/jira/browse/HBASE-24515) | batch Increment/Append fails when retrying the RPC | Major | . |
+| [HBASE-24506](https://issues.apache.org/jira/browse/HBASE-24506) | async client deadlock | Blocker | asyncclient |
+| [HBASE-24513](https://issues.apache.org/jira/browse/HBASE-24513) | The default readRpcTimeout and writeRpcTimeout is incorrectly calculated in AsyncConnectionConfiguration | Critical | asyncclient, Client |
+| [HBASE-24499](https://issues.apache.org/jira/browse/HBASE-24499) | Use a client property for SaslConnection MAX\_ATTEMPTS (currently hardcoded to 5) | Minor | Client, security |
+| [HBASE-24280](https://issues.apache.org/jira/browse/HBASE-24280) | Hadoop2 and Hadoop3 profiles being activated simultaneously causing test failures | Major | . |
+| [HBASE-24454](https://issues.apache.org/jira/browse/HBASE-24454) | BucketCache disabled instantly before error duration toleration is reached due to timing issue | Major | BucketCache |
+| [HBASE-24379](https://issues.apache.org/jira/browse/HBASE-24379) | CatalogJanitor misreports region holes when there are actually over laps. | Major | master |
+| [HBASE-24426](https://issues.apache.org/jira/browse/HBASE-24426) | Missing regionName while logging warning in HBCKServerCrashProcedure | Minor | . |
+| [HBASE-24401](https://issues.apache.org/jira/browse/HBASE-24401) | Cell size limit check on append should consider 0 or less value to disable the check | Major | . |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-21905](https://issues.apache.org/jira/browse/HBASE-21905) | TestFIFOCompactionPolicy is flaky | Major | test |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-24690](https://issues.apache.org/jira/browse/HBASE-24690) | Set version to 2.2.6 in branch-2.2 for first RC of 2.2.6 | Major | . |
+| [HBASE-24689](https://issues.apache.org/jira/browse/HBASE-24689) | Generate CHANGES.md and RELEASENOTES.md for 2.2.6 | Major | . |
+| [HBASE-24630](https://issues.apache.org/jira/browse/HBASE-24630) | Purge dev javadoc from client bin tarball | Major | build |
+| [HBASE-24598](https://issues.apache.org/jira/browse/HBASE-24598) | Port HBASE-24380 (Improve WAL splitting log lines to enable sessionization) to branch-2.2 | Major | logging, Operability, wal |
+| [HBASE-24347](https://issues.apache.org/jira/browse/HBASE-24347) | Hadoop2&Hadoop3 profiles are both active when pre-commit PR builds run | Major | build |
+| [HBASE-24432](https://issues.apache.org/jira/browse/HBASE-24432) | Set version as 2.2.6-SNAPSHOT in branch-2.2 | Major | . |
+| [HBASE-23771](https://issues.apache.org/jira/browse/HBASE-23771) | [Flakey Tests] Test TestSplitTransactionOnCluster Again | Major | . |
+| [HBASE-24022](https://issues.apache.org/jira/browse/HBASE-24022) | Set version as 2.2.5-SNAPSHOT in branch-2.2 | Major | . |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-24635](https://issues.apache.org/jira/browse/HBASE-24635) | Split TestMetaWithReplicas | Major | test |
+| [HBASE-24367](https://issues.apache.org/jira/browse/HBASE-24367) | ScheduledChore log elapsed timespan in a human-friendly format | Minor | master, regionserver |
+| [HBASE-24500](https://issues.apache.org/jira/browse/HBASE-24500) | The behavior of RegionInfoBuilder.newBuilder(RegionInfo) is strange | Blocker | Client, read replicas |
+
+
+
+## Release 2.2.5 - Unreleased (as of 2020-05-21)
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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-24355](https://issues.apache.org/jira/browse/HBASE-24355) | Fix typos in the HStore#compact annotation | Minor | . |
+| [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-24221](https://issues.apache.org/jira/browse/HBASE-24221) | Support bulkLoadHFile by family | Major | HFile |
+| [HBASE-24302](https://issues.apache.org/jira/browse/HBASE-24302) | Add an "ignoreTimestamps" option (defaulted to false) to HashTable/SyncTable tool | Major | . |
+| [HBASE-24199](https://issues.apache.org/jira/browse/HBASE-24199) | Procedure related metrics is not consumed in the JMX metric | Minor | metrics |
+| [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-24222](https://issues.apache.org/jira/browse/HBASE-24222) | remove FSUtils.checkAccess and replace with FileSystem.access in HBCK | Major | Filesystem Integration |
+| [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-24148](https://issues.apache.org/jira/browse/HBASE-24148) | Upgrade Thrift to 0.13.0: 0.12.0 has outstanding CVEs. | Major | Thrift |
+| [HBASE-24112](https://issues.apache.org/jira/browse/HBASE-24112) | [RSGroup] Support renaming rsgroup | Major | rsgroup |
+| [HBASE-24181](https://issues.apache.org/jira/browse/HBASE-24181) | Add region info when log meessages in HRegion. | Minor | regionserver |
+| [HBASE-24099](https://issues.apache.org/jira/browse/HBASE-24099) | Use a fair ReentrantReadWriteLock for the region close lock | Major | . |
+| [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-24102](https://issues.apache.org/jira/browse/HBASE-24102) | RegionMover should exclude draining/decommissioning nodes from target RSs | Major | . |
+| [HBASE-24021](https://issues.apache.org/jira/browse/HBASE-24021) | Fail fast when bulkLoadHFiles method catch some IOException | Major | HFile, regionserver |
+| [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 | . |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-24364](https://issues.apache.org/jira/browse/HBASE-24364) | [Chaos Monkey] Invalid data block encoding in ChangeEncodingAction | Major | . |
+| [HBASE-24399](https://issues.apache.org/jira/browse/HBASE-24399) | [Flakey Tests] Some UTs about RSGroup should wait RSGroupInfoManager to be online | Minor | rsgroup |
+| [HBASE-20289](https://issues.apache.org/jira/browse/HBASE-20289) | Comparator for NormalizationPlan breaks comparator's convention | Minor | master |
+| [HBASE-24365](https://issues.apache.org/jira/browse/HBASE-24365) | MetricsTableWrapperAggregateImpl runnable fails due to exception and never runs | Minor | metrics |
+| [HBASE-24377](https://issues.apache.org/jira/browse/HBASE-24377) | MemStoreFlusher throw NullPointerException | Major | . |
+| [HBASE-24381](https://issues.apache.org/jira/browse/HBASE-24381) | The Size metrics in Master Webui is wrong if the size is 0 | Major | UI |
+| [HBASE-24135](https://issues.apache.org/jira/browse/HBASE-24135) | TableStateNotFoundException happends when table creation if rsgroup is enable | Minor | . |
+| [HBASE-24165](https://issues.apache.org/jira/browse/HBASE-24165) | maxPoolSize is logged incorrectly in ByteBufferPool | Minor | . |
+| [HBASE-23702](https://issues.apache.org/jira/browse/HBASE-23702) | \`hbase.hstore.flusher.count\` setting to 0 breaks HMaster | Major | regionserver |
+| [HBASE-23832](https://issues.apache.org/jira/browse/HBASE-23832) | Old config hbase.hstore.compactionThreshold is ignored | Critical | . |
+| [HBASE-24190](https://issues.apache.org/jira/browse/HBASE-24190) | Make kerberos value of hbase.security.authentication property case insensitive | Major | . |
+| [HBASE-24363](https://issues.apache.org/jira/browse/HBASE-24363) | Fix failed ut TestAssignmentManagerMetrics for branch-2.2 | Major | . |
+| [HBASE-24349](https://issues.apache.org/jira/browse/HBASE-24349) | Use rubocop 0.81.0 in Dockerfile | Blocker | build |
+| [HBASE-24273](https://issues.apache.org/jira/browse/HBASE-24273) | HBCK's "Orphan Regions on FileSystem" reports regions with referenced HFiles | Critical | hbck2 |
+| [HBASE-24322](https://issues.apache.org/jira/browse/HBASE-24322) | UnsafeAvailChecker should also check that required methods are available | Minor | . |
+| [HBASE-24314](https://issues.apache.org/jira/browse/HBASE-24314) | Some classes still use log4j logger directly | Blocker | logging |
+| [HBASE-24288](https://issues.apache.org/jira/browse/HBASE-24288) | Allow admin user to create table and do bulkLoad | Major | acl |
