Apache
/
hbase
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
hbase/CHANGES.md

7089 lines
900 KiB
Markdown
Raw Blame History

This file contains invisible Unicode characters

This file contains invisible Unicode characters that are indistinguishable to humans but may be processed differently by a computer. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

# 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 2.2.0 - 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 | . |
| [HBASE-22523](https://issues.apache.org/jira/browse/HBASE-22523) | Refactor RegionStates#getAssignmentsByTable to make it easy to understand | Major | . |
| [HBASE-22511](https://issues.apache.org/jira/browse/HBASE-22511) | More missing /rs-status links | Minor | UI |
| [HBASE-22496](https://issues.apache.org/jira/browse/HBASE-22496) | UnsafeAccess.unsafeCopy should not copy more than UNSAFE\_COPY\_THRESHOLD on each iteration | Major | . |
| [HBASE-22488](https://issues.apache.org/jira/browse/HBASE-22488) | Cleanup the explicit timeout value for test methods | Major | . |
| [HBASE-22411](https://issues.apache.org/jira/browse/HBASE-22411) | Refactor codes of moving reigons in RSGroup | Major | rsgroup |
| [HBASE-22467](https://issues.apache.org/jira/browse/HBASE-22467) | WebUI changes to enable Apache Knox UI proxying | Major | UI |
| [HBASE-22474](https://issues.apache.org/jira/browse/HBASE-22474) | Add --mvn-custom-repo parameter to yetus calls | Minor | . |
| [HBASE-20305](https://issues.apache.org/jira/browse/HBASE-20305) | Add option to SyncTable that skip deletes on target cluster | Minor | mapreduce |
| [HBASE-21784](https://issues.apache.org/jira/browse/HBASE-21784) | Dump replication queue should show list of wal files ordered chronologically | Major | Replication, tooling |
| [HBASE-22384](https://issues.apache.org/jira/browse/HBASE-22384) | Formatting issues in administration section of book | Minor | community, documentation |
| [HBASE-21658](https://issues.apache.org/jira/browse/HBASE-21658) | Should get the meta replica number from zk instead of config at client side | Critical | Client |
| [HBASE-22365](https://issues.apache.org/jira/browse/HBASE-22365) | Region may be opened on two RegionServers | Blocker | amv2 |
| [HBASE-22392](https://issues.apache.org/jira/browse/HBASE-22392) | Remove extra/useless + | Trivial | . |
| [HBASE-20494](https://issues.apache.org/jira/browse/HBASE-20494) | Upgrade com.yammer.metrics dependency | Major | dependencies |
| [HBASE-22358](https://issues.apache.org/jira/browse/HBASE-22358) | Change rubocop configuration for method length | Minor | community, shell |
| [HBASE-22379](https://issues.apache.org/jira/browse/HBASE-22379) | Fix Markdown for "Voting on Release Candidates" in book | Minor | community, documentation |
| [HBASE-22109](https://issues.apache.org/jira/browse/HBASE-22109) | Update hbase shaded content checker after guava update in hadoop branch-3.0 to 27.0-jre | Minor | . |
| [HBASE-22087](https://issues.apache.org/jira/browse/HBASE-22087) | Update LICENSE/shading for the dependencies from the latest Hadoop trunk | Minor | hadoop3 |
| [HBASE-22341](https://issues.apache.org/jira/browse/HBASE-22341) | Add explicit guidelines for removing deprecations in book | Major | API, community, documentation |
| [HBASE-22225](https://issues.apache.org/jira/browse/HBASE-22225) | Profiler tab on Master/RS UI not working w/o comprehensive message | Minor | UI |
| [HBASE-22291](https://issues.apache.org/jira/browse/HBASE-22291) | Fix recovery of recovered.edits files under root dir | Major | . |
| [HBASE-22283](https://issues.apache.org/jira/browse/HBASE-22283) | Print row and table information when failed to get region location | Major | Client, logging |
| [HBASE-22296](https://issues.apache.org/jira/browse/HBASE-22296) | Remove TestFromClientSide.testGetStartEndKeysWithRegionReplicas | Major | test |
| [HBASE-22250](https://issues.apache.org/jira/browse/HBASE-22250) | The same constants used in many places should be placed in constant classes | Minor | Client, conf, regionserver |
| [HBASE-20586](https://issues.apache.org/jira/browse/HBASE-20586) | SyncTable tool: Add support for cross-realm remote clusters | Major | mapreduce, Operability, Replication |
| [HBASE-21257](https://issues.apache.org/jira/browse/HBASE-21257) | misspelled words.[occured -\> occurred] | Trivial | . |
| [HBASE-22193](https://issues.apache.org/jira/browse/HBASE-22193) | Add backoff when region failed open too many times | Major | . |
| [HBASE-22188](https://issues.apache.org/jira/browse/HBASE-22188) | Make TestSplitMerge more stable | Major | test |
| [HBASE-22097](https://issues.apache.org/jira/browse/HBASE-22097) | Modify the description of split command in shell | Trivial | shell |
| [HBASE-21964](https://issues.apache.org/jira/browse/HBASE-21964) | unset Quota by Throttle Type | Major | master |
| [HBASE-22093](https://issues.apache.org/jira/browse/HBASE-22093) | Combine TestRestoreSnapshotFromClientWithRegionReplicas to CloneSnapshotFromClientAfterSplittingRegionTestBase#testCloneSnapshotAfterSplittingRegion | Major | . |
| [HBASE-22009](https://issues.apache.org/jira/browse/HBASE-22009) | Improve RSGroupInfoManagerImpl#getDefaultServers() | Minor | rsgroup |
| [HBASE-22032](https://issues.apache.org/jira/browse/HBASE-22032) | KeyValue validation should check for null byte array | Major | . |
| [HBASE-21667](https://issues.apache.org/jira/browse/HBASE-21667) | Move to latest ASF Parent POM | Minor | build |
| [HBASE-21810](https://issues.apache.org/jira/browse/HBASE-21810) | bulkload support set hfile compression on client | Major | mapreduce |
| [HBASE-21987](https://issues.apache.org/jira/browse/HBASE-21987) | Simplify RSGroupInfoManagerImpl#flushConfig() for offline mode | Minor | rsgroup |
| [HBASE-21871](https://issues.apache.org/jira/browse/HBASE-21871) | Support to specify a peer table name in VerifyReplication tool | Major | . |
| [HBASE-21255](https://issues.apache.org/jira/browse/HBASE-21255) | [acl] Refactor TablePermission into three classes (Global, Namespace, Table) | Major | . |
| [HBASE-21410](https://issues.apache.org/jira/browse/HBASE-21410) | A helper page that help find all problematic regions and procedures | Major | . |
| [HBASE-20734](https://issues.apache.org/jira/browse/HBASE-20734) | Colocate recovered edits directory with hbase.wal.dir | Major | MTTR, Recovery, wal |
| [HBASE-20401](https://issues.apache.org/jira/browse/HBASE-20401) | Make \`MAX\_WAIT\` and \`waitIfNotFinished\` in CleanerContext configurable | Minor | master |
| [HBASE-21481](https://issues.apache.org/jira/browse/HBASE-21481) | [acl] Superuser's permissions should not be granted or revoked by any non-su global admin | Major | . |
| [HBASE-21967](https://issues.apache.org/jira/browse/HBASE-21967) | Split TestServerCrashProcedure and TestServerCrashProcedureWithReplicas | Major | . |
| [HBASE-21867](https://issues.apache.org/jira/browse/HBASE-21867) | Support multi-threads in HFileArchiver | Major | . |
| [HBASE-21932](https://issues.apache.org/jira/browse/HBASE-21932) | Use Runtime.getRuntime().halt to terminate regionserver when abort timeout | Major | . |
| [HBASE-21875](https://issues.apache.org/jira/browse/HBASE-21875) | Change the retry logic in RSProcedureDispatcher to 'retry by default, only if xxx' | Major | proc-v2 |
| [HBASE-21780](https://issues.apache.org/jira/browse/HBASE-21780) | Avoid a wide line on the RegionServer webUI for many ZooKeeper servers | Minor | UI, Usability |
| [HBASE-21636](https://issues.apache.org/jira/browse/HBASE-21636) | Enhance the shell scan command to support missing scanner specifications like ReadType, IsolationLevel etc. | Major | shell |
| [HBASE-21857](https://issues.apache.org/jira/browse/HBASE-21857) | Do not need to check clusterKey if replicationEndpoint is provided when adding a peer | Major | . |
| [HBASE-21201](https://issues.apache.org/jira/browse/HBASE-21201) | Support to run VerifyReplication MR tool without peerid | Major | hbase-operator-tools |
| [HBASE-21816](https://issues.apache.org/jira/browse/HBASE-21816) | Print source cluster replication config directory | Trivial | Replication |
| [HBASE-19616](https://issues.apache.org/jira/browse/HBASE-19616) | Review of LogCleaner Class | Minor | . |
| [HBASE-21830](https://issues.apache.org/jira/browse/HBASE-21830) | Backport HBASE-20577 (Make Log Level page design consistent with the design of other pages in UI) to branch-2 | Major | UI, Usability |
| [HBASE-21833](https://issues.apache.org/jira/browse/HBASE-21833) | Use NettyAsyncFSWALConfigHelper.setEventLoopConfig to prevent creating too many netty event loop when executing TestHRegion | Minor | test |
| [HBASE-21634](https://issues.apache.org/jira/browse/HBASE-21634) | Print error message when user uses unacceptable values for LIMIT while setting quotas. | Minor | . |
| [HBASE-21789](https://issues.apache.org/jira/browse/HBASE-21789) | Rewrite MetaTableAccessor.multiMutate with Table.coprocessorService | Major | Client, Coprocessors |
| [HBASE-21689](https://issues.apache.org/jira/browse/HBASE-21689) | Make table/namespace specific current quota info available in shell(describe\_namespace & describe) | Minor | . |
| [HBASE-20215](https://issues.apache.org/jira/browse/HBASE-20215) | Rename CollectionUtils to ConcurrentMapUtils | Trivial | . |
| [HBASE-21720](https://issues.apache.org/jira/browse/HBASE-21720) | metric to measure how actions are distributed to servers within a MultiAction | Minor | Client, metrics, monitoring |
| [HBASE-21595](https://issues.apache.org/jira/browse/HBASE-21595) | Print thread's information and stack traces when RS is aborting forcibly | Minor | regionserver |
| [HBASE-20209](https://issues.apache.org/jira/browse/HBASE-20209) | Do Not Use Both Map containsKey and get Methods in Replication Sink | Trivial | Replication |
| [HBASE-21712](https://issues.apache.org/jira/browse/HBASE-21712) | Make submit-patch.py python3 compatible | Minor | tooling |
| [HBASE-21590](https://issues.apache.org/jira/browse/HBASE-21590) | Optimize trySkipToNextColumn in StoreScanner a bit | Critical | Performance, Scanners |
| [HBASE-21297](https://issues.apache.org/jira/browse/HBASE-21297) | ModifyTableProcedure can throw TNDE instead of IOE in case of REGION\_REPLICATION change | Minor | . |
| [HBASE-21700](https://issues.apache.org/jira/browse/HBASE-21700) | Simplify the implementation of RSGroupInfoManagerImpl | Major | rsgroup |
| [HBASE-21694](https://issues.apache.org/jira/browse/HBASE-21694) | Add append\_peer\_exclude\_tableCFs and remove\_peer\_exclude\_tableCFs shell commands | Major | . |
| [HBASE-21645](https://issues.apache.org/jira/browse/HBASE-21645) | Perform sanity check and disallow table creation/modification with region replication \< 1 | Minor | . |
| [HBASE-21360](https://issues.apache.org/jira/browse/HBASE-21360) | Disable printing of stack-trace in shell for quotas | Minor | shell |
| [HBASE-21662](https://issues.apache.org/jira/browse/HBASE-21662) | Add append\_peer\_exclude\_namespaces and remove\_peer\_exclude\_namespaces shell commands | Major | . |
| [HBASE-21659](https://issues.apache.org/jira/browse/HBASE-21659) | Avoid to load duplicate coprocessors in system config and table descriptor | Minor | . |
| [HBASE-21642](https://issues.apache.org/jira/browse/HBASE-21642) | CopyTable by reading snapshot and bulkloading will save a lot of time. | Major | . |
| [HBASE-21643](https://issues.apache.org/jira/browse/HBASE-21643) | Introduce two new region coprocessor method and deprecated postMutationBeforeWAL | Major | . |
| [HBASE-21640](https://issues.apache.org/jira/browse/HBASE-21640) | Remove the TODO when increment zero | Major | . |
| [HBASE-21631](https://issues.apache.org/jira/browse/HBASE-21631) | list\_quotas should print human readable values for LIMIT | Minor | shell |
| [HBASE-21635](https://issues.apache.org/jira/browse/HBASE-21635) | Use maven enforcer to ban imports from illegal packages | Major | build |
| [HBASE-21514](https://issues.apache.org/jira/browse/HBASE-21514) | Refactor CacheConfig | Major | . |
| [HBASE-21520](https://issues.apache.org/jira/browse/HBASE-21520) | TestMultiColumnScanner cost long time when using ROWCOL bloom type | Major | test |
| [HBASE-21554](https://issues.apache.org/jira/browse/HBASE-21554) | Show replication endpoint classname for replication peer on master web UI | Minor | UI |
| [HBASE-21549](https://issues.apache.org/jira/browse/HBASE-21549) | Add shell command for serial replication peer | Major | . |
| [HBASE-21283](https://issues.apache.org/jira/browse/HBASE-21283) | Add new shell command 'rit' for listing regions in transition | Minor | Operability, shell |
| [HBASE-21567](https://issues.apache.org/jira/browse/HBASE-21567) | Allow overriding configs starting up the shell | Major | shell |
| [HBASE-21413](https://issues.apache.org/jira/browse/HBASE-21413) | Empty meta log doesn't get split when restart whole cluster | Major | . |
| [HBASE-21524](https://issues.apache.org/jira/browse/HBASE-21524) | Unnecessary DEBUG log in ConnectionImplementation#isTableEnabled | Major | Client |
| [HBASE-21511](https://issues.apache.org/jira/browse/HBASE-21511) | Remove in progress snapshot check in SnapshotFileCache#getUnreferencedFiles | Minor | snapshots |
| [HBASE-21480](https://issues.apache.org/jira/browse/HBASE-21480) | Taking snapshot when RS crashes prevent we bring the regions online | Major | snapshots |
| [HBASE-21485](https://issues.apache.org/jira/browse/HBASE-21485) | Add more debug logs for remote procedure execution | Major | proc-v2 |
| [HBASE-21328](https://issues.apache.org/jira/browse/HBASE-21328) | add HBASE\_DISABLE\_HADOOP\_CLASSPATH\_LOOKUP switch to hbase-env.sh | Minor | documentation, Operability |
| [HBASE-19682](https://issues.apache.org/jira/browse/HBASE-19682) | Use Collections.emptyList() For Empty List Values | Minor | . |
| [HBASE-21388](https://issues.apache.org/jira/browse/HBASE-21388) | No need to instantiate MemStoreLAB for master which not carry table | Major | . |
| [HBASE-21325](https://issues.apache.org/jira/browse/HBASE-21325) | Force to terminate regionserver when abort hang in somewhere | Major | . |
| [HBASE-21385](https://issues.apache.org/jira/browse/HBASE-21385) | HTable.delete request use rpc call directly instead of AsyncProcess | Major | . |
| [HBASE-21318](https://issues.apache.org/jira/browse/HBASE-21318) | Make RefreshHFilesClient runnable | Minor | HFile |
| [HBASE-21263](https://issues.apache.org/jira/browse/HBASE-21263) | Mention compression algorithm along with other storefile details | Minor | . |
| [HBASE-21290](https://issues.apache.org/jira/browse/HBASE-21290) | No need to instantiate BlockCache for master which not carry table | Major | . |
| [HBASE-21256](https://issues.apache.org/jira/browse/HBASE-21256) | Improve IntegrationTestBigLinkedList for testing huge data | Major | integration tests |
| [HBASE-21251](https://issues.apache.org/jira/browse/HBASE-21251) | Refactor RegionMover | Major | Operability |
| [HBASE-21303](https://issues.apache.org/jira/browse/HBASE-21303) | [shell] clear\_deadservers with no args fails | Major | . |
| [HBASE-21098](https://issues.apache.org/jira/browse/HBASE-21098) | Improve Snapshot Performance with Temporary Snapshot Directory when rootDir on S3 | Major | . |
| [HBASE-21299](https://issues.apache.org/jira/browse/HBASE-21299) | List counts of actual region states in master UI tables section | Major | UI |
| [HBASE-21289](https://issues.apache.org/jira/browse/HBASE-21289) | Remove the log "'hbase.regionserver.maxlogs' was deprecated." in AbstractFSWAL | Minor | . |
| [HBASE-21185](https://issues.apache.org/jira/browse/HBASE-21185) | WALPrettyPrinter: Additional useful info to be printed by wal printer tool, for debugability purposes | Minor | Operability |
| [HBASE-21103](https://issues.apache.org/jira/browse/HBASE-21103) | nightly test cache of yetus install needs to be more thorough in verification | Major | test |
| [HBASE-21207](https://issues.apache.org/jira/browse/HBASE-21207) | Add client side sorting functionality in master web UI for table and region server details. | Minor | master, monitoring, UI, Usability |
| [HBASE-20857](https://issues.apache.org/jira/browse/HBASE-20857) | JMX - add Balancer status = enabled / disabled | Major | API, master, metrics, REST, tooling, Usability |
| [HBASE-21164](https://issues.apache.org/jira/browse/HBASE-21164) | reportForDuty to spew less log if master is initializing | Minor | regionserver |
| [HBASE-21204](https://issues.apache.org/jira/browse/HBASE-21204) | NPE when scan raw DELETE\_FAMILY\_VERSION and codec is not set | Major | . |
| [HBASE-20307](https://issues.apache.org/jira/browse/HBASE-20307) | LoadTestTool prints too much zookeeper logging | Minor | tooling |
| [HBASE-21155](https://issues.apache.org/jira/browse/HBASE-21155) | Save on a few log strings and some churn in wal splitter by skipping out early if no logs in dir | Trivial | . |
| [HBASE-21129](https://issues.apache.org/jira/browse/HBASE-21129) | Clean up duplicate codes in #equals and #hashCode methods of Filter | Minor | Filters |
| [HBASE-21157](https://issues.apache.org/jira/browse/HBASE-21157) | Split TableInputFormatScan to individual tests | Minor | test |
| [HBASE-21107](https://issues.apache.org/jira/browse/HBASE-21107) | add a metrics for netty direct memory | Minor | IPC/RPC |
| [HBASE-21153](https://issues.apache.org/jira/browse/HBASE-21153) | Shaded client jars should always build in relevant phase to avoid confusion | Major | build |
| [HBASE-21126](https://issues.apache.org/jira/browse/HBASE-21126) | Add ability for HBase Canary to ignore a configurable number of ZooKeeper down nodes | Minor | canary, Zookeeper |
| [HBASE-20749](https://issues.apache.org/jira/browse/HBASE-20749) | Upgrade our use of checkstyle to 8.6+ | Minor | build, community |
| [HBASE-21071](https://issues.apache.org/jira/browse/HBASE-21071) | HBaseTestingUtility::startMiniCluster() to use builder pattern | Major | test |
| [HBASE-20387](https://issues.apache.org/jira/browse/HBASE-20387) | flaky infrastructure should work for all branches | Critical | test |
| [HBASE-20469](https://issues.apache.org/jira/browse/HBASE-20469) | Directory used for sidelining old recovered edits files should be made configurable | Minor | . |
| [HBASE-20979](https://issues.apache.org/jira/browse/HBASE-20979) | Flaky test reporting should specify what JSON it needs and handle HTTP errors | Minor | test |
| [HBASE-20985](https://issues.apache.org/jira/browse/HBASE-20985) | add two attributes when we do normalization | Major | . |
| [HBASE-20965](https://issues.apache.org/jira/browse/HBASE-20965) | Separate region server report requests to new handlers | Major | Performance |
| [HBASE-20845](https://issues.apache.org/jira/browse/HBASE-20845) | Support set the consistency for Gets and Scans in thrift2 | Major | Thrift |
| [HBASE-20986](https://issues.apache.org/jira/browse/HBASE-20986) | Separate the config of block size when we do log splitting and write Hlog | Major | . |
| [HBASE-19036](https://issues.apache.org/jira/browse/HBASE-19036) | Add action in Chaos Monkey to restart Active Namenode | Minor | . |
| [HBASE-20856](https://issues.apache.org/jira/browse/HBASE-20856) | PITA having to set WAL provider in two places | Minor | Operability, wal |
| [HBASE-20935](https://issues.apache.org/jira/browse/HBASE-20935) | HStore.removeCompactedFiles should log in case it is unable to delete a file | Minor | . |
| [HBASE-20873](https://issues.apache.org/jira/browse/HBASE-20873) | Update doc for Endpoint-based Export | Minor | documentation |
| [HBASE-20672](https://issues.apache.org/jira/browse/HBASE-20672) | New metrics ReadRequestRate and WriteRequestRate | Minor | metrics |
| [HBASE-20617](https://issues.apache.org/jira/browse/HBASE-20617) | Upgrade/remove jetty-jsp | Minor | . |
| [HBASE-20396](https://issues.apache.org/jira/browse/HBASE-20396) | Remove redundant MBean from thrift JMX | Major | Thrift |
| [HBASE-20357](https://issues.apache.org/jira/browse/HBASE-20357) | AccessControlClient API Enhancement | Major | security |
### BUG FIXES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-22563](https://issues.apache.org/jira/browse/HBASE-22563) | Reduce retained jobs for Jenkins pipelines | Major | . |
| [HBASE-22552](https://issues.apache.org/jira/browse/HBASE-22552) | Rewrite TestEndToEndSplitTransaction.testCanSplitJustAfterASplit | Major | test |
| [HBASE-22551](https://issues.apache.org/jira/browse/HBASE-22551) | TestMasterOperationsForRegionReplicas is flakey | Major | read replicas, test |
| [HBASE-22481](https://issues.apache.org/jira/browse/HBASE-22481) | Javadoc Warnings: reference not found | Trivial | documentation |
| [HBASE-22546](https://issues.apache.org/jira/browse/HBASE-22546) | TestRegionServerHostname#testRegionServerHostname fails reliably for me | Major | . |
| [HBASE-22534](https://issues.apache.org/jira/browse/HBASE-22534) | TestCellUtil fails when run on JDK11 | Minor | java, test |
| [HBASE-22536](https://issues.apache.org/jira/browse/HBASE-22536) | TestForeignExceptionSerialization fails when run on JDK11 | Minor | java |
| [HBASE-22535](https://issues.apache.org/jira/browse/HBASE-22535) | TestShellRSGroups fails when run on JDK11 | Minor | java, shell |
| [HBASE-22518](https://issues.apache.org/jira/browse/HBASE-22518) | yetus personality is treating branch-1.4 like earlier branches for hadoopcheck | Major | test |
| [HBASE-22513](https://issues.apache.org/jira/browse/HBASE-22513) | Admin#getQuota does not work correctly if exceedThrottleQuota is set | Major | Quotas |
| [HBASE-22522](https://issues.apache.org/jira/browse/HBASE-22522) | The integration test in master branch's nightly job has error "ERROR: Only found 1050 rows." | Major | . |
| [HBASE-22490](https://issues.apache.org/jira/browse/HBASE-22490) | Nightly client integration test fails with hadoop-3 | Major | build |
| [HBASE-22502](https://issues.apache.org/jira/browse/HBASE-22502) | Purge the logs when we reach the EOF for the last wal file when replication | Major | . |
| [HBASE-22503](https://issues.apache.org/jira/browse/HBASE-22503) | Failed to upgrade to 2.2+ as the global permission which storaged in zk is not right | Blocker | . |
| [HBASE-22487](https://issues.apache.org/jira/browse/HBASE-22487) | getMostLoadedRegions is unused | Trivial | regionserver |
| [HBASE-22485](https://issues.apache.org/jira/browse/HBASE-22485) | Fix failed ut TestClusterRestartFailover | Major | . |
| [HBASE-22486](https://issues.apache.org/jira/browse/HBASE-22486) | Fix flaky test TestLockManager | Major | . |
| [HBASE-22471](https://issues.apache.org/jira/browse/HBASE-22471) | Our nightly jobs for master and branch-2 are still using hadoop-2.7.1 in integration test | Major | build |
| [HBASE-22003](https://issues.apache.org/jira/browse/HBASE-22003) | Fix flaky test TestVerifyReplication.testHBase14905 | Major | . |
| [HBASE-22441](https://issues.apache.org/jira/browse/HBASE-22441) | BucketCache NullPointerException in cacheBlock | Major | BucketCache |
| [HBASE-22473](https://issues.apache.org/jira/browse/HBASE-22473) | Split TestSCP | Major | Recovery, test |
| [HBASE-22456](https://issues.apache.org/jira/browse/HBASE-22456) | Polish TestSplitTransitionOnCluster | Major | test |
| [HBASE-21800](https://issues.apache.org/jira/browse/HBASE-21800) | RegionServer aborted due to NPE from MetaTableMetrics coprocessor | Critical | Coprocessors, meta, metrics, Operability |
| [HBASE-22462](https://issues.apache.org/jira/browse/HBASE-22462) | Should run a 'mvn install' at the end of hadoop check in pre commit job | Major | build |
| [HBASE-22440](https://issues.apache.org/jira/browse/HBASE-22440) | HRegionServer#getWalGroupsReplicationStatus() throws NPE | Major | regionserver, Replication |
| [HBASE-22226](https://issues.apache.org/jira/browse/HBASE-22226) | Incorrect level for headings in asciidoc | Trivial | documentation |
| [HBASE-22442](https://issues.apache.org/jira/browse/HBASE-22442) | Nightly build is failing with hadoop 3.x | Major | build, hadoop3 |
| [HBASE-20970](https://issues.apache.org/jira/browse/HBASE-20970) | Update hadoop check versions for hadoop3 in hbase-personality | Major | build |
| [HBASE-22424](https://issues.apache.org/jira/browse/HBASE-22424) | Interactions in RSGroup test classes will cause TestRSGroupsAdmin2.testMoveServersAndTables and TestRSGroupsBalance.testGroupBalance flaky | Major | rsgroup |
| [HBASE-22404](https://issues.apache.org/jira/browse/HBASE-22404) | Open/Close region request may be executed twice when master restart | Major | . |
| [HBASE-22274](https://issues.apache.org/jira/browse/HBASE-22274) | Cell size limit check on append should consider cell's previous size. | Minor | . |
| [HBASE-22072](https://issues.apache.org/jira/browse/HBASE-22072) | High read/write intensive regions may cause long crash recovery | Major | Performance, Recovery |
| [HBASE-22324](https://issues.apache.org/jira/browse/HBASE-22324) | loss a mass of data when the sequenceId of cells greater than Integer.Max, because MemStoreMergerSegmentsIterator can not merge segments | Blocker | in-memory-compaction |
| [HBASE-21777](https://issues.apache.org/jira/browse/HBASE-21777) | "Tune compaction throughput" debug messages even when nothing has changed | Trivial | Compaction |
| [HBASE-22360](https://issues.apache.org/jira/browse/HBASE-22360) | Abort timer doesn't set when abort is called during graceful shutdown process | Major | regionserver |
| [HBASE-20851](https://issues.apache.org/jira/browse/HBASE-20851) | Change rubocop config for max line length of 100 | Minor | community, shell |
| [HBASE-21467](https://issues.apache.org/jira/browse/HBASE-21467) | Fix flaky test TestCoprocessorClassLoader.testCleanupOldJars | Minor | . |
| [HBASE-22312](https://issues.apache.org/jira/browse/HBASE-22312) | Hadoop 3 profile for hbase-shaded-mapreduce should like mapreduce as a provided dependency | Major | mapreduce, shading |
| [HBASE-22314](https://issues.apache.org/jira/browse/HBASE-22314) | shaded byo-hadoop client should list needed hadoop modules as provided scope to avoid inclusion of unnecessary transitive depednencies | Major | hadoop2, hadoop3, shading |
| [HBASE-22047](https://issues.apache.org/jira/browse/HBASE-22047) | LeaseException in Scan should be retired | Major | Client, Scanners |
| [HBASE-22343](https://issues.apache.org/jira/browse/HBASE-22343) | Make procedure retry interval configurable in test | Major | amv2, test |
| [HBASE-22190](https://issues.apache.org/jira/browse/HBASE-22190) | SnapshotFileCache may fail to load the correct snapshot file list when there is an on-going snapshot operation | Blocker | snapshots |
| [HBASE-22354](https://issues.apache.org/jira/browse/HBASE-22354) | master never sets abortRequested, and thus abort timeout doesn't work for it | Major | . |
| [HBASE-22350](https://issues.apache.org/jira/browse/HBASE-22350) | Rewrite TestClientOperationTimeout so we do not timeout when creating table | Major | test |
| [HBASE-22340](https://issues.apache.org/jira/browse/HBASE-22340) | Corrupt KeyValue is silently ignored | Critical | wal |
| [HBASE-22054](https://issues.apache.org/jira/browse/HBASE-22054) | Space Quota: Compaction is not working for super user in case of NO\_WRITES\_COMPACTIONS | Minor | . |
| [HBASE-22236](https://issues.apache.org/jira/browse/HBASE-22236) | AsyncNonMetaRegionLocator should not cache HRegionLocation with null location | Major | asyncclient |
| [HBASE-22086](https://issues.apache.org/jira/browse/HBASE-22086) | space quota issue: deleting snapshot doesn't update the usage of table | Minor | . |
| [HBASE-22298](https://issues.apache.org/jira/browse/HBASE-22298) | branch-2.2 nightly fails "[ForOverride] Method annotated @ForOverride must have protected or package-private visibility" | Major | . |
| [HBASE-22292](https://issues.apache.org/jira/browse/HBASE-22292) | PreemptiveFastFailInterceptor clean repeatedFailuresMap issue | Blocker | . |
| [HBASE-22230](https://issues.apache.org/jira/browse/HBASE-22230) | REST Server drops connection on long scans | Major | . |
| [HBASE-22200](https://issues.apache.org/jira/browse/HBASE-22200) | WALSplitter.hasRecoveredEdits should use same FS instance from WAL region dir | Major | wal |
| [HBASE-22286](https://issues.apache.org/jira/browse/HBASE-22286) | License handling incorrectly lists CDDL/GPLv2+CE as safe to not aggregate | Critical | build, community |
| [HBASE-22282](https://issues.apache.org/jira/browse/HBASE-22282) | Should deal with error in the callback of RawAsyncHBaseAdmin.splitRegion methods | Major | Admin, asyncclient |
| [HBASE-22278](https://issues.apache.org/jira/browse/HBASE-22278) | RawAsyncHBaseAdmin should not use cached region location | Major | Admin, asyncclient |
| [HBASE-22222](https://issues.apache.org/jira/browse/HBASE-22222) | Site build fails after hbase-thirdparty upgrade | Blocker | website |
| [HBASE-22249](https://issues.apache.org/jira/browse/HBASE-22249) | Rest Server throws NoClassDefFoundError with Java 11 (run-time) | Major | . |
| [HBASE-22235](https://issues.apache.org/jira/browse/HBASE-22235) | OperationStatus.{SUCCESS\|FAILURE\|NOT\_RUN} are not visible to 3rd party coprocessors | Major | Coprocessors |
| [HBASE-22207](https://issues.apache.org/jira/browse/HBASE-22207) | Fix flakey TestAssignmentManager.testAssignSocketTimeout | Major | test |
| [HBASE-22202](https://issues.apache.org/jira/browse/HBASE-22202) | Fix new findbugs issues after we upgrade hbase-thirdparty dependencies | Major | findbugs |
| [HBASE-22144](https://issues.apache.org/jira/browse/HBASE-22144) | MultiRowRangeFilter does not work with reversed scans | Critical | Filters, Scanners |
| [HBASE-22198](https://issues.apache.org/jira/browse/HBASE-22198) | Fix flakey TestAsyncTableGetMultiThreaded | Major | test |
| [HBASE-22185](https://issues.apache.org/jira/browse/HBASE-22185) | RAMQueueEntry#writeToCache should freeBlock if any exception encountered instead of the IOException catch block | Major | . |
| [HBASE-22163](https://issues.apache.org/jira/browse/HBASE-22163) | Should not archive the compacted store files when region warmup | Blocker | . |
| [HBASE-22178](https://issues.apache.org/jira/browse/HBASE-22178) | Introduce a createTableAsync with TableDescriptor method in Admin | Major | Admin |
| [HBASE-22180](https://issues.apache.org/jira/browse/HBASE-22180) | Make TestBlockEvictionFromClient.testBlockRefCountAfterSplits more stable | Major | test |
| [HBASE-22179](https://issues.apache.org/jira/browse/HBASE-22179) | Fix RawAsyncHBaseAdmin.getCompactionState | Major | Admin, asyncclient |
| [HBASE-22177](https://issues.apache.org/jira/browse/HBASE-22177) | Do not recreate IOException in RawAsyncHBaseAdmin.adminCall | Major | Admin, asyncclient |
| [HBASE-22070](https://issues.apache.org/jira/browse/HBASE-22070) | Checking restoreDir in RestoreSnapshotHelper | Minor | snapshots |
| [HBASE-20912](https://issues.apache.org/jira/browse/HBASE-20912) | Add import order config in dev support for eclipse | Major | . |
| [HBASE-22133](https://issues.apache.org/jira/browse/HBASE-22133) | Forward port HBASE-22073 "/rits.jsp throws an exception if no procedure" to branch-2.2+ | Major | UI |
| [HBASE-20911](https://issues.apache.org/jira/browse/HBASE-20911) | correct Swtich/case indentation in formatter template for eclipse | Major | . |
| [HBASE-21688](https://issues.apache.org/jira/browse/HBASE-21688) | Address WAL filesystem issues | Major | Filesystem Integration, wal |
| [HBASE-22121](https://issues.apache.org/jira/browse/HBASE-22121) | AsyncAdmin can not deal with non default meta replica | Major | Admin, asyncclient, Client |
| [HBASE-22115](https://issues.apache.org/jira/browse/HBASE-22115) | HBase RPC aspires to grow an infinite tree of trace scopes; some other places are also unsafe | Critical | . |
| [HBASE-22123](https://issues.apache.org/jira/browse/HBASE-22123) | REST gateway reports Insufficient permissions exceptions as 404 Not Found | Minor | REST |
| [HBASE-21135](https://issues.apache.org/jira/browse/HBASE-21135) | Build fails on windows as it fails to parse windows path during license check | Major | build |
| [HBASE-21781](https://issues.apache.org/jira/browse/HBASE-21781) | list\_deadservers elapsed time is incorrect | Major | shell |
| [HBASE-22100](https://issues.apache.org/jira/browse/HBASE-22100) | False positive for error prone warnings in pre commit job | Minor | build |
| [HBASE-22098](https://issues.apache.org/jira/browse/HBASE-22098) | Backport HBASE-18667 "Disable error-prone for hbase-protocol-shaded" to branch-2 | Major | build |
| [HBASE-20662](https://issues.apache.org/jira/browse/HBASE-20662) | Increasing space quota on a violated table does not remove SpaceViolationPolicy.DISABLE enforcement | Major | . |
| [HBASE-22057](https://issues.apache.org/jira/browse/HBASE-22057) | Impose upper-bound on size of ZK ops sent in a single multi() | Major | . |
| [HBASE-22074](https://issues.apache.org/jira/browse/HBASE-22074) | Should use procedure store to persist the state in reportRegionStateTransition | Blocker | amv2, proc-v2 |
| [HBASE-21619](https://issues.apache.org/jira/browse/HBASE-21619) | Fix warning message caused by incorrect ternary operator evaluation | Trivial | . |
| [HBASE-22095](https://issues.apache.org/jira/browse/HBASE-22095) | Taking a snapshot fails in local mode | Major | . |
| [HBASE-22061](https://issues.apache.org/jira/browse/HBASE-22061) | SplitTableRegionProcedure should hold the lock of its daughter regions | Major | . |
| [HBASE-22045](https://issues.apache.org/jira/browse/HBASE-22045) | Mutable range histogram reports incorrect outliers | Major | . |
| [HBASE-21736](https://issues.apache.org/jira/browse/HBASE-21736) | Remove the server from online servers before scheduling SCP for it in hbck | Major | hbck2, test |
| [HBASE-22011](https://issues.apache.org/jira/browse/HBASE-22011) | ThriftUtilities.getFromThrift should set filter when not set columns | Major | . |
| [HBASE-21990](https://issues.apache.org/jira/browse/HBASE-21990) | puppycrawl checkstyle dtds 404... moved to sourceforge | Major | build |
| [HBASE-22010](https://issues.apache.org/jira/browse/HBASE-22010) | docs on upgrade from 2.0,2.1 -\> 2.2 renders incorrectly | Minor | documentation |
| [HBASE-22006](https://issues.apache.org/jira/browse/HBASE-22006) | Fix branch-2.1 findbugs warning; causes nightly show as failed. | Major | . |
| [HBASE-21960](https://issues.apache.org/jira/browse/HBASE-21960) | RESTServletContainer not configured for REST Jetty server | Blocker | REST |
| [HBASE-21915](https://issues.apache.org/jira/browse/HBASE-21915) | FileLink$FileLinkInputStream doesn't implement CanUnbuffer | Major | Filesystem Integration |
| [HBASE-21565](https://issues.apache.org/jira/browse/HBASE-21565) | Delete dead server from dead server list too early leads to concurrent Server Crash Procedures(SCP) for a same server | Critical | . |
| [HBASE-21740](https://issues.apache.org/jira/browse/HBASE-21740) | NPE happens while shutdown the RS | Major | . |
| [HBASE-21866](https://issues.apache.org/jira/browse/HBASE-21866) | Do not move the table to null rsgroup when creating an existing table | Major | proc-v2, rsgroup |
| [HBASE-21983](https://issues.apache.org/jira/browse/HBASE-21983) | Should track the scan metrics in AsyncScanSingleRegionRpcRetryingCaller if scan metrics is enabled | Major | asyncclient, Client |
| [HBASE-21980](https://issues.apache.org/jira/browse/HBASE-21980) | Fix typo in AbstractTestAsyncTableRegionReplicasRead | Major | test |
| [HBASE-21487](https://issues.apache.org/jira/browse/HBASE-21487) | Concurrent modify table ops can lead to unexpected results | Major | . |
| [HBASE-20724](https://issues.apache.org/jira/browse/HBASE-20724) | Sometimes some compacted storefiles are still opened after region failover | Critical | . |
| [HBASE-21961](https://issues.apache.org/jira/browse/HBASE-21961) | Infinite loop in AsyncNonMetaRegionLocator if there is only one region and we tried to locate before a non empty row | Critical | asyncclient, Client |
| [HBASE-21943](https://issues.apache.org/jira/browse/HBASE-21943) | The usage of RegionLocations.mergeRegionLocations is wrong for async client | Critical | asyncclient, Client |
| [HBASE-21947](https://issues.apache.org/jira/browse/HBASE-21947) | TestShell is broken after we remove the jackson dependencies | Major | dependencies, shell |
| [HBASE-21942](https://issues.apache.org/jira/browse/HBASE-21942) | [UI] requests per second is incorrect in rsgroup page(rsgroup.jsp) | Minor | . |
| [HBASE-21922](https://issues.apache.org/jira/browse/HBASE-21922) | BloomContext#sanityCheck may failed when use ROWPREFIX\_DELIMITED bloom filter | Major | . |
| [HBASE-21929](https://issues.apache.org/jira/browse/HBASE-21929) | The checks at the end of TestRpcClientLeaks are not executed | Major | test |
| [HBASE-21938](https://issues.apache.org/jira/browse/HBASE-21938) | Add a new ClusterMetrics.Option SERVERS\_NAME to only return the live region servers's name without metrics | Major | . |
| [HBASE-21928](https://issues.apache.org/jira/browse/HBASE-21928) | Deprecated HConstants.META\_QOS | Major | Client, rpc |
| [HBASE-21899](https://issues.apache.org/jira/browse/HBASE-21899) | Fix missing variables in slf4j Logger | Trivial | logging |
| [HBASE-21910](https://issues.apache.org/jira/browse/HBASE-21910) | The nonce implementation is wrong for AsyncTable | Critical | asyncclient, Client |
| [HBASE-21900](https://issues.apache.org/jira/browse/HBASE-21900) | Infinite loop in AsyncMetaRegionLocator if we can not get the location for meta | Major | asyncclient, Client |
| [HBASE-21890](https://issues.apache.org/jira/browse/HBASE-21890) | Use execute instead of submit to submit a task in RemoteProcedureDispatcher | Critical | proc-v2 |
| [HBASE-21889](https://issues.apache.org/jira/browse/HBASE-21889) | Use thrift 0.12.0 when build thrift by compile-thrift profile | Major | . |
| [HBASE-21785](https://issues.apache.org/jira/browse/HBASE-21785) | master reports open regions as RITs and also messes up rit age metric | Major | . |
| [HBASE-21854](https://issues.apache.org/jira/browse/HBASE-21854) | Race condition in TestProcedureSkipPersistence | Minor | proc-v2 |
| [HBASE-21862](https://issues.apache.org/jira/browse/HBASE-21862) | IPCUtil.wrapException should keep the original exception types for all the connection exceptions | Blocker | . |
| [HBASE-18484](https://issues.apache.org/jira/browse/HBASE-18484) | VerifyRep by snapshot does not work when Yarn / SourceHBase / PeerHBase located in different HDFS clusters | Major | Replication |
| [HBASE-21775](https://issues.apache.org/jira/browse/HBASE-21775) | The BufferedMutator doesn't ever refresh region location cache | Major | Client |
| [HBASE-21843](https://issues.apache.org/jira/browse/HBASE-21843) | RegionGroupingProvider breaks the meta wal file name pattern which may cause data loss for meta region | Blocker | wal |
| [HBASE-21795](https://issues.apache.org/jira/browse/HBASE-21795) | Client application may get stuck (time bound) if a table modify op is called immediately after split op | Critical | amv2 |
| [HBASE-21840](https://issues.apache.org/jira/browse/HBASE-21840) | TestHRegionWithInMemoryFlush fails with NPE | Blocker | test |
| [HBASE-21811](https://issues.apache.org/jira/browse/HBASE-21811) | region can be opened on two servers due to race condition with procedures and server reports | Blocker | amv2 |
| [HBASE-21644](https://issues.apache.org/jira/browse/HBASE-21644) | Modify table procedure runs infinitely for a table having region replication \> 1 | Critical | Admin |
| [HBASE-21733](https://issues.apache.org/jira/browse/HBASE-21733) | SnapshotQuotaObserverChore should only fetch space quotas | Major | . |
| [HBASE-21699](https://issues.apache.org/jira/browse/HBASE-21699) | Create table failed when using SPLITS\_FILE =\> 'splits.txt' | Blocker | Client, shell |
| [HBASE-21535](https://issues.apache.org/jira/browse/HBASE-21535) | Zombie Master detector is not working | Critical | master |
| [HBASE-21770](https://issues.apache.org/jira/browse/HBASE-21770) | Should deal with meta table in HRegionLocator.getAllRegionLocations | Major | Client |
| [HBASE-21754](https://issues.apache.org/jira/browse/HBASE-21754) | ReportRegionStateTransitionRequest should be executed in priority executor | Major | . |
| [HBASE-21475](https://issues.apache.org/jira/browse/HBASE-21475) | Put mutation (having TTL set) added via co-processor is retrieved even after TTL expires | Major | Coprocessors |
| [HBASE-21749](https://issues.apache.org/jira/browse/HBASE-21749) | RS UI may throw NPE and make rs-status page inaccessible with multiwal and replication | Major | Replication, UI |
| [HBASE-21746](https://issues.apache.org/jira/browse/HBASE-21746) | Fix two concern cases in RegionMover | Major | . |
| [HBASE-21732](https://issues.apache.org/jira/browse/HBASE-21732) | Should call toUpperCase before using Enum.valueOf in some methods for ColumnFamilyDescriptor | Critical | Client |
| [HBASE-21704](https://issues.apache.org/jira/browse/HBASE-21704) | The implementation of DistributedHBaseCluster.getServerHoldingRegion is incorrect | Major | . |
| [HBASE-20917](https://issues.apache.org/jira/browse/HBASE-20917) | MetaTableMetrics#stop references uninitialized requestsMap for non-meta region | Major | meta, metrics |
| [HBASE-21639](https://issues.apache.org/jira/browse/HBASE-21639) | maxHeapUsage value not read properly from config during EntryBuffers initialization | Minor | . |
| [HBASE-21225](https://issues.apache.org/jira/browse/HBASE-21225) | Having RPC & Space quota on a table/Namespace doesn't allow space quota to be removed using 'NONE' | Major | . |
| [HBASE-21707](https://issues.apache.org/jira/browse/HBASE-21707) | Fix warnings in hbase-rsgroup module and also make the UTs more stable | Major | Region Assignment, rsgroup |
| [HBASE-20220](https://issues.apache.org/jira/browse/HBASE-20220) | [RSGroup] Check if table exists in the cluster before moving it to the specified regionserver group | Major | rsgroup |
| [HBASE-21691](https://issues.apache.org/jira/browse/HBASE-21691) | Fix flaky test TestRecoveredEdits | Major | . |
| [HBASE-21695](https://issues.apache.org/jira/browse/HBASE-21695) | Fix flaky test TestRegionServerAbortTimeout | Major | . |
| [HBASE-21614](https://issues.apache.org/jira/browse/HBASE-21614) | RIT recovery with ServerCrashProcedure doesn't account for all regions | Critical | amv2 |
| [HBASE-21618](https://issues.apache.org/jira/browse/HBASE-21618) | Scan with the same startRow(inclusive=true) and stopRow(inclusive=false) returns one result | Critical | Client |
| [HBASE-21683](https://issues.apache.org/jira/browse/HBASE-21683) | Reset readsEnabled flag after successfully flushing the primary region | Critical | read replicas |
| [HBASE-21630](https://issues.apache.org/jira/browse/HBASE-21630) | [shell] Define ENDKEY == STOPROW (we have ENDROW) | Trivial | shell |
| [HBASE-21547](https://issues.apache.org/jira/browse/HBASE-21547) | Precommit uses master flaky list for other branches | Major | test |
| [HBASE-21660](https://issues.apache.org/jira/browse/HBASE-21660) | Apply the cell to right memstore for increment/append operation | Major | . |
| [HBASE-21646](https://issues.apache.org/jira/browse/HBASE-21646) | Flakey TestTableSnapshotInputFormat; DisableTable not completing... | Major | test |
| [HBASE-21545](https://issues.apache.org/jira/browse/HBASE-21545) | NEW\_VERSION\_BEHAVIOR breaks Get/Scan with specified columns | Major | API |
| [HBASE-21629](https://issues.apache.org/jira/browse/HBASE-21629) | draining\_servers.rb is broken | Major | scripts |
| [HBASE-21621](https://issues.apache.org/jira/browse/HBASE-21621) | Reversed scan does not return expected number of rows | Critical | Scanners |
| [HBASE-21620](https://issues.apache.org/jira/browse/HBASE-21620) | Problem in scan query when using more than one column prefix filter in some cases. | Major | Scanners |
| [HBASE-21610](https://issues.apache.org/jira/browse/HBASE-21610) | numOpenConnections metric is set to -1 when zero server channel exist | Minor | metrics |
| [HBASE-21498](https://issues.apache.org/jira/browse/HBASE-21498) | Master OOM when SplitTableRegionProcedure new CacheConfig and instantiate a new BlockCache | Major | . |
| [HBASE-21592](https://issues.apache.org/jira/browse/HBASE-21592) | quota.addGetResult(r) throw NPE | Major | . |
| [HBASE-21589](https://issues.apache.org/jira/browse/HBASE-21589) | TestCleanupMetaWAL fails | Blocker | test, wal |
| [HBASE-21575](https://issues.apache.org/jira/browse/HBASE-21575) | memstore above high watermark message is logged too much | Minor | logging, regionserver |
| [HBASE-21582](https://issues.apache.org/jira/browse/HBASE-21582) | If call HBaseAdmin#snapshotAsync but forget call isSnapshotFinished, then SnapshotHFileCleaner will skip to run every time | Major | . |
| [HBASE-21568](https://issues.apache.org/jira/browse/HBASE-21568) | Disable use of BlockCache for LoadIncrementalHFiles | Major | Client |
| [HBASE-21453](https://issues.apache.org/jira/browse/HBASE-21453) | Convert ReadOnlyZKClient to DEBUG instead of INFO | Major | logging, Zookeeper |
| [HBASE-21559](https://issues.apache.org/jira/browse/HBASE-21559) | The RestoreSnapshotFromClientTestBase related UT are flaky | Major | . |
| [HBASE-21551](https://issues.apache.org/jira/browse/HBASE-21551) | Memory leak when use scan with STREAM at server side | Blocker | regionserver |
| [HBASE-21550](https://issues.apache.org/jira/browse/HBASE-21550) | Add a new method preCreateTableRegionInfos for MasterObserver which allows CPs to modify the TableDescriptor | Major | Coprocessors |
| [HBASE-21479](https://issues.apache.org/jira/browse/HBASE-21479) | Individual tests in TestHRegionReplayEvents class are failing | Major | . |
| [HBASE-21518](https://issues.apache.org/jira/browse/HBASE-21518) | TestMasterFailoverWithProcedures is flaky | Major | . |
| [HBASE-21504](https://issues.apache.org/jira/browse/HBASE-21504) | If enable FIFOCompactionPolicy, a compaction may write a "empty" hfile whose maxTimeStamp is long max. This kind of hfile will never be archived. | Critical | Compaction |
| [HBASE-21300](https://issues.apache.org/jira/browse/HBASE-21300) | Fix the wrong reference file path when restoring snapshots for tables with MOB columns | Major | . |
| [HBASE-21507](https://issues.apache.org/jira/browse/HBASE-21507) | Compaction failed when execute AbstractMultiFileWriter.beforeShipped() method | Major | Compaction, regionserver |
| [HBASE-21387](https://issues.apache.org/jira/browse/HBASE-21387) | Race condition surrounding in progress snapshot handling in snapshot cache leads to loss of snapshot files | Major | snapshots |
| [HBASE-21503](https://issues.apache.org/jira/browse/HBASE-21503) | Replication normal source can get stuck due potential race conditions between source wal reader and wal provider initialization threads. | Blocker | Replication |
| [HBASE-21466](https://issues.apache.org/jira/browse/HBASE-21466) | WALProcedureStore uses wrong FileSystem if wal.dir is not under rootdir | Major | . |
| [HBASE-21445](https://issues.apache.org/jira/browse/HBASE-21445) | CopyTable by bulkload will write hfile into yarn's HDFS | Major | mapreduce |
| [HBASE-21437](https://issues.apache.org/jira/browse/HBASE-21437) | Bypassed procedure throw IllegalArgumentException when its state is WAITING\_TIMEOUT | Major | . |
| [HBASE-21439](https://issues.apache.org/jira/browse/HBASE-21439) | StochasticLoadBalancer RegionLoads aren’t being used in RegionLoad cost functions | Major | Balancer |
| [HBASE-20604](https://issues.apache.org/jira/browse/HBASE-20604) | ProtobufLogReader#readNext can incorrectly loop to the same position in the stream until the the WAL is rolled | Critical | Replication, wal |
| [HBASE-21247](https://issues.apache.org/jira/browse/HBASE-21247) | Custom Meta WAL Provider doesn't default to custom WAL Provider whose configuration value is outside the enums in Providers | Major | wal |
| [HBASE-21430](https://issues.apache.org/jira/browse/HBASE-21430) | [hbase-connectors] Move hbase-spark\* modules to hbase-connectors repo | Major | hbase-connectors, spark |
| [HBASE-21438](https://issues.apache.org/jira/browse/HBASE-21438) | TestAdmin2#testGetProcedures fails due to FailedProcedure inaccessible | Major | . |
| [HBASE-21425](https://issues.apache.org/jira/browse/HBASE-21425) | 2.1.1 fails to start over 1.x data; namespace not assigned | Critical | amv2 |
| [HBASE-21407](https://issues.apache.org/jira/browse/HBASE-21407) | Resolve NPE in backup Master UI | Minor | UI |
| [HBASE-21422](https://issues.apache.org/jira/browse/HBASE-21422) | NPE in TestMergeTableRegionsProcedure.testMergeWithoutPONR | Major | proc-v2, test |
| [HBASE-21424](https://issues.apache.org/jira/browse/HBASE-21424) | Change flakies and nightlies so scheduled less often | Major | build |