+| [HBASE-22710](https://issues.apache.org/jira/browse/HBASE-22710) | Wrong result in one case of scan that use raw and versions and filter together | Major | Scanners |
+| [HBASE-24282](https://issues.apache.org/jira/browse/HBASE-24282) | 'scandetail' log message is missing when responseTooSlow happens on the first scan rpc call | Major | Operability |
+| [HBASE-24274](https://issues.apache.org/jira/browse/HBASE-24274) | \`RESTApiClusterManager\` attempts to deserialize response using serialization API | Major | integration tests |
+| [HBASE-24281](https://issues.apache.org/jira/browse/HBASE-24281) | Remove some stale hadoop.version properties in the pom for sub modules | Major | hadoop3, pom |
+| [HBASE-24213](https://issues.apache.org/jira/browse/HBASE-24213) | Backport the pre commit changes for HBASE-24169 to all branches | Major | scripts |
+| [HBASE-24174](https://issues.apache.org/jira/browse/HBASE-24174) | Fix findbugs warning on ServiceAuthorizationManager | Major | . |
+| [HBASE-24177](https://issues.apache.org/jira/browse/HBASE-24177) | MetricsTable#updateFlushTime is wrong | Minor | metrics |
+| [HBASE-23833](https://issues.apache.org/jira/browse/HBASE-23833) | The relocated hadoop-thirdparty protobuf breaks HBase asyncwal | Major | wal |
+| [HBASE-24158](https://issues.apache.org/jira/browse/HBASE-24158) | [Flakey Tests] TestAsyncTableGetMultiThreaded | Major | . |
+| [HBASE-24186](https://issues.apache.org/jira/browse/HBASE-24186) | RegionMover ignores replicationId | Minor | read replicas |
+| [HBASE-24151](https://issues.apache.org/jira/browse/HBASE-24151) | [rsgroup] The master server aborted for IllegalThreadStateException | Minor | rsgroup |
+| [HBASE-24197](https://issues.apache.org/jira/browse/HBASE-24197) | TestHttpServer.testBindAddress failure with latest jetty | Major | . |
+| [HBASE-24176](https://issues.apache.org/jira/browse/HBASE-24176) | user\_permission '.\*' command failed to show all table permissions | Minor | shell |
+| [HBASE-24167](https://issues.apache.org/jira/browse/HBASE-24167) | [Flakey Tests] TestHRegionWithInMemoryFlush#testWritesWhileScanning gets stuck MVCC | Major | . |
+| [HBASE-23998](https://issues.apache.org/jira/browse/HBASE-23998) | Update license for jetty-client | Major | build, dependencies |
+| [HBASE-24074](https://issues.apache.org/jira/browse/HBASE-24074) | ConcurrentModificationException occurred in ReplicationSourceManager while refreshing the peer | Major | Replication |
+| [HBASE-24121](https://issues.apache.org/jira/browse/HBASE-24121) | [Authorization] ServiceAuthorizationManager isn't dynamically updatable. And it should be. | Major | rpc, security |
+| [HBASE-24122](https://issues.apache.org/jira/browse/HBASE-24122) | Change machine ulimit-l to ulimit-a so dumps full ulimit rather than just 'max locked memory' | Major | build |
+| [HBASE-24041](https://issues.apache.org/jira/browse/HBASE-24041) | [regression] Increase RESTServer buffer size back to 64k | Major | REST |
+| [HBASE-24057](https://issues.apache.org/jira/browse/HBASE-24057) | Add modules to mapreduce job classpaths | Major | mapreduce |
+| [HBASE-24040](https://issues.apache.org/jira/browse/HBASE-24040) | WALFactory.Providers.multiwal causes StackOverflowError | Minor | wal |
+| [HBASE-23949](https://issues.apache.org/jira/browse/HBASE-23949) | refactor loadBalancer implements for rsgroup balance by table to achieve overallbalanced | Major | rsgroup |
+| [HBASE-24043](https://issues.apache.org/jira/browse/HBASE-24043) | [Flakey Tests] TestAsyncRegionAdminApi, TestRegionMergeTransactionOnCluster fixes and debug | Major | flakies |
+| [HBASE-24019](https://issues.apache.org/jira/browse/HBASE-24019) | Correct exception messages for table null and namespace unavailable. | Minor | . |
+| [HBASE-24016](https://issues.apache.org/jira/browse/HBASE-24016) | Change nightly poll from cron @daily to pollSCM @daily; i.e. run nightly if a change ONLY | Major | . |
+| [HBASE-22103](https://issues.apache.org/jira/browse/HBASE-22103) | HDFS-13209 in Hadoop 3.3.0 breaks asyncwal | Major | hadoop3, wal |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23957](https://issues.apache.org/jira/browse/HBASE-23957) | [flakey test] client.TestMultiParallel fails to read hbase-site.xml | Minor | test |
+| [HBASE-24080](https://issues.apache.org/jira/browse/HBASE-24080) | [flakey test] TestRegionReplicaFailover.testSecondaryRegionKill fails. | Major | read replicas |
+| [HBASE-23943](https://issues.apache.org/jira/browse/HBASE-23943) | Rubocop configuration needs updated | Minor | build |
+| [HBASE-24115](https://issues.apache.org/jira/browse/HBASE-24115) | Relocate test-only REST "client" from src/ to test/ and mark Private | Major | REST, security |
+| [HBASE-23999](https://issues.apache.org/jira/browse/HBASE-23999) | [flakey test] TestTableOutputFormatConnectionExhaust | Major | test |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-24218](https://issues.apache.org/jira/browse/HBASE-24218) | Add hadoop 3.2.x in hadoop check | Major | scripts |
+| [HBASE-24175](https://issues.apache.org/jira/browse/HBASE-24175) | [Flakey Tests] TestSecureExportSnapshot FileNotFoundException | Major | flakies |
+| [HBASE-23992](https://issues.apache.org/jira/browse/HBASE-23992) | Fix TestAdminShell and TestQuotasShell mistakenly broken by parent commit | Trivial | test |
+| [HBASE-24050](https://issues.apache.org/jira/browse/HBASE-24050) | Deprecated PBType on all 2.x branches | Major | Protobufs |
+| [HBASE-24022](https://issues.apache.org/jira/browse/HBASE-24022) | Set version as 2.2.5-SNAPSHOT in branch-2.2 | Major | . |
+| [HBASE-24009](https://issues.apache.org/jira/browse/HBASE-24009) | Backport the personality changes in HBASE-23989 to all active branches | Major | build |
+| [HBASE-23891](https://issues.apache.org/jira/browse/HBASE-23891) | Add an option to Actions to filter out meta RS | Minor | integration tests |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-24271](https://issues.apache.org/jira/browse/HBASE-24271) | Set values in \`conf/hbase-site.xml\` that enable running on \`LocalFileSystem\` out of the box | Major | . |
+| [HBASE-24258](https://issues.apache.org/jira/browse/HBASE-24258) | [Hadoop3.3] Update license for org.ow2.asm:\* | Minor | dependencies |
+| [HBASE-24301](https://issues.apache.org/jira/browse/HBASE-24301) | Update Apache POM to version 23 | Minor | . |
+| [HBASE-23896](https://issues.apache.org/jira/browse/HBASE-23896) | Snapshot owner cannot delete snapshot when ACL is enabled and Kerberos is not enabled | Major | . |
+| [HBASE-24138](https://issues.apache.org/jira/browse/HBASE-24138) | Ensure StochasticLoadBalancer can log details of decision to not run balancer | Major | Balancer, Operability |
+| [HBASE-23047](https://issues.apache.org/jira/browse/HBASE-23047) | ChecksumUtil.validateChecksum logs an INFO message inside a "if(LOG.isTraceEnabled())" block. | Minor | . |
+
+
+
+## Release 2.2.4 - Unreleased (as of 2020-03-11)
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23710](https://issues.apache.org/jira/browse/HBASE-23710) | Priority configuration for system coprocessors | Major | Coprocessors |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-22827](https://issues.apache.org/jira/browse/HBASE-22827) | Expose multi-region merge in shell and Admin API | Major | Admin, shell |
+| [HBASE-23864](https://issues.apache.org/jira/browse/HBASE-23864) | No need to submit SplitTableRegionProcedure/MergeTableRegionsProcedure when split/merge is disabled | Major | . |
+| [HBASE-23859](https://issues.apache.org/jira/browse/HBASE-23859) | Modify "Block locality" of RegionServer Web UI to human readable percentage | 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-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-23646](https://issues.apache.org/jira/browse/HBASE-23646) | Fix remaining Checkstyle violations in tests of hbase-rest | Minor | . |
+| [HBASE-23674](https://issues.apache.org/jira/browse/HBASE-23674) | Too many rit page Numbers show confusion | Trivial | master |
+| [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-23165](https://issues.apache.org/jira/browse/HBASE-23165) | [hbtop] Some modifications from HBASE-22988 | Minor | . |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23953](https://issues.apache.org/jira/browse/HBASE-23953) | SimpleBalancer bug when second pass to fill up to min | Major | Balancer |
+| [HBASE-23954](https://issues.apache.org/jira/browse/HBASE-23954) | SplitParent region should not be balanced | Major | Balancer |
+| [HBASE-23944](https://issues.apache.org/jira/browse/HBASE-23944) | The method setClusterLoad of SimpleLoadBalancer is incorrect when balance by table | Major | Balancer |
+| [HBASE-23909](https://issues.apache.org/jira/browse/HBASE-23909) | list\_regions fails if table is under split | Minor | shell |
+| [HBASE-23892](https://issues.apache.org/jira/browse/HBASE-23892) | SecureTestCluster should allow its subclasses to pass their Class reference on HBaseKerberosUtils.setSSLConfiguration | Major | . |
+| [HBASE-23809](https://issues.apache.org/jira/browse/HBASE-23809) | The RSGroup shell test is missing | Major | rsgroup, test |
+| [HBASE-17115](https://issues.apache.org/jira/browse/HBASE-17115) | HMaster/HRegion Info Server does not honour admin.acl | Major | . |
+| [HBASE-23737](https://issues.apache.org/jira/browse/HBASE-23737) | [Flakey Tests] TestFavoredNodeTableImport fails 30% of the time | Major | . |
+| [HBASE-23733](https://issues.apache.org/jira/browse/HBASE-23733) | [Flakey Tests] TestSplitTransactionOnCluster | Major | flakies |
+| [HBASE-23701](https://issues.apache.org/jira/browse/HBASE-23701) | Make sure HBaseClassTestRule doesn't suffer same issue as HBaseClassTestRuleChecker | Minor | . |
+| [HBASE-23695](https://issues.apache.org/jira/browse/HBASE-23695) | Fail more gracefully when test class is missing Category | Minor | . |
+| [HBASE-23677](https://issues.apache.org/jira/browse/HBASE-23677) | region.jsp returns 500/NPE when provided encoded region name is not online | Minor | regionserver, UI |
+| [HBASE-23679](https://issues.apache.org/jira/browse/HBASE-23679) | FileSystem instance leaks due to bulk loads with Kerberos enabled | Critical | . |
+| [HBASE-21345](https://issues.apache.org/jira/browse/HBASE-21345) | [hbck2] Allow version check to proceed even though master is 'initializing'. | Major | hbck2 |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23808](https://issues.apache.org/jira/browse/HBASE-23808) | [Flakey Test] TestMasterShutdown#testMasterShutdownBeforeStartingAnyRegionServer | Major | test |
+| [HBASE-23793](https://issues.apache.org/jira/browse/HBASE-23793) | Increase maven heap allocation to 4G in Yetus personality | Major | build, test |
+| [HBASE-23792](https://issues.apache.org/jira/browse/HBASE-23792) | [Flakey Test] TestExportSnapshotNoCluster.testSnapshotWithRefsExportFileSystemState | Major | test |
+| [HBASE-23749](https://issues.apache.org/jira/browse/HBASE-23749) | TestHFileWriterV3 should have tests for all data block encodings | Major | . |
+| [HBASE-23711](https://issues.apache.org/jira/browse/HBASE-23711) | Add test for MinVersions and KeepDeletedCells TTL | Minor | . |
+| [HBASE-23569](https://issues.apache.org/jira/browse/HBASE-23569) | Validate that the log cleaner actually cleans oldWALs as expected | Major | integration tests, master, test |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23755](https://issues.apache.org/jira/browse/HBASE-23755) | [OpenTracing] Declare HTrace is unusable in the user doc | Major | . |
+| [HBASE-23748](https://issues.apache.org/jira/browse/HBASE-23748) | Include HBASE-21284 to branch-2.2 | Major | . |
+| [HBASE-23773](https://issues.apache.org/jira/browse/HBASE-23773) | Backport "HBASE-23601 OutputSink.WriterThread exception gets stuck and repeated indefinietly" to branch-2.2 | Major | . |
+| [HBASE-23728](https://issues.apache.org/jira/browse/HBASE-23728) | Include HBASE-21018 in 2.2 & 2.3 | Major | . |
+| [HBASE-23727](https://issues.apache.org/jira/browse/HBASE-23727) | Port HBASE-20981 in 2.2 & 2.3 | Major | . |
+| [HBASE-23692](https://issues.apache.org/jira/browse/HBASE-23692) | Set version as 2.2.4-SNAPSHOT in branch-2.2 | Major | . |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23874](https://issues.apache.org/jira/browse/HBASE-23874) | Move Jira-attached file precommit definition from script in Jenkins config to dev-support | Minor | build |
+| [HBASE-23854](https://issues.apache.org/jira/browse/HBASE-23854) | Documentation update of external\_apis.adoc#example-scala-code | Trivial | documentation |
+| [HBASE-23774](https://issues.apache.org/jira/browse/HBASE-23774) | Announce user-zh list | Trivial | website |
+| [HBASE-23734](https://issues.apache.org/jira/browse/HBASE-23734) | Backport [HBASE-21874 Bucket cache on Persistent memory] to branch-2.2 | Major | . |
+
+
+
+## Release 2.2.3 - Unreleased (as of 2020-01-10)
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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 |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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-23645](https://issues.apache.org/jira/browse/HBASE-23645) | Fix remaining Checkstyle violations in tests of hbase-common | Minor | . |
+| [HBASE-23635](https://issues.apache.org/jira/browse/HBASE-23635) | Reduce number of Checkstyle violations in hbase-mapreduce | Minor | mapreduce |
+| [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-23623](https://issues.apache.org/jira/browse/HBASE-23623) | Reduce number of Checkstyle violations in hbase-rest | Minor | REST |
+| [HBASE-23627](https://issues.apache.org/jira/browse/HBASE-23627) | Resolve remaining Checkstyle violations in hbase-thrift | Minor | Thrift |
+| [HBASE-23615](https://issues.apache.org/jira/browse/HBASE-23615) | Use a dedicated thread for executing WorkerMonitor in ProcedureExecutor. | Major | amv2 |
+| [HBASE-23626](https://issues.apache.org/jira/browse/HBASE-23626) | Reduce number of Checkstyle violations in tests of hbase-common | Minor | . |
+| [HBASE-23622](https://issues.apache.org/jira/browse/HBASE-23622) | Reduce number of Checkstyle violations in hbase-common | Minor | . |
+| [HBASE-23621](https://issues.apache.org/jira/browse/HBASE-23621) | Reduce number of Checkstyle violations in tests of hbase-common | Minor | . |
+| [HBASE-23619](https://issues.apache.org/jira/browse/HBASE-23619) | Use built-in formatting for logging in hbase-zookeeper | Trivial | Zookeeper |
+| [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-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-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-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-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-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-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-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-23082](https://issues.apache.org/jira/browse/HBASE-23082) | Backport low-latency snapshot tracking for space quotas to 2.x | Major | Quotas |
+| [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-23207](https://issues.apache.org/jira/browse/HBASE-23207) | Log a region open journal | Minor | . |
+| [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-23038](https://issues.apache.org/jira/browse/HBASE-23038) | Provide consistent and clear logging about disabling chores | Minor | master, regionserver |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23658](https://issues.apache.org/jira/browse/HBASE-23658) | Fix flaky TestSnapshotFromMaster | Major | . |
+| [HBASE-23659](https://issues.apache.org/jira/browse/HBASE-23659) | BaseLoadBalancer#wouldLowerAvailability should consider region replicas | Major | . |
+| [HBASE-23655](https://issues.apache.org/jira/browse/HBASE-23655) | Fix flaky TestRSGroupsKillRS: should wait the SCP to finish | Major | . |