| [HBASE-21417](https://issues.apache.org/jira/browse/HBASE-21417) | Pre commit build is broken due to surefire plugin crashes | Critical | build |
| [HBASE-21371](https://issues.apache.org/jira/browse/HBASE-21371) | Hbase unable to compile against Hadoop trunk (3.3.0-SNAPSHOT) due to license error | Major | . |
| [HBASE-21391](https://issues.apache.org/jira/browse/HBASE-21391) | RefreshPeerProcedure should also wait master initialized before executing | Major | Replication |
| [HBASE-21342](https://issues.apache.org/jira/browse/HBASE-21342) | FileSystem in use may get closed by other bulk load call in secure bulkLoad | Major | . |
| [HBASE-21349](https://issues.apache.org/jira/browse/HBASE-21349) | Cluster is going down but CatalogJanitor and Normalizer try to run and fail noisely | Minor | . |
| [HBASE-21356](https://issues.apache.org/jira/browse/HBASE-21356) | bulkLoadHFile API should ensure that rs has the source hfile's write permission | Major | . |
| [HBASE-21355](https://issues.apache.org/jira/browse/HBASE-21355) | HStore's storeSize is calculated repeatedly which causing the confusing region split | Blocker | regionserver |
| [HBASE-21334](https://issues.apache.org/jira/browse/HBASE-21334) | TestMergeTableRegionsProcedure is flakey | Major | amv2, proc-v2, test |
| [HBASE-21178](https://issues.apache.org/jira/browse/HBASE-21178) | [BC break] : Get and Scan operation with a custom converter\_class not working | Critical | shell |
| [HBASE-21200](https://issues.apache.org/jira/browse/HBASE-21200) | Memstore flush doesn't finish because of seekToPreviousRow() in memstore scanner. | Critical | Scanners |
| [HBASE-21292](https://issues.apache.org/jira/browse/HBASE-21292) | IdLock.getLockEntry() may hang if interrupted | Major | . |
| [HBASE-21335](https://issues.apache.org/jira/browse/HBASE-21335) | Change the default wait time of HBCK2 tool | Critical | . |
| [HBASE-21291](https://issues.apache.org/jira/browse/HBASE-21291) | Add a test for bypassing stuck state-machine procedures | Major | . |
| [HBASE-21055](https://issues.apache.org/jira/browse/HBASE-21055) | NullPointerException when balanceOverall() but server balance info is null | Major | Balancer |
| [HBASE-21327](https://issues.apache.org/jira/browse/HBASE-21327) | Fix minor logging issue where we don't report servername if no associated SCP | Trivial | amv2 |
| [HBASE-21320](https://issues.apache.org/jira/browse/HBASE-21320) | [canary] Cleanup of usage and add commentary | Major | canary |
| [HBASE-21266](https://issues.apache.org/jira/browse/HBASE-21266) | Not running balancer because processing dead regionservers, but empty dead rs list | Major | . |
| [HBASE-21260](https://issues.apache.org/jira/browse/HBASE-21260) | The whole balancer plans might be aborted if there are more than one plans to move a same region | Major | Balancer, master |
| [HBASE-21280](https://issues.apache.org/jira/browse/HBASE-21280) | Add anchors for each heading in UI | Trivial | UI, Usability |
| [HBASE-20764](https://issues.apache.org/jira/browse/HBASE-20764) | build broken when latest commit is gpg signed | Critical | build |
| [HBASE-18549](https://issues.apache.org/jira/browse/HBASE-18549) | Unclaimed replication queues can go undetected | Critical | Replication |
| [HBASE-21248](https://issues.apache.org/jira/browse/HBASE-21248) | Implement exponential backoff when retrying for ModifyPeerProcedure | Major | proc-v2, Replication |
| [HBASE-21196](https://issues.apache.org/jira/browse/HBASE-21196) | HTableMultiplexer clears the meta cache after every put operation | Critical | Performance |
| [HBASE-19418](https://issues.apache.org/jira/browse/HBASE-19418) | RANGE\_OF\_DELAY in PeriodicMemstoreFlusher should be configurable. | Minor | . |
| [HBASE-18451](https://issues.apache.org/jira/browse/HBASE-18451) | PeriodicMemstoreFlusher should inspect the queue before adding a delayed flush request | Major | regionserver |
| [HBASE-21228](https://issues.apache.org/jira/browse/HBASE-21228) | Memory leak since AbstractFSWAL caches Thread object and never clean later | Critical | wal |
| [HBASE-20766](https://issues.apache.org/jira/browse/HBASE-20766) | Verify Replication Tool Has Typo "remove cluster" | Trivial | . |
| [HBASE-21232](https://issues.apache.org/jira/browse/HBASE-21232) | Show table state in Tables view on Master home page | Major | Operability, UI |
| [HBASE-21212](https://issues.apache.org/jira/browse/HBASE-21212) | Wrong flush time when update flush metric | Minor | . |
| [HBASE-21208](https://issues.apache.org/jira/browse/HBASE-21208) | Bytes#toShort doesn't work without unsafe | Critical | . |
| [HBASE-20704](https://issues.apache.org/jira/browse/HBASE-20704) | Sometimes some compacted storefiles are not archived on region close | Critical | Compaction |
| [HBASE-21203](https://issues.apache.org/jira/browse/HBASE-21203) | TestZKMainServer#testCommandLineWorks won't pass with default 4lw whitelist | Minor | test, Zookeeper |
| [HBASE-21102](https://issues.apache.org/jira/browse/HBASE-21102) | ServerCrashProcedure should select target server where no other replicas exist for the current region | Major | Region Assignment |
| [HBASE-21206](https://issues.apache.org/jira/browse/HBASE-21206) | Scan with batch size may return incomplete cells | Critical | Scanners |
| [HBASE-21182](https://issues.apache.org/jira/browse/HBASE-21182) | Failed to execute start-hbase.sh | Major | . |
| [HBASE-21179](https://issues.apache.org/jira/browse/HBASE-21179) | Fix the number of actions in responseTooSlow log | Major | logging, rpc |
| [HBASE-21174](https://issues.apache.org/jira/browse/HBASE-21174) | [REST] Failed to parse empty qualifier in TableResource#getScanResource | Major | REST |
| [HBASE-21181](https://issues.apache.org/jira/browse/HBASE-21181) | Use the same filesystem for wal archive directory and wal directory | Major | . |
| [HBASE-21021](https://issues.apache.org/jira/browse/HBASE-21021) | Result returned by Append operation should be ordered | Major | . |
| [HBASE-21173](https://issues.apache.org/jira/browse/HBASE-21173) | Remove the duplicate HRegion#close in TestHRegion | Minor | test |
| [HBASE-21144](https://issues.apache.org/jira/browse/HBASE-21144) | AssignmentManager.waitForAssignment is not stable | Major | amv2, test |
| [HBASE-21143](https://issues.apache.org/jira/browse/HBASE-21143) | Update findbugs-maven-plugin to 3.0.4 | Major | pom |
| [HBASE-21171](https://issues.apache.org/jira/browse/HBASE-21171) | [amv2] Tool to parse a directory of MasterProcWALs standalone | Major | amv2, test |
| [HBASE-21052](https://issues.apache.org/jira/browse/HBASE-21052) | After restoring a snapshot, table.jsp page for the table gets stuck | Major | snapshots |
| [HBASE-21001](https://issues.apache.org/jira/browse/HBASE-21001) | ReplicationObserver fails to load in HBase 2.0.0 | Major | . |
| [HBASE-20741](https://issues.apache.org/jira/browse/HBASE-20741) | Split of a region with replicas creates all daughter regions and its replica in same server | Major | read replicas |
| [HBASE-21127](https://issues.apache.org/jira/browse/HBASE-21127) | TableRecordReader need to handle cursor result too | Major | . |
| [HBASE-20892](https://issues.apache.org/jira/browse/HBASE-20892) | [UI] Start / End keys are empty on table.jsp | Major | . |
| [HBASE-21136](https://issues.apache.org/jira/browse/HBASE-21136) | NPE in MetricsTableSourceImpl.updateFlushTime | Major | metrics |
| [HBASE-21132](https://issues.apache.org/jira/browse/HBASE-21132) | return wrong result in rest multiget | Major | . |
| [HBASE-21128](https://issues.apache.org/jira/browse/HBASE-21128) | TestAsyncRegionAdminApi.testAssignRegionAndUnassignRegion is broken | Major | test |
| [HBASE-20940](https://issues.apache.org/jira/browse/HBASE-20940) | HStore.cansplit should not allow split to happen if it has references | Major | . |
| [HBASE-21084](https://issues.apache.org/jira/browse/HBASE-21084) | When cloning a snapshot including a split parent region, the split parent region of the cloned table will be online | Major | snapshots |
| [HBASE-20968](https://issues.apache.org/jira/browse/HBASE-20968) | list\_procedures\_test fails due to no matching regex | Major | shell, test |
| [HBASE-21030](https://issues.apache.org/jira/browse/HBASE-21030) | Correct javadoc for append operation | Minor | documentation |
| [HBASE-21088](https://issues.apache.org/jira/browse/HBASE-21088) | HStoreFile should be closed in HStore#hasReferences | Major | . |
| [HBASE-20890](https://issues.apache.org/jira/browse/HBASE-20890) | PE filterScan seems to be stuck forever | Minor | . |
| [HBASE-20772](https://issues.apache.org/jira/browse/HBASE-20772) | Controlled shutdown fills Master log with the disturbing message "No matching procedure found for rit=OPEN, location=ZZZZ, table=YYYYY, region=XXXX transition to CLOSED | Major | logging |
| [HBASE-20978](https://issues.apache.org/jira/browse/HBASE-20978) | [amv2] Worker terminating UNNATURALLY during MoveRegionProcedure | Critical | amv2 |
| [HBASE-21078](https://issues.apache.org/jira/browse/HBASE-21078) | [amv2] CODE-BUG NPE in RTP doing Unassign | Major | amv2 |
| [HBASE-21113](https://issues.apache.org/jira/browse/HBASE-21113) | Apply the branch-2 version of HBASE-21095, The timeout retry logic for several procedures are broken after master restarts | Major | amv2 |
| [HBASE-21101](https://issues.apache.org/jira/browse/HBASE-21101) | Remove the waitUntilAllRegionsAssigned call after split in TestTruncateTableProcedure | Major | test |
| [HBASE-19008](https://issues.apache.org/jira/browse/HBASE-19008) | Add missing equals or hashCode method(s) to stock Filter implementations | Major | . |
| [HBASE-20614](https://issues.apache.org/jira/browse/HBASE-20614) | REST scan API with incorrect filter text file throws HTTP 503 Service Unavailable error | Minor | REST |
| [HBASE-21041](https://issues.apache.org/jira/browse/HBASE-21041) | Memstore's heap size will be decreased to minus zero after flush | Major | . |
| [HBASE-21031](https://issues.apache.org/jira/browse/HBASE-21031) | Memory leak if replay edits failed during region opening | Major | . |
| [HBASE-20666](https://issues.apache.org/jira/browse/HBASE-20666) | Unsuccessful table creation leaves entry in hbase:rsgroup table | Minor | . |
| [HBASE-21032](https://issues.apache.org/jira/browse/HBASE-21032) | ScanResponses contain only one cell each | Major | Performance, Scanners |
| [HBASE-20705](https://issues.apache.org/jira/browse/HBASE-20705) | Having RPC Quota on a table prevents Space quota to be recreated/removed | Major | . |
| [HBASE-21058](https://issues.apache.org/jira/browse/HBASE-21058) | Nightly tests for branches 1 fail to build ref guide | Major | documentation |
| [HBASE-21074](https://issues.apache.org/jira/browse/HBASE-21074) | JDK7 branches need to pass "-Dhttps.protocols=TLSv1.2" to maven when building | Major | build, community, test |
| [HBASE-21062](https://issues.apache.org/jira/browse/HBASE-21062) | WALFactory has misleading notion of "default" | Major | wal |
| [HBASE-21047](https://issues.apache.org/jira/browse/HBASE-21047) | Object creation of StoreFileScanner thru constructor and close may leave refCount to -1 | Major | . |
| [HBASE-21005](https://issues.apache.org/jira/browse/HBASE-21005) | Maven site configuration causes downstream projects to get a directory named ${project.basedir} | Minor | build |
| [HBASE-21007](https://issues.apache.org/jira/browse/HBASE-21007) | Memory leak in HBase rest server | Critical | REST |
| [HBASE-20794](https://issues.apache.org/jira/browse/HBASE-20794) | CreateTable operation does not log its landing at the master nor the initiator at INFO level | Major | logging |
| [HBASE-20538](https://issues.apache.org/jira/browse/HBASE-20538) | Upgrade our hadoop versions to 2.7.7 and 3.0.3 | Critical | java, security |
| [HBASE-20927](https://issues.apache.org/jira/browse/HBASE-20927) | RSGroupAdminEndpoint doesn't handle clearing dead servers if they are not processed yet. | Major | . |
| [HBASE-20932](https://issues.apache.org/jira/browse/HBASE-20932) | Effective MemStoreSize::hashCode() | Major | . |
| [HBASE-20928](https://issues.apache.org/jira/browse/HBASE-20928) | Rewrite calculation of midpoint in binarySearch functions to prevent overflow | Minor | io |
| [HBASE-20565](https://issues.apache.org/jira/browse/HBASE-20565) | ColumnRangeFilter combined with ColumnPaginationFilter can produce incorrect result since 1.4 | Major | Filters |
| [HBASE-20908](https://issues.apache.org/jira/browse/HBASE-20908) | Infinite loop on regionserver if region replica are reduced | Major | read replicas |
| [HBASE-19893](https://issues.apache.org/jira/browse/HBASE-19893) | restore\_snapshot is broken in master branch when region splits | Critical | snapshots |
| [HBASE-20870](https://issues.apache.org/jira/browse/HBASE-20870) | Wrong HBase root dir in ITBLL's Search Tool | Minor | integration tests |
| [HBASE-20901](https://issues.apache.org/jira/browse/HBASE-20901) | Reducing region replica has no effect | Major | . |
| [HBASE-6028](https://issues.apache.org/jira/browse/HBASE-6028) | Implement a cancel for in-progress compactions | Minor | regionserver |
| [HBASE-20869](https://issues.apache.org/jira/browse/HBASE-20869) | Endpoint-based Export use incorrect user to write to destination | Major | Coprocessors |
| [HBASE-20879](https://issues.apache.org/jira/browse/HBASE-20879) | Compacting memstore config should handle lower case | Major | . |
| [HBASE-20865](https://issues.apache.org/jira/browse/HBASE-20865) | CreateTableProcedure is stuck in retry loop in CREATE\_TABLE\_WRITE\_FS\_LAYOUT state | Major | amv2 |
| [HBASE-19572](https://issues.apache.org/jira/browse/HBASE-19572) | RegionMover should use the configured default port number and not the one from HConstants | Major | . |
| [HBASE-20697](https://issues.apache.org/jira/browse/HBASE-20697) | Can't cache All region locations of the specify table by calling table.getRegionLocator().getAllRegionLocations() | Major | meta |
| [HBASE-20791](https://issues.apache.org/jira/browse/HBASE-20791) | RSGroupBasedLoadBalancer#setClusterMetrics should pass ClusterMetrics to its internalBalancer | Major | Balancer, rsgroup |
| [HBASE-20770](https://issues.apache.org/jira/browse/HBASE-20770) | WAL cleaner logs way too much; gets clogged when lots of work to do | Critical | logging |
### TESTS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-21963](https://issues.apache.org/jira/browse/HBASE-21963) | Add a script for building and verifying release candidate | Minor | community, scripts |
| [HBASE-21756](https://issues.apache.org/jira/browse/HBASE-21756) | Backport HBASE-21279 (Split TestAdminShell into several tests) to branch-2 | Major | . |
| [HBASE-20136](https://issues.apache.org/jira/browse/HBASE-20136) | TestKeyValue misses ClassRule and Category annotations | Minor | . |
| [HBASE-21261](https://issues.apache.org/jira/browse/HBASE-21261) | Add log4j.properties for hbase-rsgroup tests | Trivial | . |
| [HBASE-21258](https://issues.apache.org/jira/browse/HBASE-21258) | Add resetting of flags for RS Group pre/post hooks in TestRSGroups | Major | . |
| [HBASE-21097](https://issues.apache.org/jira/browse/HBASE-21097) | Flush pressure assertion may fail in testFlushThroughputTuning | Major | regionserver |
| [HBASE-21138](https://issues.apache.org/jira/browse/HBASE-21138) | Close HRegion instance at the end of every test in TestHRegion | Major | . |
| [HBASE-21161](https://issues.apache.org/jira/browse/HBASE-21161) | Enable the test added in HBASE-20741 that was removed accidentally | Minor | . |
| [HBASE-21076](https://issues.apache.org/jira/browse/HBASE-21076) | TestTableResource fails with NPE | Major | REST, test |
| [HBASE-20907](https://issues.apache.org/jira/browse/HBASE-20907) | Fix Intermittent failure on TestProcedurePriority | Major | . |
| [HBASE-20838](https://issues.apache.org/jira/browse/HBASE-20838) | Include hbase-server in precommit test if CommonFSUtils is changed | Major | . |
### SUB-TASKS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-21970](https://issues.apache.org/jira/browse/HBASE-21970) | Document that how to upgrade from 2.0 or 2.1 to 2.2+ | Major | . |
| [HBASE-22357](https://issues.apache.org/jira/browse/HBASE-22357) | Fix remaining Checkstyle issues in hbase-replication | Trivial | Replication |
| [HBASE-22554](https://issues.apache.org/jira/browse/HBASE-22554) | Upgrade to surefire 2.22.2 | Major | test |
| [HBASE-22500](https://issues.apache.org/jira/browse/HBASE-22500) | Modify pom and jenkins jobs for hadoop versions | Blocker | build, hadoop2, hadoop3 |
| [HBASE-22316](https://issues.apache.org/jira/browse/HBASE-22316) | Record the stack trace for current thread in FutureUtils.get | Major | asyncclient, Client |
| [HBASE-22326](https://issues.apache.org/jira/browse/HBASE-22326) | Fix Checkstyle errors in hbase-examples | Minor | . |
| [HBASE-22327](https://issues.apache.org/jira/browse/HBASE-22327) | Fix remaining Checkstyle issues in hbase-hadoop-compat | Trivial | . |
| [HBASE-22478](https://issues.apache.org/jira/browse/HBASE-22478) | Add jackson dependency for hbase-http module | Major | build, dependencies |
| [HBASE-22445](https://issues.apache.org/jira/browse/HBASE-22445) | Add file info when throw exceptions in HFileReaderImpl | Major | . |
| [HBASE-22447](https://issues.apache.org/jira/browse/HBASE-22447) | Check refCount before free block in BucketCache | Major | BucketCache |
| [HBASE-22400](https://issues.apache.org/jira/browse/HBASE-22400) | Remove the adapter code in async fs implementation for hadoop-2.7.x | Major | wal |
| [HBASE-22430](https://issues.apache.org/jira/browse/HBASE-22430) | hbase-vote should tee build and test output to console | Trivial | . |
| [HBASE-22429](https://issues.apache.org/jira/browse/HBASE-22429) | hbase-vote download step requires URL to end with '/' | Trivial | . |
| [HBASE-22405](https://issues.apache.org/jira/browse/HBASE-22405) | Update Ref Guide for EOL of Hadoop 2.7 | Major | community, documentation |
| [HBASE-22325](https://issues.apache.org/jira/browse/HBASE-22325) | AsyncRpcRetryingCaller will not schedule retry if we hit a NotServingRegionException but there is no TableName provided | Major | asyncclient, Client |
| [HBASE-22322](https://issues.apache.org/jira/browse/HBASE-22322) | Use special pause for CallQueueTooBigException | Major | asyncclient, Client |
| [HBASE-22317](https://issues.apache.org/jira/browse/HBASE-22317) | Support reading from meta replicas | Major | asyncclient, read replicas |
| [HBASE-22261](https://issues.apache.org/jira/browse/HBASE-22261) | Make use of ClusterStatusListener for async client | Major | asyncclient |
| [HBASE-22267](https://issues.apache.org/jira/browse/HBASE-22267) | Implement client push back for async client | Major | asyncclient |
| [HBASE-19763](https://issues.apache.org/jira/browse/HBASE-19763) | Fix Checkstyle errors in hbase-procedure | Minor | . |
| [HBASE-22244](https://issues.apache.org/jira/browse/HBASE-22244) | Make use of MetricsConnection in async client | Major | asyncclient, metrics |
| [HBASE-22196](https://issues.apache.org/jira/browse/HBASE-22196) | Split TestRestartCluster | Major | test |
| [HBASE-22117](https://issues.apache.org/jira/browse/HBASE-22117) | Move hasPermission/checkPermissions from region server to master | Major | . |
| [HBASE-21886](https://issues.apache.org/jira/browse/HBASE-21886) | Run ITBLL for branch-2.2 | Major | . |
| [HBASE-22155](https://issues.apache.org/jira/browse/HBASE-22155) | Move 2.2.0 on to hbase-thirdparty-2.2.0 | Major | thirdparty |
| [HBASE-22153](https://issues.apache.org/jira/browse/HBASE-22153) | Fix the flaky TestRestartCluster | Major | test |
| [HBASE-22152](https://issues.apache.org/jira/browse/HBASE-22152) | Create a jenkins file for yetus to processing GitHub PR | Major | build |
| [HBASE-22158](https://issues.apache.org/jira/browse/HBASE-22158) | RawAsyncHBaseAdmin.getTableSplits should filter out none default replicas | Major | Admin |
| [HBASE-22157](https://issues.apache.org/jira/browse/HBASE-22157) | Include the cause when constructing RestoreSnapshotException in restoreSnapshot | Major | Admin |
| [HBASE-22141](https://issues.apache.org/jira/browse/HBASE-22141) | Fix TestAsyncDecommissionAdminApi | Major | test |
| [HBASE-22135](https://issues.apache.org/jira/browse/HBASE-22135) | AsyncAdmin will not refresh master address | Major | Admin, asyncclient, Client |
| [HBASE-22101](https://issues.apache.org/jira/browse/HBASE-22101) | AsyncAdmin.isTableAvailable should not throw TableNotFoundException | Major | Admin, asyncclient, Client |
| [HBASE-22094](https://issues.apache.org/jira/browse/HBASE-22094) | Throw TableNotFoundException if table not exists in AsyncAdmin.compact | Major | Admin |
| [HBASE-21911](https://issues.apache.org/jira/browse/HBASE-21911) | Move getUserPermissions from regionserver to master | Major | . |
| [HBASE-22015](https://issues.apache.org/jira/browse/HBASE-22015) | UserPermission should be annotated as InterfaceAudience.Public | Blocker | . |
| [HBASE-22066](https://issues.apache.org/jira/browse/HBASE-22066) | Add markers to CHANGES.md and RELEASENOTES.md | Major | . |
| [HBASE-22040](https://issues.apache.org/jira/browse/HBASE-22040) | Add mergeRegionsAsync with a List of region names method in AsyncAdmin | Major | Admin, asyncclient, Client |
| [HBASE-22039](https://issues.apache.org/jira/browse/HBASE-22039) | Should add the synchronous parameter for the XXXSwitch method in AsyncAdmin | Major | Admin, asyncclient, Client |
| [HBASE-22022](https://issues.apache.org/jira/browse/HBASE-22022) | nightly fails rat check down in the dev-support/hbase\_nightly\_source-artifact.sh check | Major | . |
| [HBASE-22025](https://issues.apache.org/jira/browse/HBASE-22025) | RAT check fails in nightlies; fails on (old) test data files. | Major | . |
| [HBASE-21977](https://issues.apache.org/jira/browse/HBASE-21977) | Skip replay WAL and update seqid when open regions restored from snapshot | Major | Region Assignment, snapshots |
| [HBASE-21999](https://issues.apache.org/jira/browse/HBASE-21999) | [DEBUG] Exit if git returns empty revision! | Major | build |
| [HBASE-22000](https://issues.apache.org/jira/browse/HBASE-22000) | Deprecated isTableAvailable with splitKeys | Major | asyncclient, Client |
| [HBASE-21949](https://issues.apache.org/jira/browse/HBASE-21949) | Fix flaky test TestHBaseTestingUtility.testMiniZooKeeperWithMultipleClientPorts | Major | . |
| [HBASE-21993](https://issues.apache.org/jira/browse/HBASE-21993) | Set version as 2.2.0 in branch-2.2 in prep for first RC | Major | . |
| [HBASE-21997](https://issues.apache.org/jira/browse/HBASE-21997) | Fix hbase-rest findbugs ST\_WRITE\_TO\_STATIC\_FROM\_INSTANCE\_METHOD complaint | Major | REST |
| [HBASE-21986](https://issues.apache.org/jira/browse/HBASE-21986) | Generate CHANGES.md and RELEASENOTES.md for 2.2.0 | Major | . |
| [HBASE-21972](https://issues.apache.org/jira/browse/HBASE-21972) | Copy master doc into branch-2.2 and edit to make it suit 2.2.0 | Major | . |
| [HBASE-15728](https://issues.apache.org/jira/browse/HBASE-15728) | Add remaining per-table region / store / flush / compaction related metrics | Major | metrics |
| [HBASE-21934](https://issues.apache.org/jira/browse/HBASE-21934) | RemoteProcedureDispatcher should track the ongoing dispatched calls | Blocker | proc-v2 |
| [HBASE-21588](https://issues.apache.org/jira/browse/HBASE-21588) | Procedure v2 wal splitting implementation | Major | . |
| [HBASE-21729](https://issues.apache.org/jira/browse/HBASE-21729) | Extract ProcedureCoordinatorRpcs and ProcedureMemberRpcs from CoordinatedStateManager | Major | . |
| [HBASE-21094](https://issues.apache.org/jira/browse/HBASE-21094) | Remove the explicit timeout config for TestTruncateTableProcedure | Major | test |
| [HBASE-21093](https://issues.apache.org/jira/browse/HBASE-21093) | Move TestCreateTableProcedure.testMRegions to a separated file | Major | test |
| [HBASE-18201](https://issues.apache.org/jira/browse/HBASE-18201) | add UT and docs for DataBlockEncodingTool | Minor | tooling |
| [HBASE-21978](https://issues.apache.org/jira/browse/HBASE-21978) | Should close AsyncRegistry if we fail to get cluster id when creating AsyncConnection | Major | asyncclient, Client |
| [HBASE-21974](https://issues.apache.org/jira/browse/HBASE-21974) | Change Admin#grant/revoke parameter from UserPermission to user and Permission | Major | . |
| [HBASE-21976](https://issues.apache.org/jira/browse/HBASE-21976) | Deal with RetryImmediatelyException for batching request | Major | asyncclient, Client |
| [HBASE-21820](https://issues.apache.org/jira/browse/HBASE-21820) | Implement CLUSTER quota scope | Major | . |
| [HBASE-21962](https://issues.apache.org/jira/browse/HBASE-21962) | Filters do not work in ThriftTable | Major | Thrift |
| [HBASE-21927](https://issues.apache.org/jira/browse/HBASE-21927) | Always fail the locate request when error occur | Major | asyncclient, Client |
| [HBASE-21944](https://issues.apache.org/jira/browse/HBASE-21944) | Validate put for batch operation | Major | asyncclient, Client |
| [HBASE-21945](https://issues.apache.org/jira/browse/HBASE-21945) | Maintain the original order when sending batch request | Major | asyncclient, Client |
| [HBASE-21783](https://issues.apache.org/jira/browse/HBASE-21783) | Support exceed user/table/ns throttle quota if region server has available quota | Major | . |
| [HBASE-21930](https://issues.apache.org/jira/browse/HBASE-21930) | Deal with ScannerResetException when opening region scanner | Major | asyncclient, Client |
| [HBASE-21907](https://issues.apache.org/jira/browse/HBASE-21907) | Should set priority for rpc request | Major | asyncclient, Client |
| [HBASE-21909](https://issues.apache.org/jira/browse/HBASE-21909) | Validate the put instance before executing in AsyncTable.put method | Major | asyncclient, Client |
| [HBASE-21814](https://issues.apache.org/jira/browse/HBASE-21814) | Remove the TODO in AccessControlLists#addUserPermission | Major | . |
| [HBASE-19889](https://issues.apache.org/jira/browse/HBASE-19889) | Revert Workaround: Purge User API building from branch-2 so can make a beta-1 | Major | website |
| [HBASE-21838](https://issues.apache.org/jira/browse/HBASE-21838) | Create a special ReplicationEndpoint just for verifying the WAL entries are fine | Major | Replication, wal |
| [HBASE-21829](https://issues.apache.org/jira/browse/HBASE-21829) | Use FutureUtils.addListener instead of calling whenComplete directly | Major | asyncclient, Client |
| [HBASE-21828](https://issues.apache.org/jira/browse/HBASE-21828) | Make sure we do not return CompletionException when locating region | Major | asyncclient, Client |
| [HBASE-21764](https://issues.apache.org/jira/browse/HBASE-21764) | Size of in-memory compaction thread pool should be configurable | Major | Compaction, in-memory-compaction |
| [HBASE-21809](https://issues.apache.org/jira/browse/HBASE-21809) | Add retry thrift client for ThriftTable/Admin | Major | . |
| [HBASE-21739](https://issues.apache.org/jira/browse/HBASE-21739) | Move grant/revoke from regionserver to master | Major | . |
| [HBASE-21798](https://issues.apache.org/jira/browse/HBASE-21798) | Cut branch-2.2 | Major | . |
| [HBASE-20542](https://issues.apache.org/jira/browse/HBASE-20542) | Better heap utilization for IMC with MSLABs | Major | in-memory-compaction |
| [HBASE-21713](https://issues.apache.org/jira/browse/HBASE-21713) | Support set region server throttle quota | Major | . |
| [HBASE-21761](https://issues.apache.org/jira/browse/HBASE-21761) | Align the methods in RegionLocator and AsyncTableRegionLocator | Major | asyncclient, Client |
| [HBASE-17370](https://issues.apache.org/jira/browse/HBASE-17370) | Fix or provide shell scripts to drain and decommission region server | Major | . |
| [HBASE-21750](https://issues.apache.org/jira/browse/HBASE-21750) | Most of KeyValueUtil#length can be replaced by cell#getSerializedSize for better performance because the latter one has been optimized | Major | . |
| [HBASE-21734](https://issues.apache.org/jira/browse/HBASE-21734) | Some optimization in FilterListWithOR | Major | . |
| [HBASE-21738](https://issues.apache.org/jira/browse/HBASE-21738) | Remove all the CSLM#size operation in our memstore because it's an quite time consuming. | Critical | Performance |
| [HBASE-21034](https://issues.apache.org/jira/browse/HBASE-21034) | Add new throttle type: read/write capacity unit | Major | . |
| [HBASE-21726](https://issues.apache.org/jira/browse/HBASE-21726) | Add getAllRegionLocations method to AsyncTableRegionLocator | Major | asyncclient, Client |
| [HBASE-19695](https://issues.apache.org/jira/browse/HBASE-19695) | Handle disabled table for async client | Major | asyncclient, Client |
| [HBASE-21711](https://issues.apache.org/jira/browse/HBASE-21711) | Remove references to git.apache.org/hbase.git | Critical | . |
| [HBASE-21647](https://issues.apache.org/jira/browse/HBASE-21647) | Add status track for splitting WAL tasks | Major | Operability |
| [HBASE-21705](https://issues.apache.org/jira/browse/HBASE-21705) | Should treat meta table specially for some methods in AsyncAdmin | Major | Admin, asyncclient, Client |
| [HBASE-21663](https://issues.apache.org/jira/browse/HBASE-21663) | Add replica scan support | Major | asyncclient, Client, read replicas |
| [HBASE-21580](https://issues.apache.org/jira/browse/HBASE-21580) | Support getting Hbck instance from AsyncConnection | Major | asyncclient, Client, hbck2 |
| [HBASE-21652](https://issues.apache.org/jira/browse/HBASE-21652) | Refactor ThriftServer making thrift2 server inherited from thrift1 server | Major | . |
| [HBASE-21661](https://issues.apache.org/jira/browse/HBASE-21661) | Provide Thrift2 implementation of Table/Admin | Major | . |
| [HBASE-21682](https://issues.apache.org/jira/browse/HBASE-21682) | Support getting from specific replica | Major | read replicas |
| [HBASE-21159](https://issues.apache.org/jira/browse/HBASE-21159) | Add shell command to switch throttle on or off | Major | . |
| [HBASE-21362](https://issues.apache.org/jira/browse/HBASE-21362) | Disable printing of stack-trace in shell when quotas are violated | Minor | shell |
| [HBASE-21361](https://issues.apache.org/jira/browse/HBASE-21361) | Disable printing of stack-trace in shell when quotas are not enabled | Minor | shell |
| [HBASE-17356](https://issues.apache.org/jira/browse/HBASE-17356) | Add replica get support | Major | Client |
| [HBASE-21650](https://issues.apache.org/jira/browse/HBASE-21650) | Add DDL operation and some other miscellaneous to thrift2 | Major | Thrift |
| [HBASE-21401](https://issues.apache.org/jira/browse/HBASE-21401) | Sanity check when constructing the KeyValue | Critical | regionserver |
| [HBASE-21578](https://issues.apache.org/jira/browse/HBASE-21578) | Fix wrong throttling exception for capacity unit | Major | . |
| [HBASE-21570](https://issues.apache.org/jira/browse/HBASE-21570) | Add write buffer periodic flush support for AsyncBufferedMutator | Major | asyncclient, Client |
| [HBASE-21465](https://issues.apache.org/jira/browse/HBASE-21465) | Retry on reportRegionStateTransition can lead to unexpected errors | Major | amv2 |
| [HBASE-21508](https://issues.apache.org/jira/browse/HBASE-21508) | Ignore the reportRegionStateTransition call from a dead server | Major | amv2 |
| [HBASE-21490](https://issues.apache.org/jira/browse/HBASE-21490) | WALProcedure may remove proc wal files still with active procedures | Major | proc-v2 |
| [HBASE-21377](https://issues.apache.org/jira/browse/HBASE-21377) | Add debug log for procedure stack id related operations | Major | proc-v2 |
| [HBASE-21472](https://issues.apache.org/jira/browse/HBASE-21472) | Should not persist the dispatched field for RegionRemoteProcedureBase | Major | amv2 |
| [HBASE-21473](https://issues.apache.org/jira/browse/HBASE-21473) | RowIndexSeekerV1 may return cell with extra two \\x00\\x00 bytes which has no tags | Major | . |
| [HBASE-21463](https://issues.apache.org/jira/browse/HBASE-21463) | The checkOnlineRegionsReport can accidentally complete a TRSP | Critical | amv2 |
| [HBASE-21376](https://issues.apache.org/jira/browse/HBASE-21376) | Add some verbose log to MasterProcedureScheduler | Major | logging, proc-v2 |
| [HBASE-21443](https://issues.apache.org/jira/browse/HBASE-21443) | [hbase-connectors] Purge hbase-\* modules from core now they've been moved to hbase-connectors | Major | hbase-connectors, spark |
| [HBASE-21421](https://issues.apache.org/jira/browse/HBASE-21421) | Do not kill RS if reportOnlineRegions fails | Major | . |
| [HBASE-21314](https://issues.apache.org/jira/browse/HBASE-21314) | The implementation of BitSetNode is not efficient | Major | proc-v2 |
| [HBASE-21351](https://issues.apache.org/jira/browse/HBASE-21351) | The force update thread may have race with PE worker when the procedure is rolling back | Critical | proc-v2 |
| [HBASE-21191](https://issues.apache.org/jira/browse/HBASE-21191) | Add a holding-pattern if no assign for meta or namespace (Can happen if masterprocwals have been cleared). | Major | amv2 |
| [HBASE-21322](https://issues.apache.org/jira/browse/HBASE-21322) | Add a scheduleServerCrashProcedure() API to HbckService | Critical | hbck2 |
| [HBASE-21375](https://issues.apache.org/jira/browse/HBASE-21375) | Revisit the lock and queue implementation in MasterProcedureScheduler | Major | proc-v2 |
| [HBASE-20973](https://issues.apache.org/jira/browse/HBASE-20973) | ArrayIndexOutOfBoundsException when rolling back procedure | Critical | amv2 |
| [HBASE-21384](https://issues.apache.org/jira/browse/HBASE-21384) | Procedure with holdlock=false should not be restored lock when restarts | Blocker | . |
| [HBASE-21364](https://issues.apache.org/jira/browse/HBASE-21364) | Procedure holds the lock should put to front of the queue after restart | Blocker | . |
| [HBASE-21215](https://issues.apache.org/jira/browse/HBASE-21215) | Figure how to invoke hbck2; make it easy to find | Major | amv2, hbck2 |
| [HBASE-21372](https://issues.apache.org/jira/browse/HBASE-21372) | Set hbase.assignment.maximum.attempts to Long.MAX | Major | amv2 |
| [HBASE-21363](https://issues.apache.org/jira/browse/HBASE-21363) | Rewrite the buildingHoldCleanupTracker method in WALProcedureStore | Major | proc-v2 |
| [HBASE-21338](https://issues.apache.org/jira/browse/HBASE-21338) | [balancer] If balancer is an ill-fit for cluster size, it gives little indication | Major | Balancer, Operability |
| [HBASE-21192](https://issues.apache.org/jira/browse/HBASE-21192) | Add HOW-TO repair damaged AMv2. | Major | amv2 |
| [HBASE-21073](https://issues.apache.org/jira/browse/HBASE-21073) | "Maintenance mode" master | Major | amv2, hbck2, master |
| [HBASE-21354](https://issues.apache.org/jira/browse/HBASE-21354) | Procedure may be deleted improperly during master restarts resulting in 'Corrupt' | Major | . |
| [HBASE-21336](https://issues.apache.org/jira/browse/HBASE-21336) | Simplify the implementation of WALProcedureMap | Major | proc-v2 |
| [HBASE-21323](https://issues.apache.org/jira/browse/HBASE-21323) | Should not skip force updating for a sub procedure even if it has been finished | Major | proc-v2 |
| [HBASE-21269](https://issues.apache.org/jira/browse/HBASE-21269) | Forward-port to branch-2 " HBASE-21213 [hbck2] bypass leaves behind state in RegionStates when assign/unassign" | Major | amv2 |
| [HBASE-20716](https://issues.apache.org/jira/browse/HBASE-20716) | Unsafe access cleanup | Critical | Performance |
| [HBASE-21330](https://issues.apache.org/jira/browse/HBASE-21330) | ReopenTableRegionsProcedure will enter an infinite loop if we schedule a TRSP at the same time | Major | amv2 |
| [HBASE-21310](https://issues.apache.org/jira/browse/HBASE-21310) | Split TestCloneSnapshotFromClient | Major | test |
| [HBASE-21311](https://issues.apache.org/jira/browse/HBASE-21311) | Split TestRestoreSnapshotFromClient | Major | test |
| [HBASE-21315](https://issues.apache.org/jira/browse/HBASE-21315) | The getActiveMinProcId and getActiveMaxProcId of BitSetNode are incorrect if there are no active procedure | Major | . |
| [HBASE-21278](https://issues.apache.org/jira/browse/HBASE-21278) | Do not rollback successful sub procedures when rolling back a procedure | Critical | proc-v2 |
| [HBASE-21309](https://issues.apache.org/jira/browse/HBASE-21309) | Increase the waiting timeout for TestProcedurePriority | Major | test |
| [HBASE-21254](https://issues.apache.org/jira/browse/HBASE-21254) | Need to find a way to limit the number of proc wal files | Critical | proc-v2 |
| [HBASE-21250](https://issues.apache.org/jira/browse/HBASE-21250) | Refactor WALProcedureStore and add more comments for better understanding the implementation | Major | proc-v2 |
| [HBASE-19275](https://issues.apache.org/jira/browse/HBASE-19275) | TestSnapshotFileCache never worked properly | Major | . |
| [HBASE-21249](https://issues.apache.org/jira/browse/HBASE-21249) | Add jitter for ProcedureUtil.getBackoffTimeMs | Major | proc-v2 |
| [HBASE-21244](https://issues.apache.org/jira/browse/HBASE-21244) | Skip persistence when retrying for assignment related procedures | Major | amv2, Performance, proc-v2 |
| [HBASE-21233](https://issues.apache.org/jira/browse/HBASE-21233) | Allow the procedure implementation to skip persistence of the state after a execution | Major | Performance, proc-v2 |
| [HBASE-21227](https://issues.apache.org/jira/browse/HBASE-21227) | Implement exponential retrying backoff for Assign/UnassignRegionHandler introduced in HBASE-21217 | Major | amv2, regionserver |
| [HBASE-21217](https://issues.apache.org/jira/browse/HBASE-21217) | Revisit the executeProcedure method for open/close region | Critical | amv2, proc-v2 |
| [HBASE-21214](https://issues.apache.org/jira/browse/HBASE-21214) | [hbck2] setTableState just sets hbase:meta state, not in-memory state | Major | amv2, hbck2 |
| [HBASE-21023](https://issues.apache.org/jira/browse/HBASE-21023) | Add bypassProcedureToCompletion() API to HbckService | Major | hbck2 |
| [HBASE-21156](https://issues.apache.org/jira/browse/HBASE-21156) | [hbck2] Queue an assign of hbase:meta and bulk assign/unassign | Critical | hbck2 |
| [HBASE-21169](https://issues.apache.org/jira/browse/HBASE-21169) | Initiate hbck2 tool in hbase-operator-tools repo | Major | hbck2 |
| [HBASE-21172](https://issues.apache.org/jira/browse/HBASE-21172) | Reimplement the retry backoff logic for ReopenTableRegionsProcedure | Major | amv2, proc-v2 |
| [HBASE-21189](https://issues.apache.org/jira/browse/HBASE-21189) | flaky job should gather machine stats | Minor | test |
| [HBASE-21190](https://issues.apache.org/jira/browse/HBASE-21190) | Log files and count of entries in each as we load from the MasterProcWAL store | Major | amv2 |
| [HBASE-21083](https://issues.apache.org/jira/browse/HBASE-21083) | Introduce a mechanism to bypass the execution of a stuck procedure | Major | amv2 |
| [HBASE-21017](https://issues.apache.org/jira/browse/HBASE-21017) | Revisit the expected states for open/close | Major | amv2 |
| [HBASE-20941](https://issues.apache.org/jira/browse/HBASE-20941) | Create and implement HbckService in master | Major | . |
| [HBASE-21072](https://issues.apache.org/jira/browse/HBASE-21072) | Block out HBCK1 in hbase2 | Major | hbck |
| [HBASE-21095](https://issues.apache.org/jira/browse/HBASE-21095) | The timeout retry logic for several procedures are broken after master restarts | Critical | amv2, proc-v2 |
| [HBASE-20975](https://issues.apache.org/jira/browse/HBASE-20975) | Lock may not be taken or released while rolling back procedure | Major | amv2 |
| [HBASE-21025](https://issues.apache.org/jira/browse/HBASE-21025) | Add cache for TableStateManager | Major | . |
| [HBASE-21012](https://issues.apache.org/jira/browse/HBASE-21012) | Revert the change of serializing TimeRangeTracker | Critical | . |
| [HBASE-20813](https://issues.apache.org/jira/browse/HBASE-20813) | Remove RPC quotas when the associated table/Namespace is dropped off | Minor | . |
| [HBASE-20885](https://issues.apache.org/jira/browse/HBASE-20885) | Remove entry for RPC quota from hbase:quota when RPC quota is removed. | Minor | . |
| [HBASE-20893](https://issues.apache.org/jira/browse/HBASE-20893) | Data loss if splitting region while ServerCrashProcedure executing | Major | . |
| [HBASE-20950](https://issues.apache.org/jira/browse/HBASE-20950) | Helper method to configure secure DFS cluster for tests | Major | test |
| [HBASE-19369](https://issues.apache.org/jira/browse/HBASE-19369) | HBase Should use Builder Pattern to Create Log Files while using WAL on Erasure Coding | Major | . |
| [HBASE-20939](https://issues.apache.org/jira/browse/HBASE-20939) | There will be race when we call suspendIfNotReady and then throw ProcedureSuspendedException | Critical | amv2 |
| [HBASE-20921](https://issues.apache.org/jira/browse/HBASE-20921) | Possible NPE in ReopenTableRegionsProcedure | Major | amv2 |
| [HBASE-20867](https://issues.apache.org/jira/browse/HBASE-20867) | RS may get killed while master restarts | Major | . |
| [HBASE-20878](https://issues.apache.org/jira/browse/HBASE-20878) | Data loss if merging regions while ServerCrashProcedure executing | Critical | amv2 |
| [HBASE-20846](https://issues.apache.org/jira/browse/HBASE-20846) | Restore procedure locks when master restarts | Major | . |
| [HBASE-20914](https://issues.apache.org/jira/browse/HBASE-20914) | Trim Master memory usage | Major | Balancer, master |
| [HBASE-20853](https://issues.apache.org/jira/browse/HBASE-20853) | Polish "Add defaults to Table Interface so Implementors don't have to" | Major | API |
| [HBASE-20875](https://issues.apache.org/jira/browse/HBASE-20875) | MemStoreLABImp::copyIntoCell uses 7% CPU when writing | Major | Performance |
| [HBASE-20860](https://issues.apache.org/jira/browse/HBASE-20860) | Merged region's RIT state may not be cleaned after master restart | Major | . |
| [HBASE-20847](https://issues.apache.org/jira/browse/HBASE-20847) | The parent procedure of RegionTransitionProcedure may not have the table lock | Major | proc-v2, Region Assignment |
| [HBASE-20776](https://issues.apache.org/jira/browse/HBASE-20776) | Update branch-2 version to 2.2.0-SNAPSHOT | Major | build |
### OTHER:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-21612](https://issues.apache.org/jira/browse/HBASE-21612) | Add developer debug options in HBase Config for REST server | Minor | Operability, REST, scripts |
| [HBASE-18735](https://issues.apache.org/jira/browse/HBASE-18735) | Provide a fast mechanism for shutting down mini cluster | Major | . |
| [HBASE-21489](https://issues.apache.org/jira/browse/HBASE-21489) | TestShell is broken | Major | shell |
| [HBASE-20152](https://issues.apache.org/jira/browse/HBASE-20152) | [AMv2] DisableTableProcedure versus ServerCrashProcedure | Major | amv2 |
| [HBASE-20540](https://issues.apache.org/jira/browse/HBASE-20540) | [umbrella] Hadoop 3 compatibility | Major | . |
| [HBASE-21536](https://issues.apache.org/jira/browse/HBASE-21536) | Fix completebulkload usage instructions | Trivial | documentation, mapreduce |
| [HBASE-22449](https://issues.apache.org/jira/browse/HBASE-22449) | https everywhere in Maven metadata | Minor | . |
| [HBASE-22406](https://issues.apache.org/jira/browse/HBASE-22406) | skip generating rdoc when building gems in our docker image for running yetus | Critical | build, test |
| [HBASE-22375](https://issues.apache.org/jira/browse/HBASE-22375) | Promote AccessChecker to LimitedPrivate(Coprocessor) | Minor | Coprocessors, security |
| [HBASE-21714](https://issues.apache.org/jira/browse/HBASE-21714) | Deprecated isTableAvailableWithSplit method in thrift module | Major | Thrift |
| [HBASE-22359](https://issues.apache.org/jira/browse/HBASE-22359) | Backport of HBASE-21371 misses activation-api license information | Minor | build, community |
| [HBASE-22174](https://issues.apache.org/jira/browse/HBASE-22174) | Remove error prone from our precommit javac check | Major | build |
| [HBASE-22231](https://issues.apache.org/jira/browse/HBASE-22231) | Remove unused and \* imports | Minor | . |
| [HBASE-22304](https://issues.apache.org/jira/browse/HBASE-22304) | Fix remaining Checkstyle issues in hbase-endpoint | Trivial | . |
| [HBASE-22020](https://issues.apache.org/jira/browse/HBASE-22020) | upgrade to yetus 0.9.0 | Major | build, community |
| [HBASE-22187](https://issues.apache.org/jira/browse/HBASE-22187) | Remove usage of deprecated ClusterConnection.clearRegionCache | Trivial | Client |
| [HBASE-22203](https://issues.apache.org/jira/browse/HBASE-22203) | Reformat DemoClient.java | Trivial | . |
| [HBASE-22189](https://issues.apache.org/jira/browse/HBASE-22189) | Remove usage of StoreFile.getModificationTimeStamp | Trivial | . |
| [HBASE-22108](https://issues.apache.org/jira/browse/HBASE-22108) | Avoid passing null in Admin methods | Major | Admin |
| [HBASE-22007](https://issues.apache.org/jira/browse/HBASE-22007) | Add restoreSnapshot and cloneSnapshot with acl methods in AsyncAdmin | Major | Admin, asyncclient, Client |
| [HBASE-22131](https://issues.apache.org/jira/browse/HBASE-22131) | Delete the patches in hbase-protocol-shaded module | Major | build, Protobufs |
| [HBASE-22099](https://issues.apache.org/jira/browse/HBASE-22099) | Backport HBASE-21895 "Error prone upgrade" to branch-2 | Major | build |
| [HBASE-22052](https://issues.apache.org/jira/browse/HBASE-22052) | pom cleaning; filter out jersey-core in hadoop2 to match hadoop3 and remove redunant version specifications | Major | . |
| [HBASE-22065](https://issues.apache.org/jira/browse/HBASE-22065) | Add listTableDescriptors(List\<TableName\>) method in AsyncAdmin | Major | Admin |
| [HBASE-22042](https://issues.apache.org/jira/browse/HBASE-22042) | Missing @Override annotation for RawAsyncTableImpl.scan | Major | asyncclient, Client |
| [HBASE-21057](https://issues.apache.org/jira/browse/HBASE-21057) | upgrade to latest spotbugs | Minor | community, test |
| [HBASE-21888](https://issues.apache.org/jira/browse/HBASE-21888) | Add a isClosed method to AsyncConnection | Major | asyncclient, Client |
| [HBASE-21884](https://issues.apache.org/jira/browse/HBASE-21884) | Fix box/unbox findbugs warning in secure bulk load | Minor | . |
| [HBASE-21859](https://issues.apache.org/jira/browse/HBASE-21859) | Add clearRegionLocationCache method for AsyncConnection | Major | asyncclient, Client |
| [HBASE-21853](https://issues.apache.org/jira/browse/HBASE-21853) | update copyright notices to 2019 | Major | documentation |
| [HBASE-21791](https://issues.apache.org/jira/browse/HBASE-21791) | Upgrade thrift dependency to 0.12.0 | Blocker | Thrift |
| [HBASE-21710](https://issues.apache.org/jira/browse/HBASE-21710) | Add quota related methods to the Admin interface | Major | . |
| [HBASE-21782](https://issues.apache.org/jira/browse/HBASE-21782) | LoadIncrementalHFiles should not be IA.Public | Major | mapreduce |
| [HBASE-21762](https://issues.apache.org/jira/browse/HBASE-21762) | Move some methods in ClusterConnection to Connection | Major | Client |
| [HBASE-21715](https://issues.apache.org/jira/browse/HBASE-21715) | Do not throw UnsupportedOperationException in ProcedureFuture.get | Major | Client |
| [HBASE-21716](https://issues.apache.org/jira/browse/HBASE-21716) | Add toStringCustomizedValues to TableDescriptor | Major | . |
| [HBASE-21731](https://issues.apache.org/jira/browse/HBASE-21731) | Do not need to use ClusterConnection in IntegrationTestBigLinkedListWithVisibility | Major | . |
| [HBASE-21685](https://issues.apache.org/jira/browse/HBASE-21685) | Change repository urls to Gitbox | Critical | . |
| [HBASE-21534](https://issues.apache.org/jira/browse/HBASE-21534) | TestAssignmentManager is flakey | Major | test |
| [HBASE-21541](https://issues.apache.org/jira/browse/HBASE-21541) | Move MetaTableLocator.verifyRegionLocation to hbase-rsgroup module | Major | . |
| [HBASE-21265](https://issues.apache.org/jira/browse/HBASE-21265) | Split up TestRSGroups | Minor | rsgroup, test |
| [HBASE-21517](https://issues.apache.org/jira/browse/HBASE-21517) | Move the getTableRegionForRow method from HMaster to TestMaster | Major | test |
| [HBASE-21281](https://issues.apache.org/jira/browse/HBASE-21281) | Update bouncycastle dependency. | Major | dependencies, test |
| [HBASE-21198](https://issues.apache.org/jira/browse/HBASE-21198) | Exclude dependency on net.minidev:json-smart | Major | . |
| [HBASE-21282](https://issues.apache.org/jira/browse/HBASE-21282) | Upgrade to latest jetty 9.2 and 9.3 versions | Major | dependencies |
| [HBASE-21287](https://issues.apache.org/jira/browse/HBASE-21287) | JVMClusterUtil Master initialization wait time not configurable | Major | test |
| [HBASE-21168](https://issues.apache.org/jira/browse/HBASE-21168) | BloomFilterUtil uses hardcoded randomness | Trivial | . |
| [HBASE-20482](https://issues.apache.org/jira/browse/HBASE-20482) | Print a link to the ref guide chapter for the shell during startup | Minor | documentation, shell |