+| [HBASE-23663](https://issues.apache.org/jira/browse/HBASE-23663) | Allow dot and hyphen in Profiler's URL | Minor | profiler |
+| [HBASE-23666](https://issues.apache.org/jira/browse/HBASE-23666) | Backport "HBASE-23660 hbase:meta's table.jsp ref to wrong rs address" to branch-2 | Major | master |
+| [HBASE-23636](https://issues.apache.org/jira/browse/HBASE-23636) | Disable table may hang when regionserver stop or abort. | Major | amv2 |
+| [HBASE-23175](https://issues.apache.org/jira/browse/HBASE-23175) | Yarn unable to acquire delegation token for HBase Spark jobs | Major | security, spark |
+| [HBASE-23553](https://issues.apache.org/jira/browse/HBASE-23553) | Snapshot referenced data files are deleted in some case | Major | . |
+| [HBASE-23587](https://issues.apache.org/jira/browse/HBASE-23587) | The FSYNC\_WAL flag does not work on branch-2.x | Major | wal |
+| [HBASE-23596](https://issues.apache.org/jira/browse/HBASE-23596) | HBCKServerCrashProcedure can double assign | Major | proc-v2 |
+| [HBASE-23589](https://issues.apache.org/jira/browse/HBASE-23589) | FlushDescriptor contains non-matching family/output combinations | Critical | read replicas |
+| [HBASE-23581](https://issues.apache.org/jira/browse/HBASE-23581) | Creating table gets stuck when specifying an invalid split policy as METADATA | Major | . |
+| [HBASE-23572](https://issues.apache.org/jira/browse/HBASE-23572) | In 'HBCK Report', distinguish between live, dead, and unknown servers | Trivial | . |
+| [HBASE-23564](https://issues.apache.org/jira/browse/HBASE-23564) | RegionStates may has some expired serverinfo and make regions do not balance. | Major | . |
+| [HBASE-23594](https://issues.apache.org/jira/browse/HBASE-23594) | Procedure stuck due to region happen to recorded on two servers. | Critical | amv2, Region Assignment |
+| [HBASE-23376](https://issues.apache.org/jira/browse/HBASE-23376) | NPE happens while replica region is moving | Minor | read replicas |
+| [HBASE-23582](https://issues.apache.org/jira/browse/HBASE-23582) | Unbalanced braces in string representation of table descriptor | Minor | . |
+| [HBASE-23566](https://issues.apache.org/jira/browse/HBASE-23566) | Fix package/packet terminology problem in chaos monkeys | Minor | integration tests |
+| [HBASE-23360](https://issues.apache.org/jira/browse/HBASE-23360) | [CLI] Fix help command "set\_quota" to explain removing quota | Minor | shell |
+| [HBASE-23554](https://issues.apache.org/jira/browse/HBASE-23554) | Encoded regionname to regionname utility | Major | shell |
+| [HBASE-22096](https://issues.apache.org/jira/browse/HBASE-22096) | /storeFile.jsp shows CorruptHFileException when the storeFile is a reference file | Major | UI |
+| [HBASE-22529](https://issues.apache.org/jira/browse/HBASE-22529) | Sanity check for in-memory compaction policy | Minor | . |
+| [HBASE-23337](https://issues.apache.org/jira/browse/HBASE-23337) | Several modules missing in nexus for Apache HBase 2.2.2 | Blocker | build, community, scripts |
+| [HBASE-23345](https://issues.apache.org/jira/browse/HBASE-23345) | Table need to replication unless all of cfs are excluded | Minor | Replication |
+| [HBASE-23356](https://issues.apache.org/jira/browse/HBASE-23356) | When construct StoreScanner throw exceptions it is possible to left some KeyValueScanner not closed. | Major | . |
+| [HBASE-23117](https://issues.apache.org/jira/browse/HBASE-23117) | Bad enum in hbase:meta info:state column can fail loadMeta and stop startup | Minor | . |
+| [HBASE-23312](https://issues.apache.org/jira/browse/HBASE-23312) | HBase Thrift SPNEGO configs (HBASE-19852) should be backwards compatible | Major | Thrift |
+| [HBASE-23197](https://issues.apache.org/jira/browse/HBASE-23197) | "IllegalArgumentException: Wrong FS" on edits replay when WALs on different file system and hbase.region.archive.recovered.edits is enabled. | Major | . |
+| [HBASE-23336](https://issues.apache.org/jira/browse/HBASE-23336) | [CLI] Incorrect row(s) count "clear\_deadservers" | Minor | shell |
+| [HBASE-23237](https://issues.apache.org/jira/browse/HBASE-23237) | Negative 'Requests per Second' counts in UI | Major | UI |
+| [HBASE-23328](https://issues.apache.org/jira/browse/HBASE-23328) | info:regioninfo goes wrong when region replicas enabled | Major | read replicas |
+| [HBASE-22607](https://issues.apache.org/jira/browse/HBASE-22607) | TestExportSnapshotNoCluster::testSnapshotWithRefsExportFileSystemState() fails intermittently | Major | test |
+| [HBASE-23318](https://issues.apache.org/jira/browse/HBASE-23318) | LoadTestTool doesn't start | Minor | . |
+| [HBASE-23282](https://issues.apache.org/jira/browse/HBASE-23282) | HBCKServerCrashProcedure for 'Unknown Servers' | Major | hbck2, proc-v2 |
+| [HBASE-23294](https://issues.apache.org/jira/browse/HBASE-23294) | ReplicationBarrierCleaner should delete all the barriers for a removed region which does not belong to any serial replication peer | Major | master, Replication |
+| [HBASE-23290](https://issues.apache.org/jira/browse/HBASE-23290) | shell processlist command is broken | Major | shell |
+| [HBASE-18439](https://issues.apache.org/jira/browse/HBASE-18439) | Subclasses of o.a.h.h.chaos.actions.Action all use the same logger | Minor | integration tests |
+| [HBASE-23262](https://issues.apache.org/jira/browse/HBASE-23262) | Cannot load Master UI | Major | master, UI |
+| [HBASE-23263](https://issues.apache.org/jira/browse/HBASE-23263) | NPE in Quotas.jsp | Major | UI |
+| [HBASE-22980](https://issues.apache.org/jira/browse/HBASE-22980) | HRegionPartioner getPartition() method incorrectly partitions the regions of the table. | Major | mapreduce |
+| [HBASE-21458](https://issues.apache.org/jira/browse/HBASE-21458) | Error: Could not find or load main class org.apache.hadoop.hbase.util.GetJavaProperty | Minor | build, Client |
+| [HBASE-23243](https://issues.apache.org/jira/browse/HBASE-23243) | [pv2] Filter out SUCCESS procedures; on decent-sized cluster, plethora overwhelms problems | Major | proc-v2, UI |
+| [HBASE-23247](https://issues.apache.org/jira/browse/HBASE-23247) | [hbck2] Schedule SCPs for 'Unknown Servers' | Major | hbck2 |
+| [HBASE-23241](https://issues.apache.org/jira/browse/HBASE-23241) | TestExecutorService sometimes fail | Major | test |
+| [HBASE-23244](https://issues.apache.org/jira/browse/HBASE-23244) | NPEs running Canary | Major | canary |
+| [HBASE-23231](https://issues.apache.org/jira/browse/HBASE-23231) | ReplicationSource do not update metrics after refresh | Major | wal |
+| [HBASE-22739](https://issues.apache.org/jira/browse/HBASE-22739) | ArrayIndexOutOfBoundsException when balance | Major | Balancer |
+| [HBASE-23192](https://issues.apache.org/jira/browse/HBASE-23192) | CatalogJanitor consistencyCheck does not log problematic row on exception | Minor | hbck2 |
+| [HBASE-20827](https://issues.apache.org/jira/browse/HBASE-20827) | Add pause when retrying after CallQueueTooBigException for reportRegionStateTransition | Major | Region Assignment |
+| [HBASE-23187](https://issues.apache.org/jira/browse/HBASE-23187) | Update parent region state to SPLIT in meta | Major | master |
+| [HBASE-23199](https://issues.apache.org/jira/browse/HBASE-23199) | Error populating Table-Attribute fields | Major | master, UI |
+| [HBASE-23222](https://issues.apache.org/jira/browse/HBASE-23222) | Better logging and mitigation for MOB compaction failures | Critical | mob |
+| [HBASE-23181](https://issues.apache.org/jira/browse/HBASE-23181) | Blocked WAL archive: "LogRoller: Failed to schedule flush of XXXX, because it is not online on us" | Major | regionserver, wal |
+| [HBASE-23193](https://issues.apache.org/jira/browse/HBASE-23193) | ConnectionImplementation.isTableAvailable can not deal with meta table on branch-2.x | Major | rsgroup, test |
+| [HBASE-23177](https://issues.apache.org/jira/browse/HBASE-23177) | If fail to open reference because FNFE, make it plain it is a Reference | Major | Operability |
+| [HBASE-23042](https://issues.apache.org/jira/browse/HBASE-23042) | Parameters are incorrect in procedures jsp | Major | . |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23320](https://issues.apache.org/jira/browse/HBASE-23320) | Upgrade surefire plugin to 3.0.0-M4 | Major | dependencies, test |
+| [HBASE-20461](https://issues.apache.org/jira/browse/HBASE-20461) | Implement fsync for AsyncFSWAL | Major | wal |
+| [HBASE-23085](https://issues.apache.org/jira/browse/HBASE-23085) | Network and Data related Actions | Minor | integration tests |
+| [HBASE-23307](https://issues.apache.org/jira/browse/HBASE-23307) | Add running of ReplicationBarrierCleaner to hbck2 fixMeta invocation | Major | hbck2 |
+| [HBASE-23322](https://issues.apache.org/jira/browse/HBASE-23322) | [hbck2] Simplification on HBCKSCP scheduling | Minor | hbck2 |
+| [HBASE-22480](https://issues.apache.org/jira/browse/HBASE-22480) | Get block from BlockCache once and return this block to BlockCache twice make ref count error. | Major | . |
+| [HBASE-23136](https://issues.apache.org/jira/browse/HBASE-23136) | PartionedMobFileCompactor bulkloaded files shouldn't get replicated (addressing buklload replication related issue raised in HBASE-22380) | Critical | . |
+| [HBASE-23217](https://issues.apache.org/jira/browse/HBASE-23217) | Set version as 2.2.3-SNAPSHOT in branch-2.2 | Major | . |
+| [HBASE-22982](https://issues.apache.org/jira/browse/HBASE-22982) | Send SIGSTOP to hang or SIGCONT to resume rs and add graceful rolling restart | Minor | integration tests |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23642](https://issues.apache.org/jira/browse/HBASE-23642) | Reintroduce ReplicationUtils.contains as deprecated | Major | Replication |
+| [HBASE-23575](https://issues.apache.org/jira/browse/HBASE-23575) | Remove dead code from AsyncRegistry interface | Minor | Client |
+| [HBASE-23236](https://issues.apache.org/jira/browse/HBASE-23236) | Upgrade to yetus 0.11.1 | Major | build |
+| [HBASE-23250](https://issues.apache.org/jira/browse/HBASE-23250) | Log message about CleanerChore delegate initialization should be at INFO | Minor | master, Operability |
+| [HBASE-23227](https://issues.apache.org/jira/browse/HBASE-23227) | Upgrade jackson-databind to 2.9.10.1 to avoid recent CVEs | Blocker | dependencies, REST, security |
+
+
+
+## Release 2.2.2 - Unreleased (as of 2019-10-16)
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-11062](https://issues.apache.org/jira/browse/HBASE-11062) | hbtop | Major | hbtop |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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-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-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-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 | . |
+| [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-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-22701](https://issues.apache.org/jira/browse/HBASE-22701) | Better handle invalid local directory for DynamicClassLoader | Major | regionserver |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-22370](https://issues.apache.org/jira/browse/HBASE-22370) | ByteBuf LEAK ERROR | Major | rpc, wal |
+| [HBASE-23078](https://issues.apache.org/jira/browse/HBASE-23078) | BaseLoadBalancer should consider region replicas when randomAssignment and roundRobinAssignment | Major | . |
+| [HBASE-23155](https://issues.apache.org/jira/browse/HBASE-23155) | May NPE when concurrent AsyncNonMetaRegionLocator#updateCachedLocationOnError | Major | asyncclient |
+| [HBASE-21540](https://issues.apache.org/jira/browse/HBASE-21540) | when set property "hbase.systemtables.compacting.memstore.type" to "basic" or "eager" will cause an exception | Major | conf |
+| [HBASE-23153](https://issues.apache.org/jira/browse/HBASE-23153) | PrimaryRegionCountSkewCostFunction SLB function should implement CostFunction#isNeeded | Major | . |
+| [HBASE-23154](https://issues.apache.org/jira/browse/HBASE-23154) | list\_deadservers return incorrect no of rows | Minor | shell |
+| [HBASE-23152](https://issues.apache.org/jira/browse/HBASE-23152) | Compaction\_switch does not work by RegionServer name | Major | Client, Compaction |
+| [HBASE-23115](https://issues.apache.org/jira/browse/HBASE-23115) | Unit change for StoreFileSize and MemStoreSize | Minor | metrics, UI |
+| [HBASE-23138](https://issues.apache.org/jira/browse/HBASE-23138) | Drop\_all table by regex fail from Shell - Similar to HBASE-23134 | Major | shell |
+| [HBASE-23139](https://issues.apache.org/jira/browse/HBASE-23139) | MapReduce jobs lauched from convenience distribution are nonfunctional | Blocker | mapreduce |
+| [HBASE-22767](https://issues.apache.org/jira/browse/HBASE-22767) | System table RIT STUCK if their RSGroup has no highest version RSes | Major | rsgroup |
+| [HBASE-23134](https://issues.apache.org/jira/browse/HBASE-23134) | Enable\_all and Disable\_all table by Regex fail from Shell | Major | shell |
+| [HBASE-22903](https://issues.apache.org/jira/browse/HBASE-22903) | alter\_status command is broken | Major | metrics, shell |
+| [HBASE-23094](https://issues.apache.org/jira/browse/HBASE-23094) | Wrong log message in simpleRegionNormaliser while checking if merge is enabled. | Minor | . |
+| [HBASE-23125](https://issues.apache.org/jira/browse/HBASE-23125) | TestRSGroupsAdmin2 is flaky | Major | test |
+| [HBASE-23119](https://issues.apache.org/jira/browse/HBASE-23119) | ArrayIndexOutOfBoundsException in PrivateCellUtil#qualifierStartsWith | Major | . |
+| [HBASE-23054](https://issues.apache.org/jira/browse/HBASE-23054) | Remove synchronization block from MetaTableMetrics and fix LossyCounting algorithm | Major | metrics |
+| [HBASE-22380](https://issues.apache.org/jira/browse/HBASE-22380) | break circle replication when doing bulkload | Critical | Replication |
+| [HBASE-23079](https://issues.apache.org/jira/browse/HBASE-23079) | RegionRemoteProcedureBase should override setTimeoutFailure | Blocker | amv2 |
+| [HBASE-22965](https://issues.apache.org/jira/browse/HBASE-22965) | RS Crash due to DBE reference to an reused ByteBuff | Major | . |
+| [HBASE-22012](https://issues.apache.org/jira/browse/HBASE-22012) | SpaceQuota DisableTableViolationPolicy will cause cycles of enable/disable table | Major | . |
+| [HBASE-22944](https://issues.apache.org/jira/browse/HBASE-22944) | TableNotFoundException: hbase:quota is thrown when region server is restarted. | Minor | Quotas |
+| [HBASE-22142](https://issues.apache.org/jira/browse/HBASE-22142) | Space quota: If table inside namespace having space quota is dropped, data size usage is still considered for the drop table. | Minor | . |
+| [HBASE-22649](https://issues.apache.org/jira/browse/HBASE-22649) | Encode StoreFile path URLs in the UI to handle scenarios where CF contains special characters (like # etc.) | Major | UI |
+| [HBASE-23051](https://issues.apache.org/jira/browse/HBASE-23051) | Remove unneeded Mockito.mock invocations | Major | test |
+| [HBASE-23005](https://issues.apache.org/jira/browse/HBASE-23005) | Table UI showed exception message when table is disabled | Minor | . |
+| [HBASE-23040](https://issues.apache.org/jira/browse/HBASE-23040) | region mover gives NullPointerException instead of saying a host isn't in the cluster | Minor | . |
+| [HBASE-23043](https://issues.apache.org/jira/browse/HBASE-23043) | TestWALEntryStream times out | Major | wal |
+| [HBASE-22955](https://issues.apache.org/jira/browse/HBASE-22955) | Branches-1 precommit and nightly yetus jobs are using jdk8 for jdk7 jobs | Major | . |
+| [HBASE-22929](https://issues.apache.org/jira/browse/HBASE-22929) | MemStoreLAB ChunkCreator may memory leak | Major | . |
+| [HBASE-23006](https://issues.apache.org/jira/browse/HBASE-23006) | RSGroupBasedLoadBalancer should also try to place replicas for the same region to different region servers | Major | Region Assignment, rsgroup |