| [HBASE-20942](https://issues.apache.org/jira/browse/HBASE-20942) | Improve RpcServer TRACE logging | Major | Operability |
| [HBASE-20989](https://issues.apache.org/jira/browse/HBASE-20989) | Minor, miscellaneous logging fixes | Trivial | logging |
## Release 2.1.0 - Unreleased (as of 2018-07-10)
### INCOMPATIBLE CHANGES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20691](https://issues.apache.org/jira/browse/HBASE-20691) | Storage policy should allow deferring to HDFS | Blocker | Filesystem Integration, wal |
| [HBASE-20270](https://issues.apache.org/jira/browse/HBASE-20270) | Turn off command help that follows all errors in shell | Major | shell |
| [HBASE-20501](https://issues.apache.org/jira/browse/HBASE-20501) | Change the Hadoop minimum version to 2.7.1 | Blocker | community, documentation |
| [HBASE-20406](https://issues.apache.org/jira/browse/HBASE-20406) | HBase Thrift HTTP - Shouldn't handle TRACE/OPTIONS methods | Major | security, Thrift |
| [HBASE-20159](https://issues.apache.org/jira/browse/HBASE-20159) | Support using separate ZK quorums for client | Major | Client, Operability, Zookeeper |
| [HBASE-20148](https://issues.apache.org/jira/browse/HBASE-20148) | Make serial replication as a option for a peer instead of a table | Major | Replication |
### NEW FEATURES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20833](https://issues.apache.org/jira/browse/HBASE-20833) | Modify pre-upgrade coprocessor validator to support table level coprocessors | Major | Coprocessors |
| [HBASE-15809](https://issues.apache.org/jira/browse/HBASE-15809) | Basic Replication WebUI | Critical | Replication, UI |
| [HBASE-19735](https://issues.apache.org/jira/browse/HBASE-19735) | Create a minimal "client" tarball installation | Major | build, Client |
| [HBASE-20656](https://issues.apache.org/jira/browse/HBASE-20656) | Validate pre-2.0 coprocessors against HBase 2.0+ | Major | tooling |
| [HBASE-20592](https://issues.apache.org/jira/browse/HBASE-20592) | Create a tool to verify tables do not have prefix tree encoding | Minor | Operability, tooling |
| [HBASE-20046](https://issues.apache.org/jira/browse/HBASE-20046) | Reconsider the implementation for serial replication | Major | Replication |
| [HBASE-19397](https://issues.apache.org/jira/browse/HBASE-19397) | Design procedures for ReplicationManager to notify peer change event from master | Major | proc-v2, Replication |
### IMPROVEMENTS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20806](https://issues.apache.org/jira/browse/HBASE-20806) | Split style journal for flushes and compactions | Minor | . |
| [HBASE-20474](https://issues.apache.org/jira/browse/HBASE-20474) | Show non-RPC tasks on master/regionserver Web UI by default | Major | UI |
| [HBASE-20826](https://issues.apache.org/jira/browse/HBASE-20826) | Truncate responseInfo attributes on RpcServer WARN messages | Major | rpc |
| [HBASE-20450](https://issues.apache.org/jira/browse/HBASE-20450) | Provide metrics for number of total active, priority and replication rpc handlers | Major | metrics |
| [HBASE-20810](https://issues.apache.org/jira/browse/HBASE-20810) | Include the procedure id in the exception message in HBaseAdmin for better debugging | Major | Admin, proc-v2 |
| [HBASE-20040](https://issues.apache.org/jira/browse/HBASE-20040) | Master UI should include "Cluster Key" needed to use the cluster as a replication sink | Minor | Replication, Usability |
| [HBASE-20095](https://issues.apache.org/jira/browse/HBASE-20095) | Redesign single instance pool in CleanerChore | Critical | . |
| [HBASE-19164](https://issues.apache.org/jira/browse/HBASE-19164) | Avoid UUID.randomUUID in tests | Major | test |
| [HBASE-20739](https://issues.apache.org/jira/browse/HBASE-20739) | Add priority for SCP | Major | Recovery |
| [HBASE-20737](https://issues.apache.org/jira/browse/HBASE-20737) | put collection into ArrayList instead of addAll function | Trivial | . |
| [HBASE-20695](https://issues.apache.org/jira/browse/HBASE-20695) | Implement table level RegionServer replication metrics | Minor | metrics |
| [HBASE-20733](https://issues.apache.org/jira/browse/HBASE-20733) | QABot should run checkstyle tests if the checkstyle configs change | Minor | build, community |
| [HBASE-20625](https://issues.apache.org/jira/browse/HBASE-20625) | refactor some WALCellCodec related code | Minor | wal |
| [HBASE-19852](https://issues.apache.org/jira/browse/HBASE-19852) | HBase Thrift 1 server SPNEGO Improvements | Major | Thrift |
| [HBASE-20579](https://issues.apache.org/jira/browse/HBASE-20579) | Improve snapshot manifest copy in ExportSnapshot | Minor | mapreduce |
| [HBASE-20444](https://issues.apache.org/jira/browse/HBASE-20444) | Improve version comparison logic for HBase specific version string and add unit tests | Major | util |
| [HBASE-20594](https://issues.apache.org/jira/browse/HBASE-20594) | provide utility to compare old and new descriptors | Major | . |
| [HBASE-20640](https://issues.apache.org/jira/browse/HBASE-20640) | TestQuotaGlobalsSettingsBypass missing test category and ClassRule | Critical | test |
| [HBASE-20478](https://issues.apache.org/jira/browse/HBASE-20478) | move import checks from hbaseanti to checkstyle | Minor | test |
| [HBASE-20548](https://issues.apache.org/jira/browse/HBASE-20548) | Master fails to startup on large clusters, refreshing block distribution | Major | . |
| [HBASE-20488](https://issues.apache.org/jira/browse/HBASE-20488) | PE tool prints full name in help message | Minor | shell |
| [HBASE-20567](https://issues.apache.org/jira/browse/HBASE-20567) | Pass both old and new descriptors to pre/post hooks of modify operations for table and namespace | Major | . |
| [HBASE-20545](https://issues.apache.org/jira/browse/HBASE-20545) | Improve performance of BaseLoadBalancer.retainAssignment | Major | Balancer |
| [HBASE-16191](https://issues.apache.org/jira/browse/HBASE-16191) | Add stop\_regionserver and stop\_master to shell | Major | . |
| [HBASE-20536](https://issues.apache.org/jira/browse/HBASE-20536) | Make TestRegionServerAccounting stable and it should not use absolute number | Minor | . |
| [HBASE-20523](https://issues.apache.org/jira/browse/HBASE-20523) | PE tool should support configuring client side buffering sizes | Minor | . |
| [HBASE-20527](https://issues.apache.org/jira/browse/HBASE-20527) | Remove unused code in MetaTableAccessor | Trivial | . |
| [HBASE-20507](https://issues.apache.org/jira/browse/HBASE-20507) | Do not need to call recoverLease on the broken file when we fail to create a wal writer | Major | wal |
| [HBASE-20484](https://issues.apache.org/jira/browse/HBASE-20484) | Remove the unnecessary autoboxing in FilterListBase | Trivial | . |
| [HBASE-20327](https://issues.apache.org/jira/browse/HBASE-20327) | When qualifier is not specified, append and incr operation do not work (shell) | Minor | shell |
| [HBASE-20389](https://issues.apache.org/jira/browse/HBASE-20389) | Move website building flags into a profile | Minor | build, website |
| [HBASE-20379](https://issues.apache.org/jira/browse/HBASE-20379) | shadedjars yetus plugin should add a footer link | Major | test |
| [HBASE-20243](https://issues.apache.org/jira/browse/HBASE-20243) | [Shell] Add shell command to create a new table by cloning the existent table | Minor | shell |
| [HBASE-20286](https://issues.apache.org/jira/browse/HBASE-20286) | Improving shell command compaction\_state | Minor | shell |
| [HBASE-19488](https://issues.apache.org/jira/browse/HBASE-19488) | Move to using Apache commons CollectionUtils | Trivial | . |
| [HBASE-20197](https://issues.apache.org/jira/browse/HBASE-20197) | Review of ByteBufferWriterOutputStream.java | Minor | . |
| [HBASE-20047](https://issues.apache.org/jira/browse/HBASE-20047) | AuthenticationTokenIdentifier should provide a toString | Minor | Usability |
| [HBASE-19024](https://issues.apache.org/jira/browse/HBASE-19024) | Configurable default durability for synchronous WAL | Critical | wal |
| [HBASE-19389](https://issues.apache.org/jira/browse/HBASE-19389) | Limit concurrency of put with dense (hundreds) columns to prevent write handler exhausted | Critical | Performance |
| [HBASE-20186](https://issues.apache.org/jira/browse/HBASE-20186) | Improve RSGroupBasedLoadBalancer#balanceCluster() to be more efficient when calculating cluster state for each rsgroup | Minor | rsgroup |
| [HBASE-19449](https://issues.apache.org/jira/browse/HBASE-19449) | Minor logging change in HFileArchiver | Trivial | . |
| [HBASE-20120](https://issues.apache.org/jira/browse/HBASE-20120) | Remove some unused classes/ java files from hbase-server | Minor | . |
### BUG FIXES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20854](https://issues.apache.org/jira/browse/HBASE-20854) | Wrong retries number in RpcRetryingCaller's log message | Minor | Client, logging |
| [HBASE-20784](https://issues.apache.org/jira/browse/HBASE-20784) | Will lose the SNAPSHOT suffix if we get the version of RS from ServerManager | Minor | master, UI |
| [HBASE-20822](https://issues.apache.org/jira/browse/HBASE-20822) | TestAsyncNonMetaRegionLocator is flakey | Major | asyncclient |
| [HBASE-20808](https://issues.apache.org/jira/browse/HBASE-20808) | Wrong shutdown order between Chores and ChoreService | Minor | . |
| [HBASE-20789](https://issues.apache.org/jira/browse/HBASE-20789) | TestBucketCache#testCacheBlockNextBlockMetadataMissing is flaky | Major | . |
| [HBASE-20829](https://issues.apache.org/jira/browse/HBASE-20829) | Remove the addFront assertion in MasterProcedureScheduler.doAdd | Major | Replication |
| [HBASE-20825](https://issues.apache.org/jira/browse/HBASE-20825) | Fix pre and post hooks of CloneSnapshot and RestoreSnapshot for Access checks | Major | security |
| [HBASE-20812](https://issues.apache.org/jira/browse/HBASE-20812) | Add defaults to Table Interface so implementors don't have to | Major | . |
| [HBASE-20817](https://issues.apache.org/jira/browse/HBASE-20817) | Infinite loop when executing ReopenTableRegionsProcedure | Blocker | Region Assignment |
| [HBASE-20792](https://issues.apache.org/jira/browse/HBASE-20792) | info:servername and info:sn inconsistent for OPEN region | Blocker | Region Assignment |
| [HBASE-20769](https://issues.apache.org/jira/browse/HBASE-20769) | getSplits() has a out of bounds problem in TableSnapshotInputFormatImpl | Major | . |
| [HBASE-20732](https://issues.apache.org/jira/browse/HBASE-20732) | Shutdown scan pool when master is stopped. | Minor | . |
| [HBASE-20785](https://issues.apache.org/jira/browse/HBASE-20785) | NPE getting metrics in PE testing scans | Major | Performance |
| [HBASE-20795](https://issues.apache.org/jira/browse/HBASE-20795) | Allow option in BBKVComparator.compare to do comparison without sequence id | Major | . |
| [HBASE-20777](https://issues.apache.org/jira/browse/HBASE-20777) | RpcConnection could still remain opened after we shutdown the NettyRpcServer | Major | rpc |
| [HBASE-20403](https://issues.apache.org/jira/browse/HBASE-20403) | Prefetch sometimes doesn't work with encrypted file system | Major | . |
| [HBASE-20635](https://issues.apache.org/jira/browse/HBASE-20635) | Support to convert the shaded user permission proto to client user permission object | Major | . |
| [HBASE-20778](https://issues.apache.org/jira/browse/HBASE-20778) | Make it so WALPE runs on DFS | Major | test |
| [HBASE-20775](https://issues.apache.org/jira/browse/HBASE-20775) | TestMultiParallel is flakey | Major | Region Assignment |
| [HBASE-20752](https://issues.apache.org/jira/browse/HBASE-20752) | Make sure the regions are truly reopened after ReopenTableRegionsProcedure | Major | proc-v2 |
| [HBASE-18622](https://issues.apache.org/jira/browse/HBASE-18622) | Mitigate API compatibility concerns between branch-1 and branch-2 | Blocker | API |
| [HBASE-20767](https://issues.apache.org/jira/browse/HBASE-20767) | Always close hbaseAdmin along with connection in HBTU | Major | test |
| [HBASE-20642](https://issues.apache.org/jira/browse/HBASE-20642) | IntegrationTestDDLMasterFailover throws 'InvalidFamilyOperationException | Major | . |
| [HBASE-20742](https://issues.apache.org/jira/browse/HBASE-20742) | Always create WAL directory for region server | Major | wal |
| [HBASE-20708](https://issues.apache.org/jira/browse/HBASE-20708) | Remove the usage of RecoverMetaProcedure in master startup | Blocker | proc-v2, Region Assignment |
| [HBASE-20723](https://issues.apache.org/jira/browse/HBASE-20723) | Custom hbase.wal.dir results in data loss because we write recovered edits into a different place than where the recovering region server looks for them | Critical | Recovery, wal |
| [HBASE-20681](https://issues.apache.org/jira/browse/HBASE-20681) | IntegrationTestDriver fails after HADOOP-15406 due to missing hamcrest-core | Major | integration tests |
| [HBASE-20561](https://issues.apache.org/jira/browse/HBASE-20561) | The way we stop a ReplicationSource may cause the RS down | Major | Replication |
| [HBASE-19377](https://issues.apache.org/jira/browse/HBASE-19377) | Compatibility checker complaining about hash collisions | Major | community |
| [HBASE-20689](https://issues.apache.org/jira/browse/HBASE-20689) | Docker fails to install rubocop for precommit | Blocker | build |
| [HBASE-20707](https://issues.apache.org/jira/browse/HBASE-20707) | Move MissingSwitchDefault check from checkstyle to error-prone | Major | build |
| [HBASE-20699](https://issues.apache.org/jira/browse/HBASE-20699) | QuotaCache should cancel the QuotaRefresherChore service inside its stop() | Major | . |
| [HBASE-20590](https://issues.apache.org/jira/browse/HBASE-20590) | REST Java client is not able to negotiate with the server in the secure mode | Critical | REST, security |
| [HBASE-20683](https://issues.apache.org/jira/browse/HBASE-20683) | Incorrect return value for PreUpgradeValidator | Critical | . |
| [HBASE-20684](https://issues.apache.org/jira/browse/HBASE-20684) | org.apache.hadoop.hbase.client.Scan#setStopRow javadoc uses incorrect method | Trivial | Client, documentation |
| [HBASE-20678](https://issues.apache.org/jira/browse/HBASE-20678) | NPE in ReplicationSourceManager#NodeFailoverWorker | Minor | . |
| [HBASE-20670](https://issues.apache.org/jira/browse/HBASE-20670) | NPE in HMaster#isInMaintenanceMode | Minor | . |
| [HBASE-20634](https://issues.apache.org/jira/browse/HBASE-20634) | Reopen region while server crash can cause the procedure to be stuck | Critical | . |
| [HBASE-12882](https://issues.apache.org/jira/browse/HBASE-12882) | Log level for org.apache.hadoop.hbase package should be configurable | Major | . |
| [HBASE-20668](https://issues.apache.org/jira/browse/HBASE-20668) | Avoid permission change if ExportSnapshot's copy fails | Major | . |
| [HBASE-18116](https://issues.apache.org/jira/browse/HBASE-18116) | Replication source in-memory accounting should not include bulk transfer hfiles | Major | Replication |
| [HBASE-20602](https://issues.apache.org/jira/browse/HBASE-20602) | hbase.master.quota.observer.ignore property seems to be not taking effect | Minor | documentation |
| [HBASE-20664](https://issues.apache.org/jira/browse/HBASE-20664) | Variable shared across multiple threads | Major | . |
| [HBASE-20659](https://issues.apache.org/jira/browse/HBASE-20659) | Implement a reopen table regions procedure | Major | . |
| [HBASE-20582](https://issues.apache.org/jira/browse/HBASE-20582) | Bump up JRuby version because of some reported vulnerabilities | Major | dependencies, shell |
| [HBASE-20533](https://issues.apache.org/jira/browse/HBASE-20533) | Fix the flaky TestAssignmentManagerMetrics | Major | . |
| [HBASE-20597](https://issues.apache.org/jira/browse/HBASE-20597) | Use a lock to serialize access to a shared reference to ZooKeeperWatcher in HBaseReplicationEndpoint | Minor | Replication |
| [HBASE-20633](https://issues.apache.org/jira/browse/HBASE-20633) | Dropping a table containing a disable violation policy fails to remove the quota upon table delete | Major | . |
| [HBASE-20645](https://issues.apache.org/jira/browse/HBASE-20645) | Fix security\_available method in security.rb | Major | . |
| [HBASE-20612](https://issues.apache.org/jira/browse/HBASE-20612) | TestReplicationKillSlaveRSWithSeparateOldWALs sometimes fail because it uses an expired cluster conn | Major | . |
| [HBASE-20648](https://issues.apache.org/jira/browse/HBASE-20648) | HBASE-19364 "Truncate\_preserve fails with table when replica region \> 1" for master branch | Major | . |
| [HBASE-20588](https://issues.apache.org/jira/browse/HBASE-20588) | Space quota change after quota violation doesn't seem to take in effect | Major | regionserver |
| [HBASE-20616](https://issues.apache.org/jira/browse/HBASE-20616) | TruncateTableProcedure is stuck in retry loop in TRUNCATE\_TABLE\_CREATE\_FS\_LAYOUT state | Major | amv2 |
| [HBASE-20638](https://issues.apache.org/jira/browse/HBASE-20638) | nightly source artifact testing should fail the stage if it's going to report an error on jira | Major | test |
| [HBASE-20624](https://issues.apache.org/jira/browse/HBASE-20624) | Race in ReplicationSource which causes walEntryFilter being null when creating new shipper | Major | Replication |
| [HBASE-20601](https://issues.apache.org/jira/browse/HBASE-20601) | Add multiPut support and other miscellaneous to PE | Minor | tooling |
| [HBASE-20627](https://issues.apache.org/jira/browse/HBASE-20627) | Relocate RS Group pre/post hooks from RSGroupAdminServer to RSGroupAdminEndpoint | Major | . |
| [HBASE-20591](https://issues.apache.org/jira/browse/HBASE-20591) | nightly job doesn't respect maven options | Critical | test |
| [HBASE-20560](https://issues.apache.org/jira/browse/HBASE-20560) | Revisit the TestReplicationDroppedTables ut | Major | . |
| [HBASE-20571](https://issues.apache.org/jira/browse/HBASE-20571) | JMXJsonServlet generates invalid JSON if it has NaN in metrics | Major | UI |
| [HBASE-20585](https://issues.apache.org/jira/browse/HBASE-20585) | Need to clear peer map when clearing MasterProcedureScheduler | Major | proc-v2 |
| [HBASE-20457](https://issues.apache.org/jira/browse/HBASE-20457) | Return immediately for a scan rpc call when we want to switch from pread to stream | Major | scan |
| [HBASE-20447](https://issues.apache.org/jira/browse/HBASE-20447) | Only fail cacheBlock if block collisions aren't related to next block metadata | Major | BlockCache, BucketCache |
| [HBASE-20544](https://issues.apache.org/jira/browse/HBASE-20544) | downstream HBaseTestingUtility fails with invalid port | Blocker | test |
| [HBASE-20004](https://issues.apache.org/jira/browse/HBASE-20004) | Client is not able to execute REST queries in a secure cluster | Minor | REST, security |
| [HBASE-20475](https://issues.apache.org/jira/browse/HBASE-20475) | Fix the flaky TestReplicationDroppedTables unit test. | Major | . |
| [HBASE-20554](https://issues.apache.org/jira/browse/HBASE-20554) | "WALs outstanding" message from CleanerChore is noisy | Trivial | . |
| [HBASE-20204](https://issues.apache.org/jira/browse/HBASE-20204) | Add locking to RefreshFileConnections in BucketCache | Major | BucketCache |
| [HBASE-20485](https://issues.apache.org/jira/browse/HBASE-20485) | Copy constructor of Scan doesn't copy the readType and replicaId | Minor | . |
| [HBASE-20543](https://issues.apache.org/jira/browse/HBASE-20543) | Fix the flaky TestThriftHttpServer | Major | . |
| [HBASE-20521](https://issues.apache.org/jira/browse/HBASE-20521) | TableOutputFormat.checkOutputSpecs conf checking sequence cause pig script run fail | Major | mapreduce |
| [HBASE-20500](https://issues.apache.org/jira/browse/HBASE-20500) | [rsgroup] should keep at least one server in default group | Major | rsgroup |
| [HBASE-20517](https://issues.apache.org/jira/browse/HBASE-20517) | Fix PerformanceEvaluation 'column' parameter | Major | test |
| [HBASE-20524](https://issues.apache.org/jira/browse/HBASE-20524) | Need to clear metrics when ReplicationSourceManager refresh replication sources | Minor | . |
| [HBASE-20476](https://issues.apache.org/jira/browse/HBASE-20476) | Open sequence number could go backwards in AssignProcedure | Major | Region Assignment |
| [HBASE-20506](https://issues.apache.org/jira/browse/HBASE-20506) | Add doc and test for unused RetryCounter, useful-looking utility | Minor | . |
| [HBASE-20492](https://issues.apache.org/jira/browse/HBASE-20492) | UnassignProcedure is stuck in retry loop on region stuck in OPENING state | Critical | amv2 |
| [HBASE-20497](https://issues.apache.org/jira/browse/HBASE-20497) | The getRecoveredQueueStartPos always return 0 in RecoveredReplicationSourceShipper | Major | Replication |
| [HBASE-18842](https://issues.apache.org/jira/browse/HBASE-18842) | The hbase shell clone\_snaphost command returns bad error message | Minor | shell |
| [HBASE-20466](https://issues.apache.org/jira/browse/HBASE-20466) | Consistently use override mechanism for exempt classes in CoprocessClassloader | Major | Coprocessors |
| [HBASE-20006](https://issues.apache.org/jira/browse/HBASE-20006) | TestRestoreSnapshotFromClientWithRegionReplicas is flakey | Critical | read replicas |
| [HBASE-18059](https://issues.apache.org/jira/browse/HBASE-18059) | The scanner order for memstore scanners are wrong | Critical | regionserver, scan, Scanners |
| [HBASE-20404](https://issues.apache.org/jira/browse/HBASE-20404) | Ugly cleanerchore complaint that dir is not empty | Major | master |
| [HBASE-20419](https://issues.apache.org/jira/browse/HBASE-20419) | Fix potential NPE in ZKUtil#listChildrenAndWatchForNewChildren callers | Major | . |
| [HBASE-20364](https://issues.apache.org/jira/browse/HBASE-20364) | nightly job gives old results or no results for stages that timeout on SCM | Critical | test |
| [HBASE-20335](https://issues.apache.org/jira/browse/HBASE-20335) | nightly jobs no longer contain machine information | Critical | test |
| [HBASE-20338](https://issues.apache.org/jira/browse/HBASE-20338) | WALProcedureStore#recoverLease() should have fixed sleeps for retrying rollWriter() | Major | . |
| [HBASE-20356](https://issues.apache.org/jira/browse/HBASE-20356) | make skipping protoc possible | Critical | dependencies, thirdparty |
| [HBASE-15291](https://issues.apache.org/jira/browse/HBASE-15291) | FileSystem not closed in secure bulkLoad | Major | . |
| [HBASE-20068](https://issues.apache.org/jira/browse/HBASE-20068) | Hadoopcheck project health check uses default maven repo instead of yetus managed ones | Major | community, test |
| [HBASE-20361](https://issues.apache.org/jira/browse/HBASE-20361) | Non-successive TableInputSplits may wrongly be merged by auto balancing feature | Major | mapreduce |
| [HBASE-20260](https://issues.apache.org/jira/browse/HBASE-20260) | Purge old content from the book for branch-2/master | Critical | documentation |
| [HBASE-20058](https://issues.apache.org/jira/browse/HBASE-20058) | improper quoting in presplitting command docs | Minor | documentation |
| [HBASE-19923](https://issues.apache.org/jira/browse/HBASE-19923) | Reset peer state and config when refresh replication source failed | Major | Replication |
| [HBASE-19748](https://issues.apache.org/jira/browse/HBASE-19748) | TestRegionReplicaFailover and TestRegionReplicaReplicationEndpoint UT hangs | Major | . |
### TESTS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20667](https://issues.apache.org/jira/browse/HBASE-20667) | Rename TestGlobalThrottler to TestReplicationGlobalThrottler | Trivial | . |
| [HBASE-20646](https://issues.apache.org/jira/browse/HBASE-20646) | TestWALProcedureStoreOnHDFS failing on branch-1 | Trivial | . |
| [HBASE-20505](https://issues.apache.org/jira/browse/HBASE-20505) | PE should support multi column family read and write cases | Minor | . |
| [HBASE-20513](https://issues.apache.org/jira/browse/HBASE-20513) | Collect and emit ScanMetrics in PerformanceEvaluation | Minor | test |
| [HBASE-20414](https://issues.apache.org/jira/browse/HBASE-20414) | TestLockProcedure#testMultipleLocks may fail on slow machine | Major | . |
### SUB-TASKS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20831](https://issues.apache.org/jira/browse/HBASE-20831) | Copy master doc into branch-2.1 and edit to make it suit 2.1.0 | Blocker | documentation |
| [HBASE-20839](https://issues.apache.org/jira/browse/HBASE-20839) | Fallback to FSHLog if we can not instantiated AsyncFSWAL when user does not specify AsyncFSWAL explicitly | Blocker | wal |
| [HBASE-20244](https://issues.apache.org/jira/browse/HBASE-20244) | NoSuchMethodException when retrieving private method decryptEncryptedDataEncryptionKey from DFSClient | Blocker | wal |
| [HBASE-20193](https://issues.apache.org/jira/browse/HBASE-20193) | Basic Replication Web UI - Regionserver | Critical | Replication, Usability |
| [HBASE-20489](https://issues.apache.org/jira/browse/HBASE-20489) | Update Reference Guide that CLUSTER\_KEY value is present on the Master UI info page. | Minor | documentation |
| [HBASE-19722](https://issues.apache.org/jira/browse/HBASE-19722) | Meta query statistics metrics source | Major | . |
| [HBASE-20781](https://issues.apache.org/jira/browse/HBASE-20781) | Save recalculating families in a WALEdit batch of Cells | Major | Performance |
| [HBASE-20194](https://issues.apache.org/jira/browse/HBASE-20194) | Basic Replication WebUI - Master | Critical | Replication, Usability |
| [HBASE-20780](https://issues.apache.org/jira/browse/HBASE-20780) | ServerRpcConnection logging cleanup | Major | logging, Performance |
| [HBASE-19764](https://issues.apache.org/jira/browse/HBASE-19764) | Fix Checkstyle errors in hbase-endpoint | Minor | . |
| [HBASE-20710](https://issues.apache.org/jira/browse/HBASE-20710) | extra cloneFamily() in Mutation.add(Cell) | Minor | regionserver |
| [HBASE-18569](https://issues.apache.org/jira/browse/HBASE-18569) | Add prefetch support for async region locator | Major | asyncclient, Client |
| [HBASE-20706](https://issues.apache.org/jira/browse/HBASE-20706) | [hack] Don't add known not-OPEN regions in reopen phase of MTP | Critical | amv2 |
| [HBASE-20334](https://issues.apache.org/jira/browse/HBASE-20334) | add a test that expressly uses both our shaded client and the one from hadoop 3 | Major | hadoop3, shading |
| [HBASE-20615](https://issues.apache.org/jira/browse/HBASE-20615) | emphasize use of shaded client jars when they're present in an install | Major | build, Client, Usability |
| [HBASE-20333](https://issues.apache.org/jira/browse/HBASE-20333) | break up shaded client into one with no Hadoop and one that's standalone | Critical | shading |
| [HBASE-20332](https://issues.apache.org/jira/browse/HBASE-20332) | shaded mapreduce module shouldn't include hadoop | Critical | mapreduce, shading |
| [HBASE-20722](https://issues.apache.org/jira/browse/HBASE-20722) | Make RegionServerTracker only depend on children changed event | Major | . |
| [HBASE-20700](https://issues.apache.org/jira/browse/HBASE-20700) | Move meta region when server crash can cause the procedure to be stuck | Critical | master, proc-v2, Region Assignment |
| [HBASE-20628](https://issues.apache.org/jira/browse/HBASE-20628) | SegmentScanner does over-comparing when one flushing | Critical | Performance |
| [HBASE-19761](https://issues.apache.org/jira/browse/HBASE-19761) | Fix Checkstyle errors in hbase-zookeeper | Minor | . |
| [HBASE-19724](https://issues.apache.org/jira/browse/HBASE-19724) | Fix Checkstyle errors in hbase-hadoop2-compat | Minor | . |
| [HBASE-20518](https://issues.apache.org/jira/browse/HBASE-20518) | Need to serialize the enabled field for UpdatePeerConfigProcedure | Major | Replication |
| [HBASE-20481](https://issues.apache.org/jira/browse/HBASE-20481) | Replicate entries from same region serially in ReplicationEndpoint for serial replication | Major | . |
| [HBASE-20378](https://issues.apache.org/jira/browse/HBASE-20378) | Provide a hbck option to cleanup replication barrier for a table | Major | . |
| [HBASE-20128](https://issues.apache.org/jira/browse/HBASE-20128) | Add new UTs which extends the old replication UTs but set replication scope to SERIAL | Major | . |
| [HBASE-20417](https://issues.apache.org/jira/browse/HBASE-20417) | Do not read wal entries when peer is disabled | Major | Replication |
| [HBASE-20294](https://issues.apache.org/jira/browse/HBASE-20294) | Also cleanup last pushed sequence id in ReplicationBarrierCleaner | Major | Replication |
| [HBASE-20377](https://issues.apache.org/jira/browse/HBASE-20377) | Deal with table in enabling and disabling state when modifying serial replication peer | Major | Replication |
| [HBASE-20367](https://issues.apache.org/jira/browse/HBASE-20367) | Write a replication barrier for regions when disabling a table | Major | Replication |
| [HBASE-20296](https://issues.apache.org/jira/browse/HBASE-20296) | Remove last pushed sequence ids when removing tables from a peer | Major | Replication |
| [HBASE-20285](https://issues.apache.org/jira/browse/HBASE-20285) | Delete all last pushed sequence ids when removing a peer or removing the serial flag for a peer | Major | Replication |
| [HBASE-20138](https://issues.apache.org/jira/browse/HBASE-20138) | Find a way to deal with the conflicts when updating replication position | Major | Replication |
| [HBASE-20127](https://issues.apache.org/jira/browse/HBASE-20127) | Add UT for serial replication after failover | Major | Replication, test |
| [HBASE-20271](https://issues.apache.org/jira/browse/HBASE-20271) | ReplicationSourceWALReader.switched should use the file name instead of the path object directly | Major | Replication |
| [HBASE-20227](https://issues.apache.org/jira/browse/HBASE-20227) | Add UT for ReplicationUtils.contains method | Major | Replication, test |
| [HBASE-20147](https://issues.apache.org/jira/browse/HBASE-20147) | Serial replication will be stuck if we create a table with serial replication but add it to a peer after there are region moves | Major | . |
| [HBASE-20116](https://issues.apache.org/jira/browse/HBASE-20116) | Optimize the region last pushed sequence id layout on zk | Major | Replication |
| [HBASE-20242](https://issues.apache.org/jira/browse/HBASE-20242) | The open sequence number will grow if we fail to open a region after writing the max sequence id file | Major | . |
| [HBASE-20155](https://issues.apache.org/jira/browse/HBASE-20155) | update branch-2 version to 2.1.0-SNAPSHOT | Major | build, community |
| [HBASE-20206](https://issues.apache.org/jira/browse/HBASE-20206) | WALEntryStream should not switch WAL file silently | Major | Replication |
| [HBASE-20117](https://issues.apache.org/jira/browse/HBASE-20117) | Cleanup the unused replication barriers in meta table | Major | master, Replication |
| [HBASE-20165](https://issues.apache.org/jira/browse/HBASE-20165) | Shell command to make a normal peer to be a serial replication peer | Major | . |
| [HBASE-20167](https://issues.apache.org/jira/browse/HBASE-20167) | Optimize the implementation of ReplicationSourceWALReader | Major | Replication |
| [HBASE-20125](https://issues.apache.org/jira/browse/HBASE-20125) | Add UT for serial replication after region split and merge | Major | Replication |
| [HBASE-20129](https://issues.apache.org/jira/browse/HBASE-20129) | Add UT for serial replication checker | Major | Replication |
| [HBASE-20115](https://issues.apache.org/jira/browse/HBASE-20115) | Reimplement serial replication based on the new replication storage layer | Major | Replication |
| [HBASE-20050](https://issues.apache.org/jira/browse/HBASE-20050) | Reimplement updateReplicationPositions logic in serial replication based on the newly introduced replication storage layer | Major | . |
| [HBASE-20082](https://issues.apache.org/jira/browse/HBASE-20082) | Fix findbugs errors only on master which are introduced by HBASE-19397 | Major | findbugs |
| [HBASE-19936](https://issues.apache.org/jira/browse/HBASE-19936) | Introduce a new base class for replication peer procedure | Major | . |
| [HBASE-19719](https://issues.apache.org/jira/browse/HBASE-19719) | Fix checkstyle issues | Major | proc-v2, Replication |
| [HBASE-19711](https://issues.apache.org/jira/browse/HBASE-19711) | TestReplicationAdmin.testConcurrentPeerOperations hangs | Major | proc-v2 |
| [HBASE-19707](https://issues.apache.org/jira/browse/HBASE-19707) | Race in start and terminate of a replication source after we async start replicatione endpoint | Major | proc-v2, Replication |
| [HBASE-19636](https://issues.apache.org/jira/browse/HBASE-19636) | All rs should already start work with the new peer change when replication peer procedure is finished | Major | proc-v2, Replication |
| [HBASE-19634](https://issues.apache.org/jira/browse/HBASE-19634) | Add permission check for executeProcedures in AccessController | Major | proc-v2, Replication |
| [HBASE-19697](https://issues.apache.org/jira/browse/HBASE-19697) | Remove TestReplicationAdminUsingProcedure | Major | proc-v2, Replication |
| [HBASE-19661](https://issues.apache.org/jira/browse/HBASE-19661) | Replace ReplicationStateZKBase with ZKReplicationStorageBase | Major | proc-v2, Replication |
| [HBASE-19687](https://issues.apache.org/jira/browse/HBASE-19687) | Move the logic in ReplicationZKNodeCleaner to ReplicationChecker and remove ReplicationZKNodeCleanerChore | Major | proc-v2, Replication |
| [HBASE-19544](https://issues.apache.org/jira/browse/HBASE-19544) | Add UTs for testing concurrent modifications on replication peer | Major | proc-v2, Replication, test |
| [HBASE-19686](https://issues.apache.org/jira/browse/HBASE-19686) | Use KeyLocker instead of ReentrantLock in PeerProcedureHandlerImpl | Major | proc-v2, Replication |
| [HBASE-19623](https://issues.apache.org/jira/browse/HBASE-19623) | Create replication endpoint asynchronously when adding a replication source | Major | proc-v2, Replication |
| [HBASE-19633](https://issues.apache.org/jira/browse/HBASE-19633) | Clean up the replication queues in the postPeerModification stage when removing a peer | Major | proc-v2, Replication |
| [HBASE-19622](https://issues.apache.org/jira/browse/HBASE-19622) | Reimplement ReplicationPeers with the new replication storage interface | Major | proc-v2, Replication |
| [HBASE-19635](https://issues.apache.org/jira/browse/HBASE-19635) | Introduce a thread at RS side to call reportProcedureDone | Major | proc-v2 |
| [HBASE-19617](https://issues.apache.org/jira/browse/HBASE-19617) | Remove ReplicationQueues, use ReplicationQueueStorage directly | Major | Replication |
| [HBASE-19642](https://issues.apache.org/jira/browse/HBASE-19642) | Fix locking for peer modification procedure | Critical | proc-v2, Replication |
| [HBASE-19592](https://issues.apache.org/jira/browse/HBASE-19592) | Add UTs to test retry on update zk failure | Major | proc-v2, Replication |
| [HBASE-19630](https://issues.apache.org/jira/browse/HBASE-19630) | Add peer cluster key check when add new replication peer | Major | proc-v2, Replication |
| [HBASE-19573](https://issues.apache.org/jira/browse/HBASE-19573) | Rewrite ReplicationPeer with the new replication storage interface | Major | proc-v2, Replication |
| [HBASE-19579](https://issues.apache.org/jira/browse/HBASE-19579) | Add peer lock test for shell command list\_locks | Major | proc-v2, Replication |
| [HBASE-19599](https://issues.apache.org/jira/browse/HBASE-19599) | Remove ReplicationQueuesClient, use ReplicationQueueStorage directly | Major | Replication |
| [HBASE-19543](https://issues.apache.org/jira/browse/HBASE-19543) | Abstract a replication storage interface to extract the zk specific code | Major | proc-v2, Replication |
| [HBASE-19525](https://issues.apache.org/jira/browse/HBASE-19525) | RS side changes for moving peer modification from zk watcher to procedure | Major | proc-v2, Replication |
| [HBASE-19580](https://issues.apache.org/jira/browse/HBASE-19580) | Use slf4j instead of commons-logging in new, just-added Peer Procedure classes | Major | proc-v2, Replication |
| [HBASE-19520](https://issues.apache.org/jira/browse/HBASE-19520) | Add UTs for the new lock type PEER | Major | proc-v2 |
| [HBASE-19564](https://issues.apache.org/jira/browse/HBASE-19564) | Procedure id is missing in the response of peer related operations | Major | proc-v2, Replication |
| [HBASE-19536](https://issues.apache.org/jira/browse/HBASE-19536) | Client side changes for moving peer modification from zk watcher to procedure | Major | Replication |
| [HBASE-19524](https://issues.apache.org/jira/browse/HBASE-19524) | Master side changes for moving peer modification from zk watcher to procedure | Major | proc-v2, Replication |
| [HBASE-19216](https://issues.apache.org/jira/browse/HBASE-19216) | Implement a general framework to execute remote procedure on RS | Major | proc-v2, Replication |
### OTHER:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-19997](https://issues.apache.org/jira/browse/HBASE-19997) | [rolling upgrade] 1.x =\> 2.x | Blocker | . |
| [HBASE-20360](https://issues.apache.org/jira/browse/HBASE-20360) | Further optimization for serial replication | Major | Replication |
| [HBASE-20862](https://issues.apache.org/jira/browse/HBASE-20862) | Address 2.1.0 Compatibility Report Issues | Blocker | compatibility |
| [HBASE-20665](https://issues.apache.org/jira/browse/HBASE-20665) | "Already cached block XXX" message should be DEBUG | Minor | BlockCache |
| [HBASE-20677](https://issues.apache.org/jira/browse/HBASE-20677) | Backport test of HBASE-20566 'Creating a system table after enabling rsgroup feature puts region into RIT' to branch-2 | Major | . |
| [HBASE-19475](https://issues.apache.org/jira/browse/HBASE-19475) | Extend backporting strategy in documentation | Trivial | documentation |
| [HBASE-20595](https://issues.apache.org/jira/browse/HBASE-20595) | Remove the concept of 'special tables' from rsgroups | Major | Region Assignment, rsgroup |
| [HBASE-20415](https://issues.apache.org/jira/browse/HBASE-20415) | branches-2 don't need maven-scala-plugin | Major | build |
| [HBASE-20112](https://issues.apache.org/jira/browse/HBASE-20112) | Include test results from nightly hadoop3 tests in jenkins test results | Critical | test |
| [HBASE-17918](https://issues.apache.org/jira/browse/HBASE-17918) | document serial replication | Critical | documentation, Replication |
| [HBASE-19737](https://issues.apache.org/jira/browse/HBASE-19737) | Manage a HBASE-19397-branch-2 branch and merge it to branch-2 | Major | proc-v2, Replication |
## Release 2.0.0 - Unreleased (as of 2018-04-22)
### INCOMPATIBLE CHANGES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20276](https://issues.apache.org/jira/browse/HBASE-20276) | [shell] Revert shell REPL change and document | Blocker | documentation, shell |
| [HBASE-16459](https://issues.apache.org/jira/browse/HBASE-16459) | Remove unused hbase shell --format option | Trivial | shell |
| [HBASE-19128](https://issues.apache.org/jira/browse/HBASE-19128) | Purge Distributed Log Replay from codebase, configurations, text; mark the feature as unsupported, broken. | Major | documentation |
| [HBASE-19504](https://issues.apache.org/jira/browse/HBASE-19504) | Add TimeRange support into checkAndMutate | Major | . |
| [HBASE-20119](https://issues.apache.org/jira/browse/HBASE-20119) | Introduce a pojo class to carry coprocessor information in order to make TableDescriptorBuilder accept multiple cp at once | Minor | . |
| [HBASE-19437](https://issues.apache.org/jira/browse/HBASE-19437) | Batch operation can't handle the null result for Append/Increment | Critical | Usability |
| [HBASE-19873](https://issues.apache.org/jira/browse/HBASE-19873) | Add a CategoryBasedTimeout ClassRule for all UTs | Major | . |
| [HBASE-19783](https://issues.apache.org/jira/browse/HBASE-19783) | Change replication peer cluster key/endpoint from a not-null value to null is not allowed | Minor | Replication |
| [HBASE-19483](https://issues.apache.org/jira/browse/HBASE-19483) | Add proper privilege check for rsgroup commands | Major | rsgroup, security |
| [HBASE-19492](https://issues.apache.org/jira/browse/HBASE-19492) | Add EXCLUDE\_NAMESPACE and EXCLUDE\_TABLECFS support to replication peer config | Major | . |
| [HBASE-19357](https://issues.apache.org/jira/browse/HBASE-19357) | Bucket cache no longer L2 for LRU cache | Major | . |
| [HBASE-19359](https://issues.apache.org/jira/browse/HBASE-19359) | Revisit the default config of hbase client retries number | Major | . |
| [HBASE-19092](https://issues.apache.org/jira/browse/HBASE-19092) | Make Tag IA.LimitedPrivate and expose for CPs | Critical | Coprocessors |
| [HBASE-19187](https://issues.apache.org/jira/browse/HBASE-19187) | Remove option to create on heap bucket cache | Minor | regionserver |
| [HBASE-19033](https://issues.apache.org/jira/browse/HBASE-19033) | Allow CP users to change versions and TTL before opening StoreScanner | Blocker | Coprocessors |
| [HBASE-19047](https://issues.apache.org/jira/browse/HBASE-19047) | CP exposed Scanner types should not extend Shipper | Critical | Coprocessors |
| [HBASE-18905](https://issues.apache.org/jira/browse/HBASE-18905) | Allow CPs to request flush on Region and know the completion of the requested flush | Major | Coprocessors |
| [HBASE-18410](https://issues.apache.org/jira/browse/HBASE-18410) | FilterList Improvement. | Major | Filters |
| [HBASE-18893](https://issues.apache.org/jira/browse/HBASE-18893) | Remove Add/Modify/DeleteColumnFamilyProcedure in favor of using ModifyTableProcedure | Major | Coprocessors, master |
| [HBASE-19067](https://issues.apache.org/jira/browse/HBASE-19067) | Do not expose getHDFSBlockDistribution in StoreFile | Major | Coprocessors |
| [HBASE-18989](https://issues.apache.org/jira/browse/HBASE-18989) | Polish the compaction related CP hooks | Major | Compaction, Coprocessors |
| [HBASE-19046](https://issues.apache.org/jira/browse/HBASE-19046) | RegionObserver#postCompactSelection Avoid passing shaded ImmutableList param | Major | Coprocessors |
| [HBASE-19001](https://issues.apache.org/jira/browse/HBASE-19001) | Remove the hooks in RegionObserver which are designed to construct a StoreScanner which is marked as IA.Private | Major | Coprocessors |
| [HBASE-14247](https://issues.apache.org/jira/browse/HBASE-14247) | Separate the old WALs into different regionserver directories | Critical | wal |
| [HBASE-18183](https://issues.apache.org/jira/browse/HBASE-18183) | Region interface cleanup for CP expose | Major | Coprocessors |
| [HBASE-18878](https://issues.apache.org/jira/browse/HBASE-18878) | Use Optional\<T\> return types when T can be null | Major | Coprocessors |
| [HBASE-18649](https://issues.apache.org/jira/browse/HBASE-18649) | Deprecate KV Usage in MR to move to Cells in 3.0 | Major | API, mapreduce |
| [HBASE-18897](https://issues.apache.org/jira/browse/HBASE-18897) | Substitute MemStore for Memstore | Major | . |
| [HBASE-18883](https://issues.apache.org/jira/browse/HBASE-18883) | Upgrade to Curator 4.0 | Major | Client, dependencies |
| [HBASE-18839](https://issues.apache.org/jira/browse/HBASE-18839) | Apply RegionInfo to code base | Major | Coprocessors |
| [HBASE-18826](https://issues.apache.org/jira/browse/HBASE-18826) | Use HStore instead of Store in our own code base and remove unnecessary methods in Store interface | Major | Coprocessors |
| [HBASE-17732](https://issues.apache.org/jira/browse/HBASE-17732) | Coprocessor Design Improvements | Critical | Coprocessors |
| [HBASE-18298](https://issues.apache.org/jira/browse/HBASE-18298) | RegionServerServices Interface cleanup for CP expose | Critical | Coprocessors |
| [HBASE-16769](https://issues.apache.org/jira/browse/HBASE-16769) | Deprecate/remove PB references from MasterObserver and RegionServerObserver | Blocker | . |
| [HBASE-18859](https://issues.apache.org/jira/browse/HBASE-18859) | Purge PB from BulkLoadObserver | Major | Coprocessors |
| [HBASE-18731](https://issues.apache.org/jira/browse/HBASE-18731) | [compat 1-2] Mark protected methods of QuotaSettings that touch Protobuf internals as IA.Private | Major | API |
| [HBASE-18825](https://issues.apache.org/jira/browse/HBASE-18825) | Use HStoreFile instead of StoreFile in our own code base and remove unnecessary methods in StoreFile interface | Major | Coprocessors |
| [HBASE-18142](https://issues.apache.org/jira/browse/HBASE-18142) | Deletion of a cell deletes the previous versions too | Major | API, shell |
| [HBASE-18446](https://issues.apache.org/jira/browse/HBASE-18446) | Mark StoreFileScanner/StoreFileReader as IA.LimitedPrivate(Phoenix) | Critical | Coprocessors |
| [HBASE-18798](https://issues.apache.org/jira/browse/HBASE-18798) | Remove the unused methods in RegionServerObserver | Major | Coprocessors |
| [HBASE-18453](https://issues.apache.org/jira/browse/HBASE-18453) | CompactionRequest should not be exposed to user directly | Major | Coprocessors |
| [HBASE-18794](https://issues.apache.org/jira/browse/HBASE-18794) | Remove deprecated methods in MasterObserver | Major | Coprocessors |
| [HBASE-17823](https://issues.apache.org/jira/browse/HBASE-17823) | Migrate to Apache Yetus Audience Annotations | Major | API |
| [HBASE-18793](https://issues.apache.org/jira/browse/HBASE-18793) | Remove deprecated methods in RegionObserver | Major | Coprocessors |
| [HBASE-18733](https://issues.apache.org/jira/browse/HBASE-18733) | [compat 1-2] Hide WALKey | Major | API |
| [HBASE-16479](https://issues.apache.org/jira/browse/HBASE-16479) | Move WALEdit from hbase.regionserver.wal package to hbase.wal package | Major | wal |
| [HBASE-18783](https://issues.apache.org/jira/browse/HBASE-18783) | Declare the builder of ClusterStatus as IA.Private, and remove the Writables from ClusterStatus | Minor | . |
| [HBASE-18106](https://issues.apache.org/jira/browse/HBASE-18106) | Redo ProcedureInfo and LockInfo | Critical | proc-v2 |
| [HBASE-18780](https://issues.apache.org/jira/browse/HBASE-18780) | Remove HLogPrettyPrinter and hlog command | Minor | documentation, wal |
| [HBASE-18704](https://issues.apache.org/jira/browse/HBASE-18704) | Upgrade hbase to commons-collections 4 | Major | dependencies |
| [HBASE-15607](https://issues.apache.org/jira/browse/HBASE-15607) | Remove PB references from Admin for 2.0 | Blocker | . |
| [HBASE-18736](https://issues.apache.org/jira/browse/HBASE-18736) | Cleanup the HTD/HCD for Admin | Major | . |
| [HBASE-18577](https://issues.apache.org/jira/browse/HBASE-18577) | shaded client includes several non-relocated third party dependencies | Critical | Client |
| [HBASE-3935](https://issues.apache.org/jira/browse/HBASE-3935) | HServerLoad.storefileIndexSizeMB should be changed to storefileIndexSizeKB | Major | . |
| [HBASE-15982](https://issues.apache.org/jira/browse/HBASE-15982) | Interface ReplicationEndpoint extends Guava's Service | Blocker | . |
| [HBASE-18546](https://issues.apache.org/jira/browse/HBASE-18546) | Always overwrite the TS for Append/Increment unless no existing cells are found | Critical | API, Client |
| [HBASE-17442](https://issues.apache.org/jira/browse/HBASE-17442) | Move most of the replication related classes from hbase-client to hbase-replication package | Critical | build, Replication |
| [HBASE-18511](https://issues.apache.org/jira/browse/HBASE-18511) | Default no regions on master | Blocker | master |
| [HBASE-18528](https://issues.apache.org/jira/browse/HBASE-18528) | DON'T allow user to modify the passed table/column descriptor | Critical | Coprocessors, master |
| [HBASE-18469](https://issues.apache.org/jira/browse/HBASE-18469) | Correct RegionServer metric of totalRequestCount | Critical | metrics, regionserver |
| [HBASE-18500](https://issues.apache.org/jira/browse/HBASE-18500) | Performance issue: Don't use BufferedMutator for HTable's put method | Major | . |
| [HBASE-17125](https://issues.apache.org/jira/browse/HBASE-17125) | Inconsistent result when use filter to read data | Critical | . |
| [HBASE-18517](https://issues.apache.org/jira/browse/HBASE-18517) | limit max log message width in log4j | Major | . |
| [HBASE-18502](https://issues.apache.org/jira/browse/HBASE-18502) | Change MasterObserver to use TableDescriptor and ColumnFamilyDescriptor | Critical | Coprocessors, master |
| [HBASE-18374](https://issues.apache.org/jira/browse/HBASE-18374) | RegionServer Metrics improvements | Major | . |
| [HBASE-17908](https://issues.apache.org/jira/browse/HBASE-17908) | Upgrade guava | Critical | dependencies |
| [HBASE-18161](https://issues.apache.org/jira/browse/HBASE-18161) | Incremental Load support for Multiple-Table HFileOutputFormat | Minor | . |
| [HBASE-18267](https://issues.apache.org/jira/browse/HBASE-18267) | The result from the postAppend is ignored | Major | Coprocessors |
| [HBASE-18241](https://issues.apache.org/jira/browse/HBASE-18241) | Change client.Table, client.Admin, Region, Store, and HBaseTestingUtility to not use HTableDescriptor or HColumnDescriptor | Critical | Client |
| [HBASE-18038](https://issues.apache.org/jira/browse/HBASE-18038) | Rename StoreFile to HStoreFile and add a StoreFile interface for CP | Critical | Coprocessors, regionserver |
| [HBASE-16196](https://issues.apache.org/jira/browse/HBASE-16196) | Update jruby to a newer version. | Critical | dependencies, shell |