+| [HBASE-23007](https://issues.apache.org/jira/browse/HBASE-23007) | UnsatisfiedLinkError when using hbase-shaded packages under linux | Critical | shading |
+| [HBASE-22013](https://issues.apache.org/jira/browse/HBASE-22013) | SpaceQuotas - getNumRegions() returning wrong number of regions due to region replicas | Major | . |
+| [HBASE-22979](https://issues.apache.org/jira/browse/HBASE-22979) | Call ChunkCreator.initialize in TestHRegionWithInMemoryFlush | Critical | . |
+| [HBASE-22964](https://issues.apache.org/jira/browse/HBASE-22964) | Fix flaky TestClusterRestartFailover and TestClusterRestartFailoverSplitWithoutZk | Major | . |
+| [HBASE-22963](https://issues.apache.org/jira/browse/HBASE-22963) | Netty ByteBuf leak in rpc client implementation | Major | rpc |
+| [HBASE-22981](https://issues.apache.org/jira/browse/HBASE-22981) | Remove unused flags for Yetus | Critical | build |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-23168](https://issues.apache.org/jira/browse/HBASE-23168) | Generate CHANGES.md and RELEASENOTES.md for 2.2.2 | Major | documentation |
+| [HBASE-23167](https://issues.apache.org/jira/browse/HBASE-23167) | Set version as 2.2.2 in branch-2.2 in prep for first RC of 2.2.2 | Major | build |
+| [HBASE-23163](https://issues.apache.org/jira/browse/HBASE-23163) | Refactor HStore.getStorefilesSize related methods | Major | regionserver |
+| [HBASE-22927](https://issues.apache.org/jira/browse/HBASE-22927) | Upgrade mockito version for Java 11 compatibility | Major | . |
+| [HBASE-23027](https://issues.apache.org/jira/browse/HBASE-23027) | Set version to 2.2.2-SNAPSHOT in branch-2.2 | Major | . |
+| [HBASE-22796](https://issues.apache.org/jira/browse/HBASE-22796) | [HBCK2] Add fix of overlaps to fixMeta hbck Service | Major | . |
+| [HBASE-22993](https://issues.apache.org/jira/browse/HBASE-22993) | HBCK report UI showed -1 if hbck chore not running | Minor | . |
+| [HBASE-23014](https://issues.apache.org/jira/browse/HBASE-23014) | Should not show split parent regions in hbck report UI | Major | . |
+| [HBASE-22859](https://issues.apache.org/jira/browse/HBASE-22859) | [HBCK2] Fix the orphan regions on filesystem | Major | documentation, hbck2 |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-21745](https://issues.apache.org/jira/browse/HBASE-21745) | Make HBCK2 be able to fix issues other than region assignment | Critical | hbase-operator-tools, hbck2 |
+| [HBASE-23053](https://issues.apache.org/jira/browse/HBASE-23053) | Disable concurrent nightly builds | Minor | build |
+| [HBASE-23023](https://issues.apache.org/jira/browse/HBASE-23023) | upgrade shellcheck used to test in nightly and precommit | Major | build |
+
+
+
+## Release 2.2.1 - Unreleased (as of 2019-09-04)
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-22690](https://issues.apache.org/jira/browse/HBASE-22690) | Deprecate / Remove OfflineMetaRepair in hbase-2+ | Major | hbck2 |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-15666](https://issues.apache.org/jira/browse/HBASE-15666) | shaded dependencies for hbase-testing-util | Critical | test |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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-22872](https://issues.apache.org/jira/browse/HBASE-22872) | Don't create normalization plan unnecesarily when split and merge both are disabled | Minor | . |
+| [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-21996](https://issues.apache.org/jira/browse/HBASE-21996) | Set locale for javadoc | Major | documentation |
+| [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-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-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-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-22363](https://issues.apache.org/jira/browse/HBASE-22363) | Remove hardcoded number of read cache block buckets | Trivial | BlockCache, BucketCache |
+| [HBASE-22764](https://issues.apache.org/jira/browse/HBASE-22764) | Fix remaining Checkstyle issues in hbase-rsgroup | Trivial | rsgroup |
+| [HBASE-22763](https://issues.apache.org/jira/browse/HBASE-22763) | Fix remaining Checkstyle issue in hbase-procedure | Trivial | . |
+| [HBASE-22743](https://issues.apache.org/jira/browse/HBASE-22743) | ClientUtils for hbase-examples | Minor | . |
+| [HBASE-22750](https://issues.apache.org/jira/browse/HBASE-22750) | Correct @throws in comment | Trivial | Client, rpc |
+| [HBASE-22702](https://issues.apache.org/jira/browse/HBASE-22702) | [Log] 'Group not found for table' is chatty | Trivial | . |
+| [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-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-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-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-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 |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-22970](https://issues.apache.org/jira/browse/HBASE-22970) | split parents show as overlaps in the HBCK Report | Major | . |
+| [HBASE-22961](https://issues.apache.org/jira/browse/HBASE-22961) | Deprecate hbck1 in core | Major | hbck |
+| [HBASE-22896](https://issues.apache.org/jira/browse/HBASE-22896) | TestHRegion.testFlushMarkersWALFail is flaky | Minor | . |
+| [HBASE-22943](https://issues.apache.org/jira/browse/HBASE-22943) | Various procedures should not cache log trace level | Minor | proc-v2 |
+| [HBASE-22881](https://issues.apache.org/jira/browse/HBASE-22881) | Fix non-daemon threads in hbase server implementation | Major | master |
+| [HBASE-22893](https://issues.apache.org/jira/browse/HBASE-22893) | Change the comment in HBaseClassTestRule to reflect change in default test timeouts | Trivial | . |
+| [HBASE-22928](https://issues.apache.org/jira/browse/HBASE-22928) | ScanMetrics counter update may not happen in case of exception in TableRecordReaderImpl | Minor | mapreduce |
+| [HBASE-22941](https://issues.apache.org/jira/browse/HBASE-22941) | MetaTableAccessor.getMergeRegions() returns parent regions in random order | Major | . |
+| [HBASE-22935](https://issues.apache.org/jira/browse/HBASE-22935) | TaskMonitor warns MonitoredRPCHandler task may be stuck when it recently started | Minor | logging |
+| [HBASE-22857](https://issues.apache.org/jira/browse/HBASE-22857) | Fix the failed ut TestHRegion and TestHRegionWithInMemoryFlush | Major | . |
+| [HBASE-22922](https://issues.apache.org/jira/browse/HBASE-22922) | Only the two first regions are locked in MergeTableRegionsProcedure | Major | . |
+| [HBASE-22852](https://issues.apache.org/jira/browse/HBASE-22852) | hbase nightlies leaking gpg-agents | Minor | build |
+| [HBASE-22867](https://issues.apache.org/jira/browse/HBASE-22867) | The ForkJoinPool in CleanerChore will spawn thousands of threads in our cluster with thousands table | Critical | master |
+| [HBASE-22904](https://issues.apache.org/jira/browse/HBASE-22904) | NPE occurs when RS send space quota usage report during HMaster init | Minor | . |
+| [HBASE-22806](https://issues.apache.org/jira/browse/HBASE-22806) | Deleted CF are not cleared if memstore contain entries | Major | API |
+| [HBASE-22601](https://issues.apache.org/jira/browse/HBASE-22601) | Misconfigured addition of peers leads to cluster shutdown. | Major | . |
+| [HBASE-22863](https://issues.apache.org/jira/browse/HBASE-22863) | Avoid Jackson versions and dependencies with known CVEs | Major | dependencies |
+| [HBASE-22879](https://issues.apache.org/jira/browse/HBASE-22879) | user\_permission command failed to show global permission | Major | . |
+| [HBASE-22882](https://issues.apache.org/jira/browse/HBASE-22882) | TestFlushSnapshotFromClient#testConcurrentSnapshottingAttempts is flakey (was written flakey) | Major | test |
+| [HBASE-22870](https://issues.apache.org/jira/browse/HBASE-22870) | reflection fails to access a private nested class | Major | master |