| [HBASE-14614](https://issues.apache.org/jira/browse/HBASE-14614) | Procedure v2: Core Assignment Manager | Major | proc-v2 |
| [HBASE-3462](https://issues.apache.org/jira/browse/HBASE-3462) | Fix table.jsp in regards to splitting a region/table with an optional splitkey | Major | master |
| [HBASE-11013](https://issues.apache.org/jira/browse/HBASE-11013) | Clone Snapshots on Secure Cluster Should provide option to apply Retained User Permissions | Major | snapshots |
| [HBASE-15296](https://issues.apache.org/jira/browse/HBASE-15296) | Break out writer and reader from StoreFile | Major | regionserver |
| [HBASE-15199](https://issues.apache.org/jira/browse/HBASE-15199) | Move jruby jar so only on hbase-shell module classpath; currently globally available | Critical | dependencies, jruby, shell |
| [HBASE-18009](https://issues.apache.org/jira/browse/HBASE-18009) | Move RpcServer.Call to a separated file | Major | IPC/RPC |
| [HBASE-17956](https://issues.apache.org/jira/browse/HBASE-17956) | Raw scan should ignore TTL | Major | scan |
| [HBASE-17914](https://issues.apache.org/jira/browse/HBASE-17914) | Create a new reader instead of cloning a new StoreFile when compaction | Major | Compaction, regionserver |
| [HBASE-17595](https://issues.apache.org/jira/browse/HBASE-17595) | Add partial result support for small/limited scan | Critical | asyncclient, Client, scan |
| [HBASE-17584](https://issues.apache.org/jira/browse/HBASE-17584) | Expose ScanMetrics with ResultScanner rather than Scan | Major | Client, mapreduce, scan |
| [HBASE-17716](https://issues.apache.org/jira/browse/HBASE-17716) | Formalize Scan Metric names | Minor | metrics |
| [HBASE-17312](https://issues.apache.org/jira/browse/HBASE-17312) | [JDK8] Use default method for Observer Coprocessors | Major | Coprocessors |
| [HBASE-17647](https://issues.apache.org/jira/browse/HBASE-17647) | OffheapKeyValue#heapSize() implementation is wrong | Major | regionserver |
| [HBASE-17472](https://issues.apache.org/jira/browse/HBASE-17472) | Correct the semantic of permission grant | Major | Admin |
| [HBASE-17599](https://issues.apache.org/jira/browse/HBASE-17599) | Use mayHaveMoreCellsInRow instead of isPartial | Major | Client, scan |
| [HBASE-17508](https://issues.apache.org/jira/browse/HBASE-17508) | Unify the implementation of small scan and regular scan for sync client | Major | Client, scan |
| [HBASE-12894](https://issues.apache.org/jira/browse/HBASE-12894) | Upgrade Jetty to 9.2.6 | Critical | REST, UI |
| [HBASE-16786](https://issues.apache.org/jira/browse/HBASE-16786) | Procedure V2 - Move ZK-lock's uses to Procedure framework locks (LockProcedure) | Major | . |
| [HBASE-17470](https://issues.apache.org/jira/browse/HBASE-17470) | Remove merge region code from region server | Major | regionserver |
| [HBASE-5401](https://issues.apache.org/jira/browse/HBASE-5401) | PerformanceEvaluation generates 10x the number of expected mappers | Major | test |
| [HBASE-17221](https://issues.apache.org/jira/browse/HBASE-17221) | Abstract out an interface for RpcServer.Call | Major | . |
| [HBASE-16119](https://issues.apache.org/jira/browse/HBASE-16119) | Procedure v2 - Reimplement merge | Major | proc-v2, Region Assignment |
| [HBASE-17132](https://issues.apache.org/jira/browse/HBASE-17132) | Cleanup deprecated code for WAL | Major | wal |
| [HBASE-17017](https://issues.apache.org/jira/browse/HBASE-17017) | Remove the current per-region latency histogram metrics | Major | metrics |
| [HBASE-15513](https://issues.apache.org/jira/browse/HBASE-15513) | hbase.hregion.memstore.chunkpool.maxsize is 0.0 by default | Major | . |
| [HBASE-16972](https://issues.apache.org/jira/browse/HBASE-16972) | Log more details for Scan#next request when responseTooSlow | Major | Operability |
| [HBASE-16765](https://issues.apache.org/jira/browse/HBASE-16765) | New SteppingRegionSplitPolicy, avoid too aggressive spread of regions for small tables. | Critical | . |
| [HBASE-16747](https://issues.apache.org/jira/browse/HBASE-16747) | Track memstore data size and heap overhead separately | Major | regionserver |
| [HBASE-14551](https://issues.apache.org/jira/browse/HBASE-14551) | Procedure v2 - Reimplement split | Minor | proc-v2 |
| [HBASE-16729](https://issues.apache.org/jira/browse/HBASE-16729) | Define the behavior of (default) empty FilterList | Trivial | . |
| [HBASE-16799](https://issues.apache.org/jira/browse/HBASE-16799) | CP exposed Store should not expose unwanted APIs | Major | . |
| [HBASE-16117](https://issues.apache.org/jira/browse/HBASE-16117) | Fix Connection leak in mapred.TableOutputFormat | Major | mapreduce |
| [HBASE-15638](https://issues.apache.org/jira/browse/HBASE-15638) | Shade protobuf | Critical | Protobufs |
| [HBASE-16257](https://issues.apache.org/jira/browse/HBASE-16257) | Move staging dir to be under hbase root dir | Blocker | . |
| [HBASE-16650](https://issues.apache.org/jira/browse/HBASE-16650) | Wrong usage of BlockCache eviction stat for heap memory tuning | Major | . |
| [HBASE-16598](https://issues.apache.org/jira/browse/HBASE-16598) | Enable zookeeper useMulti always and clean up in HBase code | Major | . |
| [HBASE-15297](https://issues.apache.org/jira/browse/HBASE-15297) | error message is wrong when a wrong namspace is specified in grant in hbase shell | Minor | shell |
| [HBASE-16340](https://issues.apache.org/jira/browse/HBASE-16340) | ensure no Xerces jars included | Critical | dependencies |
| [HBASE-16321](https://issues.apache.org/jira/browse/HBASE-16321) | Ensure findbugs jsr305 jar isn't present | Blocker | dependencies |
| [HBASE-16355](https://issues.apache.org/jira/browse/HBASE-16355) | hbase-client dependency on hbase-common test-jar should be test scope | Major | Client, dependencies |
| [HBASE-16186](https://issues.apache.org/jira/browse/HBASE-16186) | Fix AssignmentManager MBean name | Major | master |
| [HBASE-13823](https://issues.apache.org/jira/browse/HBASE-13823) | Procedure V2: unnecessaery operations on AssignmentManager#recoverTableInDisablingState() and recoverTableInEnablingState() | Major | master, proc-v2 |
| [HBASE-15950](https://issues.apache.org/jira/browse/HBASE-15950) | Fix memstore size estimates to be more tighter | Major | . |
| [HBASE-15971](https://issues.apache.org/jira/browse/HBASE-15971) | Regression: Random Read/WorkloadC slower in 1.x than 0.98 | Critical | rpc |
| [HBASE-15875](https://issues.apache.org/jira/browse/HBASE-15875) | Remove HTable references and HTableInterface | Major | . |
| [HBASE-15610](https://issues.apache.org/jira/browse/HBASE-15610) | Remove deprecated HConnection for 2.0 thus removing all PB references for 2.0 | Blocker | . |
| [HBASE-15876](https://issues.apache.org/jira/browse/HBASE-15876) | Remove doBulkLoad(Path hfofDir, final HTable table) though it has not been through a full deprecation cycle | Blocker | . |
| [HBASE-15575](https://issues.apache.org/jira/browse/HBASE-15575) | Rename table DDL \*Handler methods in MasterObserver to more meaningful names | Minor | Coprocessors |
| [HBASE-15481](https://issues.apache.org/jira/browse/HBASE-15481) | Add pre/post roll to WALObserver | Trivial | . |
| [HBASE-15568](https://issues.apache.org/jira/browse/HBASE-15568) | Procedure V2 - Remove CreateTableHandler in HBase Apache 2.0 release | Major | master, proc-v2 |
| [HBASE-15521](https://issues.apache.org/jira/browse/HBASE-15521) | Procedure V2 - RestoreSnapshot and CloneSnapshot | Major | Client, master, proc-v2 |
| [HBASE-11393](https://issues.apache.org/jira/browse/HBASE-11393) | Replication TableCfs should be a PB object rather than a string | Major | Replication |
| [HBASE-15265](https://issues.apache.org/jira/browse/HBASE-15265) | Implement an asynchronous FSHLog | Major | wal |
| [HBASE-15323](https://issues.apache.org/jira/browse/HBASE-15323) | Hbase Rest CheckAndDeleteAPi should be able to delete more cells | Major | hbase |
| [HBASE-15377](https://issues.apache.org/jira/browse/HBASE-15377) | Per-RS Get metric is time based, per-region metric is size-based | Major | . |
| [HBASE-13963](https://issues.apache.org/jira/browse/HBASE-13963) | avoid leaking jdk.tools | Critical | build, documentation |
| [HBASE-15376](https://issues.apache.org/jira/browse/HBASE-15376) | ScanNext metric is size-based while every other per-operation metric is time based | Major | . |
| [HBASE-15290](https://issues.apache.org/jira/browse/HBASE-15290) | Hbase Rest CheckAndAPI should save other cells along with compared cell | Major | hbase |
| [HBASE-15100](https://issues.apache.org/jira/browse/HBASE-15100) | Master WALProcs still never clean up | Blocker | master, proc-v2 |
| [HBASE-15111](https://issues.apache.org/jira/browse/HBASE-15111) | "hbase version" should write to stdout | Trivial | util |
| [HBASE-14888](https://issues.apache.org/jira/browse/HBASE-14888) | ClusterSchema: Add Namespace Operations | Major | API |
| [HBASE-15018](https://issues.apache.org/jira/browse/HBASE-15018) | Inconsistent way of handling TimeoutException in the rpc client implementations | Major | Client, IPC/RPC |
| [HBASE-14205](https://issues.apache.org/jira/browse/HBASE-14205) | RegionCoprocessorHost System.nanoTime() performance bottleneck | Critical | Coprocessors, Performance, regionserver |
| [HBASE-12751](https://issues.apache.org/jira/browse/HBASE-12751) | Allow RowLock to be reader writer | Major | regionserver |
| [HBASE-13706](https://issues.apache.org/jira/browse/HBASE-13706) | CoprocessorClassLoader should not exempt Hive classes | Minor | Coprocessors |
| [HBASE-13954](https://issues.apache.org/jira/browse/HBASE-13954) | Remove HTableInterface#getRowOrBefore related server side code | Major | API |
| [HBASE-12296](https://issues.apache.org/jira/browse/HBASE-12296) | Filters should work with ByteBufferedCell | Major | regionserver, Scanners |
| [HBASE-14027](https://issues.apache.org/jira/browse/HBASE-14027) | Clean up netty dependencies | Major | build |
| [HBASE-7782](https://issues.apache.org/jira/browse/HBASE-7782) | HBaseTestingUtility.truncateTable() not acting like CLI | Minor | test |
| [HBASE-14047](https://issues.apache.org/jira/browse/HBASE-14047) | Cleanup deprecated APIs from Cell class | Major | Client |
| [HBASE-13849](https://issues.apache.org/jira/browse/HBASE-13849) | Remove restore and clone snapshot from the WebUI | Major | snapshots |
| [HBASE-13646](https://issues.apache.org/jira/browse/HBASE-13646) | HRegion#execService should not try to build incomplete messages | Major | Coprocessors, regionserver |
| [HBASE-13983](https://issues.apache.org/jira/browse/HBASE-13983) | Doc how the oddball HTable methods getStartKey, getEndKey, etc. will be removed in 2.0.0 | Minor | documentation |
| [HBASE-13214](https://issues.apache.org/jira/browse/HBASE-13214) | Remove deprecated and unused methods from HTable class | Major | API |
| [HBASE-13843](https://issues.apache.org/jira/browse/HBASE-13843) | Fix internal constant text in ReplicationManager.java | Trivial | master |
| [HBASE-13375](https://issues.apache.org/jira/browse/HBASE-13375) | Provide HBase superuser higher priority over other users in the RPC handling | Major | IPC/RPC |
| [HBASE-13636](https://issues.apache.org/jira/browse/HBASE-13636) | Remove deprecation for HBASE-4072 (Reading of zoo.cfg) | Major | . |
| [HBASE-10800](https://issues.apache.org/jira/browse/HBASE-10800) | Use CellComparator instead of KVComparator | Major | . |
| [HBASE-13118](https://issues.apache.org/jira/browse/HBASE-13118) | [PE] Add being able to write many columns | Major | test |
| [HBASE-12990](https://issues.apache.org/jira/browse/HBASE-12990) | MetaScanner should be replaced by MetaTableAccessor | Major | Client |
| [HBASE-13373](https://issues.apache.org/jira/browse/HBASE-13373) | Squash HFileReaderV3 together with HFileReaderV2 and AbstractHFileReader; ditto for Scanners and BlockReader, etc. | Major | . |
| [HBASE-10728](https://issues.apache.org/jira/browse/HBASE-10728) | get\_counter value is never used. | Major | . |
| [HBASE-13298](https://issues.apache.org/jira/browse/HBASE-13298) | Clarify if Table.{set\|get}WriteBufferSize() is deprecated or not | Critical | API |
| [HBASE-13248](https://issues.apache.org/jira/browse/HBASE-13248) | Make HConnectionImplementation top-level class. | Major | API |
| [HBASE-13198](https://issues.apache.org/jira/browse/HBASE-13198) | Remove HConnectionManager | Major | API |
| [HBASE-12586](https://issues.apache.org/jira/browse/HBASE-12586) | Task 6 & 7 from HBASE-9117, delete all public HTable constructors and delete ConnectionManager#{delete,get}Connection | Major | . |
| [HBASE-13171](https://issues.apache.org/jira/browse/HBASE-13171) | Change AccessControlClient methods to accept connection object to reduce setup time. | Minor | . |
| [HBASE-6778](https://issues.apache.org/jira/browse/HBASE-6778) | Deprecate Chore; its a thread per task when we should have one thread to do all tasks | Major | . |
| [HBASE-12684](https://issues.apache.org/jira/browse/HBASE-12684) | Add new AsyncRpcClient | Major | Client |
| [HBASE-10378](https://issues.apache.org/jira/browse/HBASE-10378) | Divide HLog interface into User and Implementor specific interfaces | Major | wal |
| [HBASE-12111](https://issues.apache.org/jira/browse/HBASE-12111) | Remove deprecated APIs from Mutation(s) | Major | Client |
| [HBASE-12084](https://issues.apache.org/jira/browse/HBASE-12084) | Remove deprecated APIs from Result | Major | Client |
| [HBASE-12048](https://issues.apache.org/jira/browse/HBASE-12048) | Remove deprecated APIs from Filter | Major | regionserver |
| [HBASE-11556](https://issues.apache.org/jira/browse/HBASE-11556) | Move HTablePool to hbase-thrift module. | Major | Thrift |
| [HBASE-4072](https://issues.apache.org/jira/browse/HBASE-4072) | Deprecate/disable and remove support for reading ZooKeeper zoo.cfg files from the classpath | Major | . |
### IMPORTANT ISSUES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-15780](https://issues.apache.org/jira/browse/HBASE-15780) | Expose AuthUtil as IA.Public | Critical | API, security |
| [HBASE-15322](https://issues.apache.org/jira/browse/HBASE-15322) | Operations using Unsafe path broken for platforms not having sun.misc.Unsafe | Critical | hbase |
| [HBASE-15125](https://issues.apache.org/jira/browse/HBASE-15125) | HBaseFsck's adoptHdfsOrphan function creates region with wrong end key boundary | Major | hbck |
### NEW FEATURES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-19950](https://issues.apache.org/jira/browse/HBASE-19950) | Introduce a ColumnValueFilter | Minor | Filters |
| [HBASE-19844](https://issues.apache.org/jira/browse/HBASE-19844) | Shell should support flush by regionserver | Minor | shell |
| [HBASE-19886](https://issues.apache.org/jira/browse/HBASE-19886) | Display maintenance mode in shell, web UI | Major | . |
| [HBASE-19528](https://issues.apache.org/jira/browse/HBASE-19528) | Major Compaction Tool | Major | . |
| [HBASE-19897](https://issues.apache.org/jira/browse/HBASE-19897) | RowMutations should follow the fluent pattern | Minor | . |
| [HBASE-4224](https://issues.apache.org/jira/browse/HBASE-4224) | Need a flush by regionserver rather than by table option | Major | . |
| [HBASE-15321](https://issues.apache.org/jira/browse/HBASE-15321) | Ability to open a HRegion from hdfs snapshot. | Major | . |
| [HBASE-19799](https://issues.apache.org/jira/browse/HBASE-19799) | Add web UI to rsgroup | Major | rsgroup, UI |
| [HBASE-19326](https://issues.apache.org/jira/browse/HBASE-19326) | Remove decommissioned servers from rsgroup | Major | rsgroup |
| [HBASE-19189](https://issues.apache.org/jira/browse/HBASE-19189) | Ad-hoc test job for running a subset of tests lots of times | Major | build |
| [HBASE-19103](https://issues.apache.org/jira/browse/HBASE-19103) | Add BigDecimalComparator for filter | Minor | Client |
| [HBASE-18171](https://issues.apache.org/jira/browse/HBASE-18171) | Scanning cursor for async client | Major | . |
| [HBASE-18875](https://issues.apache.org/jira/browse/HBASE-18875) | Thrift server supports read-only mode | Major | Thrift |
| [HBASE-14417](https://issues.apache.org/jira/browse/HBASE-14417) | Incremental backup and bulk loading | Blocker | . |
| [HBASE-18131](https://issues.apache.org/jira/browse/HBASE-18131) | Add an hbase shell command to clear deadserver list in ServerManager | Major | Operability |
| [HBASE-15806](https://issues.apache.org/jira/browse/HBASE-15806) | An endpoint-based export tool | Critical | Coprocessors, tooling |
| [HBASE-14135](https://issues.apache.org/jira/browse/HBASE-14135) | HBase Backup/Restore Phase 3: Merge backup images | Critical | . |
| [HBASE-15134](https://issues.apache.org/jira/browse/HBASE-15134) | Add visibility into Flush and Compaction queues | Major | Compaction, metrics, regionserver |
| [HBASE-15968](https://issues.apache.org/jira/browse/HBASE-15968) | New behavior of versions considering mvcc and ts rather than ts only | Major | . |
| [HBASE-15943](https://issues.apache.org/jira/browse/HBASE-15943) | Add page displaying JVM process metrics | Major | Operability, UI |
| [HBASE-17928](https://issues.apache.org/jira/browse/HBASE-17928) | Shell tool to clear compaction queues | Major | Compaction, Operability |
| [HBASE-18226](https://issues.apache.org/jira/browse/HBASE-18226) | Disable reverse DNS lookup at HMaster and use the hostname provided by RegionServer | Major | . |
| [HBASE-13784](https://issues.apache.org/jira/browse/HBASE-13784) | Add Async Client Table API | Major | . |
| [HBASE-17849](https://issues.apache.org/jira/browse/HBASE-17849) | PE tool random read is not totally random | Major | Performance, test |
| [HBASE-15576](https://issues.apache.org/jira/browse/HBASE-15576) | Scanning cursor to prevent blocking long time on ResultScanner.next() | Major | . |
| [HBASE-16961](https://issues.apache.org/jira/browse/HBASE-16961) | FileSystem Quotas | Major | . |
| [HBASE-17757](https://issues.apache.org/jira/browse/HBASE-17757) | Unify blocksize after encoding to decrease memory fragment | Major | . |
| [HBASE-17542](https://issues.apache.org/jira/browse/HBASE-17542) | Move backup system table into separate namespace | Major | . |
| [HBASE-14141](https://issues.apache.org/jira/browse/HBASE-14141) | HBase Backup/Restore Phase 3: Filter WALs on backup to include only edits from backed up tables | Blocker | . |
| [HBASE-17758](https://issues.apache.org/jira/browse/HBASE-17758) | [RSGROUP] Add shell command to move servers and tables at the same time | Major | rsgroup |
| [HBASE-17737](https://issues.apache.org/jira/browse/HBASE-17737) | Thrift2 proxy should support scan timeRange per column family | Major | Thrift |
| [HBASE-16981](https://issues.apache.org/jira/browse/HBASE-16981) | Expand Mob Compaction Partition policy from daily to weekly, monthly | Major | mob |
| [HBASE-9774](https://issues.apache.org/jira/browse/HBASE-9774) | HBase native metrics and metric collection for coprocessors | Major | Coprocessors, metrics |
| [HBASE-17174](https://issues.apache.org/jira/browse/HBASE-17174) | Refactor the AsyncProcess, BufferedMutatorImpl, and HTable | Minor | . |
| [HBASE-15432](https://issues.apache.org/jira/browse/HBASE-15432) | TableInputFormat - support multi column family scan | Major | . |
| [HBASE-17181](https://issues.apache.org/jira/browse/HBASE-17181) | Let HBase thrift2 support TThreadedSelectorServer | Minor | Thrift |
| [HBASE-17151](https://issues.apache.org/jira/browse/HBASE-17151) | New API to create HFile.Reader without instantiating block cache | Major | . |
| [HBASE-16463](https://issues.apache.org/jira/browse/HBASE-16463) | Improve transparent table/CF encryption with Commons Crypto | Major | encryption |
| [HBASE-16751](https://issues.apache.org/jira/browse/HBASE-16751) | Add tuning information to HBase Book | Minor | . |
| [HBASE-16677](https://issues.apache.org/jira/browse/HBASE-16677) | Add table size (total store file size) to table page | Minor | website |
| [HBASE-16447](https://issues.apache.org/jira/browse/HBASE-16447) | Replication by namespaces config in peer | Critical | Replication |
| [HBASE-16388](https://issues.apache.org/jira/browse/HBASE-16388) | Prevent client threads being blocked by only one slow region server | Major | . |
| [HBASE-16213](https://issues.apache.org/jira/browse/HBASE-16213) | A new HFileBlock structure for fast random get | Major | Performance |
| [HBASE-12721](https://issues.apache.org/jira/browse/HBASE-12721) | Create Docker container cluster infrastructure to enable better testing | Major | build, community, documentation, test |
| [HBASE-3727](https://issues.apache.org/jira/browse/HBASE-3727) | MultiHFileOutputFormat | Minor | . |
| [HBASE-15881](https://issues.apache.org/jira/browse/HBASE-15881) | Allow BZIP2 compression | Major | HFile |
| [HBASE-10358](https://issues.apache.org/jira/browse/HBASE-10358) | Shell changes for setting consistency per request | Major | shell |
| [HBASE-15892](https://issues.apache.org/jira/browse/HBASE-15892) | submit-patch.py: Single command line to make patch, upload it to jira, and update review board | Trivial | . |
| [HBASE-15228](https://issues.apache.org/jira/browse/HBASE-15228) | Add the methods to RegionObserver to trigger start/complete restoring WALs | Major | Coprocessors |
| [HBASE-15847](https://issues.apache.org/jira/browse/HBASE-15847) | VerifyReplication prefix filtering | Major | Replication |
| [HBASE-15798](https://issues.apache.org/jira/browse/HBASE-15798) | Add Async RpcChannels to all RpcClients | Major | . |
| [HBASE-15281](https://issues.apache.org/jira/browse/HBASE-15281) | Allow the FileSystem inside HFileSystem to be wrapped | Major | Filesystem Integration, hbase |
| [HBASE-15592](https://issues.apache.org/jira/browse/HBASE-15592) | Print Procedure WAL content | Major | . |
| [HBASE-6721](https://issues.apache.org/jira/browse/HBASE-6721) | RegionServer Group based Assignment | Major | regionserver |
| [HBASE-15136](https://issues.apache.org/jira/browse/HBASE-15136) | Explore different queuing behaviors while busy | Critical | IPC/RPC |
| [HBASE-15181](https://issues.apache.org/jira/browse/HBASE-15181) | A simple implementation of date based tiered compaction | Major | Compaction |
| [HBASE-13259](https://issues.apache.org/jira/browse/HBASE-13259) | mmap() based BucketCache IOEngine | Critical | BlockCache |
| [HBASE-15135](https://issues.apache.org/jira/browse/HBASE-15135) | Add metrics for storefile age | Major | . |
| [HBASE-14355](https://issues.apache.org/jira/browse/HBASE-14355) | Scan different TimeRange for each column family | Major | Client, regionserver, Scanners |
| [HBASE-11262](https://issues.apache.org/jira/browse/HBASE-11262) | Avoid empty columns while doing bulk-load | Major | . |
| [HBASE-15036](https://issues.apache.org/jira/browse/HBASE-15036) | Update HBase Spark documentation to include bulk load with thin records | Major | . |
| [HBASE-14980](https://issues.apache.org/jira/browse/HBASE-14980) | Project Astro | Major | documentation |
| [HBASE-13153](https://issues.apache.org/jira/browse/HBASE-13153) | Bulk Loaded HFile Replication | Major | Replication |
| [HBASE-12911](https://issues.apache.org/jira/browse/HBASE-12911) | Client-side metrics | Major | Client, Operability, Performance |
| [HBASE-14529](https://issues.apache.org/jira/browse/HBASE-14529) | Respond to SIGHUP to reload config | Major | Operability |
| [HBASE-14459](https://issues.apache.org/jira/browse/HBASE-14459) | Add request and response sizes metrics | Major | metrics |
| [HBASE-14456](https://issues.apache.org/jira/browse/HBASE-14456) | Implement a namespace-based region grouping strategy for RegionGroupingProvider | Major | . |
| [HBASE-14154](https://issues.apache.org/jira/browse/HBASE-14154) | DFS Replication should be configurable at column family level | Minor | . |
| [HBASE-13702](https://issues.apache.org/jira/browse/HBASE-13702) | ImportTsv: Add dry-run functionality and log bad rows | Major | . |
| [HBASE-13639](https://issues.apache.org/jira/browse/HBASE-13639) | SyncTable - rsync for HBase tables | Major | mapreduce, Operability, tooling |
| [HBASE-10070](https://issues.apache.org/jira/browse/HBASE-10070) | HBase read high-availability using timeline-consistent region replicas | Major | Admin, API, LatencyResilience |
| [HBASE-13356](https://issues.apache.org/jira/browse/HBASE-13356) | HBase should provide an InputFormat supporting multiple scans in mapreduce jobs over snapshots | Minor | mapreduce |
| [HBASE-5980](https://issues.apache.org/jira/browse/HBASE-5980) | Scanner responses from RS should include metrics on rows/KVs filtered | Minor | Client, metrics, Operability, regionserver |
| [HBASE-13698](https://issues.apache.org/jira/browse/HBASE-13698) | Add RegionLocator methods to Thrift2 proxy. | Major | Thrift |
| [HBASE-13071](https://issues.apache.org/jira/browse/HBASE-13071) | Hbase Streaming Scan Feature | Major | . |
| [HBASE-13090](https://issues.apache.org/jira/browse/HBASE-13090) | Progress heartbeats for long running scanners | Major | . |
| [HBASE-13412](https://issues.apache.org/jira/browse/HBASE-13412) | Region split decisions should have jitter | Major | regionserver |
| [HBASE-12972](https://issues.apache.org/jira/browse/HBASE-12972) | Region, a supportable public/evolving subset of HRegion | Major | . |
| [HBASE-13170](https://issues.apache.org/jira/browse/HBASE-13170) | Allow block cache to be external | Major | io |
| [HBASE-5238](https://issues.apache.org/jira/browse/HBASE-5238) | Add a log4j category for all edits to META/ROOT | Minor | regionserver |
| [HBASE-13063](https://issues.apache.org/jira/browse/HBASE-13063) | Allow to turn off memstore replication for region replicas | Minor | regionserver, Replication |
| [HBASE-13057](https://issues.apache.org/jira/browse/HBASE-13057) | Provide client utility to easily enable and disable table replication | Major | Replication |
| [HBASE-12869](https://issues.apache.org/jira/browse/HBASE-12869) | Add a REST API implementation of the ClusterManager interface | Major | integration tests |
| [HBASE-12944](https://issues.apache.org/jira/browse/HBASE-12944) | Support patches to branches in precommit jenkins build | Major | . |
| [HBASE-12268](https://issues.apache.org/jira/browse/HBASE-12268) | Add support for Scan.setRowPrefixFilter to shell | Major | shell |
| [HBASE-5162](https://issues.apache.org/jira/browse/HBASE-5162) | Basic client pushback mechanism | Major | . |
### IMPROVEMENTS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-19994](https://issues.apache.org/jira/browse/HBASE-19994) | Create a new class for RPC throttling exception, make it retryable. | Major | . |
| [HBASE-20409](https://issues.apache.org/jira/browse/HBASE-20409) | Set hbase.client.meta.operation.timeout in TestClientOperationTimeout | Trivial | test |
| [HBASE-17449](https://issues.apache.org/jira/browse/HBASE-17449) | Add explicit document on different timeout settings | Critical | documentation |
| [HBASE-18784](https://issues.apache.org/jira/browse/HBASE-18784) | Use of filesystem that requires hflush / hsync / append / etc should query outputstream capabilities | Major | Filesystem Integration |
| [HBASE-15466](https://issues.apache.org/jira/browse/HBASE-15466) | precommit should not run all java goals when given a docs-only patch | Major | build |
| [HBASE-20135](https://issues.apache.org/jira/browse/HBASE-20135) | NullPointerException during reading bloom filter when upgraded from hbase-1 to hbase-2 | Minor | . |
| [HBASE-17165](https://issues.apache.org/jira/browse/HBASE-17165) | Add retry to LoadIncrementalHFiles tool | Critical | hbase, HFile, tooling |
| [HBASE-18467](https://issues.apache.org/jira/browse/HBASE-18467) | nightly job needs to run all stages and then comment on jira | Critical | community, test |
| [HBASE-17448](https://issues.apache.org/jira/browse/HBASE-17448) | Export metrics from RecoverableZooKeeper | Major | Zookeeper |
| [HBASE-20055](https://issues.apache.org/jira/browse/HBASE-20055) | Remove declaration of un-thrown exceptions and unused setRegionStateBackToOpen() from MergeTableRegionsProcedure | Minor | amv2 |
| [HBASE-18020](https://issues.apache.org/jira/browse/HBASE-18020) | Update API Compliance Checker to Incorporate Improvements Done in Hadoop | Major | API, community |
| [HBASE-20065](https://issues.apache.org/jira/browse/HBASE-20065) | Revisit the timestamp usage in MetaTableAccessor | Major | . |
| [HBASE-18294](https://issues.apache.org/jira/browse/HBASE-18294) | Reduce global heap pressure: flush based on heap occupancy | Major | . |
| [HBASE-19680](https://issues.apache.org/jira/browse/HBASE-19680) | BufferedMutatorImpl#mutate should wait the result from AP in order to throw the failed mutations | Major | . |
| [HBASE-19988](https://issues.apache.org/jira/browse/HBASE-19988) | HRegion#lockRowsAndBuildMiniBatch() is too chatty when interrupted while waiting for a row lock | Minor | amv2 |
| [HBASE-19915](https://issues.apache.org/jira/browse/HBASE-19915) | From split/ merge procedures daughter/ merged regions get created in OFFLINE state | Major | . |
| [HBASE-19917](https://issues.apache.org/jira/browse/HBASE-19917) | Improve RSGroupBasedLoadBalancer#filterServers() to be more efficient | Minor | rsgroup |
| [HBASE-19904](https://issues.apache.org/jira/browse/HBASE-19904) | Break dependency of WAL constructor on Replication | Major | Replication, wal |
| [HBASE-19912](https://issues.apache.org/jira/browse/HBASE-19912) | The flag "writeToWAL" of Region#checkAndRowMutate is useless | Minor | . |
| [HBASE-19861](https://issues.apache.org/jira/browse/HBASE-19861) | Avoid using RPCs when querying table infos for master status pages | Major | UI |
| [HBASE-19770](https://issues.apache.org/jira/browse/HBASE-19770) | Add '--return-values' option to Shell to print return values of commands in interactive mode | Critical | shell |
| [HBASE-19823](https://issues.apache.org/jira/browse/HBASE-19823) | Make RawCellBuilderFactory LimitedPrivate.UNITTEST | Minor | . |
| [HBASE-19820](https://issues.apache.org/jira/browse/HBASE-19820) | Restore public constructor of MiniHBaseCluster (API compat) | Major | . |
| [HBASE-19736](https://issues.apache.org/jira/browse/HBASE-19736) | Remove BaseLogCleanerDelegate deprecated #isLogDeletable(FileStatus) and use #isFileDeletable(FileStatus) instead | Minor | . |
| [HBASE-19739](https://issues.apache.org/jira/browse/HBASE-19739) | Include thrift IDL files in HBase binary distribution | Minor | Thrift |
| [HBASE-19789](https://issues.apache.org/jira/browse/HBASE-19789) | Not exclude flaky tests from nightly builds | Major | . |
| [HBASE-19758](https://issues.apache.org/jira/browse/HBASE-19758) | Split TestHCM to several smaller tests | Major | test |
| [HBASE-19751](https://issues.apache.org/jira/browse/HBASE-19751) | Use RegionInfo directly instead of an identifier and a namespace when getting WAL | Major | wal |
| [HBASE-19139](https://issues.apache.org/jira/browse/HBASE-19139) | Create Async Admin methods for Clear Block Cache | Major | Admin |
| [HBASE-19702](https://issues.apache.org/jira/browse/HBASE-19702) | Improve RSGroupInfo constructors | Minor | . |
| [HBASE-19684](https://issues.apache.org/jira/browse/HBASE-19684) | BlockCacheKey toString Performance | Trivial | hbase |
| [HBASE-19358](https://issues.apache.org/jira/browse/HBASE-19358) | Improve the stability of splitting log when do fail over | Major | MTTR |
| [HBASE-19723](https://issues.apache.org/jira/browse/HBASE-19723) | hbase-thrift declares slf4j-api twice | Trivial | Thrift |
| [HBASE-19651](https://issues.apache.org/jira/browse/HBASE-19651) | Remove LimitInputStream | Minor | hbase |
| [HBASE-19473](https://issues.apache.org/jira/browse/HBASE-19473) | Miscellaneous changes to ClientScanner | Trivial | hbase |
| [HBASE-19613](https://issues.apache.org/jira/browse/HBASE-19613) | Miscellaneous changes to WALSplitter | Trivial | hbase |
| [HBASE-18806](https://issues.apache.org/jira/browse/HBASE-18806) | VerifyRep by snapshot need not to restore snapshot for each mapper | Major | Replication |
| [HBASE-18011](https://issues.apache.org/jira/browse/HBASE-18011) | Refactor RpcServer | Major | IPC/RPC |
| [HBASE-19641](https://issues.apache.org/jira/browse/HBASE-19641) | AsyncHBaseAdmin should use exponential backoff when polling the procedure result | Major | asyncclient, proc-v2 |
| [HBASE-19675](https://issues.apache.org/jira/browse/HBASE-19675) | Miscellaneous HStore Class Improvements | Minor | hbase |
| [HBASE-19683](https://issues.apache.org/jira/browse/HBASE-19683) | Remove Superfluous Methods From String Class | Trivial | hbase |
| [HBASE-19676](https://issues.apache.org/jira/browse/HBASE-19676) | CleanerChore logging improvements | Trivial | hbase |
| [HBASE-19486](https://issues.apache.org/jira/browse/HBASE-19486) | Periodically ensure records are not buffered too long by BufferedMutator | Major | Client |
| [HBASE-19679](https://issues.apache.org/jira/browse/HBASE-19679) | Superusers Logging and Data Structures | Trivial | hbase |
| [HBASE-19677](https://issues.apache.org/jira/browse/HBASE-19677) | Miscellaneous HFileCleaner Improvements | Trivial | hbase |
| [HBASE-19649](https://issues.apache.org/jira/browse/HBASE-19649) | Use singleton feature for ImmutableSegment | Trivial | . |
| [HBASE-8518](https://issues.apache.org/jira/browse/HBASE-8518) | Get rid of hbase.hstore.compaction.complete setting | Minor | . |
| [HBASE-19659](https://issues.apache.org/jira/browse/HBASE-19659) | Enable -x in make\_rc.sh so logs where it is in execution | Trivial | build |
| [HBASE-19647](https://issues.apache.org/jira/browse/HBASE-19647) | Logging cleanups; emit regionname when RegionTooBusyException inside RetriesExhausted... make netty connect/disconnect TRACE-level | Major | . |
| [HBASE-19545](https://issues.apache.org/jira/browse/HBASE-19545) | Replace getBytes(StandardCharsets.UTF\_8) with Bytes.toBytes | Minor | . |
| [HBASE-19615](https://issues.apache.org/jira/browse/HBASE-19615) | CompositeImmutableSegment ArrayList Instead of LinkedList | Trivial | hbase |
| [HBASE-19621](https://issues.apache.org/jira/browse/HBASE-19621) | Revisit the methods in ReplicationPeerConfigBuilder | Minor | . |
| [HBASE-19618](https://issues.apache.org/jira/browse/HBASE-19618) | Remove replicationQueuesClient.class/replicationQueues.class config and remove table based ReplicationQueuesClient/ReplicationQueues implementation | Major | . |
| [HBASE-19576](https://issues.apache.org/jira/browse/HBASE-19576) | Introduce builder for ReplicationPeerConfig and make it immutable | Major | . |
| [HBASE-19590](https://issues.apache.org/jira/browse/HBASE-19590) | Remove the duplicate code in deprecated ReplicationAdmin | Minor | . |
| [HBASE-19570](https://issues.apache.org/jira/browse/HBASE-19570) | Add hadoop3 tests to Nightly master/branch-2 runs | Critical | . |
| [HBASE-19571](https://issues.apache.org/jira/browse/HBASE-19571) | Minor refactor of Nightly run scripts | Minor | . |
| [HBASE-19491](https://issues.apache.org/jira/browse/HBASE-19491) | Exclude flaky tests from nightly master run | Major | . |
| [HBASE-15482](https://issues.apache.org/jira/browse/HBASE-15482) | Provide an option to skip calculating block locations for SnapshotInputFormat | Minor | mapreduce |
| [HBASE-19531](https://issues.apache.org/jira/browse/HBASE-19531) | Remove needless volatile declaration | Trivial | . |
| [HBASE-19521](https://issues.apache.org/jira/browse/HBASE-19521) | HBase mob compaction need to check hfile version | Critical | Compaction, mob |
| [HBASE-14790](https://issues.apache.org/jira/browse/HBASE-14790) | Implement a new DFSOutputStream for logging WAL only | Major | wal |
| [HBASE-19472](https://issues.apache.org/jira/browse/HBASE-19472) | Remove ArrayUtil Class | Major | hbase |
| [HBASE-19489](https://issues.apache.org/jira/browse/HBASE-19489) | Check against only the latest maintenance release in pre-commit hadoopcheck. | Minor | . |
| [HBASE-17425](https://issues.apache.org/jira/browse/HBASE-17425) | Fix calls to deprecated APIs in TestUpdateConfiguration | Trivial | Client |
| [HBASE-19464](https://issues.apache.org/jira/browse/HBASE-19464) | Replace StringBuffer with StringBuilder for hbase-common | Trivial | hbase |
| [HBASE-19463](https://issues.apache.org/jira/browse/HBASE-19463) | Make CPEnv#getConnection return a facade that throws Unsupported if CP calls #close | Major | Coprocessors |
| [HBASE-19180](https://issues.apache.org/jira/browse/HBASE-19180) | Remove unused imports from AlwaysPasses | Trivial | build |
| [HBASE-18169](https://issues.apache.org/jira/browse/HBASE-18169) | Coprocessor fix and cleanup before 2.0.0 release | Blocker | Coprocessors |
| [HBASE-19448](https://issues.apache.org/jira/browse/HBASE-19448) | Replace StringBuffer with StringBuilder for hbase-server | Trivial | hbase |
| [HBASE-19432](https://issues.apache.org/jira/browse/HBASE-19432) | Roll the specified writer in HFileOutputFormat2 | Major | . |
| [HBASE-19290](https://issues.apache.org/jira/browse/HBASE-19290) | Reduce zk request when doing split log | Major | . |
| [HBASE-19336](https://issues.apache.org/jira/browse/HBASE-19336) | Improve rsgroup to allow assign all tables within a specified namespace by only writing namespace | Major | rsgroup |
| [HBASE-19367](https://issues.apache.org/jira/browse/HBASE-19367) | Refactoring in RegionStates, and RSProcedureDispatcher | Minor | . |
| [HBASE-19382](https://issues.apache.org/jira/browse/HBASE-19382) | Update report-flakies.py script to handle yetus builds | Major | . |
| [HBASE-19252](https://issues.apache.org/jira/browse/HBASE-19252) | Move the transform logic of FilterList into transformCell() method to avoid extra ref to question cell | Minor | . |
| [HBASE-19372](https://issues.apache.org/jira/browse/HBASE-19372) | Remove the Span object in SyncFuture as it is useless now | Major | tracing, wal |
| [HBASE-18090](https://issues.apache.org/jira/browse/HBASE-18090) | Improve TableSnapshotInputFormat to allow more multiple mappers per region | Major | mapreduce |
| [HBASE-16868](https://issues.apache.org/jira/browse/HBASE-16868) | Add a replicate\_all flag to avoid misuse the namespaces and table-cfs config of replication peer | Critical | Replication |
| [HBASE-19311](https://issues.apache.org/jira/browse/HBASE-19311) | Promote TestAcidGuarantees to LargeTests and start mini cluster once to make it faster | Major | test |
| [HBASE-19293](https://issues.apache.org/jira/browse/HBASE-19293) | Support adding a new replication peer in disabled state | Major | . |
| [HBASE-16574](https://issues.apache.org/jira/browse/HBASE-16574) | Add backup / restore feature to refguide | Major | . |
| [HBASE-19274](https://issues.apache.org/jira/browse/HBASE-19274) | Log IOException when unable to determine the size of committed file | Trivial | . |
| [HBASE-19251](https://issues.apache.org/jira/browse/HBASE-19251) | Merge RawAsyncTable and AsyncTable | Major | asyncclient, Client |
| [HBASE-19262](https://issues.apache.org/jira/browse/HBASE-19262) | Revisit checkstyle rules | Major | build |
| [HBASE-18601](https://issues.apache.org/jira/browse/HBASE-18601) | Update Htrace to 4.2 | Major | dependencies, tracing |
| [HBASE-19227](https://issues.apache.org/jira/browse/HBASE-19227) | Nightly jobs should archive JVM dumpstream files | Critical | build |
| [HBASE-12350](https://issues.apache.org/jira/browse/HBASE-12350) | Backport error-prone build support to branch-1 and branch-2 | Minor | . |
| [HBASE-19228](https://issues.apache.org/jira/browse/HBASE-19228) | nightly job should gather machine stats. | Major | build |
| [HBASE-19186](https://issues.apache.org/jira/browse/HBASE-19186) | Unify to use bytes to show size in master/rs ui | Minor | . |
| [HBASE-19027](https://issues.apache.org/jira/browse/HBASE-19027) | Honor the CellComparator of ScanInfo in scanning over a store | Major | . |
| [HBASE-13622](https://issues.apache.org/jira/browse/HBASE-13622) | document upgrade rollback | Major | documentation |
| [HBASE-18925](https://issues.apache.org/jira/browse/HBASE-18925) | Need updated mockito for using java optional | Major | . |
| [HBASE-19140](https://issues.apache.org/jira/browse/HBASE-19140) | hbase-cleanup.sh uses deprecated call to remove files in hdfs | Trivial | scripts |
| [HBASE-17065](https://issues.apache.org/jira/browse/HBASE-17065) | Perform more effective sorting for RPC Handler Tasks | Minor | . |
| [HBASE-18870](https://issues.apache.org/jira/browse/HBASE-18870) | Hbase Backup should set the details to MR job name | Minor | . |
| [HBASE-18602](https://issues.apache.org/jira/browse/HBASE-18602) | rsgroup cleanup unassign code | Minor | rsgroup |
| [HBASE-19110](https://issues.apache.org/jira/browse/HBASE-19110) | Add default for Server#isStopping & #getFileSystem | Minor | . |
| [HBASE-19091](https://issues.apache.org/jira/browse/HBASE-19091) | Code annotation wrote "BinaryComparator" instead of "LongComparator" | Minor | Client |
| [HBASE-18994](https://issues.apache.org/jira/browse/HBASE-18994) | Decide if META/System tables should use Compacting Memstore or Default Memstore | Major | . |
| [HBASE-19051](https://issues.apache.org/jira/browse/HBASE-19051) | Add new split algorithm for num string | Minor | . |
| [HBASE-18824](https://issues.apache.org/jira/browse/HBASE-18824) | Add meaningful comment to HConstants.LATEST\_TIMESTAMP to explain why it is MAX\_VALUE | Minor | . |
| [HBASE-10367](https://issues.apache.org/jira/browse/HBASE-10367) | RegionServer graceful stop / decommissioning | Major | . |
| [HBASE-18986](https://issues.apache.org/jira/browse/HBASE-18986) | Remove unnecessary null check after CellUtil.cloneQualifier() | Minor | . |
| [HBASE-15410](https://issues.apache.org/jira/browse/HBASE-15410) | Utilize the max seek value when all Filters in MUST\_PASS\_ALL FilterList return SEEK\_NEXT\_USING\_HINT | Major | . |
| [HBASE-18843](https://issues.apache.org/jira/browse/HBASE-18843) | Add DistCp support to incremental backup with bulk loading | Major | . |
| [HBASE-16010](https://issues.apache.org/jira/browse/HBASE-16010) | Put draining function through Admin API | Minor | . |
| [HBASE-18899](https://issues.apache.org/jira/browse/HBASE-18899) | Make Fileinfo more readable in HFilePrettyPrinter | Major | HFile |
| [HBASE-16894](https://issues.apache.org/jira/browse/HBASE-16894) | Create more than 1 split per region, generalize HBASE-12590 | Major | . |
| [HBASE-18929](https://issues.apache.org/jira/browse/HBASE-18929) | Hbase backup command doesn’t show debug option to enable backup in debug mode | Minor | . |
| [HBASE-18814](https://issues.apache.org/jira/browse/HBASE-18814) | Make ScanMetrics enabled and add counter \<HBase Counters, ROWS\_SCANNED\> into the MapReduce Job over snapshot | Minor | mapreduce |
| [HBASE-18559](https://issues.apache.org/jira/browse/HBASE-18559) | Add histogram to MetricsConnection to track concurrent calls per server | Minor | Client |
| [HBASE-18436](https://issues.apache.org/jira/browse/HBASE-18436) | Add client-side hedged read metrics | Minor | . |
| [HBASE-13844](https://issues.apache.org/jira/browse/HBASE-13844) | Move static helper methods from KeyValue into CellUtils | Minor | . |
| [HBASE-18884](https://issues.apache.org/jira/browse/HBASE-18884) | Coprocessor Design Improvements follow up of HBASE-17732 | Major | Coprocessors |
| [HBASE-18652](https://issues.apache.org/jira/browse/HBASE-18652) | Expose individual cache stats in a CombinedCache through JMX | Major | regionserver |
| [HBASE-18651](https://issues.apache.org/jira/browse/HBASE-18651) | Let ChaosMonkeyRunner expose the chaos monkey runner it creates | Major | . |
| [HBASE-11462](https://issues.apache.org/jira/browse/HBASE-11462) | MetaTableAccessor shouldn't use ZooKeeeper | Major | Client, Zookeeper |
| [HBASE-18478](https://issues.apache.org/jira/browse/HBASE-18478) | Allow users to remove RegionFinder from LoadBalancer calculations if no locality possible | Major | Balancer |
| [HBASE-18849](https://issues.apache.org/jira/browse/HBASE-18849) | expand "thirdparty" reference to give examples of setting netty location in common testing modules | Critical | documentation, thirdparty |
| [HBASE-18609](https://issues.apache.org/jira/browse/HBASE-18609) | Apply ClusterStatus#getClusterStatus(EnumSet\<Option\>) in code base | Major | . |
| [HBASE-18795](https://issues.apache.org/jira/browse/HBASE-18795) | Expose KeyValue.getBuffer() for tests alone | Major | . |
| [HBASE-18772](https://issues.apache.org/jira/browse/HBASE-18772) | [JDK8] Replace AtomicLong with LongAdder | Trivial | . |
| [HBASE-14996](https://issues.apache.org/jira/browse/HBASE-14996) | Some more API cleanup for 2.0 | Blocker | . |
| [HBASE-18683](https://issues.apache.org/jira/browse/HBASE-18683) | Upgrade hbase to commons-math 3 | Major | . |
| [HBASE-13271](https://issues.apache.org/jira/browse/HBASE-13271) | Table#puts(List\<Put\>) operation is indeterminate; needs fixing | Critical | API |
| [HBASE-10240](https://issues.apache.org/jira/browse/HBASE-10240) | Remove 0.94-\>0.96 migration code | Critical | . |
| [HBASE-18662](https://issues.apache.org/jira/browse/HBASE-18662) | The default values for many configuration items in the code are not consistent with hbase-default.xml | Minor | . |
| [HBASE-18621](https://issues.apache.org/jira/browse/HBASE-18621) | Refactor ClusterOptions before applying to code base | Major | . |
| [HBASE-18778](https://issues.apache.org/jira/browse/HBASE-18778) | Use Comparator for StealJobQueue | Major | Compaction |
| [HBASE-18737](https://issues.apache.org/jira/browse/HBASE-18737) | Display configured max size of memstore and cache on RS UI | Minor | . |
| [HBASE-18674](https://issues.apache.org/jira/browse/HBASE-18674) | upgrade hbase to commons-lang3 | Major | . |
| [HBASE-18746](https://issues.apache.org/jira/browse/HBASE-18746) | Throw exception with job.getStatus().getFailureInfo() when ExportSnapshot fails | Minor | mapreduce, snapshots |
| [HBASE-18740](https://issues.apache.org/jira/browse/HBASE-18740) | Upgrade Zookeeper version to 3.4.10 | Major | . |
| [HBASE-18699](https://issues.apache.org/jira/browse/HBASE-18699) | Copy LoadIncrementalHFiles to another package and mark the old one as deprecated | Major | mapreduce |
| [HBASE-18675](https://issues.apache.org/jira/browse/HBASE-18675) | Making {max,min}SessionTimeout configurable for MiniZooKeeperCluster | Minor | test, Zookeeper |
| [HBASE-17826](https://issues.apache.org/jira/browse/HBASE-17826) | Backup: submit M/R job to a particular Yarn queue | Major | . |
| [HBASE-18677](https://issues.apache.org/jira/browse/HBASE-18677) | typo in namespace docs | Trivial | documentation |
| [HBASE-18701](https://issues.apache.org/jira/browse/HBASE-18701) | Optimize reference guide to use cell acl conveniently | Trivial | . |
| [HBASE-18519](https://issues.apache.org/jira/browse/HBASE-18519) | Use builder pattern to create cell | Major | . |
| [HBASE-18673](https://issues.apache.org/jira/browse/HBASE-18673) | Some more unwanted reference to unshaded PB classes | Minor | . |
| [HBASE-18224](https://issues.apache.org/jira/browse/HBASE-18224) | Upgrade jetty | Critical | dependencies |
| [HBASE-18532](https://issues.apache.org/jira/browse/HBASE-18532) | Improve cache related stats rendered on RS UI | Major | regionserver, UI |
| [HBASE-18629](https://issues.apache.org/jira/browse/HBASE-18629) | Enhance ChaosMonkeyRunner with interruptibility | Major | . |
| [HBASE-18631](https://issues.apache.org/jira/browse/HBASE-18631) | Allow configuration of ChaosMonkey properties via hbase-site | Minor | integration tests |
| [HBASE-18573](https://issues.apache.org/jira/browse/HBASE-18573) | Update Append and Delete to use Mutation#getCellList(family) | Minor | . |
| [HBASE-18251](https://issues.apache.org/jira/browse/HBASE-18251) | Remove unnecessary traversing to the first and last keys in the CellSet | Major | . |
| [HBASE-18581](https://issues.apache.org/jira/browse/HBASE-18581) | Remove dead code and some tidy up in BaseLoadBalancer | Minor | Balancer |
| [HBASE-18504](https://issues.apache.org/jira/browse/HBASE-18504) | Add documentation for WAL compression | Minor | documentation |
| [HBASE-17064](https://issues.apache.org/jira/browse/HBASE-17064) | Add TaskMonitor#getTasks() variant which accepts type selection | Minor | . |
| [HBASE-2631](https://issues.apache.org/jira/browse/HBASE-2631) | Decide between "InMB" and "MB" as suffix for field names in ClusterStatus objects | Minor | . |
| [HBASE-18533](https://issues.apache.org/jira/browse/HBASE-18533) | Expose BucketCache values to be configured | Major | BucketCache |
| [HBASE-18303](https://issues.apache.org/jira/browse/HBASE-18303) | Clean up some parameterized test declarations | Minor | test |
| [HBASE-18522](https://issues.apache.org/jira/browse/HBASE-18522) | Add RowMutations support to Batch | Major | . |
| [HBASE-18566](https://issues.apache.org/jira/browse/HBASE-18566) | [RSGROUP]Log the client IP/port of the rsgroup admin | Major | rsgroup |
| [HBASE-15511](https://issues.apache.org/jira/browse/HBASE-15511) | ClusterStatus should be able to return responses by scope | Major | . |
| [HBASE-18555](https://issues.apache.org/jira/browse/HBASE-18555) | Remove redundant familyMap.put() from addxxx() of sub-classes of Mutation and Query | Minor | Client |
| [HBASE-18387](https://issues.apache.org/jira/browse/HBASE-18387) | [Thrift] Make principal configurable in DemoClient.java | Minor | . |
| [HBASE-18548](https://issues.apache.org/jira/browse/HBASE-18548) | Move sources of important Jenkins jobs into source control | Critical | documentation, scripts |
| [HBASE-18248](https://issues.apache.org/jira/browse/HBASE-18248) | Warn if monitored RPC task has been tied up beyond a configurable threshold | Major | . |
| [HBASE-18485](https://issues.apache.org/jira/browse/HBASE-18485) | Performance issue: ClientAsyncPrefetchScanner is slower than ClientSimpleScanner | Major | . |
| [HBASE-18426](https://issues.apache.org/jira/browse/HBASE-18426) | nightly job should use independent stages to check supported jdks | Critical | community, test |
| [HBASE-14220](https://issues.apache.org/jira/browse/HBASE-14220) | nightly tests should verify src tgz generates and builds correctly | Minor | build |
| [HBASE-18520](https://issues.apache.org/jira/browse/HBASE-18520) | Add jmx value to determine true Master Start time | Minor | metrics |
| [HBASE-16893](https://issues.apache.org/jira/browse/HBASE-16893) | Use Collection.removeIf instead of Iterator.remove in DependentColumnFilter | Minor | . |
| [HBASE-16116](https://issues.apache.org/jira/browse/HBASE-16116) | Remove redundant pattern \*.iml | Trivial | . |
| [HBASE-18261](https://issues.apache.org/jira/browse/HBASE-18261) | [AMv2] Create new RecoverMetaProcedure and use it from ServerCrashProcedure and HMaster.finishActiveMasterInitialization() | Major | amv2 |
| [HBASE-18402](https://issues.apache.org/jira/browse/HBASE-18402) | Thrift2 should support DeleteFamilyVersion type | Major | Thrift |
| [HBASE-18434](https://issues.apache.org/jira/browse/HBASE-18434) | Address some alerts raised by lgtm.com | Major | . |
| [HBASE-18023](https://issues.apache.org/jira/browse/HBASE-18023) | Log multi-\* requests for more than threshold number of rows | Minor | regionserver |
| [HBASE-15816](https://issues.apache.org/jira/browse/HBASE-15816) | Provide client with ability to set priority on Operations | Major | . |
| [HBASE-18389](https://issues.apache.org/jira/browse/HBASE-18389) | Remove byte[] from formal parameter of sizeOf() of ClassSize, ClassSize.MemoryLayout and ClassSize.UnsafeLayout | Minor | util |
| [HBASE-18412](https://issues.apache.org/jira/browse/HBASE-18412) | [Shell] Support unset of list of configuration for a table | Minor | . |
| [HBASE-16312](https://issues.apache.org/jira/browse/HBASE-16312) | update jquery version | Critical | dependencies, UI |
| [HBASE-18332](https://issues.apache.org/jira/browse/HBASE-18332) | Upgrade asciidoctor-maven-plugin | Minor | website |
| [HBASE-18339](https://issues.apache.org/jira/browse/HBASE-18339) | Update test-patch to use hadoop 3.0.0-alpha4 | Major | test |
| [HBASE-18004](https://issues.apache.org/jira/browse/HBASE-18004) | getRegionLocations needs to be called once in ScannerCallableWithReplicas#call() | Minor | Client |
| [HBASE-18307](https://issues.apache.org/jira/browse/HBASE-18307) | Share the same EventLoopGroup for NettyRpcServer, NettyRpcClient and AsyncFSWALProvider at RS side | Major | io, rpc, wal |
| [HBASE-18083](https://issues.apache.org/jira/browse/HBASE-18083) | Make large/small file clean thread number configurable in HFileCleaner | Major | . |
| [HBASE-16730](https://issues.apache.org/jira/browse/HBASE-16730) | Exclude junit as a transitive dependency from hadoop-common | Trivial | hbase |
| [HBASE-15062](https://issues.apache.org/jira/browse/HBASE-15062) | IntegrationTestMTTR conditionally run some tests | Minor | integration tests |
| [HBASE-11707](https://issues.apache.org/jira/browse/HBASE-11707) | Using Map instead of list in FailedServers of RpcClient | Minor | Client |
| [HBASE-18286](https://issues.apache.org/jira/browse/HBASE-18286) | Create static empty byte array to save memory | Trivial | community |
| [HBASE-17995](https://issues.apache.org/jira/browse/HBASE-17995) | improve log messages during snapshot related tests | Trivial | integration tests, mapreduce, snapshots, test |
| [HBASE-15391](https://issues.apache.org/jira/browse/HBASE-15391) | Avoid too large "deleted from META" info log | Minor | . |
| [HBASE-16585](https://issues.apache.org/jira/browse/HBASE-16585) | Rewrite the delegation token tests with Parameterized pattern | Major | security, test |
| [HBASE-13197](https://issues.apache.org/jira/browse/HBASE-13197) | Connection API cleanup | Major | API |
| [HBASE-15756](https://issues.apache.org/jira/browse/HBASE-15756) | Pluggable RpcServer | Critical | Performance, rpc |
| [HBASE-17110](https://issues.apache.org/jira/browse/HBASE-17110) | Improve SimpleLoadBalancer to always take server-level balance into account | Major | Balancer |
| [HBASE-18022](https://issues.apache.org/jira/browse/HBASE-18022) | Refine the error message issued with TableNotFoundException when expected table is not the same as the one fetched from meta | Minor | . |
| [HBASE-18281](https://issues.apache.org/jira/browse/HBASE-18281) | Performance update in StoreFileWriter.java for string replacement | Trivial | community |
| [HBASE-18041](https://issues.apache.org/jira/browse/HBASE-18041) | Add pylintrc file to HBase | Major | community |
| [HBASE-18275](https://issues.apache.org/jira/browse/HBASE-18275) | Formatting and grammar mistakes in schemadoc chapter | Trivial | documentation |
| [HBASE-18164](https://issues.apache.org/jira/browse/HBASE-18164) | Much faster locality cost function and candidate generator | Critical | Balancer |
| [HBASE-16351](https://issues.apache.org/jira/browse/HBASE-16351) | do dependency license check via enforcer plugin | Major | build, dependencies |
| [HBASE-18252](https://issues.apache.org/jira/browse/HBASE-18252) | Resolve BaseLoadBalancer bad practice warnings | Minor | . |
| [HBASE-18033](https://issues.apache.org/jira/browse/HBASE-18033) | Update supplemental models for new deps in Hadoop trunk | Critical | dependencies |
| [HBASE-17959](https://issues.apache.org/jira/browse/HBASE-17959) | Canary timeout should be configurable on a per-table basis | Minor | canary |
| [HBASE-17777](https://issues.apache.org/jira/browse/HBASE-17777) | TestMemstoreLAB#testLABThreading runs too long for a small test | Minor | test |
| [HBASE-18101](https://issues.apache.org/jira/browse/HBASE-18101) | Fix type mismatch on container access in QuotaCache#chore | Trivial | . |
| [HBASE-18001](https://issues.apache.org/jira/browse/HBASE-18001) | Extend the "count" shell command to support specified conditions | Minor | shell |
| [HBASE-18094](https://issues.apache.org/jira/browse/HBASE-18094) | Display the return value of the command append | Major | shell |
| [HBASE-18075](https://issues.apache.org/jira/browse/HBASE-18075) | Support namespaces and tables with non-latin alphabetical characters | Major | Client |
| [HBASE-18067](https://issues.apache.org/jira/browse/HBASE-18067) | Support a default converter for data read shell commands | Minor | shell |
| [HBASE-18019](https://issues.apache.org/jira/browse/HBASE-18019) | Close redundant memstore scanners | Major | . |
| [HBASE-17910](https://issues.apache.org/jira/browse/HBASE-17910) | Use separated StoreFileReader for streaming read | Major | regionserver, scan, Scanners |
| [HBASE-18043](https://issues.apache.org/jira/browse/HBASE-18043) | Institute a hard limit for individual cell size that cannot be overridden by clients | Major | IPC/RPC, regionserver |
| [HBASE-17343](https://issues.apache.org/jira/browse/HBASE-17343) | Make Compacting Memstore default in 2.0 with BASIC as the default type | Blocker | regionserver |
| [HBASE-18021](https://issues.apache.org/jira/browse/HBASE-18021) | Add more info in timed out RetriesExhaustedException for read replica client get processing, | Minor | Client |
| [HBASE-18017](https://issues.apache.org/jira/browse/HBASE-18017) | Reduce frequency of setStoragePolicy failure warnings | Minor | . |
| [HBASE-14925](https://issues.apache.org/jira/browse/HBASE-14925) | Develop HBase shell command/tool to list table's region info through command line | Major | shell |
| [HBASE-17924](https://issues.apache.org/jira/browse/HBASE-17924) | Consider sorting the row order when processing multi() ops before taking rowlocks | Major | . |
| [HBASE-18015](https://issues.apache.org/jira/browse/HBASE-18015) | Storage class aware block placement for procedure v2 WALs | Minor | . |
| [HBASE-18007](https://issues.apache.org/jira/browse/HBASE-18007) | Clean up rest module code | Trivial | . |
| [HBASE-17990](https://issues.apache.org/jira/browse/HBASE-17990) | Refactor TestFSUtils to use Before | Trivial | . |
| [HBASE-16466](https://issues.apache.org/jira/browse/HBASE-16466) | HBase snapshots support in VerifyReplication tool to reduce load on live HBase cluster with large tables | Major | hbase |
| [HBASE-12870](https://issues.apache.org/jira/browse/HBASE-12870) | "Major compaction triggered" and "Skipping major compaction" messages lack the region information | Major | Compaction |
| [HBASE-17973](https://issues.apache.org/jira/browse/HBASE-17973) | Create shell command to identify regions with poor locality | Major | shell |
| [HBASE-17979](https://issues.apache.org/jira/browse/HBASE-17979) | HBase Shell 'list' Command Help Doc Improvements | Minor | shell |
| [HBASE-17875](https://issues.apache.org/jira/browse/HBASE-17875) | Document why objects over 10MB are not well-suited for hbase | Major | documentation, mob |
| [HBASE-8486](https://issues.apache.org/jira/browse/HBASE-8486) | IS\_ROOT isnt needed in HTableDescriptor. | Minor | . |
| [HBASE-17817](https://issues.apache.org/jira/browse/HBASE-17817) | Make Regionservers log which tables it removed coprocessors from when aborting | Major | Coprocessors, regionserver |
| [HBASE-17835](https://issues.apache.org/jira/browse/HBASE-17835) | Spelling mistakes in the Java source | Trivial | documentation |
| [HBASE-17962](https://issues.apache.org/jira/browse/HBASE-17962) | Improve documentation on Rest interface | Trivial | documentation, REST |
| [HBASE-17877](https://issues.apache.org/jira/browse/HBASE-17877) | Improve HBase's byte[] comparator | Major | util |
| [HBASE-9899](https://issues.apache.org/jira/browse/HBASE-9899) | for idempotent operation dups, return the result instead of throwing conflict exception | Major | . |
| [HBASE-17514](https://issues.apache.org/jira/browse/HBASE-17514) | Warn when Thrift Server 1 is configured for proxy users but not the HTTP transport | Minor | Thrift, Usability |
| [HBASE-17944](https://issues.apache.org/jira/browse/HBASE-17944) | Removed unused JDK version parsing from ClassSize. | Minor | build |
| [HBASE-17912](https://issues.apache.org/jira/browse/HBASE-17912) | Avoid major compactions on region server startup | Major | Compaction |
| [HBASE-17888](https://issues.apache.org/jira/browse/HBASE-17888) | Add generic methods for updating metrics on start and end of a procedure execution | Major | proc-v2 |
| [HBASE-16469](https://issues.apache.org/jira/browse/HBASE-16469) | Several log refactoring/improvement suggestions | Major | Operability |
| [HBASE-17836](https://issues.apache.org/jira/browse/HBASE-17836) | CellUtil#estimatedSerializedSizeOf is slow when input is ByteBufferCell | Minor | . |
| [HBASE-16969](https://issues.apache.org/jira/browse/HBASE-16969) | RegionCoprocessorServiceExec should override the toString() for debugging | Minor | . |
| [HBASE-17854](https://issues.apache.org/jira/browse/HBASE-17854) | Use StealJobQueue in HFileCleaner after HBASE-17215 | Major | . |
| [HBASE-17215](https://issues.apache.org/jira/browse/HBASE-17215) | Separate small/large file delete threads in HFileCleaner to accelerate archived hfile cleanup speed | Major | . |
| [HBASE-17831](https://issues.apache.org/jira/browse/HBASE-17831) | Support small scan in thrift2 | Major | Thrift |
| [HBASE-17623](https://issues.apache.org/jira/browse/HBASE-17623) | Reuse the bytes array when building the hfile block | Major | HFile |
| [HBASE-17815](https://issues.apache.org/jira/browse/HBASE-17815) | Remove the unused field in PrefixTreeSeeker | Trivial | . |
| [HBASE-17778](https://issues.apache.org/jira/browse/HBASE-17778) | Remove the testing code in the AsyncRequestFutureImpl | Trivial | . |
| [HBASE-15339](https://issues.apache.org/jira/browse/HBASE-15339) | Improve DateTieredCompactionPolicy | Major | Compaction |
| [HBASE-17747](https://issues.apache.org/jira/browse/HBASE-17747) | Support both weak and soft object pool | Major | . |
| [HBASE-15429](https://issues.apache.org/jira/browse/HBASE-15429) | Add a split policy for busy regions | Major | regionserver |
| [HBASE-17731](https://issues.apache.org/jira/browse/HBASE-17731) | Fractional latency reporting in MultiThreadedAction | Trivial | . |
| [HBASE-16977](https://issues.apache.org/jira/browse/HBASE-16977) | VerifyReplication should log a printable representation of the row keys | Minor | Replication |
| [HBASE-15941](https://issues.apache.org/jira/browse/HBASE-15941) | HBCK repair should not unsplit healthy splitted region | Major | hbck |
| [HBASE-17532](https://issues.apache.org/jira/browse/HBASE-17532) | Replace explicit type with diamond operator | Trivial | build |
| [HBASE-17734](https://issues.apache.org/jira/browse/HBASE-17734) | Guard against possibly copying the qualifier in the ScanDeleteTracker | Minor | . |
| [HBASE-17690](https://issues.apache.org/jira/browse/HBASE-17690) | Clean up MOB code | Major | mob |
| [HBASE-16188](https://issues.apache.org/jira/browse/HBASE-16188) | Add EventCounter information to log4j properties file | Minor | . |
| [HBASE-17689](https://issues.apache.org/jira/browse/HBASE-17689) | Add support for table.existsAll in thrift2 THBaseservice | Major | Thrift |
| [HBASE-17634](https://issues.apache.org/jira/browse/HBASE-17634) | Clean up the usage of Result.isPartial | Major | scan |
| [HBASE-17654](https://issues.apache.org/jira/browse/HBASE-17654) | RSGroup code refactoring | Major | rsgroup |
| [HBASE-17057](https://issues.apache.org/jira/browse/HBASE-17057) | Minor compactions should also drop page cache behind reads | Major | Compaction |
| [HBASE-17676](https://issues.apache.org/jira/browse/HBASE-17676) | Get class name once for all in AbstractFSWAL | Major | Performance |
| [HBASE-13718](https://issues.apache.org/jira/browse/HBASE-13718) | Add a pretty printed table description to the table detail page of HBase's master | Minor | hbase |
| [HBASE-17172](https://issues.apache.org/jira/browse/HBASE-17172) | Optimize mob compaction with \_del files | Major | mob |
| [HBASE-17627](https://issues.apache.org/jira/browse/HBASE-17627) | Active workers metric for thrift | Major | Thrift |
| [HBASE-17637](https://issues.apache.org/jira/browse/HBASE-17637) | Update progress more frequently in IntegrationTestBigLinkedList.Generator.persist | Minor | . |
| [HBASE-17605](https://issues.apache.org/jira/browse/HBASE-17605) | Refactor procedure framework code | Major | proc-v2 |
| [HBASE-17280](https://issues.apache.org/jira/browse/HBASE-17280) | Add mechanism to control hbase cleaner behavior | Minor | Client, hbase, shell |
| [HBASE-17613](https://issues.apache.org/jira/browse/HBASE-17613) | avoid copy of family when initializing the FSWALEntry | Minor | . |
| [HBASE-17437](https://issues.apache.org/jira/browse/HBASE-17437) | Support specifying a WAL directory outside of the root directory | Major | Filesystem Integration, wal |
| [HBASE-17592](https://issues.apache.org/jira/browse/HBASE-17592) | Fix typo in IPCUtil and RpcConnection | Trivial | . |
| [HBASE-17588](https://issues.apache.org/jira/browse/HBASE-17588) | Remove unused imports brought in by HBASE-17437 | Trivial | . |
| [HBASE-17552](https://issues.apache.org/jira/browse/HBASE-17552) | Update developer section in hbase book | Major | . |
| [HBASE-17543](https://issues.apache.org/jira/browse/HBASE-17543) | Create additional ReplicationEndpoint WALEntryFilters by configuration | Major | Replication |
| [HBASE-17569](https://issues.apache.org/jira/browse/HBASE-17569) | HBase-Procedure module need to support mvn clean test -PskipProcedureTests to skip unit test | Minor | proc-v2 |
| [HBASE-17555](https://issues.apache.org/jira/browse/HBASE-17555) | Change calls to deprecated getHBaseAdmin to getAdmin | Minor | . |
| [HBASE-17563](https://issues.apache.org/jira/browse/HBASE-17563) | Foreach and switch in RootDocProcessor and StabilityOptions | Trivial | . |
| [HBASE-17515](https://issues.apache.org/jira/browse/HBASE-17515) | Reduce memory footprint of RegionLoads kept by StochasticLoadBalancer | Major | . |
| [HBASE-17462](https://issues.apache.org/jira/browse/HBASE-17462) | Use sliding window for read/write request costs in StochasticLoadBalancer | Major | . |
| [HBASE-16698](https://issues.apache.org/jira/browse/HBASE-16698) | Performance issue: handlers stuck waiting for CountDownLatch inside WALKey#getWriteEntry under high writing workload | Major | Performance |
| [HBASE-17404](https://issues.apache.org/jira/browse/HBASE-17404) | Replace explicit type with diamond operator in hbase-annotations | Trivial | . |
| [HBASE-10699](https://issues.apache.org/jira/browse/HBASE-10699) | Optimize some code; set capacity on arraylist when possible; use isEmpty; reduce allocations | Major | . |
| [HBASE-17488](https://issues.apache.org/jira/browse/HBASE-17488) | WALEdit should be lazily instantiated | Trivial | . |
| [HBASE-17408](https://issues.apache.org/jira/browse/HBASE-17408) | Introduce per request limit by number of mutations | Major | . |
| [HBASE-17291](https://issues.apache.org/jira/browse/HBASE-17291) | Remove ImmutableSegment#getKeyValueScanner | Major | Scanners |
| [HBASE-17314](https://issues.apache.org/jira/browse/HBASE-17314) | Limit total buffered size for all replication sources | Major | Replication |
| [HBASE-17348](https://issues.apache.org/jira/browse/HBASE-17348) | Remove the unused hbase.replication from javadoc/comment/book completely | Trivial | . |
| [HBASE-15924](https://issues.apache.org/jira/browse/HBASE-15924) | Enhance hbase services autorestart capability to hbase-daemon.sh | Major | . |
| [HBASE-17292](https://issues.apache.org/jira/browse/HBASE-17292) | Add observer notification before bulk loaded hfile is moved to region directory | Major | . |
| [HBASE-17332](https://issues.apache.org/jira/browse/HBASE-17332) | Replace HashMap to Array for DataBlockEncoding.idToEncoding | Major | . |
| [HBASE-17331](https://issues.apache.org/jira/browse/HBASE-17331) | Avoid busy waiting in ThrottledInputStream | Minor | . |
| [HBASE-17318](https://issues.apache.org/jira/browse/HBASE-17318) | Increment does not add new column if the increment amount is zero at first time writing | Major | . |
| [HBASE-17298](https://issues.apache.org/jira/browse/HBASE-17298) | remove unused code in HRegion#doMiniBatchMutation | Minor | regionserver |
| [HBASE-17296](https://issues.apache.org/jira/browse/HBASE-17296) | Provide per peer throttling for replication | Major | Replication |
| [HBASE-17276](https://issues.apache.org/jira/browse/HBASE-17276) | Reduce log spam from WrongRegionException in large multi()'s | Minor | regionserver |
| [HBASE-17241](https://issues.apache.org/jira/browse/HBASE-17241) | Avoid compacting already compacted mob files with \_del files | Major | mob |
| [HBASE-17207](https://issues.apache.org/jira/browse/HBASE-17207) | Arrays.asList() with too few arguments | Trivial | . |
| [HBASE-16700](https://issues.apache.org/jira/browse/HBASE-16700) | Allow for coprocessor whitelisting | Minor | Coprocessors |
| [HBASE-17239](https://issues.apache.org/jira/browse/HBASE-17239) | Add UnsafeByteOperations#wrap(ByteInput, int offset, int len) API | Major | Protobufs |
| [HBASE-17245](https://issues.apache.org/jira/browse/HBASE-17245) | Replace HTableDescriptor#htd.getColumnFamilies().length with a low-cost implementation | Minor | . |
| [HBASE-14882](https://issues.apache.org/jira/browse/HBASE-14882) | Provide a Put API that adds the provided family, qualifier, value without copying | Major | . |
| [HBASE-17243](https://issues.apache.org/jira/browse/HBASE-17243) | Reuse CompactionPartitionId and avoid creating MobFileName in PartitionedMobCompactor to avoid unnecessary new objects | Minor | mob |
| [HBASE-17194](https://issues.apache.org/jira/browse/HBASE-17194) | Assign the new region to the idle server after splitting | Minor | . |
| [HBASE-17232](https://issues.apache.org/jira/browse/HBASE-17232) | Replace HashSet with ArrayList to accumulate delayed scanners in KVHeap and StoreScanner. | Major | . |
| [HBASE-17161](https://issues.apache.org/jira/browse/HBASE-17161) | MOB : Make ref cell creation more efficient | Major | . |
| [HBASE-17235](https://issues.apache.org/jira/browse/HBASE-17235) | Improvement in creation of CIS for onheap buffer cases | Major | rpc |
| [HBASE-17191](https://issues.apache.org/jira/browse/HBASE-17191) | Make use of UnsafeByteOperations#unsafeWrap(ByteBuffer buffer) in PBUtil#toCell(Cell cell) | Major | . |
| [HBASE-17205](https://issues.apache.org/jira/browse/HBASE-17205) | Add a metric for the duration of region in transition | Minor | Region Assignment |
| [HBASE-17216](https://issues.apache.org/jira/browse/HBASE-17216) | A Few Fields Can Be Safely Made Static | Major | . |
| [HBASE-17212](https://issues.apache.org/jira/browse/HBASE-17212) | Should add null checker on table name in HTable constructor and RegionServerCallable | Major | . |
| [HBASE-17184](https://issues.apache.org/jira/browse/HBASE-17184) | Code cleanup of LruBlockCache | Trivial | . |
| [HBASE-17211](https://issues.apache.org/jira/browse/HBASE-17211) | Add more details in log when UnknownScannerException thrown in ScannerCallable | Minor | Operability |
| [HBASE-17178](https://issues.apache.org/jira/browse/HBASE-17178) | Add region balance throttling | Major | Balancer |
| [HBASE-16302](https://issues.apache.org/jira/browse/HBASE-16302) | age of last shipped op and age of last applied op should be histograms | Major | Replication |
| [HBASE-16561](https://issues.apache.org/jira/browse/HBASE-16561) | Add metrics about read/write/scan queue length and active read/write/scan handler count | Minor | IPC/RPC, metrics |
| [HBASE-17086](https://issues.apache.org/jira/browse/HBASE-17086) | Add comments to explain why Cell#getTagsLength() returns an int, rather than a short | Minor | Interface |
| [HBASE-17176](https://issues.apache.org/jira/browse/HBASE-17176) | Reuse the builder in RequestConverter | Minor | . |
| [HBASE-17157](https://issues.apache.org/jira/browse/HBASE-17157) | Increase the default mergeable threshold for mob compaction | Major | mob |
| [HBASE-17129](https://issues.apache.org/jira/browse/HBASE-17129) | Remove public from methods in DataType interface | Minor | . |
| [HBASE-17123](https://issues.apache.org/jira/browse/HBASE-17123) | Add postBulkLoadHFile variant that notifies the final paths for the hfiles | Major | . |
| [HBASE-17126](https://issues.apache.org/jira/browse/HBASE-17126) | Expose KeyValue#checkParameters() and checkForTagsLength() to be used by other Cell implementations | Minor | Client, regionserver |
| [HBASE-17088](https://issues.apache.org/jira/browse/HBASE-17088) | Refactor RWQueueRpcExecutor/BalancedQueueRpcExecutor/RpcExecutor | Major | rpc |
| [HBASE-16708](https://issues.apache.org/jira/browse/HBASE-16708) | Expose endpoint Coprocessor name in "responseTooSlow" log messages | Major | . |
| [HBASE-17037](https://issues.apache.org/jira/browse/HBASE-17037) | Enhance LoadIncrementalHFiles API to convey loaded files | Major | . |
| [HBASE-17077](https://issues.apache.org/jira/browse/HBASE-17077) | Don't copy the replication queue belonging to the peer which has been deleted | Minor | . |
| [HBASE-17047](https://issues.apache.org/jira/browse/HBASE-17047) | Add an API to get HBase connection cache statistics | Minor | spark |
| [HBASE-17063](https://issues.apache.org/jira/browse/HBASE-17063) | Cleanup TestHRegion : remove duplicate variables for method name and two unused params in initRegion | Minor | . |
| [HBASE-17026](https://issues.apache.org/jira/browse/HBASE-17026) | VerifyReplication log should distinguish whether good row key is result of revalidation | Minor | . |
| [HBASE-16840](https://issues.apache.org/jira/browse/HBASE-16840) | Reuse cell's timestamp and type in ScanQueryMatcher | Minor | . |
| [HBASE-17005](https://issues.apache.org/jira/browse/HBASE-17005) | Improve log message in MobFileCache | Trivial | mob |
| [HBASE-17004](https://issues.apache.org/jira/browse/HBASE-17004) | Refactor IntegrationTestManyRegions to use @ClassRule for timing out | Minor | integration tests |
| [HBASE-16946](https://issues.apache.org/jira/browse/HBASE-16946) | Provide Raw scan as an option in VerifyReplication | Minor | hbase |
| [HBASE-17013](https://issues.apache.org/jira/browse/HBASE-17013) | Add constructor to RowMutations for initializing the capacity of internal list | Minor | . |
| [HBASE-17006](https://issues.apache.org/jira/browse/HBASE-17006) | Add names to threads for better debugability of thread dumps | Minor | Operability |
| [HBASE-17014](https://issues.apache.org/jira/browse/HBASE-17014) | Add clearly marked starting and shutdown log messages for all services. | Minor | Operability |
| [HBASE-16950](https://issues.apache.org/jira/browse/HBASE-16950) | Print raw stats in the end of procedure performance tools for parsing results from scripts | Trivial | . |
| [HBASE-16783](https://issues.apache.org/jira/browse/HBASE-16783) | Use ByteBufferPool for the header and message during Rpc response | Minor | . |
| [HBASE-16562](https://issues.apache.org/jira/browse/HBASE-16562) | ITBLL should fail to start if misconfigured | Major | integration tests |
| [HBASE-16414](https://issues.apache.org/jira/browse/HBASE-16414) | Improve performance for RPC encryption with Apache Common Crypto | Major | IPC/RPC |
| [HBASE-16854](https://issues.apache.org/jira/browse/HBASE-16854) | Refactor the org.apache.hadoop.hbase.client.Action | Minor | . |
| [HBASE-16774](https://issues.apache.org/jira/browse/HBASE-16774) | [shell] Add coverage to TestShell when ZooKeeper is not reachable | Major | shell, test |
| [HBASE-16844](https://issues.apache.org/jira/browse/HBASE-16844) | Procedure V2: DispatchMergingRegionsProcedure to use base class StateMachineProcedure for abort and rollback | Trivial | master, proc-v2 |
| [HBASE-16818](https://issues.apache.org/jira/browse/HBASE-16818) | Avoid multiple copies of binary data during the conversion from Result to Row | Major | spark |
| [HBASE-16821](https://issues.apache.org/jira/browse/HBASE-16821) | Enhance LoadIncrementalHFiles API to convey missing hfiles if any | Major | . |
| [HBASE-15921](https://issues.apache.org/jira/browse/HBASE-15921) | Add first AsyncTable impl and create TableImpl based on it | Major | Client |
| [HBASE-16792](https://issues.apache.org/jira/browse/HBASE-16792) | Reuse KeyValue.KeyOnlyKeyValue in BufferedDataBlockEncoder.SeekerState | Minor | . |
| [HBASE-16784](https://issues.apache.org/jira/browse/HBASE-16784) | Make use of ExtendedCell#write(OutputStream os) for the default HFileWriter#append() | Major | . |
| [HBASE-16809](https://issues.apache.org/jira/browse/HBASE-16809) | Save one cell length calculation in HeapMemStoreLAB#copyCellInto | Minor | . |
| [HBASE-16661](https://issues.apache.org/jira/browse/HBASE-16661) | Add last major compaction age to per-region metrics | Minor | . |
| [HBASE-16773](https://issues.apache.org/jira/browse/HBASE-16773) | AccessController should access local region if possible | Major | . |
| [HBASE-16657](https://issues.apache.org/jira/browse/HBASE-16657) | Expose per-region last major compaction timestamp in RegionServer UI | Minor | regionserver, UI |
| [HBASE-16772](https://issues.apache.org/jira/browse/HBASE-16772) | Add verbose option to VerifyReplication for logging good rows | Minor | Replication, Usability |
| [HBASE-16690](https://issues.apache.org/jira/browse/HBASE-16690) | Move znode path configs to a separated class | Major | Zookeeper |
| [HBASE-16672](https://issues.apache.org/jira/browse/HBASE-16672) | Add option for bulk load to always copy hfile(s) instead of renaming | Major | . |
| [HBASE-16720](https://issues.apache.org/jira/browse/HBASE-16720) | Sort build ids in flaky dashboard | Minor | . |
| [HBASE-16691](https://issues.apache.org/jira/browse/HBASE-16691) | Optimize KeyOnlyFilter by utilizing KeyOnlyCell | Major | . |
| [HBASE-16714](https://issues.apache.org/jira/browse/HBASE-16714) | Procedure V2 - use base class to remove duplicate set up test code in table DDL procedures | Major | proc-v2, test |
| [HBASE-16694](https://issues.apache.org/jira/browse/HBASE-16694) | Reduce garbage for onDiskChecksum in HFileBlock | Minor | . |
| [HBASE-16705](https://issues.apache.org/jira/browse/HBASE-16705) | Eliminate long to Long auto boxing in LongComparator | Minor | Filters |
| [HBASE-16692](https://issues.apache.org/jira/browse/HBASE-16692) | Make ByteBufferUtils#equals safer and correct | Major | . |
| [HBASE-16667](https://issues.apache.org/jira/browse/HBASE-16667) | Building with JDK 8: ignoring option MaxPermSize=256m | Minor | build |
| [HBASE-16423](https://issues.apache.org/jira/browse/HBASE-16423) | Add re-compare option to VerifyReplication to avoid occasional inconsistent rows | Minor | Replication |
| [HBASE-16680](https://issues.apache.org/jira/browse/HBASE-16680) | Reduce garbage in BufferChain | Minor | . |
| [HBASE-16659](https://issues.apache.org/jira/browse/HBASE-16659) | Use CellUtil.createFirstOnRow instead of KeyValueUtil.createFirstOnRow in some places. | Minor | . |
| [HBASE-16646](https://issues.apache.org/jira/browse/HBASE-16646) | Enhance LoadIncrementalHFiles API to accept store file paths as input | Major | . |
| [HBASE-16658](https://issues.apache.org/jira/browse/HBASE-16658) | Optimize UTF8 string/byte conversions | Minor | . |
| [HBASE-16640](https://issues.apache.org/jira/browse/HBASE-16640) | TimeoutBlockingQueue#remove() should return whether the entry is removed | Minor | . |
| [HBASE-15949](https://issues.apache.org/jira/browse/HBASE-15949) | Cleanup TestRegionServerMetrics | Minor | . |
| [HBASE-16381](https://issues.apache.org/jira/browse/HBASE-16381) | Shell deleteall command should support row key prefixes | Minor | shell |
| [HBASE-16616](https://issues.apache.org/jira/browse/HBASE-16616) | Rpc handlers stuck on ThreadLocalMap.expungeStaleEntry | Major | Performance |
| [HBASE-16086](https://issues.apache.org/jira/browse/HBASE-16086) | TableCfWALEntryFilter and ScopeWALEntryFilter should not redundantly iterate over cells. | Major | . |
| [HBASE-16541](https://issues.apache.org/jira/browse/HBASE-16541) | Avoid unnecessary cell copy in Result#compareResults | Major | . |
| [HBASE-16399](https://issues.apache.org/jira/browse/HBASE-16399) | Provide an API to get list of failed regions and servername in Canary | Major | canary |
| [HBASE-16502](https://issues.apache.org/jira/browse/HBASE-16502) | Reduce garbage in BufferedDataBlockEncoder | Major | . |
| [HBASE-16509](https://issues.apache.org/jira/browse/HBASE-16509) | Add option to LoadIncrementalHFiles which allows skipping unmatched column families | Major | . |
| [HBASE-16224](https://issues.apache.org/jira/browse/HBASE-16224) | Reduce the number of RPCs for the large PUTs | Minor | Client |
| [HBASE-16508](https://issues.apache.org/jira/browse/HBASE-16508) | Move UnexpectedStateException to common | Trivial | . |
| [HBASE-16486](https://issues.apache.org/jira/browse/HBASE-16486) | Unify system table creation using the same createSystemTable API. | Minor | proc-v2 |
| [HBASE-16448](https://issues.apache.org/jira/browse/HBASE-16448) | Custom metrics for custom replication endpoints | Major | Replication |
| [HBASE-16450](https://issues.apache.org/jira/browse/HBASE-16450) | Shell tool to dump replication queues | Major | Operability, Replication |
| [HBASE-16455](https://issues.apache.org/jira/browse/HBASE-16455) | Provide API for obtaining all the WAL files | Major | . |
| [HBASE-16422](https://issues.apache.org/jira/browse/HBASE-16422) | Tighten our guarantees on compatibility across patch versions | Major | documentation |
| [HBASE-16434](https://issues.apache.org/jira/browse/HBASE-16434) | Improve flaky dashboard | Minor | . |
| [HBASE-16419](https://issues.apache.org/jira/browse/HBASE-16419) | check REPLICATION\_SCOPE's value more stringently | Major | . |
| [HBASE-16385](https://issues.apache.org/jira/browse/HBASE-16385) | Have hbase-rest pull hbase.rest.port from Constants.java | Minor | REST |
| [HBASE-16379](https://issues.apache.org/jira/browse/HBASE-16379) | [replication] Minor improvement to replication/copy\_tables\_desc.rb | Trivial | Replication, shell |
| [HBASE-14345](https://issues.apache.org/jira/browse/HBASE-14345) | Consolidate printUsage in IntegrationTestLoadAndVerify | Trivial | integration tests |
| [HBASE-16299](https://issues.apache.org/jira/browse/HBASE-16299) | Update REST API scanner with ability to do reverse scan | Minor | REST |
| [HBASE-12770](https://issues.apache.org/jira/browse/HBASE-12770) | Don't transfer all the queued hlogs of a dead server to the same alive server | Minor | Replication |
| [HBASE-15882](https://issues.apache.org/jira/browse/HBASE-15882) | Upgrade to yetus precommit 0.3.0 | Critical | build |
| [HBASE-8386](https://issues.apache.org/jira/browse/HBASE-8386) | deprecate TableMapReduce.addDependencyJars(Configuration, class\<?\> ...) | Major | mapreduce |
| [HBASE-16287](https://issues.apache.org/jira/browse/HBASE-16287) | LruBlockCache size should not exceed acceptableSize too many | Major | BlockCache |
| [HBASE-16225](https://issues.apache.org/jira/browse/HBASE-16225) | Refactor ScanQueryMatcher | Major | regionserver, Scanners |
| [HBASE-14881](https://issues.apache.org/jira/browse/HBASE-14881) | Provide a Put API that uses the provided row without coping | Major | . |
| [HBASE-16256](https://issues.apache.org/jira/browse/HBASE-16256) | Purpose of EnvironmentEdge, EnvironmentEdgeManager | Trivial | documentation, regionserver |
| [HBASE-16275](https://issues.apache.org/jira/browse/HBASE-16275) | Change ServerManager#onlineServers from ConcurrentHashMap to ConcurrentSkipListMap | Minor | . |
| [HBASE-14743](https://issues.apache.org/jira/browse/HBASE-14743) | Add metrics around HeapMemoryManager | Minor | . |
| [HBASE-16266](https://issues.apache.org/jira/browse/HBASE-16266) | Do not throw ScannerTimeoutException when catch UnknownScannerException | Major | Client, Scanners |
| [HBASE-16008](https://issues.apache.org/jira/browse/HBASE-16008) | A robust way deal with early termination of HBCK | Major | hbck |
| [HBASE-13701](https://issues.apache.org/jira/browse/HBASE-13701) | Consolidate SecureBulkLoadEndpoint into HBase core as default for bulk load | Major | . |
| [HBASE-16052](https://issues.apache.org/jira/browse/HBASE-16052) | Improve HBaseFsck Scalability | Major | hbck |
| [HBASE-16241](https://issues.apache.org/jira/browse/HBASE-16241) | Allow specification of annotations to use when running check\_compatibility.sh | Major | scripts |
| [HBASE-16231](https://issues.apache.org/jira/browse/HBASE-16231) | Integration tests should support client keytab login for secure clusters | Major | integration tests |
| [HBASE-16220](https://issues.apache.org/jira/browse/HBASE-16220) | Demote log level for "HRegionFileSystem - No StoreFiles for" messages to TRACE | Minor | . |
| [HBASE-16087](https://issues.apache.org/jira/browse/HBASE-16087) | Replication shouldn't start on a master if if only hosts system tables | Major | . |
| [HBASE-14548](https://issues.apache.org/jira/browse/HBASE-14548) | Expand how table coprocessor jar and dependency path can be specified | Major | Coprocessors |
| [HBASE-16108](https://issues.apache.org/jira/browse/HBASE-16108) | RowCounter should support multiple key ranges | Major | . |
| [HBASE-16140](https://issues.apache.org/jira/browse/HBASE-16140) | bump owasp.esapi from 2.1.0 to 2.1.0.1 | Major | dependencies |
| [HBASE-16114](https://issues.apache.org/jira/browse/HBASE-16114) | Get regionLocation of required regions only for MR jobs | Minor | mapreduce |
| [HBASE-16147](https://issues.apache.org/jira/browse/HBASE-16147) | Shell command for getting compaction state | Major | shell |
| [HBASE-16124](https://issues.apache.org/jira/browse/HBASE-16124) | Make check\_compatibility.sh less verbose when building HBase | Minor | build, test |
| [HBASE-16149](https://issues.apache.org/jira/browse/HBASE-16149) | Log the underlying RPC exception in RpcRetryingCallerImpl | Minor | . |
| [HBASE-16130](https://issues.apache.org/jira/browse/HBASE-16130) | Add comments to ProcedureStoreTracker | Minor | . |
| [HBASE-16139](https://issues.apache.org/jira/browse/HBASE-16139) | Use CellUtil instead of KeyValueUtil in Import | Minor | . |
| [HBASE-14007](https://issues.apache.org/jira/browse/HBASE-14007) | Writing to table through MR should fail upfront if table does not exist/is disabled | Minor | mapreduce |
| [HBASE-16089](https://issues.apache.org/jira/browse/HBASE-16089) | Add on FastPath for CoDel | Major | . |
| [HBASE-15353](https://issues.apache.org/jira/browse/HBASE-15353) | Add metric for number of CallQueueTooBigExceptions | Minor | IPC/RPC, metrics |
| [HBASE-16085](https://issues.apache.org/jira/browse/HBASE-16085) | Add on metric for failed compactions | Major | . |
| [HBASE-15870](https://issues.apache.org/jira/browse/HBASE-15870) | Specify columns in REST multi gets | Minor | REST |
| [HBASE-14397](https://issues.apache.org/jira/browse/HBASE-14397) | PrefixFilter doesn't filter all remaining rows if the prefix is longer than rowkey being compared | Minor | Filters |
| [HBASE-16042](https://issues.apache.org/jira/browse/HBASE-16042) | Add support in PE tool for InMemory Compaction | Major | . |
| [HBASE-15600](https://issues.apache.org/jira/browse/HBASE-15600) | Add provision for adding mutations to memstore or able to write to same region in batchMutate coprocessor hooks | Major | . |
| [HBASE-16018](https://issues.apache.org/jira/browse/HBASE-16018) | Better documentation of ReplicationPeers | Minor | . |
| [HBASE-16048](https://issues.apache.org/jira/browse/HBASE-16048) | Tag InternalScanner with LimitedPrivate(HBaseInterfaceAudience.COPROC) | Major | . |
| [HBASE-5291](https://issues.apache.org/jira/browse/HBASE-5291) | Add Kerberos HTTP SPNEGO authentication support to HBase web consoles | Major | master, regionserver, security |
| [HBASE-16033](https://issues.apache.org/jira/browse/HBASE-16033) | Add more details in logging of responseTooSlow/TooLarge | Major | Operability |
| [HBASE-16026](https://issues.apache.org/jira/browse/HBASE-16026) | Master UI should display status of additional ZK switches | Major | . |
| [HBASE-16004](https://issues.apache.org/jira/browse/HBASE-16004) | Update to Netty 4.1.1 | Major | . |
| [HBASE-15981](https://issues.apache.org/jira/browse/HBASE-15981) | Stripe and Date-tiered compactions inaccurately suggest disabling table in docs | Minor | documentation |
| [HBASE-15849](https://issues.apache.org/jira/browse/HBASE-15849) | Shell Cleanup: Simplify handling of commands' runtime | Minor | . |
| [HBASE-15931](https://issues.apache.org/jira/browse/HBASE-15931) | Add log for long-running tasks in AsyncProcess | Critical | Operability |
| [HBASE-15727](https://issues.apache.org/jira/browse/HBASE-15727) | Canary Tool for Zookeeper | Major | . |
| [HBASE-15910](https://issues.apache.org/jira/browse/HBASE-15910) | Update hbase ref guide to explain submit-patch.py | Major | documentation |
| [HBASE-15890](https://issues.apache.org/jira/browse/HBASE-15890) | Allow thrift to set/unset "cacheBlocks" for Scans | Major | Thrift |
| [HBASE-15854](https://issues.apache.org/jira/browse/HBASE-15854) | Log the cause of SASL connection failures | Minor | security |
| [HBASE-15837](https://issues.apache.org/jira/browse/HBASE-15837) | Memstore size accounting is wrong if postBatchMutate() throws exception | Major | regionserver |
| [HBASE-15471](https://issues.apache.org/jira/browse/HBASE-15471) | Add num calls in priority and general queue to RS UI | Major | UI |
| [HBASE-15802](https://issues.apache.org/jira/browse/HBASE-15802) | ConnectionUtils should use ThreadLocalRandom instead of Random | Minor | . |
| [HBASE-15529](https://issues.apache.org/jira/browse/HBASE-15529) | Override needBalance in StochasticLoadBalancer | Minor | . |
| [HBASE-15864](https://issues.apache.org/jira/browse/HBASE-15864) | Reuse the testing helper to wait regions in transition | Trivial | test |
| [HBASE-15843](https://issues.apache.org/jira/browse/HBASE-15843) | Replace RegionState.getRegionInTransition() Map with a Set | Trivial | master, Region Assignment |
| [HBASE-15593](https://issues.apache.org/jira/browse/HBASE-15593) | Time limit of scanning should be offered by client | Major | . |
| [HBASE-15667](https://issues.apache.org/jira/browse/HBASE-15667) | Add more clarity to Reference Guide related to importing Eclipse Formatter | Trivial | documentation |
| [HBASE-15842](https://issues.apache.org/jira/browse/HBASE-15842) | SnapshotInfo should display ownership information | Major | . |
| [HBASE-13532](https://issues.apache.org/jira/browse/HBASE-13532) | Make UnknownScannerException logging less scary | Trivial | . |
| [HBASE-15808](https://issues.apache.org/jira/browse/HBASE-15808) | Reduce potential bulk load intermediate space usage and waste | Minor | . |
| [HBASE-15415](https://issues.apache.org/jira/browse/HBASE-15415) | Improve Master WebUI snapshot information | Minor | master, snapshots |
| [HBASE-15609](https://issues.apache.org/jira/browse/HBASE-15609) | Remove PB references from Result, DoubleColumnInterpreter and any such public facing class for 2.0 | Blocker | . |
| [HBASE-15791](https://issues.apache.org/jira/browse/HBASE-15791) | Improve javadoc in ScheduledChore | Minor | master |
| [HBASE-15793](https://issues.apache.org/jira/browse/HBASE-15793) | Port over AsyncCall improvements | Major | rpc |
| [HBASE-15794](https://issues.apache.org/jira/browse/HBASE-15794) | Fix Findbugs instanceof always true issue in MultiServerCallable | Minor | . |
| [HBASE-15795](https://issues.apache.org/jira/browse/HBASE-15795) | Cleanup all classes in package org.apache.hadoop.hbase.ipc for code style | Minor | . |
| [HBASE-15745](https://issues.apache.org/jira/browse/HBASE-15745) | Refactor RPC classes to better accept async changes. | Major | . |
| [HBASE-15773](https://issues.apache.org/jira/browse/HBASE-15773) | CellCounter improvements | Major | mapreduce |
| [HBASE-15759](https://issues.apache.org/jira/browse/HBASE-15759) | RegionObserver.preStoreScannerOpen() doesn't have acces to current readpoint | Minor | Coprocessors |
| [HBASE-15608](https://issues.apache.org/jira/browse/HBASE-15608) | Remove PB references from SnapShot related Exceptions | Blocker | . |
| [HBASE-15767](https://issues.apache.org/jira/browse/HBASE-15767) | Upgrade httpclient dependency | Major | build, dependencies |
| [HBASE-15768](https://issues.apache.org/jira/browse/HBASE-15768) | fix capitalization of ZooKeeper usage | Trivial | documentation |
| [HBASE-15720](https://issues.apache.org/jira/browse/HBASE-15720) | Print row locks at the debug dump page | Major | . |
| [HBASE-15744](https://issues.apache.org/jira/browse/HBASE-15744) | Port over small format/text improvements from HBASE-13784 | Trivial | . |
| [HBASE-15551](https://issues.apache.org/jira/browse/HBASE-15551) | Make call queue too big exception use servername | Minor | . |
| [HBASE-15706](https://issues.apache.org/jira/browse/HBASE-15706) | HFilePrettyPrinter should print out nicely formatted tags | Minor | HFile |
| [HBASE-15686](https://issues.apache.org/jira/browse/HBASE-15686) | Add override mechanism for the exempt classes when dynamically loading table coprocessor | Major | Coprocessors |
| [HBASE-15680](https://issues.apache.org/jira/browse/HBASE-15680) | Examples in shell help message for TIMERANGE scanner specifications should use milliseconds instead of seconds | Trivial | shell |
| [HBASE-15688](https://issues.apache.org/jira/browse/HBASE-15688) | Use MasterServices directly instead of casting to HMaster when possible | Trivial | master |
| [HBASE-15641](https://issues.apache.org/jira/browse/HBASE-15641) | Shell "alter" should do a single modifyTable operation | Major | shell |
| [HBASE-15614](https://issues.apache.org/jira/browse/HBASE-15614) | Report metrics from JvmPauseMonitor | Major | metrics, regionserver |
| [HBASE-13129](https://issues.apache.org/jira/browse/HBASE-13129) | Add troubleshooting hints around WAL retention from replication | Major | documentation, Replication |
| [HBASE-15632](https://issues.apache.org/jira/browse/HBASE-15632) | Undo the checking of lastStoreFlushTimeMap.isEmpty() introduced in HBASE-13145 | Minor | regionserver |
| [HBASE-14985](https://issues.apache.org/jira/browse/HBASE-14985) | TimeRange constructors should set allTime when appropriate | Minor | . |
| [HBASE-15605](https://issues.apache.org/jira/browse/HBASE-15605) | Remove PB references from HCD and HTD for 2.0 | Blocker | . |
| [HBASE-15507](https://issues.apache.org/jira/browse/HBASE-15507) | Online modification of enabled ReplicationPeerConfig | Major | Replication |
| [HBASE-15612](https://issues.apache.org/jira/browse/HBASE-15612) | Minor improvements to CellCounter and RowCounter documentation | Trivial | documentation, mapreduce |
| [HBASE-15586](https://issues.apache.org/jira/browse/HBASE-15586) | Unify human readable numbers in the web UI | Major | . |
| [HBASE-15606](https://issues.apache.org/jira/browse/HBASE-15606) | Limit creating zk connection in HBaseAdmin#getCompactionState() only to case when 'hbase:meta' is checked. | Minor | Admin |
| [HBASE-15396](https://issues.apache.org/jira/browse/HBASE-15396) | Enhance mapreduce.TableSplit to add encoded region name | Minor | mapreduce |
| [HBASE-15571](https://issues.apache.org/jira/browse/HBASE-15571) | Make MasterProcedureManagerHost accessible through MasterServices | Major | . |
| [HBASE-15569](https://issues.apache.org/jira/browse/HBASE-15569) | Make Bytes.toStringBinary faster | Minor | Performance |
| [HBASE-14983](https://issues.apache.org/jira/browse/HBASE-14983) | Create metrics for per block type hit/miss ratios | Major | metrics |
| [HBASE-15191](https://issues.apache.org/jira/browse/HBASE-15191) | CopyTable and VerifyReplication - Option to specify batch size, versions | Minor | Replication |
| [HBASE-15508](https://issues.apache.org/jira/browse/HBASE-15508) | Add command for exporting snapshot in hbase command script | Minor | hbase, scripts, snapshots |
| [HBASE-15496](https://issues.apache.org/jira/browse/HBASE-15496) | Throw RowTooBigException only for user scan/get | Minor | Scanners |
| [HBASE-15526](https://issues.apache.org/jira/browse/HBASE-15526) | Make SnapshotManager accessible through MasterServices | Major | . |
| [HBASE-15486](https://issues.apache.org/jira/browse/HBASE-15486) | Avoid multiple disable/enable balancer calls while running rolling-restart.sh --graceful | Minor | scripts |
| [HBASE-15300](https://issues.apache.org/jira/browse/HBASE-15300) | Upgrade to zookeeper 3.4.8 | Minor | . |
| [HBASE-14703](https://issues.apache.org/jira/browse/HBASE-14703) | HTable.mutateRow does not collect stats | Major | Client |
| [HBASE-15475](https://issues.apache.org/jira/browse/HBASE-15475) | Allow TimestampsFilter to provide a seek hint | Major | Client, Filters, regionserver |
| [HBASE-15212](https://issues.apache.org/jira/browse/HBASE-15212) | RPCServer should enforce max request size | Major | . |
| [HBASE-15447](https://issues.apache.org/jira/browse/HBASE-15447) | Improve javadocs description for Delete methods | Minor | API, documentation |
| [HBASE-15478](https://issues.apache.org/jira/browse/HBASE-15478) | add comments to FSHLog explaining why syncRunnerIndex won't overflow | Minor | wal |
| [HBASE-14963](https://issues.apache.org/jira/browse/HBASE-14963) | Remove use of Guava Stopwatch from HBase client code | Major | Client |
| [HBASE-15451](https://issues.apache.org/jira/browse/HBASE-15451) | Remove unnecessary wait in MVCC | Major | . |
| [HBASE-15456](https://issues.apache.org/jira/browse/HBASE-15456) | CreateTableProcedure/ModifyTableProcedure needs to fail when there is no family in table descriptor | Minor | master |
| [HBASE-12940](https://issues.apache.org/jira/browse/HBASE-12940) | Expose listPeerConfigs and getPeerConfig to the HBase shell | Major | shell |
| [HBASE-15470](https://issues.apache.org/jira/browse/HBASE-15470) | Add a setting for Priority queue length | Major | IPC/RPC, Region Assignment |
| [HBASE-15413](https://issues.apache.org/jira/browse/HBASE-15413) | Procedure-V2: print out ProcedureInfo during trace | Trivial | proc-v2 |