+| [HBASE-22860](https://issues.apache.org/jira/browse/HBASE-22860) | Master's webui returns NPE/HTTP 500 under maintenance mode | Major | master, UI |
+| [HBASE-22856](https://issues.apache.org/jira/browse/HBASE-22856) | HBASE-Find-Flaky-Tests fails with pip error | Major | build, test |
+| [HBASE-22632](https://issues.apache.org/jira/browse/HBASE-22632) | SplitTableRegionProcedure and MergeTableRegionsProcedure should skip store files for unknown column families | Major | proc-v2 |
+| [HBASE-22838](https://issues.apache.org/jira/browse/HBASE-22838) | assembly:single failure: user id or group id 'xxxxx' is too big | Major | build |
+| [HBASE-22417](https://issues.apache.org/jira/browse/HBASE-22417) | DeleteTableProcedure.deleteFromMeta method should remove table from Master's table descriptors cache | Major | . |
+| [HBASE-22539](https://issues.apache.org/jira/browse/HBASE-22539) | WAL corruption due to early DBBs re-use when Durability.ASYNC\_WAL is used | Blocker | rpc, wal |
+| [HBASE-22801](https://issues.apache.org/jira/browse/HBASE-22801) | Maven build issue on Github PRs | Major | build |
+| [HBASE-22793](https://issues.apache.org/jira/browse/HBASE-22793) | RPC server connection is logging user as NULL principal | Minor | rpc |
+| [HBASE-22778](https://issues.apache.org/jira/browse/HBASE-22778) | Upgrade jasckson databind to 2.9.9.2 | Blocker | dependencies |
+| [HBASE-22773](https://issues.apache.org/jira/browse/HBASE-22773) | when set blockSize option in Performance Evaluation tool, error occurs:ERROR: Unrecognized option/command: --blockSize=131072 | Minor | mapreduce |
+| [HBASE-22735](https://issues.apache.org/jira/browse/HBASE-22735) | list\_regions may throw an error if a region is RIT | Minor | shell |
+| [HBASE-22145](https://issues.apache.org/jira/browse/HBASE-22145) | windows hbase-env causes hbase cli/etc to ignore HBASE\_OPTS | Major | . |
+| [HBASE-22408](https://issues.apache.org/jira/browse/HBASE-22408) | add a metric for regions OPEN on non-live servers | Major | . |
+| [HBASE-22758](https://issues.apache.org/jira/browse/HBASE-22758) | Remove the unneccesary info cf deletion in DeleteTableProcedure#deleteFromMeta | Major | . |
+| [HBASE-22751](https://issues.apache.org/jira/browse/HBASE-22751) | table.jsp fails if ugly regions in table | Major | UI |
+| [HBASE-22733](https://issues.apache.org/jira/browse/HBASE-22733) | TestSplitTransactionOnCluster.testMasterRestartAtRegionSplitPendingCatalogJanitor is flakey | Major | . |
+| [HBASE-22715](https://issues.apache.org/jira/browse/HBASE-22715) | All scan requests should be handled by scan handler threads in RWQueueRpcExecutor | Minor | . |
+| [HBASE-22722](https://issues.apache.org/jira/browse/HBASE-22722) | Upgrade jackson databind dependencies to 2.9.9.1 | Blocker | dependencies |
+| [HBASE-22603](https://issues.apache.org/jira/browse/HBASE-22603) | Javadoc Warnings related to @link tag | Trivial | documentation |
+| [HBASE-22720](https://issues.apache.org/jira/browse/HBASE-22720) | Incorrect link for hbase.unittests | Trivial | documentation |
+| [HBASE-21426](https://issues.apache.org/jira/browse/HBASE-21426) | TestEncryptionKeyRotation.testCFKeyRotation is flaky | Major | . |
+| [HBASE-20368](https://issues.apache.org/jira/browse/HBASE-20368) | Fix RIT stuck when a rsgroup has no online servers but AM's pendingAssginQueue is cleared | Major | rsgroup |
+| [HBASE-22700](https://issues.apache.org/jira/browse/HBASE-22700) | Incorrect timeout in recommended ZooKeeper configuration | Minor | documentation |
+| [HBASE-22661](https://issues.apache.org/jira/browse/HBASE-22661) | list\_regions command in hbase shell is broken | Major | shell |
+| [HBASE-22684](https://issues.apache.org/jira/browse/HBASE-22684) | The log rolling request maybe canceled immediately in LogRoller due to a race | Major | wal |
+| [HBASE-22586](https://issues.apache.org/jira/browse/HBASE-22586) | Javadoc Warnings related to @param tag | Trivial | documentation |
+| [HBASE-22571](https://issues.apache.org/jira/browse/HBASE-22571) | Javadoc Warnings related to @return tag | Trivial | documentation |
+| [HBASE-22681](https://issues.apache.org/jira/browse/HBASE-22681) | The 'assert highestUnsyncedTxid \< entry.getTxid();' in AbstractFWAL.append may fail when using AsyncFSWAL | Critical | wal |
+| [HBASE-22686](https://issues.apache.org/jira/browse/HBASE-22686) | ZkSplitLogWorkerCoordination doesn't allow a regionserver to pick up all of the split work it is capable of | Major | . |
+| [HBASE-22656](https://issues.apache.org/jira/browse/HBASE-22656) | [Metrics] Tabe metrics 'BatchPut' and 'BatchDelete' are never updated | Minor | metrics |
+| [HBASE-22582](https://issues.apache.org/jira/browse/HBASE-22582) | The Compaction writer may access the lastCell whose memory has been released when appending fileInfo in the final | Major | Compaction |
+| [HBASE-22652](https://issues.apache.org/jira/browse/HBASE-22652) | Flakey TestLockManager; test timed out after 780 seconds | Major | proc-v2 |
+| [HBASE-22637](https://issues.apache.org/jira/browse/HBASE-22637) | fix flaky TestMetaTableMetrics test | Major | metrics, test |
+| [HBASE-13798](https://issues.apache.org/jira/browse/HBASE-13798) | TestFromClientSide\* don't close the Table | Trivial | test |
+| [HBASE-21751](https://issues.apache.org/jira/browse/HBASE-21751) | WAL creation fails during region open may cause region assign forever fail | Major | . |
+| [HBASE-22477](https://issues.apache.org/jira/browse/HBASE-22477) | Throwing exception when meta region is not in OPEN state in client registry may crash a master | Major | Client, master, meta |
+| [HBASE-22169](https://issues.apache.org/jira/browse/HBASE-22169) | Open region failed cause memory leak | Critical | . |
+| [HBASE-22617](https://issues.apache.org/jira/browse/HBASE-22617) | Recovered WAL directories not getting cleaned up | Blocker | wal |
+| [HBASE-22605](https://issues.apache.org/jira/browse/HBASE-22605) | Ref guide includes dev guidance only applicable to EOM versions | Trivial | documentation |
+| [HBASE-22565](https://issues.apache.org/jira/browse/HBASE-22565) | Javadoc Warnings: @see cannot be used in inline documentation | Trivial | documentation |
+| [HBASE-22562](https://issues.apache.org/jira/browse/HBASE-22562) | PressureAwareThroughputController#skipControl never invoked | Trivial | Operability |
+| [HBASE-22559](https://issues.apache.org/jira/browse/HBASE-22559) | [RPC] set guard against CALL\_QUEUE\_HANDLER\_FACTOR\_CONF\_KEY | Minor | rpc |
+| [HBASE-22530](https://issues.apache.org/jira/browse/HBASE-22530) | The metrics of store files count of region are returned to clients incorrectly | Minor | metrics, regionserver |
+| [HBASE-22458](https://issues.apache.org/jira/browse/HBASE-22458) | TestClassFinder fails when run on JDK11 | Minor | java, test |
+| [HBASE-22520](https://issues.apache.org/jira/browse/HBASE-22520) | Avoid possible NPE in HalfStoreFileReader seekBefore() | Major | . |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-22886](https://issues.apache.org/jira/browse/HBASE-22886) | Code Coverage Improvement: Create Unit Tests for ConnectionId | Trivial | test |
+| [HBASE-22766](https://issues.apache.org/jira/browse/HBASE-22766) | Code Coverage Improvement: Create Unit Tests for ResultStatsUtil | Trivial | test |
+| [HBASE-22894](https://issues.apache.org/jira/browse/HBASE-22894) | Move testOpenRegionFailedMemoryLeak to dedicated class | Major | test |
+| [HBASE-22725](https://issues.apache.org/jira/browse/HBASE-22725) | Remove all remaining javadoc warnings | Trivial | test |
+| [HBASE-22615](https://issues.apache.org/jira/browse/HBASE-22615) | Make TestChoreService more robust to timing | Minor | test |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-22851](https://issues.apache.org/jira/browse/HBASE-22851) | Preparing HBase release 2.2.1RC0: set version to 2.2.1 in branch-2.2 | Major | . |