| [HBASE-15243](https://issues.apache.org/jira/browse/HBASE-15243) | Utilize the lowest seek value when all Filters in MUST\_PASS\_ONE FilterList return SEEK\_NEXT\_USING\_HINT | Major | . |
| [HBASE-15338](https://issues.apache.org/jira/browse/HBASE-15338) | Add a option to disable the data block cache for testing the performance of underlying file system | Minor | integration tests |
| [HBASE-15356](https://issues.apache.org/jira/browse/HBASE-15356) | Remove unused Imports | Trivial | . |
| [HBASE-14099](https://issues.apache.org/jira/browse/HBASE-14099) | StoreFile.passesKeyRangeFilter need not create Cells from the Scan's start and stop Row | Major | Performance, Scanners |
| [HBASE-15315](https://issues.apache.org/jira/browse/HBASE-15315) | Remove always set super user call as high priority | Major | . |
| [HBASE-15222](https://issues.apache.org/jira/browse/HBASE-15222) | Use less contended classes for metrics | Critical | metrics |
| [HBASE-15312](https://issues.apache.org/jira/browse/HBASE-15312) | Update the dependences of pom for mini cluster in HBase Book | Minor | documentation |
| [HBASE-15306](https://issues.apache.org/jira/browse/HBASE-15306) | Make RPC call queue length dynamically configurable | Major | IPC/RPC |
| [HBASE-11927](https://issues.apache.org/jira/browse/HBASE-11927) | Use Native Hadoop Library for HFile checksum (And flip default from CRC32 to CRC32C) | Major | Performance |
| [HBASE-15301](https://issues.apache.org/jira/browse/HBASE-15301) | Remove the never-thrown NamingException from TableInputFormatBase#reverseDNS method signature | Minor | . |
| [HBASE-15219](https://issues.apache.org/jira/browse/HBASE-15219) | Canary tool does not return non-zero exit code when one of regions is in stuck state | Critical | canary |
| [HBASE-15223](https://issues.apache.org/jira/browse/HBASE-15223) | Make convertScanToString public for Spark | Major | . |
| [HBASE-15229](https://issues.apache.org/jira/browse/HBASE-15229) | Canary Tools should not call System.Exit on error | Critical | canary |
| [HBASE-11792](https://issues.apache.org/jira/browse/HBASE-11792) | Organize PerformanceEvaluation usage output | Minor | Performance, test |
| [HBASE-15201](https://issues.apache.org/jira/browse/HBASE-15201) | Add hbase-spark to hbase assembly | Minor | . |
| [HBASE-15211](https://issues.apache.org/jira/browse/HBASE-15211) | Don't run the CatalogJanitor if there are regions in transition | Major | master |
| [HBASE-15197](https://issues.apache.org/jira/browse/HBASE-15197) | Expose filtered read requests metric to metrics framework and Web UI | Minor | . |
| [HBASE-15177](https://issues.apache.org/jira/browse/HBASE-15177) | Reduce garbage created under high load | Major | . |
| [HBASE-13376](https://issues.apache.org/jira/browse/HBASE-13376) | Improvements to Stochastic load balancer | Minor | Balancer |
| [HBASE-15129](https://issues.apache.org/jira/browse/HBASE-15129) | Set default value for hbase.fs.tmp.dir rather than fully depend on hbase-default.xml | Major | mapreduce |
| [HBASE-14969](https://issues.apache.org/jira/browse/HBASE-14969) | Add throughput controller for flush | Major | regionserver |
| [HBASE-15123](https://issues.apache.org/jira/browse/HBASE-15123) | Remove duplicate code in LocalHBaseCluster and minor formatting | Minor | . |
| [HBASE-14865](https://issues.apache.org/jira/browse/HBASE-14865) | Support passing multiple QOPs to SaslClient/Server via hbase.rpc.protection | Major | security |
| [HBASE-15119](https://issues.apache.org/jira/browse/HBASE-15119) | Include git SHA in check\_compatibility reports | Minor | build |
| [HBASE-13525](https://issues.apache.org/jira/browse/HBASE-13525) | Update test-patch to leverage Apache Yetus | Major | build |
| [HBASE-15076](https://issues.apache.org/jira/browse/HBASE-15076) | Add getScanner(Scan scan, List\<KeyValueScanner\> additionalScanners) API into Region interface | Critical | regionserver |
| [HBASE-15068](https://issues.apache.org/jira/browse/HBASE-15068) | Add metrics for region normalization plans | Major | . |
| [HBASE-14468](https://issues.apache.org/jira/browse/HBASE-14468) | Compaction improvements: FIFO compaction policy | Major | Compaction, Performance |
| [HBASE-15066](https://issues.apache.org/jira/browse/HBASE-15066) | Small improvements to Canary tool | Major | . |
| [HBASE-14524](https://issues.apache.org/jira/browse/HBASE-14524) | Short-circuit comparison of rows in CellComparator | Major | Performance, Scanners |
| [HBASE-15038](https://issues.apache.org/jira/browse/HBASE-15038) | ExportSnapshot should support separate configurations for source and destination clusters | Major | mapreduce, snapshots |
| [HBASE-15060](https://issues.apache.org/jira/browse/HBASE-15060) | Cull TestHFileWriterV2 and HFileWriterFactory | Major | HFile |
| [HBASE-15044](https://issues.apache.org/jira/browse/HBASE-15044) | Region normalization should be allowed when underlying namespace has quota | Major | Balancer |
| [HBASE-14796](https://issues.apache.org/jira/browse/HBASE-14796) | Enhance the Gets in the connector | Minor | . |
| [HBASE-13322](https://issues.apache.org/jira/browse/HBASE-13322) | Replace explicit HBaseAdmin creation with connection#getAdmin() | Minor | . |
| [HBASE-14800](https://issues.apache.org/jira/browse/HBASE-14800) | Expose checkAndMutate via Thrift2 | Major | Thrift |
| [HBASE-14684](https://issues.apache.org/jira/browse/HBASE-14684) | Try to remove all MiniMapReduceCluster in unit tests | Critical | test |
| [HBASE-13158](https://issues.apache.org/jira/browse/HBASE-13158) | When client supports CellBlock, return the result Cells as controller payload for get(Get) API also | Major | . |
| [HBASE-14976](https://issues.apache.org/jira/browse/HBASE-14976) | Add RPC call queues to the web ui | Minor | UI |
| [HBASE-15005](https://issues.apache.org/jira/browse/HBASE-15005) | Use value array in computing block length for 1.2 and 1.3 | Major | regionserver |
| [HBASE-14978](https://issues.apache.org/jira/browse/HBASE-14978) | Don't allow Multi to retain too many blocks | Blocker | io, IPC/RPC, regionserver |
| [HBASE-14780](https://issues.apache.org/jira/browse/HBASE-14780) | Integration Tests that run with ChaosMonkey need to specify CFs | Major | integration tests |
| [HBASE-14951](https://issues.apache.org/jira/browse/HBASE-14951) | Make hbase.regionserver.maxlogs obsolete | Minor | Performance, wal |
| [HBASE-14984](https://issues.apache.org/jira/browse/HBASE-14984) | Allow memcached block cache to set optimze to false | Major | BlockCache |
| [HBASE-13425](https://issues.apache.org/jira/browse/HBASE-13425) | Documentation nit in REST Gateway impersonation section | Minor | documentation |
| [HBASE-14795](https://issues.apache.org/jira/browse/HBASE-14795) | Enhance the spark-hbase scan operations | Minor | . |
| [HBASE-14946](https://issues.apache.org/jira/browse/HBASE-14946) | Don't allow multi's to over run the max result size. | Critical | Client, IPC/RPC |
| [HBASE-14906](https://issues.apache.org/jira/browse/HBASE-14906) | Improvements on FlushLargeStoresPolicy | Major | . |
| [HBASE-14866](https://issues.apache.org/jira/browse/HBASE-14866) | VerifyReplication should use peer configuration in peer connection | Major | Replication |
| [HBASE-7171](https://issues.apache.org/jira/browse/HBASE-7171) | Initial web UI for region/memstore/storefiles details | Major | UI |
| [HBASE-14719](https://issues.apache.org/jira/browse/HBASE-14719) | Add metric for number of MasterProcWALs | Major | . |
| [HBASE-14580](https://issues.apache.org/jira/browse/HBASE-14580) | Make the HBaseMiniCluster compliant with Kerberos | Major | security, test |
| [HBASE-14749](https://issues.apache.org/jira/browse/HBASE-14749) | Make changes to region\_mover.rb to use RegionMover Java tool | Major | . |
| [HBASE-14891](https://issues.apache.org/jira/browse/HBASE-14891) | Add log for uncaught exception in RegionServerMetricsWrapperRunnable | Minor | metrics |
| [HBASE-14859](https://issues.apache.org/jira/browse/HBASE-14859) | Better checkstyle reporting | Minor | . |
| [HBASE-14826](https://issues.apache.org/jira/browse/HBASE-14826) | Small improvement in KVHeap seek() API | Minor | . |
| [HBASE-14860](https://issues.apache.org/jira/browse/HBASE-14860) | Improve BoundedByteBufferPool; make lockless | Minor | . |
| [HBASE-14871](https://issues.apache.org/jira/browse/HBASE-14871) | Allow specifying the base branch for make\_patch | Major | . |
| [HBASE-14821](https://issues.apache.org/jira/browse/HBASE-14821) | CopyTable should allow overriding more config properties for peer cluster | Major | mapreduce |
| [HBASE-13347](https://issues.apache.org/jira/browse/HBASE-13347) | Deprecate FirstKeyValueMatchingQualifiersFilter | Minor | . |
| [HBASE-14862](https://issues.apache.org/jira/browse/HBASE-14862) | Add support for reporting p90 for histogram metrics | Minor | metrics |
| [HBASE-14172](https://issues.apache.org/jira/browse/HBASE-14172) | Upgrade existing thrift binding using thrift 0.9.3 compiler. | Minor | . |
| [HBASE-14829](https://issues.apache.org/jira/browse/HBASE-14829) | Add more checkstyles | Major | . |
| [HBASE-14805](https://issues.apache.org/jira/browse/HBASE-14805) | status should show the master in shell | Major | shell |
| [HBASE-14708](https://issues.apache.org/jira/browse/HBASE-14708) | Use copy on write Map for region location cache | Critical | Client |
| [HBASE-14766](https://issues.apache.org/jira/browse/HBASE-14766) | In WALEntryFilter, cell.getFamily() needs to be replaced with the new low-cost implementation | Major | . |
| [HBASE-14387](https://issues.apache.org/jira/browse/HBASE-14387) | Compaction improvements: Maximum off-peak compaction size | Major | Compaction, Performance |
| [HBASE-14693](https://issues.apache.org/jira/browse/HBASE-14693) | Add client-side metrics for received pushback signals | Major | Client, metrics |
| [HBASE-14765](https://issues.apache.org/jira/browse/HBASE-14765) | Remove snappy profile | Major | build |
| [HBASE-14752](https://issues.apache.org/jira/browse/HBASE-14752) | Add example of using the HBase client in a multi-threaded environment | Minor | Client |
| [HBASE-14666](https://issues.apache.org/jira/browse/HBASE-14666) | Remove deprecated HBaseTestingUtility#deleteTable methods | Major | test |
| [HBASE-12986](https://issues.apache.org/jira/browse/HBASE-12986) | Compaction pressure based client pushback | Major | . |
| [HBASE-12822](https://issues.apache.org/jira/browse/HBASE-12822) | Option for Unloading regions through region\_mover.rb without Acknowledging | Minor | . |
| [HBASE-13742](https://issues.apache.org/jira/browse/HBASE-13742) | buildbot should run link checker over book | Major | documentation |
| [HBASE-14700](https://issues.apache.org/jira/browse/HBASE-14700) | Support a "permissive" mode for secure clusters to allow "simple" auth clients | Major | security |
| [HBASE-14715](https://issues.apache.org/jira/browse/HBASE-14715) | Add javadocs to DelegatingRetryingCallable | Trivial | Client |
| [HBASE-13014](https://issues.apache.org/jira/browse/HBASE-13014) | Java Tool For Region Moving | Major | . |
| [HBASE-14731](https://issues.apache.org/jira/browse/HBASE-14731) | Add -DuseMob option to ITBLL | Major | . |
| [HBASE-14687](https://issues.apache.org/jira/browse/HBASE-14687) | Un-synchronize BufferedMutator | Critical | Client, Performance |
| [HBASE-14721](https://issues.apache.org/jira/browse/HBASE-14721) | Memstore add cells - Avoid many garbage | Major | regionserver |
| [HBASE-14714](https://issues.apache.org/jira/browse/HBASE-14714) | some cleanup to snapshot code | Trivial | snapshots |
| [HBASE-14675](https://issues.apache.org/jira/browse/HBASE-14675) | Exorcise deprecated Put#add(...) and replace with Put#addColumn(...) | Major | . |
| [HBASE-14672](https://issues.apache.org/jira/browse/HBASE-14672) | Exorcise deprecated Delete#delete\* apis | Major | . |
| [HBASE-12769](https://issues.apache.org/jira/browse/HBASE-12769) | Replication fails to delete all corresponding zk nodes when peer is removed | Minor | Replication |
| [HBASE-14696](https://issues.apache.org/jira/browse/HBASE-14696) | Support setting allowPartialResults in mapreduce Mappers | Major | mapreduce |
| [HBASE-14266](https://issues.apache.org/jira/browse/HBASE-14266) | RegionServers have a lock contention of Configuration.getProps | Critical | regionserver |
| [HBASE-14683](https://issues.apache.org/jira/browse/HBASE-14683) | Batching in buffered mutator is awful when adding lists of mutations. | Major | Client |
| [HBASE-14670](https://issues.apache.org/jira/browse/HBASE-14670) | Remove deprecated HBaseTestCase from TestBlocksRead | Major | test |
| [HBASE-14669](https://issues.apache.org/jira/browse/HBASE-14669) | remove unused import and fix javadoc | Trivial | . |
| [HBASE-14671](https://issues.apache.org/jira/browse/HBASE-14671) | Remove deprecated HBaseTestCase/Put/Delete apis from TestGetClosestAtOrBefore | Major | test |
| [HBASE-14665](https://issues.apache.org/jira/browse/HBASE-14665) | Remove deprecated HBaseTestingUtility#createTable methods | Major | test |
| [HBASE-14668](https://issues.apache.org/jira/browse/HBASE-14668) | Remove deprecated HBaseTestCase dependency from TestHFile | Major | test |
| [HBASE-14643](https://issues.apache.org/jira/browse/HBASE-14643) | Avoid Splits from once again opening a closed reader for fetching the first and last key | Major | regionserver |
| [HBASE-14586](https://issues.apache.org/jira/browse/HBASE-14586) | Use a maven profile to run Jacoco analysis | Minor | pom |
| [HBASE-14268](https://issues.apache.org/jira/browse/HBASE-14268) | Improve KeyLocker | Minor | util |
| [HBASE-14588](https://issues.apache.org/jira/browse/HBASE-14588) | Stop accessing test resources from within src folder | Major | build, test |
| [HBASE-14587](https://issues.apache.org/jira/browse/HBASE-14587) | Attach a test-sources.jar for hbase-server | Major | build |
| [HBASE-14582](https://issues.apache.org/jira/browse/HBASE-14582) | Regionserver status webpage bucketcache list can become huge | Major | regionserver |
| [HBASE-14517](https://issues.apache.org/jira/browse/HBASE-14517) | Show regionserver's version in master status page | Minor | monitoring |
| [HBASE-14565](https://issues.apache.org/jira/browse/HBASE-14565) | Make ZK connection timeout configurable in MiniZooKeeperCluster | Major | . |
| [HBASE-14574](https://issues.apache.org/jira/browse/HBASE-14574) | TableOutputFormat#getRecordWriter javadoc misleads | Major | . |
| [HBASE-14573](https://issues.apache.org/jira/browse/HBASE-14573) | Edit on the ByteBufferedCell javadoc | Major | documentation |
| [HBASE-14436](https://issues.apache.org/jira/browse/HBASE-14436) | HTableDescriptor#addCoprocessor will always make RegionCoprocessorHost create new Configuration | Minor | Coprocessors |
| [HBASE-14520](https://issues.apache.org/jira/browse/HBASE-14520) | Optimize the number of calls for tags creation in bulk load | Major | . |
| [HBASE-14547](https://issues.apache.org/jira/browse/HBASE-14547) | Add more debug/trace to zk-procedure | Trivial | snapshots |
| [HBASE-14230](https://issues.apache.org/jira/browse/HBASE-14230) | replace reflection in FSHlog with HdfsDataOutputStream#getCurrentBlockReplication() | Minor | wal |
| [HBASE-14478](https://issues.apache.org/jira/browse/HBASE-14478) | A ThreadPoolExecutor with a LinkedBlockingQueue cannot execute tasks concurrently | Major | regionserver |
| [HBASE-14455](https://issues.apache.org/jira/browse/HBASE-14455) | Try to get rid of unused HConnection instance | Minor | . |
| [HBASE-14193](https://issues.apache.org/jira/browse/HBASE-14193) | Remove support for direct upgrade from pre-0.96 versions | Minor | . |
| [HBASE-14461](https://issues.apache.org/jira/browse/HBASE-14461) | Cleanup IncreasingToUpperBoundRegionSplitPolicy | Minor | . |
| [HBASE-14448](https://issues.apache.org/jira/browse/HBASE-14448) | Refine RegionGroupingProvider Phase-2: remove provider nesting and formalize wal group name | Major | . |
| [HBASE-14082](https://issues.apache.org/jira/browse/HBASE-14082) | Add replica id to JMX metrics names | Major | metrics |
| [HBASE-14334](https://issues.apache.org/jira/browse/HBASE-14334) | Move Memcached block cache in to it's own optional module. | Major | BlockCache, build, Operability |
| [HBASE-14306](https://issues.apache.org/jira/browse/HBASE-14306) | Refine RegionGroupingProvider: fix issues and make it more scalable | Major | wal |
| [HBASE-6617](https://issues.apache.org/jira/browse/HBASE-6617) | ReplicationSourceManager should be able to track multiple WAL paths | Major | Replication |
| [HBASE-14314](https://issues.apache.org/jira/browse/HBASE-14314) | Metrics for block cache should take region replicas into account | Major | metrics, regionserver |
| [HBASE-12988](https://issues.apache.org/jira/browse/HBASE-12988) | [Replication]Parallel apply edits across regions | Major | Replication |
| [HBASE-14261](https://issues.apache.org/jira/browse/HBASE-14261) | Enhance Chaos Monkey framework by adding zookeeper and datanode fault injections. | Major | integration tests |
| [HBASE-7972](https://issues.apache.org/jira/browse/HBASE-7972) | Add a configuration for the TCP backlog in the Thrift server | Major | Thrift |
| [HBASE-14332](https://issues.apache.org/jira/browse/HBASE-14332) | Show the table state when we encounter exception while disabling / enabling table | Minor | . |
| [HBASE-14325](https://issues.apache.org/jira/browse/HBASE-14325) | Add snapshotinfo command to hbase script | Minor | scripts |
| [HBASE-14309](https://issues.apache.org/jira/browse/HBASE-14309) | Allow load balancer to operate when there is region in transition by adding force flag | Major | . |
| [HBASE-14078](https://issues.apache.org/jira/browse/HBASE-14078) | improve error message when HMaster can't bind to port | Major | master |
| [HBASE-13127](https://issues.apache.org/jira/browse/HBASE-13127) | Add timeouts on all tests so less zombie sightings | Major | test |
| [HBASE-13996](https://issues.apache.org/jira/browse/HBASE-13996) | Add write sniffing in canary | Major | canary |
| [HBASE-14260](https://issues.apache.org/jira/browse/HBASE-14260) | don't build javadocs for hbase-protocol module | Major | build, documentation |
| [HBASE-14148](https://issues.apache.org/jira/browse/HBASE-14148) | Web UI Framable Page | Major | security, UI |
| [HBASE-14165](https://issues.apache.org/jira/browse/HBASE-14165) | The initial size of RWQueueRpcExecutor.queues should be (numWriteQueues + numReadQueues + numScanQueues) | Minor | IPC/RPC |
| [HBASE-14203](https://issues.apache.org/jira/browse/HBASE-14203) | remove duplicate code getTableDescriptor in HTable | Trivial | . |
| [HBASE-13914](https://issues.apache.org/jira/browse/HBASE-13914) | Minor improvements to dev-support/publish\_hbase\_website.sh | Minor | website |
| [HBASE-12812](https://issues.apache.org/jira/browse/HBASE-12812) | Update Netty dependency to latest release | Major | . |
| [HBASE-13985](https://issues.apache.org/jira/browse/HBASE-13985) | Add configuration to skip validating HFile format when bulk loading | Minor | . |
| [HBASE-14122](https://issues.apache.org/jira/browse/HBASE-14122) | Client API for determining if server side supports cell level security | Minor | . |
| [HBASE-14194](https://issues.apache.org/jira/browse/HBASE-14194) | Undeprecate methods in ThriftServerRunner.HBaseHandler | Trivial | . |
| [HBASE-12256](https://issues.apache.org/jira/browse/HBASE-12256) | Update patch submission guidelines to call out binary file support | Minor | documentation |
| [HBASE-13965](https://issues.apache.org/jira/browse/HBASE-13965) | Stochastic Load Balancer JMX Metrics | Major | Balancer, metrics |
| [HBASE-14164](https://issues.apache.org/jira/browse/HBASE-14164) | Display primary region replicas distribution on table.jsp | Minor | . |
| [HBASE-14097](https://issues.apache.org/jira/browse/HBASE-14097) | Log link to client scan troubleshooting section when scanner exceptions happen. | Trivial | . |
| [HBASE-14152](https://issues.apache.org/jira/browse/HBASE-14152) | Fix the warnings in Checkstyle and FindBugs brought in by merging hbase-11339 | Major | mob |
| [HBASE-14151](https://issues.apache.org/jira/browse/HBASE-14151) | Remove the unnecessary file ProtobufUtil.java.rej which is brought in by merging hbase-11339 | Major | mob |
| [HBASE-14058](https://issues.apache.org/jira/browse/HBASE-14058) | Stabilizing default heap memory tuner | Major | regionserver |
| [HBASE-14110](https://issues.apache.org/jira/browse/HBASE-14110) | Add CostFunction for balancing primary region replicas | Major | Balancer |
| [HBASE-8642](https://issues.apache.org/jira/browse/HBASE-8642) | [Snapshot] List and delete snapshot by table | Major | snapshots |
| [HBASE-14045](https://issues.apache.org/jira/browse/HBASE-14045) | Bumping thrift version to 0.9.2. | Major | . |
| [HBASE-12596](https://issues.apache.org/jira/browse/HBASE-12596) | bulkload needs to follow locality | Major | HFile, regionserver |
| [HBASE-13927](https://issues.apache.org/jira/browse/HBASE-13927) | Allow hbase-daemon.sh to conditionally redirect the log or not | Major | shell |
| [HBASE-14002](https://issues.apache.org/jira/browse/HBASE-14002) | Add --noReplicationSetup option to IntegrationTestReplication | Major | integration tests |
| [HBASE-13925](https://issues.apache.org/jira/browse/HBASE-13925) | Use zookeeper multi to clear znodes in ZKProcedureUtil | Major | Zookeeper |
| [HBASE-13500](https://issues.apache.org/jira/browse/HBASE-13500) | Deprecate KVComparator and move to CellComparator | Major | . |
| [HBASE-14015](https://issues.apache.org/jira/browse/HBASE-14015) | Allow setting a richer state value when toString a pv2 | Minor | proc-v2 |
| [HBASE-13980](https://issues.apache.org/jira/browse/HBASE-13980) | Distinguish blockedFlushCount vs unblockedFlushCount when tuning heap memory | Minor | . |
| [HBASE-13670](https://issues.apache.org/jira/browse/HBASE-13670) | [HBase MOB] ExpiredMobFileCleaner tool deletes mob files later for one more day after they are expired | Major | documentation, mob |
| [HBASE-13943](https://issues.apache.org/jira/browse/HBASE-13943) | Get rid of KeyValue#heapSizeWithoutTags | Major | . |
| [HBASE-14001](https://issues.apache.org/jira/browse/HBASE-14001) | Optimize write(OutputStream out, boolean withTags) for SizeCachedNoTagsKeyValue | Minor | . |
| [HBASE-13103](https://issues.apache.org/jira/browse/HBASE-13103) | [ergonomics] add region size balancing as a feature of master | Major | Balancer, Usability |
| [HBASE-13900](https://issues.apache.org/jira/browse/HBASE-13900) | duplicate methods between ProtobufMagic and ProtobufUtil | Minor | . |
| [HBASE-13931](https://issues.apache.org/jira/browse/HBASE-13931) | Move Unsafe based operations to UnsafeAccess | Major | . |
| [HBASE-13917](https://issues.apache.org/jira/browse/HBASE-13917) | Remove string comparison to identify request priority | Minor | regionserver |
| [HBASE-13876](https://issues.apache.org/jira/browse/HBASE-13876) | Improving performance of HeapMemoryManager | Minor | hbase, regionserver |
| [HBASE-13247](https://issues.apache.org/jira/browse/HBASE-13247) | Change BufferedMutatorExample to use addColumn() since add() is deprecated | Trivial | Client |
| [HBASE-13894](https://issues.apache.org/jira/browse/HBASE-13894) | Avoid visitor alloc each call of ByteBufferArray get/putMultiple() | Minor | regionserver |
| [HBASE-13829](https://issues.apache.org/jira/browse/HBASE-13829) | Add more ThrottleType | Major | Client |
| [HBASE-13755](https://issues.apache.org/jira/browse/HBASE-13755) | Provide single super user check implementation | Major | security |
| [HBASE-13848](https://issues.apache.org/jira/browse/HBASE-13848) | Access InfoServer SSL passwords through Credential Provder API | Major | security |
| [HBASE-13828](https://issues.apache.org/jira/browse/HBASE-13828) | Add group permissions testing coverage to AC. | Major | test |
| [HBASE-13846](https://issues.apache.org/jira/browse/HBASE-13846) | Run MiniCluster on top of other MiniDfsCluster | Minor | test |
| [HBASE-13816](https://issues.apache.org/jira/browse/HBASE-13816) | Build shaded modules only in release profile | Major | build |
| [HBASE-13344](https://issues.apache.org/jira/browse/HBASE-13344) | Add enforcer rule that matches our JDK support statement | Minor | build |
| [HBASE-13761](https://issues.apache.org/jira/browse/HBASE-13761) | Optimize FuzzyRowFilter | Minor | Filters |
| [HBASE-13710](https://issues.apache.org/jira/browse/HBASE-13710) | Remove use of Hadoop's ReflectionUtil in favor of our own. | Minor | . |
| [HBASE-13780](https://issues.apache.org/jira/browse/HBASE-13780) | Default to 700 for HDFS root dir permissions for secure deployments | Major | Operability, security |
| [HBASE-13671](https://issues.apache.org/jira/browse/HBASE-13671) | More classes to add to the invoking repository of org.apache.hadoop.hbase.mapreduce.driver | Major | mapreduce |
| [HBASE-13745](https://issues.apache.org/jira/browse/HBASE-13745) | Say why a flush was requested in log message | Minor | Operability |
| [HBASE-13645](https://issues.apache.org/jira/browse/HBASE-13645) | Rename \*column methods in MasterObserver to \*columnFamily | Minor | . |
| [HBASE-13725](https://issues.apache.org/jira/browse/HBASE-13725) | [documentation] Pseudo-Distributed Local Install can link to hadoop instructions | Minor | . |
| [HBASE-13656](https://issues.apache.org/jira/browse/HBASE-13656) | Rename getDeadServers to getDeadServersSize in Admin | Minor | . |
| [HBASE-13675](https://issues.apache.org/jira/browse/HBASE-13675) | ProcedureExecutor completion report should be at DEBUG log level | Minor | . |
| [HBASE-13673](https://issues.apache.org/jira/browse/HBASE-13673) | WALProcedureStore procedure is chatty | Minor | . |
| [HBASE-13677](https://issues.apache.org/jira/browse/HBASE-13677) | RecoverableZookeeper WARNs on expected events | Minor | . |
| [HBASE-13684](https://issues.apache.org/jira/browse/HBASE-13684) | Allow mlockagent to be used when not starting as root | Minor | . |
| [HBASE-13655](https://issues.apache.org/jira/browse/HBASE-13655) | Deprecate duplicate getCompression methods in HColumnDescriptor | Minor | . |
| [HBASE-13251](https://issues.apache.org/jira/browse/HBASE-13251) | Correct 'HBase, MapReduce, and the CLASSPATH' section in HBase Ref Guide | Major | documentation |
| [HBASE-13598](https://issues.apache.org/jira/browse/HBASE-13598) | Make hbase assembly 'attach' to the project | Minor | . |
| [HBASE-12415](https://issues.apache.org/jira/browse/HBASE-12415) | Add add(byte[][] arrays) to Bytes. | Major | API, Client |
| [HBASE-13358](https://issues.apache.org/jira/browse/HBASE-13358) | Upgrade VisibilityClient API to accept Connection object. | Minor | API, security |
| [HBASE-13420](https://issues.apache.org/jira/browse/HBASE-13420) | RegionEnvironment.offerExecutionLatency Blocks Threads under Heavy Load | Major | Coprocessors, metrics, Performance |
| [HBASE-13351](https://issues.apache.org/jira/browse/HBASE-13351) | Annotate internal MasterRpcServices methods with admin priority | Major | master |
| [HBASE-13431](https://issues.apache.org/jira/browse/HBASE-13431) | Allow to skip store file range check based on column family while creating reference files in HRegionFileSystem#splitStoreFile | Major | . |
| [HBASE-13578](https://issues.apache.org/jira/browse/HBASE-13578) | Remove Arrays.asList().subList() from FSHLog.offer() | Trivial | wal |
| [HBASE-13518](https://issues.apache.org/jira/browse/HBASE-13518) | Typo in hbase.hconnection.meta.lookup.threads.core parameter | Major | . |
| [HBASE-13516](https://issues.apache.org/jira/browse/HBASE-13516) | Increase PermSize to 128MB | Major | . |
| [HBASE-13255](https://issues.apache.org/jira/browse/HBASE-13255) | Bad grammar in RegionServer status page | Trivial | monitoring |
| [HBASE-13334](https://issues.apache.org/jira/browse/HBASE-13334) | FindBugs should create precise report for new bugs introduced | Minor | build |
| [HBASE-13550](https://issues.apache.org/jira/browse/HBASE-13550) | [Shell] Support unset of a list of table attributes | Minor | . |
| [HBASE-13552](https://issues.apache.org/jira/browse/HBASE-13552) | ChoreService shutdown message could be more informative | Trivial | . |
| [HBASE-13534](https://issues.apache.org/jira/browse/HBASE-13534) | Change HBase master WebUI to explicitly mention if it is a backup master | Minor | master, UI |
| [HBASE-13456](https://issues.apache.org/jira/browse/HBASE-13456) | Improve HFilePrettyPrinter first hbase:meta region processing | Minor | util |
| [HBASE-12987](https://issues.apache.org/jira/browse/HBASE-12987) | HBCK should print status while scanning over many regions | Major | hbck, Usability |
| [HBASE-13350](https://issues.apache.org/jira/browse/HBASE-13350) | Add a debug-warn if we fail HTD checks even if table.sanity.checks is false | Trivial | master, Operability |
| [HBASE-13453](https://issues.apache.org/jira/browse/HBASE-13453) | Master should not bind to region server ports | Critical | . |
| [HBASE-13419](https://issues.apache.org/jira/browse/HBASE-13419) | Thrift gateway should propagate text from exception causes. | Major | Thrift |
| [HBASE-13436](https://issues.apache.org/jira/browse/HBASE-13436) | Include user name in ADE for scans | Minor | . |
| [HBASE-13381](https://issues.apache.org/jira/browse/HBASE-13381) | Expand TestSizeFailures to include small scans | Minor | test |
| [HBASE-13270](https://issues.apache.org/jira/browse/HBASE-13270) | Setter for Result#getStats is #addResults; confusing! | Major | Client |
| [HBASE-13362](https://issues.apache.org/jira/browse/HBASE-13362) | Set max result size from client only (like scanner caching). | Major | . |
| [HBASE-11864](https://issues.apache.org/jira/browse/HBASE-11864) | Enhance HLogPrettyPrinter to print information from WAL Header | Minor | . |
| [HBASE-13370](https://issues.apache.org/jira/browse/HBASE-13370) | PE tool could give option for using Explicit Column Tracker which leads to seeks | Major | . |
| [HBASE-6919](https://issues.apache.org/jira/browse/HBASE-6919) | Remove unnecessary throws IOException from Bytes.readVLong | Minor | . |
| [HBASE-12891](https://issues.apache.org/jira/browse/HBASE-12891) | Parallel execution for Hbck checkRegionConsistency | Major | hbck |
| [HBASE-13341](https://issues.apache.org/jira/browse/HBASE-13341) | Add option to disable filtering on interface annotations for the API compatibility report | Minor | . |
| [HBASE-13340](https://issues.apache.org/jira/browse/HBASE-13340) | Include LimitedPrivate interfaces in the API compatibility report | Minor | API |
| [HBASE-13366](https://issues.apache.org/jira/browse/HBASE-13366) | Throw DoNotRetryIOException instead of read only IOException | Minor | . |
| [HBASE-13345](https://issues.apache.org/jira/browse/HBASE-13345) | Fix LocalHBaseCluster so that different region server impl can be used for different slaves | Minor | . |
| [HBASE-13348](https://issues.apache.org/jira/browse/HBASE-13348) | Separate the thread number configs for meta server and server operations | Minor | master |
| [HBASE-12975](https://issues.apache.org/jira/browse/HBASE-12975) | Supportable SplitTransaction and RegionMergeTransaction interfaces | Major | . |
| [HBASE-13369](https://issues.apache.org/jira/browse/HBASE-13369) | Expose scanNext stats to region server level | Major | . |
| [HBASE-13222](https://issues.apache.org/jira/browse/HBASE-13222) | Provide means of non-destructive balancer inspection | Minor | Balancer |
| [HBASE-13316](https://issues.apache.org/jira/browse/HBASE-13316) | Reduce the downtime on planned moves of regions | Minor | Balancer |
| [HBASE-13342](https://issues.apache.org/jira/browse/HBASE-13342) | Fix incorrect interface annotations | Major | . |
| [HBASE-13199](https://issues.apache.org/jira/browse/HBASE-13199) | Some small improvements on canary tool | Major | . |
| [HBASE-13286](https://issues.apache.org/jira/browse/HBASE-13286) | Minimum timeout for a rpc call could be 1 ms instead of 2 seconds | Minor | Client |
| [HBASE-13241](https://issues.apache.org/jira/browse/HBASE-13241) | Add tests for group level grants | Critical | security, test |
| [HBASE-13235](https://issues.apache.org/jira/browse/HBASE-13235) | Revisit the security auditing semantics. | Major | . |
| [HBASE-13216](https://issues.apache.org/jira/browse/HBASE-13216) | Add version info in RPC connection header | Minor | Client, IPC/RPC |
| [HBASE-13109](https://issues.apache.org/jira/browse/HBASE-13109) | Make better SEEK vs SKIP decisions during scanning | Major | . |
| [HBASE-13256](https://issues.apache.org/jira/browse/HBASE-13256) | HBaseConfiguration#checkDefaultsVersion(Configuration) has spelling error | Trivial | Client |
| [HBASE-13223](https://issues.apache.org/jira/browse/HBASE-13223) | Add testMoveMeta to IntegrationTestMTTR | Major | integration tests |
| [HBASE-13240](https://issues.apache.org/jira/browse/HBASE-13240) | add an exemption to test-patch for build-only changes. | Minor | build |
| [HBASE-13236](https://issues.apache.org/jira/browse/HBASE-13236) | Clean up m2e-related warnings/errors from poms | Minor | build |
| [HBASE-13162](https://issues.apache.org/jira/browse/HBASE-13162) | Add capability for cleaning hbase acls to hbase cleanup script. | Minor | . |
| [HBASE-12405](https://issues.apache.org/jira/browse/HBASE-12405) | WAL accounting by Store | Major | wal |
| [HBASE-13185](https://issues.apache.org/jira/browse/HBASE-13185) | Document hbase.regionserver.thrift.framed.max\_frame\_size\_in\_mb more clearly | Trivial | documentation |
| [HBASE-13183](https://issues.apache.org/jira/browse/HBASE-13183) | Make ZK tickTime configurable in standalone HBase | Minor | master |
| [HBASE-12706](https://issues.apache.org/jira/browse/HBASE-12706) | Support multiple port numbers in ZK quorum string | Critical | . |
| [HBASE-13142](https://issues.apache.org/jira/browse/HBASE-13142) | [PERF] Reuse the IPCUtil#buildCellBlock buffer | Major | Performance |
| [HBASE-13122](https://issues.apache.org/jira/browse/HBASE-13122) | Improve efficiency for return codes of some filters | Major | Filters |
| [HBASE-13128](https://issues.apache.org/jira/browse/HBASE-13128) | Make HBCK's lock file retry creation and deletion | Minor | hbck |
| [HBASE-13100](https://issues.apache.org/jira/browse/HBASE-13100) | Shell command to retrieve table splits | Minor | shell |
| [HBASE-13132](https://issues.apache.org/jira/browse/HBASE-13132) | Improve RemoveColumn action debug message | Trivial | integration tests |
| [HBASE-13138](https://issues.apache.org/jira/browse/HBASE-13138) | Clean up TestMasterObserver (debug, trying to figure why fails) | Major | test |
| [HBASE-13120](https://issues.apache.org/jira/browse/HBASE-13120) | Allow disabling hadoop classpath and native library lookup | Major | hbase |
| [HBASE-13086](https://issues.apache.org/jira/browse/HBASE-13086) | Show ZK root node on Master WebUI | Minor | master |
| [HBASE-13080](https://issues.apache.org/jira/browse/HBASE-13080) | Hbase shell message containing extra quote at the end of error message. | Trivial | . |
| [HBASE-13054](https://issues.apache.org/jira/browse/HBASE-13054) | Provide more tracing information for locking/latching events. | Major | . |
| [HBASE-13056](https://issues.apache.org/jira/browse/HBASE-13056) | Refactor table.jsp code to remove repeated code and make it easier to add new checks | Major | . |
| [HBASE-13002](https://issues.apache.org/jira/browse/HBASE-13002) | Make encryption cipher configurable | Major | . |
| [HBASE-13059](https://issues.apache.org/jira/browse/HBASE-13059) | Set executable bit for scripts in dev-support | Trivial | scripts |
| [HBASE-13044](https://issues.apache.org/jira/browse/HBASE-13044) | Configuration option for disabling coprocessor loading | Minor | . |
| [HBASE-13018](https://issues.apache.org/jira/browse/HBASE-13018) | WALSplitter should not try to get table states while splitting META | Critical | . |
| [HBASE-13016](https://issues.apache.org/jira/browse/HBASE-13016) | Clean up remnants of table states stored in table descriptors | Major | . |
| [HBASE-12035](https://issues.apache.org/jira/browse/HBASE-12035) | Keep table state in META | Critical | Client, master |
| [HBASE-12982](https://issues.apache.org/jira/browse/HBASE-12982) | Adding timeouts to TestChoreService | Major | . |
| [HBASE-12957](https://issues.apache.org/jira/browse/HBASE-12957) | region\_mover#isSuccessfulScan may be extremely slow on region with lots of expired data | Minor | scripts |
| [HBASE-8329](https://issues.apache.org/jira/browse/HBASE-8329) | Limit compaction speed | Major | Compaction |
| [HBASE-12808](https://issues.apache.org/jira/browse/HBASE-12808) | Use Java API Compliance Checker for binary/source compatibility | Major | test |
| [HBASE-12627](https://issues.apache.org/jira/browse/HBASE-12627) | Add back snapshot batching facility from HBASE-11360 dropped by HBASE-11742 | Major | master, scaling |
| [HBASE-12896](https://issues.apache.org/jira/browse/HBASE-12896) | checkstyle report diff tool | Minor | build |
| [HBASE-12887](https://issues.apache.org/jira/browse/HBASE-12887) | Cleanup many checkstyle errors in o.a.h.h.client | Minor | build, Client |
| [HBASE-12840](https://issues.apache.org/jira/browse/HBASE-12840) | Improve unit test coverage of the client pushback mechanism | Major | . |
| [HBASE-12620](https://issues.apache.org/jira/browse/HBASE-12620) | Add HBASE-11639 related items to Ref Guide | Major | documentation |
| [HBASE-7541](https://issues.apache.org/jira/browse/HBASE-7541) | Convert all tests that use HBaseTestingUtility.createMultiRegions to HBA.createTable | Major | . |
| [HBASE-11144](https://issues.apache.org/jira/browse/HBASE-11144) | Filter to support scanning multiple row key ranges | Major | Filters |
| [HBASE-12839](https://issues.apache.org/jira/browse/HBASE-12839) | Remove synchronization in ServerStatisticsTracker | Minor | . |
| [HBASE-12796](https://issues.apache.org/jira/browse/HBASE-12796) | Clean up HTable and HBaseAdmin deprecated constructor usage | Major | . |
| [HBASE-12761](https://issues.apache.org/jira/browse/HBASE-12761) | On region jump ClientScanners should get next row start key instead of a skip. | Major | . |
| [HBASE-11869](https://issues.apache.org/jira/browse/HBASE-11869) | Support snapshot owner | Minor | . |
| [HBASE-12429](https://issues.apache.org/jira/browse/HBASE-12429) | Add port to ClusterManager's actions. | Major | integration tests |
| [HBASE-12590](https://issues.apache.org/jira/browse/HBASE-12590) | A solution for data skew in HBase-Mapreduce Job | Major | mapreduce |
| [HBASE-12223](https://issues.apache.org/jira/browse/HBASE-12223) | MultiTableInputFormatBase.getSplits is too slow | Minor | Client |
| [HBASE-10201](https://issues.apache.org/jira/browse/HBASE-10201) | Port 'Make flush decisions per column family' to trunk | Major | wal |
| [HBASE-12601](https://issues.apache.org/jira/browse/HBASE-12601) | Explain how to grant/revoke permission to a group/namespace in grant/revoke command usage | Minor | documentation, security, shell |
| [HBASE-12650](https://issues.apache.org/jira/browse/HBASE-12650) | Move ServerName to hbase-common module | Blocker | . |
| [HBASE-12559](https://issues.apache.org/jira/browse/HBASE-12559) | Provide LoadBalancer with online configuration capability | Major | . |
| [HBASE-11939](https://issues.apache.org/jira/browse/HBASE-11939) | Document compressed blockcache | Major | documentation |
| [HBASE-12207](https://issues.apache.org/jira/browse/HBASE-12207) | A script to help keep your Git repo fresh | Major | documentation, scripts |
| [HBASE-12251](https://issues.apache.org/jira/browse/HBASE-12251) | [book] Hadoop compat matrix 0.94 section needs cleaned up | Major | documentation |
| [HBASE-12220](https://issues.apache.org/jira/browse/HBASE-12220) | Add hedgedReads and hedgedReadWins metrics | Major | . |
| [HBASE-12195](https://issues.apache.org/jira/browse/HBASE-12195) | Fix dev-support/findHangingTests | Minor | test |
| [HBASE-12003](https://issues.apache.org/jira/browse/HBASE-12003) | Fix SecureBulkLoadEndpoint class javadoc formatting | Trivial | documentation, security |
| [HBASE-6290](https://issues.apache.org/jira/browse/HBASE-6290) | Add a function a mark a server as dead and start the recovery the process | Minor | monitoring |
| [HBASE-11862](https://issues.apache.org/jira/browse/HBASE-11862) | Get rid of Writables in HTableDescriptor, HColumnDescriptor | Minor | . |
| [HBASE-11760](https://issues.apache.org/jira/browse/HBASE-11760) | Tighten up region state transition | Major | Region Assignment |
| [HBASE-11611](https://issues.apache.org/jira/browse/HBASE-11611) | Clean up ZK-based region assignment | Major | Region Assignment |
| [HBASE-11585](https://issues.apache.org/jira/browse/HBASE-11585) | PE: Allows warm-up | Trivial | test |
| [HBASE-3135](https://issues.apache.org/jira/browse/HBASE-3135) | Make our MR jobs implement Tool and use ToolRunner so can do -D trickery, etc. | Major | . |
| [HBASE-11548](https://issues.apache.org/jira/browse/HBASE-11548) | [PE] Add 'cycling' test N times and unit tests for size/zipf/valueSize calculations | Trivial | test |
| [HBASE-11400](https://issues.apache.org/jira/browse/HBASE-11400) | Edit, consolidate, and update Compression and data encoding docs | Minor | documentation |
| [HBASE-5696](https://issues.apache.org/jira/browse/HBASE-5696) | Use Hadoop's DataOutputOutputStream instead of have a copy local | Major | . |
| [HBASE-11344](https://issues.apache.org/jira/browse/HBASE-11344) | Hide row keys and such from the web UIs | Major | . |
| [HBASE-6580](https://issues.apache.org/jira/browse/HBASE-6580) | Deprecate HTablePool in favor of HConnection.getTable(...) | Major | . |
### BUG FIXES:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-19924](https://issues.apache.org/jira/browse/HBASE-19924) | hbase rpc throttling does not work for multi() with request count rater. | Major | rpc |
| [HBASE-20293](https://issues.apache.org/jira/browse/HBASE-20293) | get\_splits returns duplicate split points when region replication is on | Minor | shell |
| [HBASE-20464](https://issues.apache.org/jira/browse/HBASE-20464) | Disable IMC | Major | in-memory-compaction |
| [HBASE-20442](https://issues.apache.org/jira/browse/HBASE-20442) | clean up incorrect use of commons-collections 3 | Major | dependencies, thirdparty |
| [HBASE-20440](https://issues.apache.org/jira/browse/HBASE-20440) | Clean up incorrect use of commons-lang 2.y | Major | dependencies |
| [HBASE-20439](https://issues.apache.org/jira/browse/HBASE-20439) | Clean up incorrect use of commons-logging in hbase-server | Minor | dependencies, logging |
| [HBASE-20398](https://issues.apache.org/jira/browse/HBASE-20398) | Redirect doesn't work on web UI | Major | UI |
| [HBASE-20399](https://issues.apache.org/jira/browse/HBASE-20399) | Fix merge layout | Minor | UI |
| [HBASE-20233](https://issues.apache.org/jira/browse/HBASE-20233) | [metrics] Ill-formatted numRegions metric in "Hadoop:service=HBase,name=RegionServer,sub=Regions" mbean | Trivial | metrics, Operability |
| [HBASE-20410](https://issues.apache.org/jira/browse/HBASE-20410) | upgrade protoc compiler to 3.5.1-1 | Critical | build, dependencies, Protobufs |
| [HBASE-20224](https://issues.apache.org/jira/browse/HBASE-20224) | Web UI is broken in standalone mode | Blocker | UI, Usability |
| [HBASE-20394](https://issues.apache.org/jira/browse/HBASE-20394) | HBase over rides the value of HBASE\_OPTS (if any) set by client | Minor | Operability |
| [HBASE-20397](https://issues.apache.org/jira/browse/HBASE-20397) | Make it more explicit that monkey.properties is found on CLASSPATH | Trivial | . |
| [HBASE-20376](https://issues.apache.org/jira/browse/HBASE-20376) | RowCounter and CellCounter documentations are incorrect | Minor | documentation, mapreduce |
| [HBASE-20330](https://issues.apache.org/jira/browse/HBASE-20330) | ProcedureExecutor.start() gets stuck in recover lease on store. | Major | proc-v2 |
| [HBASE-20350](https://issues.apache.org/jira/browse/HBASE-20350) | NullPointerException in Scanner during close() | Blocker | . |
| [HBASE-20280](https://issues.apache.org/jira/browse/HBASE-20280) | Fix possibility of deadlocking in refreshFileConnections when prefetch is enabled | Major | BucketCache |
| [HBASE-20310](https://issues.apache.org/jira/browse/HBASE-20310) | [hbck] bin/hbase hbck -metaonly shows false inconsistency on HBase 2 | Major | hbck |
| [HBASE-20219](https://issues.apache.org/jira/browse/HBASE-20219) | An error occurs when scanning with reversed=true and loadColumnFamiliesOnDemand=true | Critical | phoenix |
| [HBASE-20358](https://issues.apache.org/jira/browse/HBASE-20358) | Fix bin/hbase thrift usage text | Minor | . |
| [HBASE-20382](https://issues.apache.org/jira/browse/HBASE-20382) | If RSGroups not enabled, rsgroup.jsp prints stack trace | Major | rsgroup, UI |
| [HBASE-20385](https://issues.apache.org/jira/browse/HBASE-20385) | Purge md5-making from our little make\_rc.sh script | Minor | . |
| [HBASE-20384](https://issues.apache.org/jira/browse/HBASE-20384) | [AMv2] Logging format improvements; use encoded name rather than full region name marking transitions | Minor | . |
| [HBASE-20182](https://issues.apache.org/jira/browse/HBASE-20182) | Can not locate region after split and merge | Blocker | Region Assignment |
| [HBASE-20363](https://issues.apache.org/jira/browse/HBASE-20363) | TestNamespaceAuditor.testRegionMerge is flaky | Major | test |
| [HBASE-20362](https://issues.apache.org/jira/browse/HBASE-20362) | TestMasterShutdown.testMasterShutdownBeforeStartingAnyRegionServer is flaky | Major | test |
| [HBASE-20295](https://issues.apache.org/jira/browse/HBASE-20295) | TableOutputFormat.checkOutputSpecs throw NullPointerException Exception | Major | mapreduce |
| [HBASE-20343](https://issues.apache.org/jira/browse/HBASE-20343) | [DOC] fix log directory paths | Critical | documentation |
| [HBASE-16499](https://issues.apache.org/jira/browse/HBASE-16499) | slow replication for small HBase clusters | Critical | Replication |
| [HBASE-17518](https://issues.apache.org/jira/browse/HBASE-17518) | HBase Reference Guide has a syntax error | Minor | documentation |
| [HBASE-20231](https://issues.apache.org/jira/browse/HBASE-20231) | Not able to delete column family from a row using RemoteHTable | Major | REST |
| [HBASE-20259](https://issues.apache.org/jira/browse/HBASE-20259) | Doc configs for in-memory-compaction and add detail to in-memory-compaction logging | Critical | . |
| [HBASE-17631](https://issues.apache.org/jira/browse/HBASE-17631) | Canary interval too low | Major | canary |
| [HBASE-20282](https://issues.apache.org/jira/browse/HBASE-20282) | Provide short name invocations for useful tools | Major | documentation, tooling |
| [HBASE-20314](https://issues.apache.org/jira/browse/HBASE-20314) | Precommit build for master branch fails because of surefire fork fails | Major | build |
| [HBASE-20261](https://issues.apache.org/jira/browse/HBASE-20261) | Table page (table.jsp) in Master UI does not show replicaIds for hbase meta table | Minor | UI |
| [HBASE-20229](https://issues.apache.org/jira/browse/HBASE-20229) | ConnectionImplementation.locateRegions() returns duplicated entries when region replication is on | Major | . |
| [HBASE-20308](https://issues.apache.org/jira/browse/HBASE-20308) | test Dockerfile needs to include git | Blocker | build, test |
| [HBASE-20130](https://issues.apache.org/jira/browse/HBASE-20130) | Use defaults (16020 & 16030) as base ports when the RS is bound to localhost | Critical | documentation |
| [HBASE-20111](https://issues.apache.org/jira/browse/HBASE-20111) | Able to split region explicitly even on shouldSplit return false from split policy | Critical | . |
| [HBASE-20292](https://issues.apache.org/jira/browse/HBASE-20292) | Wrong URLs in the descriptions for update\_all\_config and update\_config commands in shell | Trivial | shell |
| [HBASE-13300](https://issues.apache.org/jira/browse/HBASE-13300) | Fix casing in getTimeStamp() and setTimestamp() for Mutations | Critical | API |
| [HBASE-20237](https://issues.apache.org/jira/browse/HBASE-20237) | Put back getClosestRowBefore and throw UnknownProtocolException instead... for asynchbase client | Critical | compatibility, Operability |
| [HBASE-20090](https://issues.apache.org/jira/browse/HBASE-20090) | Properly handle Preconditions check failure in MemStoreFlusher$FlushHandler.run | Major | . |
| [HBASE-19639](https://issues.apache.org/jira/browse/HBASE-19639) | ITBLL can't go big because RegionTooBusyException... Above memstore limit | Blocker | . |
| [HBASE-20213](https://issues.apache.org/jira/browse/HBASE-20213) | [LOGGING] Aligning formatting and logging less (compactions, in-memory compactions) | Major | logging |
| [HBASE-20141](https://issues.apache.org/jira/browse/HBASE-20141) | Fix TooManyFiles exception when RefreshingChannels in FileIOEngine | Major | BucketCache |
| [HBASE-18216](https://issues.apache.org/jira/browse/HBASE-18216) | [AMv2] Workaround for HBASE-18152, corrupt procedure WAL | Major | proc-v2 |
| [HBASE-20200](https://issues.apache.org/jira/browse/HBASE-20200) | list\_procedures fails in shell | Major | shell |
| [HBASE-20185](https://issues.apache.org/jira/browse/HBASE-20185) | Fix ACL check for MasterRpcServices#execProcedure | Major | . |
| [HBASE-20146](https://issues.apache.org/jira/browse/HBASE-20146) | Regions are stuck while opening when WAL is disabled | Critical | wal |
| [HBASE-20187](https://issues.apache.org/jira/browse/HBASE-20187) | Shell startup fails with IncompatibleClassChangeError | Blocker | shell |
| [HBASE-20189](https://issues.apache.org/jira/browse/HBASE-20189) | Typo in Required Java Version error message while building HBase. | Trivial | build |
| [HBASE-20078](https://issues.apache.org/jira/browse/HBASE-20078) | MultiByteBuff : bug in reading primitives when individual buffers are too small | Major | . |
| [HBASE-19075](https://issues.apache.org/jira/browse/HBASE-19075) | Task tabs on master UI cause page scroll | Major | master |
| [HBASE-20104](https://issues.apache.org/jira/browse/HBASE-20104) | Fix infinite loop of RIT when creating table on a rsgroup that has no online servers | Major | rsgroup |
| [HBASE-19802](https://issues.apache.org/jira/browse/HBASE-19802) | Wrong usage messages on shell commands (grant/revoke namespace syntax) | Minor | shell |
| [HBASE-20153](https://issues.apache.org/jira/browse/HBASE-20153) | enable error-prone analysis in precommit | Major | community |
| [HBASE-20024](https://issues.apache.org/jira/browse/HBASE-20024) | TestMergeTableRegionsProcedure is STILL flakey | Major | . |
| [HBASE-19598](https://issues.apache.org/jira/browse/HBASE-19598) | Fix TestAssignmentManagerMetrics flaky test | Major | test |
| [HBASE-20162](https://issues.apache.org/jira/browse/HBASE-20162) | [nightly] depending on pipeline execution we sometimes refer to the wrong workspace | Critical | test |
| [HBASE-20164](https://issues.apache.org/jira/browse/HBASE-20164) | failed hadoopcheck should add footer link | Major | community |
| [HBASE-20160](https://issues.apache.org/jira/browse/HBASE-20160) | TestRestartCluster.testRetainAssignmentOnRestart uses the wrong condition to decide whether the assignment is finished | Major | Region Assignment |
| [HBASE-20114](https://issues.apache.org/jira/browse/HBASE-20114) | Fix IllegalFormatConversionException in rsgroup.jsp | Major | UI |
| [HBASE-20144](https://issues.apache.org/jira/browse/HBASE-20144) | The shutdown of master will hang if there are no live region server | Major | Recovery |
| [HBASE-19987](https://issues.apache.org/jira/browse/HBASE-19987) | update error-prone to 2.2.0 | Major | . |
| [HBASE-20108](https://issues.apache.org/jira/browse/HBASE-20108) | \`hbase zkcli\` falls into a non-interactive prompt after HBASE-15199 | Critical | Usability |
| [HBASE-19814](https://issues.apache.org/jira/browse/HBASE-19814) | Release hbase-2.0.0-beta-2; "rolling upgrade" release | Blocker | . |
| [HBASE-20134](https://issues.apache.org/jira/browse/HBASE-20134) | support scripts use hard-coded /tmp | Minor | website |
| [HBASE-20070](https://issues.apache.org/jira/browse/HBASE-20070) | website generation is failing | Blocker | website |
| [HBASE-19147](https://issues.apache.org/jira/browse/HBASE-19147) | All branch-2 unit tests pass | Blocker | test |
| [HBASE-20110](https://issues.apache.org/jira/browse/HBASE-20110) | Findbugs in zk and mr caused nightly #409 branch-2 to fail | Major | findbugs |
| [HBASE-19656](https://issues.apache.org/jira/browse/HBASE-19656) | Disable TestAssignmentManagerMetrics for beta-1 | Major | . |
| [HBASE-19863](https://issues.apache.org/jira/browse/HBASE-19863) | java.lang.IllegalStateException: isDelete failed when SingleColumnValueFilter is used | Major | Filters |
| [HBASE-20106](https://issues.apache.org/jira/browse/HBASE-20106) | API Compliance checker should fall back to specifying origin as remote repo | Major | API, community |
| [HBASE-20066](https://issues.apache.org/jira/browse/HBASE-20066) | Region sequence id may go backward after split or merge | Critical | . |
| [HBASE-20086](https://issues.apache.org/jira/browse/HBASE-20086) | PE randomSeekScan fails with ClassNotFoundException | Major | . |
| [HBASE-20074](https://issues.apache.org/jira/browse/HBASE-20074) | [FindBugs] Same code on both branches in CompactingMemStore#initMemStoreCompactor | Major | findbugs |
| [HBASE-19974](https://issues.apache.org/jira/browse/HBASE-19974) | Fix decommissioned servers cannot be removed by remove\_servers\_rsgroup methods | Major | rsgroup |
| [HBASE-20043](https://issues.apache.org/jira/browse/HBASE-20043) | ITBLL fails against hadoop3 | Major | integration tests |
| [HBASE-19583](https://issues.apache.org/jira/browse/HBASE-19583) | update RM list to remove EOM versions | Minor | community, documentation |
| [HBASE-19728](https://issues.apache.org/jira/browse/HBASE-19728) | Add lock to filesCompacting in all place. | Major | . |
| [HBASE-20061](https://issues.apache.org/jira/browse/HBASE-20061) | HStore synchronized member variable filesCompacting should be private | Major | regionserver |
| [HBASE-20062](https://issues.apache.org/jira/browse/HBASE-20062) | findbugs is not running on precommit checks | Blocker | community, test |
| [HBASE-20054](https://issues.apache.org/jira/browse/HBASE-20054) | Forward port HBASE-18282 ReplicationLogCleaner can delete WALs not yet replicated in case of KeeperException | Major | . |
| [HBASE-20049](https://issues.apache.org/jira/browse/HBASE-20049) | Region replicas of SPLIT and MERGED regions are kept in in-memory states until restarting master | Major | read replicas |
| [HBASE-19767](https://issues.apache.org/jira/browse/HBASE-19767) | Master web UI shows negative values for Remaining KVs | Major | . |
| [HBASE-19391](https://issues.apache.org/jira/browse/HBASE-19391) | Calling HRegion#initializeRegionInternals from a region replica can still re-create a region directory | Major | . |
| [HBASE-19166](https://issues.apache.org/jira/browse/HBASE-19166) | AsyncProtobufLogWriter persists ProtobufLogWriter as class name for backward compatibility | Blocker | wal |
| [HBASE-20027](https://issues.apache.org/jira/browse/HBASE-20027) | Add test TestClusterPortAssignment | Major | . |
| [HBASE-19953](https://issues.apache.org/jira/browse/HBASE-19953) | Avoid calling post\* hook when procedure fails | Critical | master, proc-v2 |
| [HBASE-20037](https://issues.apache.org/jira/browse/HBASE-20037) | Race when calling SequenceIdAccounting.resetHighest | Blocker | wal |
| [HBASE-19991](https://issues.apache.org/jira/browse/HBASE-19991) | lots of hbase-rest test failures against hadoop 3 | Major | REST, test |
| [HBASE-19920](https://issues.apache.org/jira/browse/HBASE-19920) | TokenUtil.obtainToken unnecessarily creates a local directory | Major | . |
| [HBASE-20017](https://issues.apache.org/jira/browse/HBASE-20017) | BufferedMutatorImpl submit the same mutation repeatedly | Blocker | Client |
| [HBASE-20032](https://issues.apache.org/jira/browse/HBASE-20032) | Receving multiple warnings for missing reporting.plugins.plugin.version | Minor | hbase |
| [HBASE-19954](https://issues.apache.org/jira/browse/HBASE-19954) | Separate TestBlockReorder into individual tests to avoid ShutdownHook suppression error against hadoop3 | Major | . |
| [HBASE-20023](https://issues.apache.org/jira/browse/HBASE-20023) | CompactionTool command line examples are incorrect | Trivial | hbase |
| [HBASE-14897](https://issues.apache.org/jira/browse/HBASE-14897) | TestTableLockManager.testReapAllTableLocks is flakey | Major | . |
| [HBASE-20020](https://issues.apache.org/jira/browse/HBASE-20020) | Make sure we throw DoNotRetryIOException when ConnectionImplementation is closed | Critical | Client |
| [HBASE-19980](https://issues.apache.org/jira/browse/HBASE-19980) | NullPointerException when restoring a snapshot after splitting a region | Major | snapshots |
| [HBASE-19998](https://issues.apache.org/jira/browse/HBASE-19998) | Flakey TestVisibilityLabelsWithDefaultVisLabelService | Major | flakey, test |
| [HBASE-19996](https://issues.apache.org/jira/browse/HBASE-19996) | Some nonce procs might not be cleaned up (follow up HBASE-19756) | Major | . |
| [HBASE-18282](https://issues.apache.org/jira/browse/HBASE-18282) | ReplicationLogCleaner can delete WALs not yet replicated in case of a KeeperException | Critical | Replication |
| [HBASE-19979](https://issues.apache.org/jira/browse/HBASE-19979) | ReplicationSyncUp tool may leak Zookeeper connection | Major | Replication |
| [HBASE-19876](https://issues.apache.org/jira/browse/HBASE-19876) | The exception happening in converting pb mutation to hbase.mutation messes up the CellScanner | Critical | . |
| [HBASE-19977](https://issues.apache.org/jira/browse/HBASE-19977) | FileMmapEngine allocation of byte buffers should be synchronized | Major | . |
| [HBASE-19986](https://issues.apache.org/jira/browse/HBASE-19986) | If HBaseTestClassRule timesout a test, thread dump. | Major | . |
| [HBASE-19968](https://issues.apache.org/jira/browse/HBASE-19968) | MapReduce test fails with NoClassDefFoundError against hadoop3 | Major | . |
| [HBASE-16060](https://issues.apache.org/jira/browse/HBASE-16060) | 1.x clients cannot access table state talking to 2.0 cluster | Blocker | . |
| [HBASE-19972](https://issues.apache.org/jira/browse/HBASE-19972) | Should rethrow the RetriesExhaustedWithDetailsException when failed to apply the batch in ReplicationSink | Critical | Replication |
| [HBASE-19964](https://issues.apache.org/jira/browse/HBASE-19964) | TestWriteHeavyIncrementObserver fails | Major | test |
| [HBASE-19966](https://issues.apache.org/jira/browse/HBASE-19966) | The WriteEntry for WALKey maybe null if we failed to call WAL.append | Major | wal |
| [HBASE-19937](https://issues.apache.org/jira/browse/HBASE-19937) | Ensure createRSGroupTable be called after ProcedureExecutor and LoadBalancer are initialized | Major | rsgroup |
| [HBASE-19929](https://issues.apache.org/jira/browse/HBASE-19929) | Call RS.stop on a session expired RS may hang | Major | wal |
| [HBASE-19900](https://issues.apache.org/jira/browse/HBASE-19900) | Region-level exception destroy the result of batch | Critical | . |
| [HBASE-19941](https://issues.apache.org/jira/browse/HBASE-19941) | Flaky TestCreateTableProcedure times out in nightly, needs to LargeTests | Major | test |
| [HBASE-19934](https://issues.apache.org/jira/browse/HBASE-19934) | HBaseSnapshotException when read replicas is enabled and online snapshot is taken after region splitting | Major | snapshots |
| [HBASE-19939](https://issues.apache.org/jira/browse/HBASE-19939) | TestSplitTableRegionProcedure#testSplitWithoutPONR() and testRecoveryAndDoubleExecution() are failing with NPE | Major | amv2 |
| [HBASE-19907](https://issues.apache.org/jira/browse/HBASE-19907) | TestMetaWithReplicas still flakey | Major | . |
| [HBASE-19907](https://issues.apache.org/jira/browse/HBASE-19907) | TestMetaWithReplicas still flakey | Major | . |
| [HBASE-19926](https://issues.apache.org/jira/browse/HBASE-19926) | Use a separated class to implement the WALActionListener for Replication | Major | Replication, wal |
| [HBASE-19703](https://issues.apache.org/jira/browse/HBASE-19703) | Functionality added as part of HBASE-12583 is not working after moving the split code to master | Major | . |
| [HBASE-19658](https://issues.apache.org/jira/browse/HBASE-19658) | Fix and reenable TestCompactingToCellFlatMapMemStore#testFlatteningToJumboCellChunkMap | Major | test |
| [HBASE-19905](https://issues.apache.org/jira/browse/HBASE-19905) | ReplicationSyncUp tool will not exit if a peer replication is disabled | Major | Replication |
| [HBASE-19726](https://issues.apache.org/jira/browse/HBASE-19726) | Failed to start HMaster due to infinite retrying on meta assign | Major | . |
| [HBASE-19919](https://issues.apache.org/jira/browse/HBASE-19919) | Tidying up logging | Major | . |
| [HBASE-19901](https://issues.apache.org/jira/browse/HBASE-19901) | Up yetus proclimit on nightlies | Major | . |
| [HBASE-19884](https://issues.apache.org/jira/browse/HBASE-19884) | BucketEntryGroup's equals, hashCode and compareTo methods are not consistent | Major | . |
| [HBASE-19906](https://issues.apache.org/jira/browse/HBASE-19906) | TestZooKeeper Timeout | Major | . |
| [HBASE-19892](https://issues.apache.org/jira/browse/HBASE-19892) | Checking 'patch attach' and yetus 0.7.0 and move to Yetus 0.7.0 | Major | . |
| [HBASE-19871](https://issues.apache.org/jira/browse/HBASE-19871) | delete.rb should require user to provide the column | Major | shell |
| [HBASE-19818](https://issues.apache.org/jira/browse/HBASE-19818) | Scan time limit not work if the filter always filter row key | Major | . |
| [HBASE-19756](https://issues.apache.org/jira/browse/HBASE-19756) | Master NPE during completed failed proc eviction | Major | . |
| [HBASE-17079](https://issues.apache.org/jira/browse/HBASE-17079) | HBase build fails on windows, hbase-archetype-builder is reason for failure | Major | build |
| [HBASE-19853](https://issues.apache.org/jira/browse/HBASE-19853) | duplicate slf4j declaration in mapreduce pom | Minor | dependencies |
| [HBASE-19838](https://issues.apache.org/jira/browse/HBASE-19838) | Can not shutdown backup master cleanly when it has already tried to become the active master | Critical | master |
| [HBASE-19780](https://issues.apache.org/jira/browse/HBASE-19780) | Change execution phase of checkstyle plugin back to default 'verify' | Major | . |
| [HBASE-19774](https://issues.apache.org/jira/browse/HBASE-19774) | incorrect behavior of locateRegionInMeta | Major | . |
| [HBASE-17513](https://issues.apache.org/jira/browse/HBASE-17513) | Thrift Server 1 uses different QOP settings than RPC and Thrift Server 2 and can easily be misconfigured so there is no encryption when the operator expects it. | Critical | documentation, security, Thrift, Usability |
| [HBASE-19836](https://issues.apache.org/jira/browse/HBASE-19836) | Fix TestZooKeeper.testLogSplittingAfterMasterRecoveryDueToZKExpiry | Major | test |
| [HBASE-19794](https://issues.apache.org/jira/browse/HBASE-19794) | TestZooKeeper hangs | Critical | . |
| [HBASE-19828](https://issues.apache.org/jira/browse/HBASE-19828) | Flakey TestRegionsOnMasterOptions.testRegionsOnAllServers | Major | . |
| [HBASE-19829](https://issues.apache.org/jira/browse/HBASE-19829) | hadoop-minicluster pulls zookeeper:test-jar:tests 3.4.6 | Minor | . |
| [HBASE-19163](https://issues.apache.org/jira/browse/HBASE-19163) | "Maximum lock count exceeded" from region server's batch processing | Major | regionserver |
| [HBASE-19757](https://issues.apache.org/jira/browse/HBASE-19757) | System table gets stuck after enabling region server group feature in secure cluster | Critical | . |
| [HBASE-19825](https://issues.apache.org/jira/browse/HBASE-19825) | Fix hadoop3 compat test failures | Major | pom |
| [HBASE-19822](https://issues.apache.org/jira/browse/HBASE-19822) | HFileCleaner threads stick around after shutdown stuck on queue#take | Major | . |
| [HBASE-19815](https://issues.apache.org/jira/browse/HBASE-19815) | Flakey TestAssignmentManager.testAssignWithRandExec | Major | flakey, test |
| [HBASE-19821](https://issues.apache.org/jira/browse/HBASE-19821) | TestCleanerChore#testOnConfigurationChange() requires at least 4 processors to get passed | Minor | test |
| [HBASE-19806](https://issues.apache.org/jira/browse/HBASE-19806) | Lower max versions for table column family of hbase:meta | Trivial | . |
| [HBASE-19812](https://issues.apache.org/jira/browse/HBASE-19812) | TestFlushSnapshotFromClient fails because of failing region.flush | Major | . |
| [HBASE-19816](https://issues.apache.org/jira/browse/HBASE-19816) | Replication sink list is not updated on UnknownHostException | Major | Replication |
| [HBASE-19784](https://issues.apache.org/jira/browse/HBASE-19784) | stop-hbase gives unfriendly message when local hbase isn't running | Minor | scripts |
| [HBASE-19196](https://issues.apache.org/jira/browse/HBASE-19196) | Release hbase-2.0.0-beta-1; the "Finish-line" release | Blocker | . |
| [HBASE-19808](https://issues.apache.org/jira/browse/HBASE-19808) | Reenable TestMultiParallel | Major | test |
| [HBASE-19792](https://issues.apache.org/jira/browse/HBASE-19792) | TestReplicationSmallTests.testDisableEnable fails | Major | test |
| [HBASE-19797](https://issues.apache.org/jira/browse/HBASE-19797) | Operator priority leads to wrong logic in ReplicationSourceWALReader | Major | . |
| [HBASE-19732](https://issues.apache.org/jira/browse/HBASE-19732) | Replica regions does not return back the MSLAB chunks to pool | Critical | . |
| [HBASE-19768](https://issues.apache.org/jira/browse/HBASE-19768) | RegionServer startup failing when DN is dead | Critical | . |
| [HBASE-19752](https://issues.apache.org/jira/browse/HBASE-19752) | RSGroupBasedLoadBalancer#getMisplacedRegions() should handle the case where rs group cannot be determined | Major | . |
| [HBASE-11409](https://issues.apache.org/jira/browse/HBASE-11409) | Add more flexibility for input directory structure to LoadIncrementalHFiles | Major | . |
| [HBASE-19694](https://issues.apache.org/jira/browse/HBASE-19694) | The initialization order for a fresh cluster is incorrect | Critical | . |
| [HBASE-19769](https://issues.apache.org/jira/browse/HBASE-19769) | IllegalAccessError on package-private Hadoop metrics2 classes in MapReduce jobs | Critical | mapreduce, metrics |
| [HBASE-19775](https://issues.apache.org/jira/browse/HBASE-19775) | hbase shell doesn't handle the exceptions that are wrapped in java.io.UncheckedIOException | Major | shell |
| [HBASE-19771](https://issues.apache.org/jira/browse/HBASE-19771) | restore\_snapshot shell command gives wrong namespace if the namespace doesn't exist | Minor | . |
| [HBASE-19773](https://issues.apache.org/jira/browse/HBASE-19773) | Adding javadoc around getting instance of RawCellBuilder | Minor | . |
| [HBASE-19685](https://issues.apache.org/jira/browse/HBASE-19685) | Fix TestFSErrorsExposed#testFullSystemBubblesFSErrors | Major | test |
| [HBASE-19755](https://issues.apache.org/jira/browse/HBASE-19755) | Error message for non-existent namespace is inaccurate | Minor | . |
| [HBASE-19749](https://issues.apache.org/jira/browse/HBASE-19749) | Revisit logic of UserScanQueryMatcher#mergeFilterResponse method | Major | . |
| [HBASE-19740](https://issues.apache.org/jira/browse/HBASE-19740) | Repeated error message for NamespaceExistException | Minor | . |
| [HBASE-19734](https://issues.apache.org/jira/browse/HBASE-19734) | IntegrationTestReplication broken w/ separate clusters | Critical | integration tests |
| [HBASE-19729](https://issues.apache.org/jira/browse/HBASE-19729) | UserScanQueryMatcher#mergeFilterResponse should return INCLUDE\_AND\_SEEK\_NEXT\_ROW when filterResponse is INCLUDE\_AND\_SEEK\_NEXT\_ROW | Major | . |
| [HBASE-19744](https://issues.apache.org/jira/browse/HBASE-19744) | Fix flakey TestZKLeaderManager | Major | test |
| [HBASE-19717](https://issues.apache.org/jira/browse/HBASE-19717) | IntegrationTestDDLMasterFailover is using outdated values for DataBlockEncoding | Major | integration tests |
| [HBASE-19424](https://issues.apache.org/jira/browse/HBASE-19424) | Metrics servlet throws NPE | Minor | . |
| [HBASE-19712](https://issues.apache.org/jira/browse/HBASE-19712) | Fix TestSnapshotQuotaObserverChore#testSnapshotSize | Major | test |
| [HBASE-19696](https://issues.apache.org/jira/browse/HBASE-19696) | Filter returning INCLUDE\_AND\_NEXT\_COL doesn't skip remaining versions when scan has explicit columns | Critical | . |
| [HBASE-19721](https://issues.apache.org/jira/browse/HBASE-19721) | Unnecessary stubbings detected in test class: TestReversedScannerCallable | Major | test |
| [HBASE-19714](https://issues.apache.org/jira/browse/HBASE-19714) | \`status 'detailed'\` invokes nonexistent "getRegionsInTransition" method on ClusterStatus | Critical | shell |
| [HBASE-19709](https://issues.apache.org/jira/browse/HBASE-19709) | Guard against a ThreadPool size of 0 in CleanerChore | Critical | . |
| [HBASE-19383](https://issues.apache.org/jira/browse/HBASE-19383) | [1.2] java.lang.AssertionError: expected:\<2\> but was:\<1\> at org.apache.hadoop.hbase.TestChoreService.testTriggerNowFailsWhenNotScheduled(TestChoreService.java:707) | Major | test |
| [HBASE-19688](https://issues.apache.org/jira/browse/HBASE-19688) | TimeToLiveProcedureWALCleaner should extends BaseLogCleanerDelegate | Minor | . |
| [HBASE-18452](https://issues.apache.org/jira/browse/HBASE-18452) | VerifyReplication by Snapshot should cache HDFS token before submit job for kerberos env. | Major | . |
| [HBASE-19588](https://issues.apache.org/jira/browse/HBASE-19588) | Additional jar dependencies needed for mapreduce PerformanceEvaluation | Minor | test |
| [HBASE-19490](https://issues.apache.org/jira/browse/HBASE-19490) | Rare failure in TestRateLimiter | Major | test |
| [HBASE-19691](https://issues.apache.org/jira/browse/HBASE-19691) | Do not require ADMIN permission for obtaining ClusterStatus | Critical | . |
| [HBASE-19392](https://issues.apache.org/jira/browse/HBASE-19392) | TestReplicaWithCluster#testReplicaGetWithPrimaryAndMetaDown failure in master | Minor | regionserver |
| [HBASE-19654](https://issues.apache.org/jira/browse/HBASE-19654) | Remove misleading and chatty debug message in ReplicationLogCleaner | Major | . |
| [HBASE-19666](https://issues.apache.org/jira/browse/HBASE-19666) | TestDefaultCompactSelection test failed | Critical | test |
| [HBASE-19671](https://issues.apache.org/jira/browse/HBASE-19671) | Fix TestMultiParallel#testActiveThreadsCount | Minor | test |
| [HBASE-19672](https://issues.apache.org/jira/browse/HBASE-19672) | Correct comments for default values of major compaction in SortedCompactionPolicy#getNextMajorCompactTime() | Minor | . |
| [HBASE-19643](https://issues.apache.org/jira/browse/HBASE-19643) | Need to update cache location when get error in AsyncBatchRpcRetryingCaller | Major | . |
| [HBASE-19619](https://issues.apache.org/jira/browse/HBASE-19619) | Modify replication\_admin.rb to use ReplicationPeerConfigBuilder | Critical | . |
| [HBASE-19624](https://issues.apache.org/jira/browse/HBASE-19624) | TestIOFencing hangs | Major | . |
| [HBASE-19496](https://issues.apache.org/jira/browse/HBASE-19496) | Reusing the ByteBuffer in rpc layer corrupt the ServerLoad and RegionLoad | Blocker | . |
| [HBASE-19457](https://issues.apache.org/jira/browse/HBASE-19457) | Debugging flaky TestTruncateTableProcedure#testRecoveryAndDoubleExecutionPreserveSplits | Major | . |
| [HBASE-19608](https://issues.apache.org/jira/browse/HBASE-19608) | Race in MasterRpcServices.getProcedureResult | Major | proc-v2 |
| [HBASE-19593](https://issues.apache.org/jira/browse/HBASE-19593) | Possible NPE if wal is closed during waledit append. | Major | . |
| [HBASE-19589](https://issues.apache.org/jira/browse/HBASE-19589) | New regions should always be added with state CLOSED (followup of HBASE-19530) | Major | . |
| [HBASE-17248](https://issues.apache.org/jira/browse/HBASE-17248) | SimpleRegionNormalizer javadoc correction | Trivial | master |
| [HBASE-19148](https://issues.apache.org/jira/browse/HBASE-19148) | Reevaluate default values of configurations | Blocker | defaults |
| [HBASE-19578](https://issues.apache.org/jira/browse/HBASE-19578) | MasterProcWALs cleaning is incorrect | Critical | amv2 |
| [HBASE-19559](https://issues.apache.org/jira/browse/HBASE-19559) | Fix TestLogRolling.testLogRollOnDatanodeDeath | Major | test, wal |
| [HBASE-19218](https://issues.apache.org/jira/browse/HBASE-19218) | Master stuck thinking hbase:namespace is assigned after restart preventing intialization | Critical | . |
| [HBASE-19542](https://issues.apache.org/jira/browse/HBASE-19542) | fix TestSafemodeBringsDownMaster | Major | . |
| [HBASE-19563](https://issues.apache.org/jira/browse/HBASE-19563) | A few hbase-procedure classes missing @InterfaceAudience annotation | Minor | proc-v2 |
| [HBASE-19561](https://issues.apache.org/jira/browse/HBASE-19561) | maxCacheSize in CacheEvictionStats can't be accumulated repeatedly When dealing with each region | Major | . |
| [HBASE-19558](https://issues.apache.org/jira/browse/HBASE-19558) | TestRegionsOnMasterOptions hack so it works reliablly | Major | test |
| [HBASE-19555](https://issues.apache.org/jira/browse/HBASE-19555) | TestSplitTransactionOnCluster is flaky | Major | test |
| [HBASE-19532](https://issues.apache.org/jira/browse/HBASE-19532) | AssignProcedure#COMPARATOR may produce incorrect sort order | Critical | . |
| [HBASE-19549](https://issues.apache.org/jira/browse/HBASE-19549) | Change path comparison in CommonFSUtils | Major | . |
| [HBASE-19546](https://issues.apache.org/jira/browse/HBASE-19546) | TestMasterReplication.testCyclicReplication2 uses wrong assertion | Major | Replication, test |
| [HBASE-19522](https://issues.apache.org/jira/browse/HBASE-19522) | The complete order may be wrong in AsyncBufferedMutatorImpl | Major | . |
| [HBASE-19530](https://issues.apache.org/jira/browse/HBASE-19530) | New regions should always be added with state CLOSED | Major | . |
| [HBASE-19509](https://issues.apache.org/jira/browse/HBASE-19509) | RSGroupAdminEndpoint#preCreateTable triggers TableNotFoundException | Minor | . |
| [HBASE-18352](https://issues.apache.org/jira/browse/HBASE-18352) | Enable TestMasterOperationsForRegionReplicas#testCreateTableWithMultipleReplicas disabled by Proc-V2 AM in HBASE-14614 | Major | test |
| [HBASE-18838](https://issues.apache.org/jira/browse/HBASE-18838) | shaded artifacts are incorrect when built against hadoop 3 | Critical | Client |
| [HBASE-18946](https://issues.apache.org/jira/browse/HBASE-18946) | Stochastic load balancer assigns replica regions to the same RS | Major | . |
| [HBASE-19516](https://issues.apache.org/jira/browse/HBASE-19516) | IntegrationTestBulkLoad and IntegrationTestImportTsv run into 'java.lang.RuntimeException: DistributedHBaseCluster@1bb564e2 not an instance of MiniHBaseCluster' | Major | . |
| [HBASE-19513](https://issues.apache.org/jira/browse/HBASE-19513) | Fix the wrapped AsyncFSOutput implementation | Major | wal |
| [HBASE-19511](https://issues.apache.org/jira/browse/HBASE-19511) | Splits causes blocks to be cached again and so such blocks cannot be evicted from bucket cache | Critical | BucketCache |
| [HBASE-19510](https://issues.apache.org/jira/browse/HBASE-19510) | TestDistributedLogSplitting is flakey for AsyncFSWAL | Critical | Recovery, test |
| [HBASE-19287](https://issues.apache.org/jira/browse/HBASE-19287) | master hangs forever if RecoverMeta send assign meta region request to target server fail | Major | proc-v2 |
| [HBASE-19503](https://issues.apache.org/jira/browse/HBASE-19503) | Fix TestWALOpenAfterDNRollingStart for AsyncFSWAL | Major | Replication, wal |
| [HBASE-19434](https://issues.apache.org/jira/browse/HBASE-19434) | create\_namespace command for existing namespace does not throw useful error message | Minor | . |
| [HBASE-19484](https://issues.apache.org/jira/browse/HBASE-19484) | The value array written by ExtendedCell#write is out of bounds | Blocker | . |
| [HBASE-19508](https://issues.apache.org/jira/browse/HBASE-19508) | ReadOnlyConfiguration throws exception if any Configuration in current context calls addDefautlResource | Major | conf |
| [HBASE-19456](https://issues.apache.org/jira/browse/HBASE-19456) | RegionMover's region server hostname option is no longer case insensitive | Major | tooling |
| [HBASE-19495](https://issues.apache.org/jira/browse/HBASE-19495) | Fix failed ut TestShell | Major | . |
| [HBASE-19394](https://issues.apache.org/jira/browse/HBASE-19394) | Support multi-homing env for the publication of RS status with multicast (hbase.status.published) | Major | Client, master |
| [HBASE-19493](https://issues.apache.org/jira/browse/HBASE-19493) | Make TestWALMonotonicallyIncreasingSeqId also work with AsyncFSWAL | Major | test |
| [HBASE-19371](https://issues.apache.org/jira/browse/HBASE-19371) | Running WALPerformanceEvaluation against asyncfswal throws exceptions | Major | . |
| [HBASE-19134](https://issues.apache.org/jira/browse/HBASE-19134) | Make WALKey an Interface; expose Read-Only version to CPs | Major | Coprocessors, wal |
| [HBASE-19461](https://issues.apache.org/jira/browse/HBASE-19461) | TestRSGroups is broke | Major | test |
| [HBASE-19433](https://issues.apache.org/jira/browse/HBASE-19433) | ChangeSplitPolicyAction modifies an immutable HTableDescriptor | Critical | integration tests |
| [HBASE-19454](https://issues.apache.org/jira/browse/HBASE-19454) | Debugging TestDistributedLogSplitting#testThreeRSAbort | Major | . |
| [HBASE-19349](https://issues.apache.org/jira/browse/HBASE-19349) | Introduce wrong version depencency of servlet-api jar | Critical | . |
| [HBASE-19435](https://issues.apache.org/jira/browse/HBASE-19435) | Reopen Files for ClosedChannelException in BucketCache | Major | BucketCache |
| [HBASE-12444](https://issues.apache.org/jira/browse/HBASE-12444) | Total number of requests overflow because it's int | Minor | hbck, master, regionserver |
| [HBASE-19447](https://issues.apache.org/jira/browse/HBASE-19447) | INFO level logging of GetClusterStatus from HMaster is too chatty | Major | . |
| [HBASE-19417](https://issues.apache.org/jira/browse/HBASE-19417) | Remove boolean return value from postBulkLoadHFile hook | Major | . |
| [HBASE-19445](https://issues.apache.org/jira/browse/HBASE-19445) | PerformanceEvaluation NPE processing split policy option | Trivial | . |
| [HBASE-19023](https://issues.apache.org/jira/browse/HBASE-19023) | Usage for rowcounter in refguide is out of sync with code | Major | . |
| [HBASE-19422](https://issues.apache.org/jira/browse/HBASE-19422) | using hadoop-profile property leads to confusing failures | Major | . |
| [HBASE-19384](https://issues.apache.org/jira/browse/HBASE-19384) | Results returned by preAppend hook in a coprocessor are replaced with null from other coprocessor even on bypass | Critical | Coprocessors |
| [HBASE-19431](https://issues.apache.org/jira/browse/HBASE-19431) | The tag array written by IndividualBytesFieldCell#write is out of bounds | Critical | . |
| [HBASE-18942](https://issues.apache.org/jira/browse/HBASE-18942) | hbase-hadoop2-compat module ignores hadoop-3 profile | Major | . |
| [HBASE-19056](https://issues.apache.org/jira/browse/HBASE-19056) | TestCompactionInDeadRegionServer is top of the flakies charts! | Major | test |
| [HBASE-19339](https://issues.apache.org/jira/browse/HBASE-19339) | Eager policy results in the negative size of memstore | Critical | . |
| [HBASE-16239](https://issues.apache.org/jira/browse/HBASE-16239) | Better logging for RPC related exceptions | Major | . |
| [HBASE-19396](https://issues.apache.org/jira/browse/HBASE-19396) | Fix flaky test TestHTableMultiplexerFlushCache | Minor | test |
| [HBASE-19406](https://issues.apache.org/jira/browse/HBASE-19406) | Fix CompactionRequest equals and hashCode | Major | . |
| [HBASE-19285](https://issues.apache.org/jira/browse/HBASE-19285) | Add per-table latency histograms | Critical | metrics |
| [HBASE-19390](https://issues.apache.org/jira/browse/HBASE-19390) | Revert to older version of Jetty 9.3 | Major | . |
| [HBASE-19385](https://issues.apache.org/jira/browse/HBASE-19385) | [1.3] TestReplicator failed 1.3 nightly | Major | test |
| [HBASE-19350](https://issues.apache.org/jira/browse/HBASE-19350) | TestMetaWithReplicas is flaky | Major | . |
| [HBASE-19388](https://issues.apache.org/jira/browse/HBASE-19388) | Incorrect value is being set for Compaction Pressure in RegionLoadStats object inside HRegion class | Minor | regionserver |
| [HBASE-19386](https://issues.apache.org/jira/browse/HBASE-19386) | HBase UnsafeAvailChecker returns false on Arm64 | Minor | . |
| [HBASE-19363](https://issues.apache.org/jira/browse/HBASE-19363) | Tests under TestCheckAndMutate are identical | Minor | . |
| [HBASE-19035](https://issues.apache.org/jira/browse/HBASE-19035) | Miss metrics when coprocessor use region scanner to read data | Major | . |
| [HBASE-19351](https://issues.apache.org/jira/browse/HBASE-19351) | Deprecated is missing in Table implementations | Minor | . |
| [HBASE-19355](https://issues.apache.org/jira/browse/HBASE-19355) | Missing dependency on hbase-zookeeper module causes CopyTable to fail | Major | . |
| [HBASE-19335](https://issues.apache.org/jira/browse/HBASE-19335) | Fix waitUntilAllRegionsAssigned | Major | . |
| [HBASE-19318](https://issues.apache.org/jira/browse/HBASE-19318) | MasterRpcServices#getSecurityCapabilities explicitly checks for the HBase AccessController implementation | Critical | master, security |
| [HBASE-19319](https://issues.apache.org/jira/browse/HBASE-19319) | Fix bug in synchronizing over ProcedureEvent | Major | . |
| [HBASE-19325](https://issues.apache.org/jira/browse/HBASE-19325) | Pass a list of server name to postClearDeadServers | Major | . |
| [HBASE-19337](https://issues.apache.org/jira/browse/HBASE-19337) | AsyncMetaTableAccessor may hang when call ScanController.terminate many times | Major | . |
| [HBASE-19332](https://issues.apache.org/jira/browse/HBASE-19332) | DumpReplicationQueues misreports total WAL size | Trivial | Replication |
| [HBASE-19310](https://issues.apache.org/jira/browse/HBASE-19310) | Verify IntegrationTests don't rely on Rules outside of JUnit context | Critical | integration tests |
| [HBASE-19317](https://issues.apache.org/jira/browse/HBASE-19317) | Increase "yarn.nodemanager.disk-health-checker.max-disk-utilization-per-disk-percentage" to avoid host-related failures on MiniMRCluster | Major | integration tests, test |
| [HBASE-19330](https://issues.apache.org/jira/browse/HBASE-19330) | Remove duplicated dependency from hbase-rest | Trivial | dependencies |
| [HBASE-19321](https://issues.apache.org/jira/browse/HBASE-19321) | ZKAsyncRegistry ctor would hang when zookeeper cluster is not available | Major | . |
| [HBASE-19315](https://issues.apache.org/jira/browse/HBASE-19315) | Incorrect snapshot version is used for 2.0.0-beta-1 | Minor | . |
| [HBASE-19304](https://issues.apache.org/jira/browse/HBASE-19304) | KEEP\_DELETED\_CELLS should ignore case | Blocker | regionserver |
| [HBASE-19260](https://issues.apache.org/jira/browse/HBASE-19260) | Add lock back to avoid parallel accessing meta to locate region | Major | . |
| [HBASE-19181](https://issues.apache.org/jira/browse/HBASE-19181) | LogRollBackupSubprocedure will fail if we use AsyncFSWAL instead of FSHLog | Major | backup&restore |
| [HBASE-18356](https://issues.apache.org/jira/browse/HBASE-18356) | Enable TestFavoredStochasticBalancerPickers#testPickers that was disabled by Proc-V2 AM in HBASE-14614 | Major | test |
| [HBASE-18357](https://issues.apache.org/jira/browse/HBASE-18357) | Enable disabled tests in TestHCM that were disabled by Proc-V2 AM in HBASE-14614 | Major | test |
| [HBASE-19223](https://issues.apache.org/jira/browse/HBASE-19223) | Remove references to Date Tiered compaction from branch-1.2 and branch-1.1 ref guide | Critical | Compaction, documentation |
| [HBASE-19255](https://issues.apache.org/jira/browse/HBASE-19255) | PerformanceEvaluation class not found when run PE test | Major | . |
| [HBASE-19245](https://issues.apache.org/jira/browse/HBASE-19245) | MultiTableInputFormatBase#getSplits creates a Connection per Table | Minor | mapreduce |
| [HBASE-12091](https://issues.apache.org/jira/browse/HBASE-12091) | Optionally ignore edits for dropped tables for replication. | Major | . |
| [HBASE-19210](https://issues.apache.org/jira/browse/HBASE-19210) | TestNamespacesInstanceResource fails | Major | . |
| [HBASE-19249](https://issues.apache.org/jira/browse/HBASE-19249) | test for "hbase antipatterns" should check \_count\_ of occurance rather than text of | Critical | build |
| [HBASE-19240](https://issues.apache.org/jira/browse/HBASE-19240) | Fix error-prone errors, part four? | Major | . |
| [HBASE-19215](https://issues.apache.org/jira/browse/HBASE-19215) | Incorrect exception handling on the client causes incorrect call timeouts and byte buffer allocations on the server | Major | rpc |
| [HBASE-19250](https://issues.apache.org/jira/browse/HBASE-19250) | TestClientClusterStatus is flaky | Trivial | . |
| [HBASE-19246](https://issues.apache.org/jira/browse/HBASE-19246) | Trivial fix in findHangingTests.py | Trivial | . |
| [HBASE-19244](https://issues.apache.org/jira/browse/HBASE-19244) | Fix simple typos in HBASE-15518 descriptions | Trivial | . |
| [HBASE-19089](https://issues.apache.org/jira/browse/HBASE-19089) | Fix the list of included moduleSets in src and binary tars | Major | build |
| [HBASE-19229](https://issues.apache.org/jira/browse/HBASE-19229) | Nightly script to check source artifact should not do a destructive git operation without opt-in | Critical | build |
| [HBASE-19199](https://issues.apache.org/jira/browse/HBASE-19199) | RatioBasedCompactionPolicy#shouldPerformMajorCompaction() always return true when only one file needs to compact | Major | . |
| [HBASE-19195](https://issues.apache.org/jira/browse/HBASE-19195) | More error-prone fixes | Major | . |
| [HBASE-19165](https://issues.apache.org/jira/browse/HBASE-19165) | TODO Handle stuck in transition: rit=OPENING, location=ve0538.... | Critical | migration |
| [HBASE-19184](https://issues.apache.org/jira/browse/HBASE-19184) | clean up nightly source artifact test to match expectations from switch to git-archive | Critical | build |
| [HBASE-19211](https://issues.apache.org/jira/browse/HBASE-19211) | B&R: update configuration string in BackupRestoreConstants | Minor | . |
| [HBASE-19194](https://issues.apache.org/jira/browse/HBASE-19194) | TestRSGroupsBase has some always false checks | Blocker | rsgroup, test |
| [HBASE-19088](https://issues.apache.org/jira/browse/HBASE-19088) | move\_tables\_rsgroup will throw an exception when the table is disabled | Major | rsgroup |
| [HBASE-19198](https://issues.apache.org/jira/browse/HBASE-19198) | TestIPv6NIOServerSocketChannel fails; unable to bind | Minor | test |
| [HBASE-19102](https://issues.apache.org/jira/browse/HBASE-19102) | TestZooKeeperMainServer fails with KeeperException$ConnectionLossException | Major | . |
| [HBASE-18844](https://issues.apache.org/jira/browse/HBASE-18844) | Release hbase-2.0.0-alpha-4; Theme "Coprocessor API Cleanup" | Major | . |
| [HBASE-19111](https://issues.apache.org/jira/browse/HBASE-19111) | Add missing CellUtil#isPut(Cell) methods | Critical | Client |
| [HBASE-19160](https://issues.apache.org/jira/browse/HBASE-19160) | Re-expose CellComparator | Critical | . |
| [HBASE-19185](https://issues.apache.org/jira/browse/HBASE-19185) | ClassNotFoundException: com.fasterxml.jackson.\* | Critical | mapreduce |
| [HBASE-18983](https://issues.apache.org/jira/browse/HBASE-18983) | Upgrade to latest error-prone | Major | build |
| [HBASE-19178](https://issues.apache.org/jira/browse/HBASE-19178) | table.rb use undefined method 'getType' for Cell interface | Trivial | . |
| [HBASE-19117](https://issues.apache.org/jira/browse/HBASE-19117) | Avoid NPE occurring while active master dies | Minor | . |
| [HBASE-19173](https://issues.apache.org/jira/browse/HBASE-19173) | Configure IntegrationTestRSGroup automatically for minicluster mode | Minor | rsgroup, test |
| [HBASE-19144](https://issues.apache.org/jira/browse/HBASE-19144) | [RSgroups] Retry assignments in FAILED\_OPEN state when servers (re)join the cluster | Major | rsgroup |
| [HBASE-19124](https://issues.apache.org/jira/browse/HBASE-19124) | Move HBase-Nightly source artifact creation test from JenkinsFile to a script in dev-support | Major | test |
| [HBASE-19156](https://issues.apache.org/jira/browse/HBASE-19156) | Duplicative regions\_per\_server options on LoadTestTool | Trivial | test |
| [HBASE-19118](https://issues.apache.org/jira/browse/HBASE-19118) | Use SaslUtil to set Sasl.QOP in 'Thrift' | Major | Thrift |
| [HBASE-19150](https://issues.apache.org/jira/browse/HBASE-19150) | TestSnapshotWithAcl is flaky | Minor | . |
| [HBASE-19120](https://issues.apache.org/jira/browse/HBASE-19120) | IllegalArgumentException from ZNodeClearer when master shuts down | Major | . |
| [HBASE-19065](https://issues.apache.org/jira/browse/HBASE-19065) | HRegion#bulkLoadHFiles() should wait for concurrent Region#flush() to finish | Major | . |
| [HBASE-19100](https://issues.apache.org/jira/browse/HBASE-19100) | Missing break in catch block of InterruptedException in HRegion#waitForFlushesAndCompactions | Major | . |
| [HBASE-19137](https://issues.apache.org/jira/browse/HBASE-19137) | Nightly test should make junit reports optional rather than attempt archive after reporting. | Critical | build |
| [HBASE-19135](https://issues.apache.org/jira/browse/HBASE-19135) | TestWeakObjectPool time out | Major | . |
| [HBASE-19138](https://issues.apache.org/jira/browse/HBASE-19138) | Rare failure in TestLruBlockCache | Trivial | test |
| [HBASE-19030](https://issues.apache.org/jira/browse/HBASE-19030) | nightly runs should attempt to log test results after archiving | Critical | test |
| [HBASE-19130](https://issues.apache.org/jira/browse/HBASE-19130) | Typo in HStore.initializeRegionInternals for replaying wal | Critical | Recovery |
| [HBASE-19087](https://issues.apache.org/jira/browse/HBASE-19087) | Log an Optional's value/null instead of Optional[value]/Optional.empty. | Major | . |
| [HBASE-19129](https://issues.apache.org/jira/browse/HBASE-19129) | TestChoreService is flaky (branch-1 / branch-1.4) | Trivial | . |
| [HBASE-19119](https://issues.apache.org/jira/browse/HBASE-19119) | hbase-http shouldn't have a native profile | Blocker | build |
| [HBASE-18438](https://issues.apache.org/jira/browse/HBASE-18438) | Precommit doesn't warn about unused imports | Critical | build |
| [HBASE-18922](https://issues.apache.org/jira/browse/HBASE-18922) | Fix all dead links in our HBase book | Major | documentation |
| [HBASE-19094](https://issues.apache.org/jira/browse/HBASE-19094) | NPE in RSGroupStartupWorker.waitForGroupTableOnline during master startup | Minor | . |
| [HBASE-13346](https://issues.apache.org/jira/browse/HBASE-13346) | Clean up Filter package for post 1.0 s/KeyValue/Cell/g | Critical | API, Filters |
| [HBASE-19098](https://issues.apache.org/jira/browse/HBASE-19098) | Python based compatiblity checker fails if git repo does not have a remote named 'origin' | Critical | tooling |
| [HBASE-19077](https://issues.apache.org/jira/browse/HBASE-19077) | Have Region\*CoprocessorEnvironment provide an ImmutableOnlineRegions | Critical | Coprocessors |
| [HBASE-19073](https://issues.apache.org/jira/browse/HBASE-19073) | Cleanup CoordinatedStateManager | Major | . |
| [HBASE-19054](https://issues.apache.org/jira/browse/HBASE-19054) | Switch precommit docker image to one based on maven images | Major | build, community |
| [HBASE-19018](https://issues.apache.org/jira/browse/HBASE-19018) | Use of hadoop internals that require bouncycastle should declare bouncycastle dependency | Critical | dependencies, test |
| [HBASE-19021](https://issues.apache.org/jira/browse/HBASE-19021) | Restore a few important missing logics for balancer in 2.0 | Critical | . |
| [HBASE-19066](https://issues.apache.org/jira/browse/HBASE-19066) | Correct the directory of openjdk-8 for jenkins | Major | build |
| [HBASE-16290](https://issues.apache.org/jira/browse/HBASE-16290) | Dump summary of callQueue content; can help debugging | Major | Operability |
| [HBASE-18846](https://issues.apache.org/jira/browse/HBASE-18846) | Accommodate the hbase-indexer/lily/SEP consumer deploy-type | Major | . |
| [HBASE-19072](https://issues.apache.org/jira/browse/HBASE-19072) | Missing break in catch block of InterruptedException in HRegion#waitForFlushes() | Major | . |
| [HBASE-19058](https://issues.apache.org/jira/browse/HBASE-19058) | The wget isn't installed in building docker image | Major | build |
| [HBASE-19039](https://issues.apache.org/jira/browse/HBASE-19039) | refactor shadedjars test to only run on java changes. | Major | build |
| [HBASE-19060](https://issues.apache.org/jira/browse/HBASE-19060) | "Hadoop check" test is running all the time instead of just when changes to java | Critical | build |
| [HBASE-19061](https://issues.apache.org/jira/browse/HBASE-19061) | enforcer NPE on hbase-shaded-invariants | Blocker | build |
| [HBASE-19014](https://issues.apache.org/jira/browse/HBASE-19014) | surefire fails; When writing xml report stdout/stderr ... No such file or directory | Major | . |
| [HBASE-19042](https://issues.apache.org/jira/browse/HBASE-19042) | Oracle Java 8u144 downloader broken in precommit check | Blocker | build |
| [HBASE-19020](https://issues.apache.org/jira/browse/HBASE-19020) | TestXmlParsing exception checking relies on a particular xml implementation without declaring it. | Major | dependencies, REST |
| [HBASE-19038](https://issues.apache.org/jira/browse/HBASE-19038) | precommit mvn install should run from root on patch | Major | build |
| [HBASE-19032](https://issues.apache.org/jira/browse/HBASE-19032) | Set Content-Type header for patches uploaded by submit-patch.py | Major | . |
| [HBASE-18350](https://issues.apache.org/jira/browse/HBASE-18350) | RSGroups are broken under AMv2 | Blocker | rsgroup |
| [HBASE-18990](https://issues.apache.org/jira/browse/HBASE-18990) | ServerLoad doesn't override #equals which leads to #equals in ClusterStatus always false | Trivial | . |
| [HBASE-19017](https://issues.apache.org/jira/browse/HBASE-19017) | [AMv2] EnableTableProcedure is not retaining the assignments | Major | Region Assignment |
| [HBASE-19016](https://issues.apache.org/jira/browse/HBASE-19016) | Coordinate storage policy property name for table schema and bulkload | Minor | . |
| [HBASE-18997](https://issues.apache.org/jira/browse/HBASE-18997) | Remove the redundant methods in RegionInfo | Major | . |
| [HBASE-18355](https://issues.apache.org/jira/browse/HBASE-18355) | Enable export snapshot tests that were disabled by Proc-V2 AM in HBASE-14614 | Major | test |
| [HBASE-18505](https://issues.apache.org/jira/browse/HBASE-18505) | Our build/yetus personality will run tests on individual modules and then on all (i.e. 'root'). Should do one or other | Critical | build |
| [HBASE-18998](https://issues.apache.org/jira/browse/HBASE-18998) | processor.getRowsToLock() always assumes there is some row being locked | Major | . |
| [HBASE-18992](https://issues.apache.org/jira/browse/HBASE-18992) | Comparators passed to the Memstore's flattened segments seems to be wrong | Major | . |
| [HBASE-17590](https://issues.apache.org/jira/browse/HBASE-17590) | Drop cache hint should work for StoreFile write path | Major | . |
| [HBASE-18975](https://issues.apache.org/jira/browse/HBASE-18975) | Fix backup / restore hadoop3 incompatibility | Blocker | . |
| [HBASE-18904](https://issues.apache.org/jira/browse/HBASE-18904) | Missing break in NEXT\_ROW case of FilterList#mergeReturnCodeForOrOperator() | Minor | . |
| [HBASE-18934](https://issues.apache.org/jira/browse/HBASE-18934) | precommit on branch-1 isn't supposed to run against hadoop 3 | Critical | test |
| [HBASE-18973](https://issues.apache.org/jira/browse/HBASE-18973) | clean up maven warnings about pom well-formedness for master/branch-2 | Minor | build |
| [HBASE-18958](https://issues.apache.org/jira/browse/HBASE-18958) | Remove the IS annotation from SpaceLimitingException | Trivial | . |
| [HBASE-18921](https://issues.apache.org/jira/browse/HBASE-18921) | Result.current() throws ArrayIndexOutOfBoundsException after calling advance() | Minor | . |
| [HBASE-18940](https://issues.apache.org/jira/browse/HBASE-18940) | branch-2 (and probably others) fail check of generated source artifact | Critical | build |
| [HBASE-18874](https://issues.apache.org/jira/browse/HBASE-18874) | HMaster abort message will be skipped if Throwable is passed null | Minor | . |
| [HBASE-18941](https://issues.apache.org/jira/browse/HBASE-18941) | Confusing logging error around rerun of restore on an existing table. | Minor | . |
| [HBASE-18932](https://issues.apache.org/jira/browse/HBASE-18932) | Backups masking exception in a scenario and though it fails , it shows success message. | Major | . |
| [HBASE-18606](https://issues.apache.org/jira/browse/HBASE-18606) | Tests in hbase-spark module fail with UnsatisfiedLinkError | Critical | spark, test |
| [HBASE-18928](https://issues.apache.org/jira/browse/HBASE-18928) | Backup delete command shows wrong number of deletes requested | Minor | . |
| [HBASE-18490](https://issues.apache.org/jira/browse/HBASE-18490) | Modifying a table descriptor to enable replicas does not create replica regions | Major | Region Assignment |
| [HBASE-18913](https://issues.apache.org/jira/browse/HBASE-18913) | TestShell fails because NoMethodError: undefined method parseColumn | Major | shell |
| [HBASE-18894](https://issues.apache.org/jira/browse/HBASE-18894) | null pointer exception in list\_regions in shell command | Major | . |