+| [HBASE-22878](https://issues.apache.org/jira/browse/HBASE-22878) | Show table throttle quotas in table jsp | Major | . |
+| [HBASE-22946](https://issues.apache.org/jira/browse/HBASE-22946) | Fix TableNotFound when grant/revoke if AccessController is not loaded | Major | . |
+| [HBASE-22945](https://issues.apache.org/jira/browse/HBASE-22945) | Show quota infos in master UI | Major | master, UI |
+| [HBASE-22858](https://issues.apache.org/jira/browse/HBASE-22858) | Add HBCK Report to master's header.jsp | Minor | master |
+| [HBASE-22891](https://issues.apache.org/jira/browse/HBASE-22891) | Use HBaseQA in HBase-PreCommit-GitHub-PR job | Major | build, scripts |
+| [HBASE-22771](https://issues.apache.org/jira/browse/HBASE-22771) | [HBCK2] fixMeta method and server-side support | Major | hbck2 |
+| [HBASE-22845](https://issues.apache.org/jira/browse/HBASE-22845) | Revert MetaTableAccessor#makePutFromTableState access to public | Blocker | . |
+| [HBASE-22777](https://issues.apache.org/jira/browse/HBASE-22777) | Add a multi-region merge (for fixing overlaps, etc.) | Major | hbck2, proc-v2 |
+| [HBASE-22803](https://issues.apache.org/jira/browse/HBASE-22803) | Modify config value range to enable turning off of the hbck chore | Major | . |
+| [HBASE-22824](https://issues.apache.org/jira/browse/HBASE-22824) | Show filesystem path for the orphans regions on filesystem | Major | . |
+| [HBASE-22808](https://issues.apache.org/jira/browse/HBASE-22808) | HBCK Report showed the offline regions which belong to disabled table | Major | . |
+| [HBASE-22807](https://issues.apache.org/jira/browse/HBASE-22807) | HBCK Report showed wrong orphans regions on FileSystem | Major | . |
+| [HBASE-22737](https://issues.apache.org/jira/browse/HBASE-22737) | Add a new admin method and shell cmd to trigger the hbck chore to run | Major | . |
+| [HBASE-22741](https://issues.apache.org/jira/browse/HBASE-22741) | Show catalogjanitor consistency complaints in new 'HBCK Report' page | Major | hbck2, UI |
+| [HBASE-22723](https://issues.apache.org/jira/browse/HBASE-22723) | Have CatalogJanitor report holes and overlaps; i.e. problems it sees when doing its regular scan of hbase:meta | Major | . |
+| [HBASE-22709](https://issues.apache.org/jira/browse/HBASE-22709) | Add a chore thread in master to do hbck checking and display results in 'HBCK Report' page | Major | . |
+| [HBASE-22742](https://issues.apache.org/jira/browse/HBASE-22742) | [HBCK2] Add more log for hbck operations at master side | Minor | . |
+| [HBASE-22527](https://issues.apache.org/jira/browse/HBASE-22527) | [hbck2] Add a master web ui to show the problematic regions | Major | hbase-operator-tools, hbck2 |
+| [HBASE-22719](https://issues.apache.org/jira/browse/HBASE-22719) | Add debug support for github PR pre commit job | Major | build |
+| [HBASE-22673](https://issues.apache.org/jira/browse/HBASE-22673) | Avoid to expose protobuf stuff in Hbck interface | Major | hbck2 |
+| [HBASE-7191](https://issues.apache.org/jira/browse/HBASE-7191) | HBCK - Add offline create/fix hbase.version and hbase.id | Major | hbck |
+| [HBASE-22600](https://issues.apache.org/jira/browse/HBASE-22600) | Document that LoadIncrementalHFiles will be removed in 3.0.0 | Major | . |
+| [HBASE-22569](https://issues.apache.org/jira/browse/HBASE-22569) | Should treat null consistency as Consistency.STRONG in ConnectionUtils.timelineConsistentRead | Major | . |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-22833](https://issues.apache.org/jira/browse/HBASE-22833) | MultiRowRangeFilter should provide a method for creating a filter which is functionally equivalent to multiple prefix filters | Minor | Client |
+| [HBASE-22895](https://issues.apache.org/jira/browse/HBASE-22895) | Fix the flakey TestSpaceQuotas | Major | Quotas, test |
+| [HBASE-22914](https://issues.apache.org/jira/browse/HBASE-22914) | Backport HBASE-20662 to branch-2.2 | Major | . |
+| [HBASE-22910](https://issues.apache.org/jira/browse/HBASE-22910) | Enable TestMultiVersionConcurrencyControl | Major | test |
+| [HBASE-22913](https://issues.apache.org/jira/browse/HBASE-22913) | Use Hadoop label for nightly builds | Major | build |
+| [HBASE-22911](https://issues.apache.org/jira/browse/HBASE-22911) | fewer concurrent github PR builds | Critical | build |
+| [HBASE-21400](https://issues.apache.org/jira/browse/HBASE-21400) | correct spelling error of 'initilize' in comment | Trivial | documentation |
+| [HBASE-22382](https://issues.apache.org/jira/browse/HBASE-22382) | Refactor tests in TestFromClientSide | Major | test |
+| [HBASE-21606](https://issues.apache.org/jira/browse/HBASE-21606) | Document use of the meta table load metrics added in HBASE-19722 | Critical | documentation, meta, metrics, Operability |
+| [HBASE-19230](https://issues.apache.org/jira/browse/HBASE-19230) | Write up fixVersion policy from dev discussion in refguide | Major | documentation |
+| [HBASE-22566](https://issues.apache.org/jira/browse/HBASE-22566) | Call out default compaction throttling for 2.x in Book | Major | documentation |
+| [HBASE-22560](https://issues.apache.org/jira/browse/HBASE-22560) | Upgrade to Jetty 9.3.latest and Jackson 2.9.latest | Major | dependencies |
+
+
+
+## Release 2.2.0 - Unreleased (as of 2019-06-11)
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-21991](https://issues.apache.org/jira/browse/HBASE-21991) | Fix MetaMetrics issues - [Race condition, Faulty remove logic], few improvements | Major | Coprocessors, metrics |
+| [HBASE-22399](https://issues.apache.org/jira/browse/HBASE-22399) | Change default hadoop-two.version to 2.8.x and remove the 2.7.x hadoop checks | Major | build, hadoop2 |
+| [HBASE-21082](https://issues.apache.org/jira/browse/HBASE-21082) | Reimplement assign/unassign related procedure metrics | Critical | amv2, metrics |
+| [HBASE-20587](https://issues.apache.org/jira/browse/HBASE-20587) | Replace Jackson with shaded thirdparty gson | Major | dependencies |
+| [HBASE-21727](https://issues.apache.org/jira/browse/HBASE-21727) | Simplify documentation around client timeout | Minor | . |
+| [HBASE-21684](https://issues.apache.org/jira/browse/HBASE-21684) | Throw DNRIOE when connection or rpc client is closed | Major | asyncclient, Client |
+| [HBASE-21792](https://issues.apache.org/jira/browse/HBASE-21792) | Mark HTableMultiplexer as deprecated and remove it in 3.0.0 | Major | Client |
+| [HBASE-21657](https://issues.apache.org/jira/browse/HBASE-21657) | PrivateCellUtil#estimatedSerializedSizeOf has been the bottleneck in 100% scan case. | Major | Performance |
+| [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-21492](https://issues.apache.org/jira/browse/HBASE-21492) | CellCodec Written To WAL Before It's Verified | Critical | wal |
+| [HBASE-21452](https://issues.apache.org/jira/browse/HBASE-21452) | Illegal character in hbase counters group name | Major | spark |
+| [HBASE-21158](https://issues.apache.org/jira/browse/HBASE-21158) | Empty qualifier cell should not be returned if it does not match QualifierFilter | Critical | Filters |
+| [HBASE-21223](https://issues.apache.org/jira/browse/HBASE-21223) | [amv2] Remove abort\_procedure from shell | Critical | amv2, hbck2, shell |
+| [HBASE-20881](https://issues.apache.org/jira/browse/HBASE-20881) | Introduce a region transition procedure to handle all the state transition for a region | Major | amv2, proc-v2 |
+| [HBASE-20884](https://issues.apache.org/jira/browse/HBASE-20884) | Replace usage of our Base64 implementation with java.util.Base64 | Major | . |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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-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 |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-22284](https://issues.apache.org/jira/browse/HBASE-22284) | optimization StringBuilder.append of AbstractMemStore.toString | Trivial | . |
[... 669 lines stripped ...]