| [HBASE-17441](https://issues.apache.org/jira/browse/HBASE-17441) | precommit test "hadoopcheck" not properly testing Hadoop 3 profile | Blocker | build |
| [HBASE-18845](https://issues.apache.org/jira/browse/HBASE-18845) | TestReplicationSmallTests fails after HBASE-14004 | Major | Replication |
| [HBASE-18887](https://issues.apache.org/jira/browse/HBASE-18887) | After full backup passed on hdfs root and incremental failed, full backup cannot be cleaned | Major | . |
| [HBASE-18888](https://issues.apache.org/jira/browse/HBASE-18888) | StealJobQueue should call super() to init the PriorityBlockingQueue | Major | . |
| [HBASE-18885](https://issues.apache.org/jira/browse/HBASE-18885) | HFileOutputFormat2 hardcodes default FileOutputCommitter | Major | mapreduce |
| [HBASE-18880](https://issues.apache.org/jira/browse/HBASE-18880) | Failed to start rest server if the value of hbase.rest.threads.max is too small. | Critical | REST |
| [HBASE-18762](https://issues.apache.org/jira/browse/HBASE-18762) | Canary sink type cast error | Major | . |
| [HBASE-18830](https://issues.apache.org/jira/browse/HBASE-18830) | TestCanaryTool does not check Canary monitor's error code | Major | . |
| [HBASE-18876](https://issues.apache.org/jira/browse/HBASE-18876) | Backup create command fails to take queue parameter as option | Major | . |
| [HBASE-18796](https://issues.apache.org/jira/browse/HBASE-18796) | Admin#isTableAvailable returns incorrect result before daughter regions are opened | Major | . |
| [HBASE-18866](https://issues.apache.org/jira/browse/HBASE-18866) | clean up warnings about proto syntax | Minor | Protobufs |
| [HBASE-18787](https://issues.apache.org/jira/browse/HBASE-18787) | Fix the "dependencies connecting to an HBase cluster" | Minor | documentation |
| [HBASE-18853](https://issues.apache.org/jira/browse/HBASE-18853) | hbase-protocol-shaded includes protobuf (since we moved to hbase-thirdparty) | Major | thirdparty |
| [HBASE-18852](https://issues.apache.org/jira/browse/HBASE-18852) | Take down the hbasecon asia banner on home page | Major | website |
| [HBASE-18851](https://issues.apache.org/jira/browse/HBASE-18851) | LICENSE failure after HADOOP-14799 with Hadoop 3 | Critical | build |
| [HBASE-18832](https://issues.apache.org/jira/browse/HBASE-18832) | LTT fails with casting exception for HColumnDescriptor | Major | . |
| [HBASE-18803](https://issues.apache.org/jira/browse/HBASE-18803) | Mapreduce job get failed caused by NoClassDefFoundError: org/apache/commons/lang3/ArrayUtils | Major | . |
| [HBASE-18808](https://issues.apache.org/jira/browse/HBASE-18808) | Ineffective config check in BackupLogCleaner#getDeletableFiles() | Major | . |
| [HBASE-18836](https://issues.apache.org/jira/browse/HBASE-18836) | Note need for explicit javax.el and exclude from shaded artifacts | Blocker | Client |
| [HBASE-18834](https://issues.apache.org/jira/browse/HBASE-18834) | fix shellcheck warning on hbase personality | Minor | test |
| [HBASE-18831](https://issues.apache.org/jira/browse/HBASE-18831) | Add explicit dependency on javax.el | Major | dependencies |
| [HBASE-18641](https://issues.apache.org/jira/browse/HBASE-18641) | Include block content verification logic used in lruCache in bucketCache | Minor | regionserver |
| [HBASE-14004](https://issues.apache.org/jira/browse/HBASE-14004) | [Replication] Inconsistency between Memstore and WAL may result in data in remote cluster that is not in the origin | Critical | regionserver, Replication |
| [HBASE-18801](https://issues.apache.org/jira/browse/HBASE-18801) | Bulk load cleanup may falsely deem file deletion successful | Major | . |
| [HBASE-18813](https://issues.apache.org/jira/browse/HBASE-18813) | TestCanaryTool fails on branch-1 / branch-1.4 | Major | . |
| [HBASE-18818](https://issues.apache.org/jira/browse/HBASE-18818) | TestConnectionImplemenation fails | Major | test |
| [HBASE-16611](https://issues.apache.org/jira/browse/HBASE-16611) | Flakey org.apache.hadoop.hbase.client.TestReplicasClient.testCancelOfMultiGet | Major | . |
| [HBASE-18723](https://issues.apache.org/jira/browse/HBASE-18723) | [pom cleanup] Do a pass with dependency:analyze; remove unused and explicity list the dependencies we exploit | Major | pom |
| [HBASE-18789](https://issues.apache.org/jira/browse/HBASE-18789) | Displays the reporting interval of each RS on the Master page | Major | . |
| [HBASE-18771](https://issues.apache.org/jira/browse/HBASE-18771) | Incorrect StoreFileRefresh leading to split and compaction failures | Blocker | . |
| [HBASE-18791](https://issues.apache.org/jira/browse/HBASE-18791) | HBASE\_HOME/lib does not contain hbase-mapreduce-${project.version}-tests.jar | Major | . |
| [HBASE-17853](https://issues.apache.org/jira/browse/HBASE-17853) | Link to "Why does HBase care about /etc/hosts?" does not work | Trivial | documentation |
| [HBASE-18759](https://issues.apache.org/jira/browse/HBASE-18759) | Fix hbase-shaded-check-invariants failure | Blocker | Client, mapreduce |
| [HBASE-18765](https://issues.apache.org/jira/browse/HBASE-18765) | The value of balancerRan is true even though no plans are executed | Minor | rsgroup |
| [HBASE-18543](https://issues.apache.org/jira/browse/HBASE-18543) | Re-enable test master.TestMasterFailover on master | Major | amv2 |
| [HBASE-17713](https://issues.apache.org/jira/browse/HBASE-17713) | the interface '/version/cluster' with header 'Accept: application/json' return is not JSON but plain text | Minor | REST |
| [HBASE-18757](https://issues.apache.org/jira/browse/HBASE-18757) | Fix Improper bitwise & in BucketCache offset calculation | Major | BucketCache |
| [HBASE-18743](https://issues.apache.org/jira/browse/HBASE-18743) | HFiles in use by a table which has the same name and namespace with a default table cloned from snapshot may be deleted when that snapshot and default table are deleted | Critical | hbase |
| [HBASE-15497](https://issues.apache.org/jira/browse/HBASE-15497) | Incorrect javadoc for atomicity guarantee of Increment and Append | Minor | documentation |
| [HBASE-16390](https://issues.apache.org/jira/browse/HBASE-16390) | Fix documentation around setAutoFlush | Minor | documentation |
| [HBASE-18741](https://issues.apache.org/jira/browse/HBASE-18741) | Remove cancel command from backup code | Major | . |
| [HBASE-18461](https://issues.apache.org/jira/browse/HBASE-18461) | Build broken If the username contains a backslash | Minor | . |
| [HBASE-18306](https://issues.apache.org/jira/browse/HBASE-18306) | Get rid of TableDescriptor#getConfiguration | Critical | . |
| [HBASE-15947](https://issues.apache.org/jira/browse/HBASE-15947) | Classes used only for tests included in main code base | Trivial | build, test |
| [HBASE-18714](https://issues.apache.org/jira/browse/HBASE-18714) | The dropBehind and readahead don't be applied when useHBaseChecksum is enabled | Minor | . |
| [HBASE-14745](https://issues.apache.org/jira/browse/HBASE-14745) | Shade the last few dependencies in hbase-shaded-client | Blocker | Client, dependencies |
| [HBASE-18665](https://issues.apache.org/jira/browse/HBASE-18665) | ReversedScannerCallable invokes getRegionLocations incorrectly | Critical | . |
| [HBASE-18568](https://issues.apache.org/jira/browse/HBASE-18568) | Correct metric of numRegions | Critical | metrics |
| [HBASE-18369](https://issues.apache.org/jira/browse/HBASE-18369) | hbase thrift web-ui not available | Major | Thrift |
| [HBASE-18640](https://issues.apache.org/jira/browse/HBASE-18640) | Move mapreduce out of hbase-server into separate hbase-mapreduce module | Major | . |
| [HBASE-18633](https://issues.apache.org/jira/browse/HBASE-18633) | Add more info to understand the source/scenario of large batch requests exceeding threshold | Major | . |
| [HBASE-18635](https://issues.apache.org/jira/browse/HBASE-18635) | Fix asciidoc warnings | Major | . |
| [HBASE-18671](https://issues.apache.org/jira/browse/HBASE-18671) | Support Append/Increment in rest api | Major | REST |
| [HBASE-16722](https://issues.apache.org/jira/browse/HBASE-16722) | Document: Broken link in CatalogJanitor | Trivial | documentation |
| [HBASE-18679](https://issues.apache.org/jira/browse/HBASE-18679) | YARN may null Counters object and cause an NPE in ITBLL | Trivial | integration tests |
| [HBASE-18607](https://issues.apache.org/jira/browse/HBASE-18607) | fix submit-patch.py to support utf8 | Trivial | . |
| [HBASE-18287](https://issues.apache.org/jira/browse/HBASE-18287) | Remove log warning in PartitionedMobCompactor.java#getFileStatus | Minor | mob |
| [HBASE-18647](https://issues.apache.org/jira/browse/HBASE-18647) | Parameter cacheBlocks does not take effect in REST API for scan | Major | REST |
| [HBASE-18628](https://issues.apache.org/jira/browse/HBASE-18628) | ZKPermissionWatcher blocks all ZK notifications | Critical | regionserver |
| [HBASE-18614](https://issues.apache.org/jira/browse/HBASE-18614) | Setting BUCKET\_CACHE\_COMBINED\_KEY to false disables stats on RS UI | Major | regionserver |
| [HBASE-18575](https://issues.apache.org/jira/browse/HBASE-18575) | [AMv2] Enable and fix TestRestartCluster#testRetainAssignmentOnRestart on master | Critical | amv2 |
| [HBASE-18655](https://issues.apache.org/jira/browse/HBASE-18655) | TestAsyncClusterAdminApi2 failing sometimes | Major | . |
| [HBASE-18615](https://issues.apache.org/jira/browse/HBASE-18615) | hbase-rest tests fail in hbase-2.0.0-alpha2 | Blocker | test |
| [HBASE-18644](https://issues.apache.org/jira/browse/HBASE-18644) | Duplicate "compactionQueueLength" metric in Region Server metrics | Minor | metrics |
| [HBASE-16615](https://issues.apache.org/jira/browse/HBASE-16615) | Fix flaky TestScannerHeartbeatMessages | Major | Client, Scanners |
| [HBASE-18627](https://issues.apache.org/jira/browse/HBASE-18627) | Fix TestRegionServerReadRequestMetrics | Major | test |
| [HBASE-18634](https://issues.apache.org/jira/browse/HBASE-18634) | Fix client.TestClientClusterStatus | Major | test |
| [HBASE-18637](https://issues.apache.org/jira/browse/HBASE-18637) | Update the link of "Bending time in HBase" | Trivial | documentation |
| [HBASE-18471](https://issues.apache.org/jira/browse/HBASE-18471) | The DeleteFamily cell is skipped when StoreScanner seeks to next column | Critical | Deletes, hbase, scan |
| [HBASE-18572](https://issues.apache.org/jira/browse/HBASE-18572) | Delete can't remove the cells which have no visibility label | Critical | . |
| [HBASE-18617](https://issues.apache.org/jira/browse/HBASE-18617) | FuzzyRowKeyFilter should not modify the filter pairs | Minor | . |
| [HBASE-18125](https://issues.apache.org/jira/browse/HBASE-18125) | HBase shell disregards spaces at the end of a split key in a split file | Major | shell |
| [HBASE-18587](https://issues.apache.org/jira/browse/HBASE-18587) | Fix Flaky TestFileIOEngine | Major | BucketCache, test |
| [HBASE-18431](https://issues.apache.org/jira/browse/HBASE-18431) | Mitigate compatibility concerns between branch-1.3 and branch-1.4 | Blocker | . |
| [HBASE-18493](https://issues.apache.org/jira/browse/HBASE-18493) | [AMv2] On region server crash do not process system table regions through AssignmentManager.checkIfShouldMoveSystemRegionAsync() | Critical | amv2 |
| [HBASE-18598](https://issues.apache.org/jira/browse/HBASE-18598) | AsyncNonMetaRegionLocator use FIFO algorithm to get a candidate locate request | Minor | asyncclient |
| [HBASE-18437](https://issues.apache.org/jira/browse/HBASE-18437) | Revoke access permissions of a user from a table does not work as expected | Major | security |
| [HBASE-18526](https://issues.apache.org/jira/browse/HBASE-18526) | FIFOCompactionPolicy pre-check uses wrong scope | Major | master |
| [HBASE-18599](https://issues.apache.org/jira/browse/HBASE-18599) | Add missing @Deprecated annotations | Minor | . |
| [HBASE-17803](https://issues.apache.org/jira/browse/HBASE-17803) | PE always re-creates table when we specify the split policy | Minor | . |
| [HBASE-18592](https://issues.apache.org/jira/browse/HBASE-18592) | [hbase-thirdparty] Doc on new hbase-thirdparty dependency for the refguide | Major | documentation |
| [HBASE-18557](https://issues.apache.org/jira/browse/HBASE-18557) | change splitable to mergeable in MergeTableRegionsProcedure | Major | . |
| [HBASE-18025](https://issues.apache.org/jira/browse/HBASE-18025) | CatalogJanitor should collect outdated RegionStates from the AM | Major | read replicas |
| [HBASE-18551](https://issues.apache.org/jira/browse/HBASE-18551) | [AMv2] UnassignProcedure and crashed regionservers | Major | amv2 |
| [HBASE-18390](https://issues.apache.org/jira/browse/HBASE-18390) | Sleep too long when finding region location failed | Major | Client |
| [HBASE-18563](https://issues.apache.org/jira/browse/HBASE-18563) | Fix RAT License complaint about website jenkins scripts | Trivial | . |
| [HBASE-18024](https://issues.apache.org/jira/browse/HBASE-18024) | HRegion#initializeRegionInternals should not re-create .hregioninfo file when the region directory no longer exists | Major | Region Assignment, regionserver |
| [HBASE-18560](https://issues.apache.org/jira/browse/HBASE-18560) | Test master.assignment.TestAssignmentManager hangs on master and its in flaky list | Major | . |
| [HBASE-18262](https://issues.apache.org/jira/browse/HBASE-18262) | name of parameter quote need update in hbase-default.xml | Minor | . |
| [HBASE-18525](https://issues.apache.org/jira/browse/HBASE-18525) | TestAssignmentManager#testSocketTimeout fails in master branch | Major | . |
| [HBASE-18492](https://issues.apache.org/jira/browse/HBASE-18492) | [AMv2] Embed code for selecting highest versioned region server for system table regions in AssignmentManager.processAssignQueue() | Major | amv2 |
| [HBASE-18516](https://issues.apache.org/jira/browse/HBASE-18516) | [AMv2] Remove dead code in ServerManager resulted mostly from AMv2 refactoring | Major | . |
| [HBASE-18470](https://issues.apache.org/jira/browse/HBASE-18470) | Remove the redundant comma from RetriesExhaustedWithDetailsException#getDesc | Minor | Client |
| [HBASE-17056](https://issues.apache.org/jira/browse/HBASE-17056) | Remove checked in PB generated files | Critical | . |
| [HBASE-18480](https://issues.apache.org/jira/browse/HBASE-18480) | The cost of BaseLoadBalancer.cluster is changed even if the rollback is done | Major | Balancer |
| [HBASE-18491](https://issues.apache.org/jira/browse/HBASE-18491) | [AMv2] Fail UnassignProcedure if source Region Server is not online. | Critical | amv2 |
| [HBASE-18487](https://issues.apache.org/jira/browse/HBASE-18487) | Minor fixes in row lock implementation | Major | . |
| [HBASE-18475](https://issues.apache.org/jira/browse/HBASE-18475) | MasterProcedureScheduler incorrectly passes null Procedure to table locking | Major | proc-v2 |
| [HBASE-18259](https://issues.apache.org/jira/browse/HBASE-18259) | HBase book link to "beginner" issues includes resolved issues | Major | documentation |
| [HBASE-18481](https://issues.apache.org/jira/browse/HBASE-18481) | The autoFlush flag was not used in PE tool | Minor | . |
| [HBASE-18406](https://issues.apache.org/jira/browse/HBASE-18406) | In ServerCrashProcedure.java start(MasterProcedureEnv) is a no-op | Major | . |
| [HBASE-18473](https://issues.apache.org/jira/browse/HBASE-18473) | VC.listLabels() erroneously closes any connection | Major | Client |
| [HBASE-17131](https://issues.apache.org/jira/browse/HBASE-17131) | Avoid livelock caused by HRegion#processRowsWithLocks | Major | regionserver |
| [HBASE-18185](https://issues.apache.org/jira/browse/HBASE-18185) | IntegrationTestTimeBoundedRequestsWithRegionReplicas unbalanced tests fails with AssertionError | Minor | integration tests |
| [HBASE-18362](https://issues.apache.org/jira/browse/HBASE-18362) | hbck should not report split replica parent region from meta as errors | Minor | hbck |
| [HBASE-17839](https://issues.apache.org/jira/browse/HBASE-17839) | "Data Model" section: Table 1 has only 5 data rows instead 6. | Trivial | documentation |
| [HBASE-18445](https://issues.apache.org/jira/browse/HBASE-18445) | Upgrading Guava broke hadoop-3.0 profile | Blocker | build, dependencies, hadoop3 |
| [HBASE-18449](https://issues.apache.org/jira/browse/HBASE-18449) | Fix client.locking.TestEntityLocks#testHeartbeatException | Minor | test |
| [HBASE-18447](https://issues.apache.org/jira/browse/HBASE-18447) | MetricRegistryInfo#hashCode uses hashCode instead of toHashCode | Minor | . |
| [HBASE-18441](https://issues.apache.org/jira/browse/HBASE-18441) | ZookeeperWatcher#interruptedException should throw exception | Major | . |
| [HBASE-18054](https://issues.apache.org/jira/browse/HBASE-18054) | log when we add/remove failed servers in client | Major | Client, Operability |
| [HBASE-18427](https://issues.apache.org/jira/browse/HBASE-18427) | minor cleanup around AssignmentManager | Minor | amv2 |
| [HBASE-18323](https://issues.apache.org/jira/browse/HBASE-18323) | Remove multiple ACLs for the same user in kerberos | Minor | . |
| [HBASE-18354](https://issues.apache.org/jira/browse/HBASE-18354) | Fix TestMasterMetrics that were disabled by Proc-V2 AM in HBASE-14614 | Major | test |
| [HBASE-18433](https://issues.apache.org/jira/browse/HBASE-18433) | Convenience method for creating simple ColumnFamilyDescriptor | Major | Client |
| [HBASE-18430](https://issues.apache.org/jira/browse/HBASE-18430) | Typo in "contributing to documentation" page | Major | documentation |
| [HBASE-18404](https://issues.apache.org/jira/browse/HBASE-18404) | Small typo on ACID documentation page | Trivial | documentation |
| [HBASE-16993](https://issues.apache.org/jira/browse/HBASE-16993) | BucketCache throw java.io.IOException: Invalid HFile block magic when configuring hbase.bucketcache.bucket.sizes | Major | BucketCache |
| [HBASE-18337](https://issues.apache.org/jira/browse/HBASE-18337) | hbase-shaded-server brings in signed jars | Major | shading |
| [HBASE-18330](https://issues.apache.org/jira/browse/HBASE-18330) | NPE in ReplicationZKLockCleanerChore | Major | master, Replication |
| [HBASE-18393](https://issues.apache.org/jira/browse/HBASE-18393) | hbase shell non-interactive broken | Blocker | scripts, shell |
| [HBASE-17648](https://issues.apache.org/jira/browse/HBASE-17648) | HBase Table-level synchronization fails between two secured(kerberized) clusters | Critical | mapreduce, Operability, security, tooling |
| [HBASE-16090](https://issues.apache.org/jira/browse/HBASE-16090) | ResultScanner is not closed in SyncTable#finishRemainingHashRanges() | Major | mapreduce, Operability, tooling |
| [HBASE-15548](https://issues.apache.org/jira/browse/HBASE-15548) | SyncTable: sourceHashDir is supposed to be optional but won't work without | Critical | mapreduce, Operability, tooling |
| [HBASE-18377](https://issues.apache.org/jira/browse/HBASE-18377) | Error handling for FileNotFoundException should consider RemoteException in openReader() | Major | . |
| [HBASE-18260](https://issues.apache.org/jira/browse/HBASE-18260) | Address new license dependencies from hadoop3-alpha4 | Major | dependencies |
| [HBASE-18177](https://issues.apache.org/jira/browse/HBASE-18177) | FanOutOneBlockAsyncDFSOutputHelper fails to compile against Hadoop 3 | Major | wal |
| [HBASE-18358](https://issues.apache.org/jira/browse/HBASE-18358) | Backport HBASE-18099 'FlushSnapshotSubprocedure should wait for concurrent Region#flush() to finish' to branch-1.3 | Critical | snapshots |
| [HBASE-18348](https://issues.apache.org/jira/browse/HBASE-18348) | The implementation of AsyncTableRegionLocator does not follow the javadoc | Critical | asyncclient, Client |
| [HBASE-18292](https://issues.apache.org/jira/browse/HBASE-18292) | Fix flaky test hbase.master.locking.TestLockProcedure#testLocalMasterLockRecovery() | Major | . |
| [HBASE-17705](https://issues.apache.org/jira/browse/HBASE-17705) | Procedure execution must fail fast if procedure is not registered | Blocker | . |
| [HBASE-18341](https://issues.apache.org/jira/browse/HBASE-18341) | Update findHangingTests.py script to match changed consoleText of trunk build | Major | . |
| [HBASE-18335](https://issues.apache.org/jira/browse/HBASE-18335) | clean up configuration guide | Major | documentation |
| [HBASE-18329](https://issues.apache.org/jira/browse/HBASE-18329) | update links in config guide to point to java 8 references | Major | documentation |
| [HBASE-18312](https://issues.apache.org/jira/browse/HBASE-18312) | Ineffective handling of FileNotFoundException in FileLink$FileLinkInputStream.tryOpen() | Major | . |
| [HBASE-17931](https://issues.apache.org/jira/browse/HBASE-17931) | Assign system tables to servers with highest version | Blocker | Region Assignment, scan |
| [HBASE-18325](https://issues.apache.org/jira/browse/HBASE-18325) | Disable flakey TestMasterProcedureWalLease | Major | test |
| [HBASE-16120](https://issues.apache.org/jira/browse/HBASE-16120) | Add shell test for truncate\_preserve | Minor | . |
| [HBASE-18301](https://issues.apache.org/jira/browse/HBASE-18301) | Enable TestSimpleRegionNormalizerOnCluster#testRegionNormalizationMergeOnCluster that was disabled by Proc-V2 AM in HBASE-14614 | Major | test |
| [HBASE-18310](https://issues.apache.org/jira/browse/HBASE-18310) | LoadTestTool unable to write data | Major | util |
| [HBASE-18320](https://issues.apache.org/jira/browse/HBASE-18320) | Address maven-site-plugin upgrade steps | Blocker | website |
| [HBASE-18311](https://issues.apache.org/jira/browse/HBASE-18311) | clean up the quickstart guide | Major | documentation |
| [HBASE-13866](https://issues.apache.org/jira/browse/HBASE-13866) | Add endpoint coprocessor to the section hbase.coprocessor.region.classes in HBase book | Trivial | documentation |
| [HBASE-18302](https://issues.apache.org/jira/browse/HBASE-18302) | Protobuf section in the docs needs some clean up | Blocker | documentation |
| [HBASE-16192](https://issues.apache.org/jira/browse/HBASE-16192) | Fix the potential problems in TestAcidGuarantees | Major | . |
| [HBASE-17982](https://issues.apache.org/jira/browse/HBASE-17982) | Is the word "occured" should be "occurred ? | Trivial | hbase |
| [HBASE-18290](https://issues.apache.org/jira/browse/HBASE-18290) | Fix TestAddColumnFamilyProcedure and TestDeleteTableProcedure | Major | test |
| [HBASE-18278](https://issues.apache.org/jira/browse/HBASE-18278) | [AMv2] Enable and fix uni test hbase.master.procedure.TestServerCrashProcedure#testRecoveryAndDoubleExecutionOnRsWithMeta | Major | . |
| [HBASE-18244](https://issues.apache.org/jira/browse/HBASE-18244) | org.apache.hadoop.hbase.client.rsgroup.TestShellRSGroups hangs/fails | Major | test |
| [HBASE-18230](https://issues.apache.org/jira/browse/HBASE-18230) | Generated LICENSE file includes unsubstituted Velocity variables | Major | build |
| [HBASE-18274](https://issues.apache.org/jira/browse/HBASE-18274) | hbase autorestart will overwrite the gc log | Major | hbase |
| [HBASE-18265](https://issues.apache.org/jira/browse/HBASE-18265) | Correct the link unuseful in regionServer's region state UI | Trivial | UI |
| [HBASE-18263](https://issues.apache.org/jira/browse/HBASE-18263) | Resolve NPE in backup Master UI when access to procedures.jsp | Trivial | UI |
| [HBASE-18254](https://issues.apache.org/jira/browse/HBASE-18254) | ServerCrashProcedure checks and waits for meta initialized, instead should check and wait for meta loaded | Major | amv2 |
| [HBASE-18235](https://issues.apache.org/jira/browse/HBASE-18235) | LoadBalancer.BOGUS\_SERVER\_NAME should not have a bogus hostname | Major | . |
| [HBASE-18212](https://issues.apache.org/jira/browse/HBASE-18212) | In Standalone mode with local filesystem HBase logs Warning message:Failed to invoke 'unbuffer' method in class class org.apache.hadoop.fs.FSDataInputStream | Minor | Operability |
| [HBASE-17988](https://issues.apache.org/jira/browse/HBASE-17988) | get-active-master.rb and draining\_servers.rb no longer work | Critical | scripts |
| [HBASE-18180](https://issues.apache.org/jira/browse/HBASE-18180) | Possible connection leak while closing BufferedMutator in TableOutputFormat | Major | mapreduce |
| [HBASE-18227](https://issues.apache.org/jira/browse/HBASE-18227) | [AMv2] Fix test hbase.coprocessor.TestCoprocessorMetrics#testRegionObserverAfterRegionClosed | Major | amv2 |
| [HBASE-18225](https://issues.apache.org/jira/browse/HBASE-18225) | Fix findbugs regression calling toString() on an array | Trivial | . |
| [HBASE-18166](https://issues.apache.org/jira/browse/HBASE-18166) | [AMv2] We are splitting already-split files | Major | Region Assignment |
| [HBASE-18209](https://issues.apache.org/jira/browse/HBASE-18209) | Include httpclient / httpcore jars in build artifacts | Major | . |
| [HBASE-18219](https://issues.apache.org/jira/browse/HBASE-18219) | Fix typo in constant HConstants.HBASE\_CLIENT\_MEAT\_REPLICA\_SCAN\_TIMEOUT | Minor | . |
| [HBASE-18200](https://issues.apache.org/jira/browse/HBASE-18200) | Set hadoop check versions for branch-2 and branch-2.x in pre commit | Major | build |
| [HBASE-18207](https://issues.apache.org/jira/browse/HBASE-18207) | branch-2 build fails in the checkstyle phase | Major | . |
| [HBASE-18137](https://issues.apache.org/jira/browse/HBASE-18137) | Replication gets stuck for empty WALs | Critical | Replication |
| [HBASE-18199](https://issues.apache.org/jira/browse/HBASE-18199) | Race in NettyRpcConnection may cause call stuck in BufferCallBeforeInitHandler forever | Major | IPC/RPC |
| [HBASE-18192](https://issues.apache.org/jira/browse/HBASE-18192) | Replication drops recovered queues on region server shutdown | Blocker | Replication |
| [HBASE-18092](https://issues.apache.org/jira/browse/HBASE-18092) | Removing a peer does not properly clean up the ReplicationSourceManager state and metrics | Major | Replication |
| [HBASE-18193](https://issues.apache.org/jira/browse/HBASE-18193) | Master web UI presents the incorrect number of regions | Minor | . |
| [HBASE-18195](https://issues.apache.org/jira/browse/HBASE-18195) | Remove redundant single quote from start message for HMaster and HRegionServer | Minor | master, regionserver |
| [HBASE-18141](https://issues.apache.org/jira/browse/HBASE-18141) | Regionserver fails to shutdown when abort triggered in RegionScannerImpl during RPC call | Critical | regionserver, security |
| [HBASE-15302](https://issues.apache.org/jira/browse/HBASE-15302) | Reenable the other tests disabled by HBASE-14678 | Major | test |
| [HBASE-18184](https://issues.apache.org/jira/browse/HBASE-18184) | Add hbase-hadoop2-compat jar as MapReduce job dependency | Minor | mapreduce |
| [HBASE-18149](https://issues.apache.org/jira/browse/HBASE-18149) | The setting rules for table-scope attributes and family-scope attributes should keep consistent | Major | shell |
| [HBASE-18158](https://issues.apache.org/jira/browse/HBASE-18158) | Two running in-memory compaction threads may lose data | Major | . |
| [HBASE-18145](https://issues.apache.org/jira/browse/HBASE-18145) | The flush may cause the corrupt data for reading | Blocker | . |
| [HBASE-18132](https://issues.apache.org/jira/browse/HBASE-18132) | Low replication should be checked in period in case of datanode rolling upgrade | Major | . |
| [HBASE-9393](https://issues.apache.org/jira/browse/HBASE-9393) | Hbase does not closing a closed socket resulting in many CLOSE\_WAIT | Critical | . |
| [HBASE-18005](https://issues.apache.org/jira/browse/HBASE-18005) | read replica: handle the case that region server hosting both primary replica and meta region is down | Major | . |
| [HBASE-18030](https://issues.apache.org/jira/browse/HBASE-18030) | Per Cell TTL tags may get duplicated with increments/Append causing tags length overflow | Critical | hbase, regionserver |
| [HBASE-18155](https://issues.apache.org/jira/browse/HBASE-18155) | TestMasterProcedureWalLease is flakey | Major | amv2 |
| [HBASE-18111](https://issues.apache.org/jira/browse/HBASE-18111) | Replication stuck when cluster connection is closed | Major | . |
| [HBASE-18143](https://issues.apache.org/jira/browse/HBASE-18143) | [AMv2] Backoff on failed report of region transition quickly goes to astronomical time scale | Critical | Region Assignment |
| [HBASE-18129](https://issues.apache.org/jira/browse/HBASE-18129) | truncate\_preserve fails when the truncate method doesn't exists on the master | Major | shell |
| [HBASE-18122](https://issues.apache.org/jira/browse/HBASE-18122) | Scanner id should include ServerName of region server | Major | . |
| [HBASE-18027](https://issues.apache.org/jira/browse/HBASE-18027) | Replication should respect RPC size limits when batching edits | Major | Replication |
| [HBASE-18042](https://issues.apache.org/jira/browse/HBASE-18042) | Client Compatibility breaks between versions 1.2 and 1.3 | Critical | regionserver, scan |
| [HBASE-18118](https://issues.apache.org/jira/browse/HBASE-18118) | Default storage policy if not configured cannot be "NONE" | Minor | wal |
| [HBASE-16011](https://issues.apache.org/jira/browse/HBASE-16011) | TableSnapshotScanner and TableSnapshotInputFormat can produce duplicate rows | Major | snapshots |
| [HBASE-18120](https://issues.apache.org/jira/browse/HBASE-18120) | Fix TestAsyncRegionAdminApi | Major | test |
| [HBASE-18113](https://issues.apache.org/jira/browse/HBASE-18113) | Handle old client without include\_stop\_row flag when startRow equals endRow | Major | . |
| [HBASE-17997](https://issues.apache.org/jira/browse/HBASE-17997) | In dev environment, add jruby-complete jar to classpath only when jruby is needed | Major | . |
| [HBASE-18099](https://issues.apache.org/jira/browse/HBASE-18099) | FlushSnapshotSubprocedure should wait for concurrent Region#flush() to finish | Critical | snapshots |
| [HBASE-18084](https://issues.apache.org/jira/browse/HBASE-18084) | Improve CleanerChore to clean from directory which consumes more disk space | Major | . |
| [HBASE-18085](https://issues.apache.org/jira/browse/HBASE-18085) | Prevent parallel purge in ObjectPool | Major | . |
| [HBASE-18093](https://issues.apache.org/jira/browse/HBASE-18093) | Overloading the meaning of 'enabled' in Quota Manager to indicate either quota disabled or quota manager not ready is not good | Minor | master |
| [HBASE-18077](https://issues.apache.org/jira/browse/HBASE-18077) | Update JUnit license to EPL from CPL | Blocker | build, community |
| [HBASE-18069](https://issues.apache.org/jira/browse/HBASE-18069) | Fix flaky test TestReplicationAdminWithClusters#testDisableAndEnableReplication | Trivial | test |
| [HBASE-15616](https://issues.apache.org/jira/browse/HBASE-15616) | Allow null qualifier for all table operations | Major | Client |
| [HBASE-18081](https://issues.apache.org/jira/browse/HBASE-18081) | The way we process connection preamble in SimpleRpcServer is broken | Major | IPC/RPC |
| [HBASE-18035](https://issues.apache.org/jira/browse/HBASE-18035) | Meta replica does not give any primaryOperationTimeout to primary meta region | Critical | . |
| [HBASE-18071](https://issues.apache.org/jira/browse/HBASE-18071) | Fix flaky test TestStochasticLoadBalancer#testBalanceCluster | Major | Balancer |
| [HBASE-18058](https://issues.apache.org/jira/browse/HBASE-18058) | Zookeeper retry sleep time should have an upper limit | Major | . |
| [HBASE-17286](https://issues.apache.org/jira/browse/HBASE-17286) | LICENSE.txt in binary tarball contains only ASL text | Blocker | build, community |
| [HBASE-18049](https://issues.apache.org/jira/browse/HBASE-18049) | It is not necessary to re-open the region when MOB files cannot be found | Major | Scanners |
| [HBASE-18053](https://issues.apache.org/jira/browse/HBASE-18053) | AsyncTableResultScanner will hang when scan wrong column family | Major | Client |
| [HBASE-18051](https://issues.apache.org/jira/browse/HBASE-18051) | balance\_rsgroup still run when the Load Balancer is not enabled. | Major | rsgroup |
| [HBASE-17352](https://issues.apache.org/jira/browse/HBASE-17352) | Fix hbase-assembly build with bash 4 | Minor | . |
| [HBASE-18055](https://issues.apache.org/jira/browse/HBASE-18055) | Releasing L2 cache HFileBlocks before shipped() when switching from pread to stream causes result corruption | Major | regionserver, Scanners |
| [HBASE-18000](https://issues.apache.org/jira/browse/HBASE-18000) | Make sure we always return the scanner id with ScanResponse | Major | regionserver |
| [HBASE-18026](https://issues.apache.org/jira/browse/HBASE-18026) | ProtobufUtil seems to do extra array copying | Minor | . |
| [HBASE-16356](https://issues.apache.org/jira/browse/HBASE-16356) | REST API scanner: row prefix filter and custom filter parameters are mutually exclusive | Minor | REST |
| [HBASE-8758](https://issues.apache.org/jira/browse/HBASE-8758) | Error in RegionCoprocessorHost class preScanner method documentation. | Minor | Coprocessors, documentation |
| [HBASE-17471](https://issues.apache.org/jira/browse/HBASE-17471) | Region Seqid will be out of order in WAL if using mvccPreAssign | Critical | wal |
| [HBASE-17964](https://issues.apache.org/jira/browse/HBASE-17964) | ensure hbase-metrics-api is included in mapreduce job classpaths | Blocker | mapreduce |
| [HBASE-17991](https://issues.apache.org/jira/browse/HBASE-17991) | Add more details about compaction queue on /dump | Minor | . |
| [HBASE-17228](https://issues.apache.org/jira/browse/HBASE-17228) | precommit grep -c ERROR may grab non errors | Minor | build, community, test |
| [HBASE-17958](https://issues.apache.org/jira/browse/HBASE-17958) | Avoid passing unexpected cell to ScanQueryMatcher when optimize SEEK to SKIP | Major | . |
| [HBASE-17985](https://issues.apache.org/jira/browse/HBASE-17985) | Inline package manage updates with package installation in Yetus Dockerfile | Blocker | . |
| [HBASE-17957](https://issues.apache.org/jira/browse/HBASE-17957) | Custom metrics of replicate endpoints don't prepend "source." to global metrics | Minor | Replication |
| [HBASE-17862](https://issues.apache.org/jira/browse/HBASE-17862) | Condition that always returns true | Trivial | Client |
| [HBASE-14286](https://issues.apache.org/jira/browse/HBASE-14286) | Correct typo in argument name for WALSplitter.writeRegionSequenceIdFile | Trivial | . |
| [HBASE-17879](https://issues.apache.org/jira/browse/HBASE-17879) | Avoid NPE in snapshot.jsp when accessing without any request parameter | Trivial | UI |
| [HBASE-17975](https://issues.apache.org/jira/browse/HBASE-17975) | TokenUtil.obtainToken squashes remote exceptions | Blocker | mapreduce, security |
| [HBASE-17970](https://issues.apache.org/jira/browse/HBASE-17970) | Set yarn.app.mapreduce.am.staging-dir when starting MiniMRCluster | Major | mapreduce, snapshots, test |
| [HBASE-17950](https://issues.apache.org/jira/browse/HBASE-17950) | Write the chunkId also as Int instead of long into the first byte of the chunk | Major | . |
| [HBASE-17904](https://issues.apache.org/jira/browse/HBASE-17904) | Get runs into NoSuchElementException when using Read Replica, with hbase. ipc.client.specificThreadForWriting to be true and hbase.rpc.client.impl to be org.apache.hadoop.hbase.ipc.RpcClientImpl | Major | Client, IPC/RPC |
| [HBASE-17947](https://issues.apache.org/jira/browse/HBASE-17947) | Location of Examples.proto is wrong in comment of RowCountEndPoint.java | Trivial | Coprocessors |
| [HBASE-17302](https://issues.apache.org/jira/browse/HBASE-17302) | The region flush request disappeared from flushQueue | Major | . |
| [HBASE-17943](https://issues.apache.org/jira/browse/HBASE-17943) | The in-memory flush size is different for each CompactingMemStore located in the same region | Major | regionserver |
| [HBASE-17946](https://issues.apache.org/jira/browse/HBASE-17946) | Shell command compact\_rs don't work | Major | shell |
| [HBASE-17941](https://issues.apache.org/jira/browse/HBASE-17941) | CellArrayMap#getCell may throw IndexOutOfBoundsException | Minor | . |
| [HBASE-13288](https://issues.apache.org/jira/browse/HBASE-13288) | Fix naming of parameter in Delete constructor | Trivial | API |
| [HBASE-17937](https://issues.apache.org/jira/browse/HBASE-17937) | Memstore size becomes negative in case of expensive postPut/Delete Coprocessor call | Major | regionserver |
| [HBASE-17940](https://issues.apache.org/jira/browse/HBASE-17940) | HMaster can not start due to Jasper related classes conflict | Blocker | dependencies, pom |
| [HBASE-17936](https://issues.apache.org/jira/browse/HBASE-17936) | Refine sum endpoint example in ref guide | Minor | documentation |
| [HBASE-17930](https://issues.apache.org/jira/browse/HBASE-17930) | Avoid using Canary.sniff in HBaseTestingUtility | Major | canary, test |
| [HBASE-16875](https://issues.apache.org/jira/browse/HBASE-16875) | Changed try-with-resources in the docs to recommended way | Trivial | documentation |
| [HBASE-17366](https://issues.apache.org/jira/browse/HBASE-17366) | Run TestHFile#testReaderWithoutBlockCache failes | Trivial | test |
| [HBASE-15535](https://issues.apache.org/jira/browse/HBASE-15535) | Correct link to Trafodion | Minor | documentation |
| [HBASE-17903](https://issues.apache.org/jira/browse/HBASE-17903) | Corrected the alias for the link of HBASE-6580 | Trivial | documentation |
| [HBASE-17816](https://issues.apache.org/jira/browse/HBASE-17816) | HRegion#mutateRowWithLocks should update writeRequestCount metric | Major | metrics |
| [HBASE-17905](https://issues.apache.org/jira/browse/HBASE-17905) | [hbase-spark] bulkload does not work when table not exist | Major | . |
| [HBASE-17863](https://issues.apache.org/jira/browse/HBASE-17863) | Procedure V2: Proc Executor cleanup. Split FINISHED state to two states: SUCCESS and FAILED. | Major | proc-v2 |
| [HBASE-17886](https://issues.apache.org/jira/browse/HBASE-17886) | Fix compatibility of ServerSideScanMetrics | Blocker | . |
| [HBASE-17869](https://issues.apache.org/jira/browse/HBASE-17869) | UnsafeAvailChecker wrongly returns false on ppc | Minor | . |
| [HBASE-17871](https://issues.apache.org/jira/browse/HBASE-17871) | scan#setBatch(int) call leads wrong result of VerifyReplication | Minor | . |
| [HBASE-15871](https://issues.apache.org/jira/browse/HBASE-15871) | Memstore flush doesn't finish because of backwardseek() in memstore scanner. | Major | Scanners |
| [HBASE-17785](https://issues.apache.org/jira/browse/HBASE-17785) | RSGroupBasedLoadBalancer fails to assign new table regions when cloning snapshot | Major | . |
| [HBASE-17698](https://issues.apache.org/jira/browse/HBASE-17698) | ReplicationEndpoint choosing sinks | Major | Replication |
| [HBASE-16780](https://issues.apache.org/jira/browse/HBASE-16780) | Since move to protobuf3.1, Cells are limited to 64MB where previous they had no limit | Critical | Protobufs |
| [HBASE-17821](https://issues.apache.org/jira/browse/HBASE-17821) | The CompoundConfiguration#toString is wrong | Trivial | . |
| [HBASE-17660](https://issues.apache.org/jira/browse/HBASE-17660) | HFileSplitter is not being applied during full table restore | Major | . |
| [HBASE-17287](https://issues.apache.org/jira/browse/HBASE-17287) | Master becomes a zombie if filesystem object closes | Blocker | master |
| [HBASE-17807](https://issues.apache.org/jira/browse/HBASE-17807) | correct the value of zookeeper.session.timeout in hbase doc | Trivial | documentation |
| [HBASE-17798](https://issues.apache.org/jira/browse/HBASE-17798) | RpcServer.Listener.Reader can abort due to CancelledKeyException | Major | . |
| [HBASE-17812](https://issues.apache.org/jira/browse/HBASE-17812) | Remove RpcConnection from pool in AbstractRpcClient.cancelConnections | Major | Client, rpc |
| [HBASE-16014](https://issues.apache.org/jira/browse/HBASE-16014) | Get and Put constructor argument lists are divergent | Major | . |
| [HBASE-17582](https://issues.apache.org/jira/browse/HBASE-17582) | Drop page cache hint is broken | Critical | Compaction, io |
| [HBASE-16084](https://issues.apache.org/jira/browse/HBASE-16084) | Clean up the stale references in javadoc | Minor | . |
| [HBASE-17426](https://issues.apache.org/jira/browse/HBASE-17426) | Inconsistent environment variable names for enabling JMX | Major | . |
| [HBASE-17792](https://issues.apache.org/jira/browse/HBASE-17792) | Use a shared thread pool for AtomicityWriter, AtomicGetReader, AtomicScanReader's connections in TestAcidGuarantees | Minor | . |
| [HBASE-17723](https://issues.apache.org/jira/browse/HBASE-17723) | ClientAsyncPrefetchScanner may end prematurely when the size of the cache is one | Major | . |
| [HBASE-17779](https://issues.apache.org/jira/browse/HBASE-17779) | disable\_table\_replication returns misleading message and does not turn off replication | Major | Replication |
| [HBASE-17780](https://issues.apache.org/jira/browse/HBASE-17780) | BoundedByteBufferPool "At capacity" messages are not actionable | Minor | . |
| [HBASE-17501](https://issues.apache.org/jira/browse/HBASE-17501) | NullPointerException after Datanodes Decommissioned and Terminated | Minor | Filesystem Integration, Operability |
| [HBASE-17773](https://issues.apache.org/jira/browse/HBASE-17773) | VerifyReplication tool wrongly emits warning "ERROR: Invalid argument '--recomparesleep=xx'" | Trivial | . |
| [HBASE-17746](https://issues.apache.org/jira/browse/HBASE-17746) | TestSimpleRpcScheduler.testCoDelScheduling is broken | Major | integration tests |
| [HBASE-17772](https://issues.apache.org/jira/browse/HBASE-17772) | IntegrationTestRSGroup won't run | Minor | rsgroup |
| [HBASE-17712](https://issues.apache.org/jira/browse/HBASE-17712) | Remove/Simplify the logic of RegionScannerImpl.handleFileNotFound | Major | regionserver |
| [HBASE-17763](https://issues.apache.org/jira/browse/HBASE-17763) | IPCUtil.wrapException will wrap DoNotRetryIOException with IOException | Major | IPC/RPC |
| [HBASE-17736](https://issues.apache.org/jira/browse/HBASE-17736) | Some options can't be configured by the shell | Minor | . |
| [HBASE-17761](https://issues.apache.org/jira/browse/HBASE-17761) | Test TestRemoveRegionMetrics.testMoveRegion fails intermittently because of race condition | Major | Region Assignment |
| [HBASE-17760](https://issues.apache.org/jira/browse/HBASE-17760) | HDFS Balancer doc is misleading | Minor | documentation |
| [HBASE-17718](https://issues.apache.org/jira/browse/HBASE-17718) | Difference between RS's servername and its ephemeral node cause SSH stop working | Major | . |
| [HBASE-17729](https://issues.apache.org/jira/browse/HBASE-17729) | Missing shortcuts for some useful HCD options | Trivial | shell |
| [HBASE-17717](https://issues.apache.org/jira/browse/HBASE-17717) | Incorrect ZK ACL set for HBase superuser | Critical | security, Zookeeper |
| [HBASE-17460](https://issues.apache.org/jira/browse/HBASE-17460) | enable\_table\_replication can not perform cyclic replication of a table | Critical | Replication |
| [HBASE-16630](https://issues.apache.org/jira/browse/HBASE-16630) | Fragmentation in long running Bucket Cache | Critical | BucketCache |
| [HBASE-17722](https://issues.apache.org/jira/browse/HBASE-17722) | Metrics subsystem stop/start messages add a lot of useless bulk to operational logging | Trivial | metrics |
| [HBASE-17710](https://issues.apache.org/jira/browse/HBASE-17710) | HBase in standalone mode creates directories with 777 permission | Major | regionserver |
| [HBASE-17673](https://issues.apache.org/jira/browse/HBASE-17673) | Monitored RPC Handler not shown in the WebUI | Minor | . |
| [HBASE-17688](https://issues.apache.org/jira/browse/HBASE-17688) | MultiRowRangeFilter not working correctly if given same start and stop RowKey | Minor | . |
| [HBASE-17699](https://issues.apache.org/jira/browse/HBASE-17699) | Fix TestLockProcedure | Blocker | proc-v2 |
| [HBASE-17674](https://issues.apache.org/jira/browse/HBASE-17674) | Major compaction may be cancelled in CompactionChecker | Major | Compaction |
| [HBASE-17682](https://issues.apache.org/jira/browse/HBASE-17682) | Region stuck in merging\_new state indefinitely | Major | . |
| [HBASE-17069](https://issues.apache.org/jira/browse/HBASE-17069) | RegionServer writes invalid META entries for split daughters in some circumstances | Blocker | wal |
| [HBASE-17677](https://issues.apache.org/jira/browse/HBASE-17677) | ServerName parsing from directory name should be more robust to errors from guava's HostAndPort | Major | wal |
| [HBASE-13882](https://issues.apache.org/jira/browse/HBASE-13882) | Fix RegionSplitPolicy section in HBase book | Trivial | documentation |
| [HBASE-17675](https://issues.apache.org/jira/browse/HBASE-17675) | ReplicationEndpoint should choose new sinks if a SaslException occurs | Major | . |
| [HBASE-15328](https://issues.apache.org/jira/browse/HBASE-15328) | Unvalidated Redirect in HMaster | Minor | security |
| [HBASE-17661](https://issues.apache.org/jira/browse/HBASE-17661) | fix the queue length passed to FastPathBalancedQueueRpcExecutor | Minor | . |
| [HBASE-17653](https://issues.apache.org/jira/browse/HBASE-17653) | HBASE-17624 rsgroup synchronizations will (distributed) deadlock | Major | rsgroup |
| [HBASE-17658](https://issues.apache.org/jira/browse/HBASE-17658) | Fix bookkeeping error with max regions for a table | Major | Balancer |
| [HBASE-17421](https://issues.apache.org/jira/browse/HBASE-17421) | Update refguide w.r.t. MOB Sweeper | Major | documentation, mob |
| [HBASE-17649](https://issues.apache.org/jira/browse/HBASE-17649) | REST API for scan should return 410 when table is disabled | Major | . |
| [HBASE-17640](https://issues.apache.org/jira/browse/HBASE-17640) | Unittest error in TestMobCompactor with different timezone | Minor | mob |
| [HBASE-17624](https://issues.apache.org/jira/browse/HBASE-17624) | Address late review of HBASE-6721, rsgroups feature | Major | rsgroup |
| [HBASE-17639](https://issues.apache.org/jira/browse/HBASE-17639) | Do not stop server if ReplicationSourceManager's waitUntilCanBePushed throws InterruptedException | Major | Replication |
| [HBASE-17558](https://issues.apache.org/jira/browse/HBASE-17558) | ZK dumping jsp should escape html | Minor | security, UI |
| [HBASE-9702](https://issues.apache.org/jira/browse/HBASE-9702) | Change unittests that use "table" or "testtable" to use method names. | Major | test |
| [HBASE-17611](https://issues.apache.org/jira/browse/HBASE-17611) | Thrift 2 per-call latency metrics are capped at ~ 2 seconds | Major | metrics, Thrift |
| [HBASE-17603](https://issues.apache.org/jira/browse/HBASE-17603) | REST API for scan should return 404 when table does not exist | Blocker | REST, scan |
| [HBASE-17638](https://issues.apache.org/jira/browse/HBASE-17638) | Remove duplicated initialization of CacheConfig in HRegionServer | Minor | . |
| [HBASE-17622](https://issues.apache.org/jira/browse/HBASE-17622) | Add hbase-metrics package to TableMapReduceUtil | Trivial | mapreduce |
| [HBASE-17616](https://issues.apache.org/jira/browse/HBASE-17616) | Incorrect actions performed by CM | Major | . |
| [HBASE-17105](https://issues.apache.org/jira/browse/HBASE-17105) | Annotate RegionServerObserver | Major | . |
| [HBASE-17381](https://issues.apache.org/jira/browse/HBASE-17381) | ReplicationSourceWorkerThread can die due to unhandled exceptions | Major | Replication |
| [HBASE-17565](https://issues.apache.org/jira/browse/HBASE-17565) | StochasticLoadBalancer may incorrectly skip balancing due to skewed multiplier sum | Critical | . |
| [HBASE-17606](https://issues.apache.org/jira/browse/HBASE-17606) | Fix failing TestRpcControllerFactory introduced by HBASE-17508 | Major | Client, scan |
| [HBASE-17187](https://issues.apache.org/jira/browse/HBASE-17187) | DoNotRetryExceptions from coprocessors should bubble up to the application | Major | . |
| [HBASE-17578](https://issues.apache.org/jira/browse/HBASE-17578) | Thrift per-method metrics should still update in the case of exceptions | Major | Thrift |
| [HBASE-17593](https://issues.apache.org/jira/browse/HBASE-17593) | Fix build with hadoop 3 profile | Major | . |
| [HBASE-17601](https://issues.apache.org/jira/browse/HBASE-17601) | close() in TableRecordReaderImpl assumes the split has started | Minor | hadoop2 |
| [HBASE-17587](https://issues.apache.org/jira/browse/HBASE-17587) | Do not Rethrow DoNotRetryIOException as UnknownScannerException | Major | Coprocessors, regionserver, rpc |
| [HBASE-17581](https://issues.apache.org/jira/browse/HBASE-17581) | mvn clean test -PskipXXXTests does not work properly for some modules | Major | . |
| [HBASE-16621](https://issues.apache.org/jira/browse/HBASE-16621) | HBCK should have -fixHFileLinks | Major | . |
| [HBASE-17522](https://issues.apache.org/jira/browse/HBASE-17522) | RuntimeExceptions from MemoryMXBean should not take down server process | Major | regionserver |
| [HBASE-17197](https://issues.apache.org/jira/browse/HBASE-17197) | hfile does not work in 2.0 | Major | HFile |
| [HBASE-17538](https://issues.apache.org/jira/browse/HBASE-17538) | HDFS.setStoragePolicy() logs errors on local fs | Major | . |
| [HBASE-16785](https://issues.apache.org/jira/browse/HBASE-16785) | We are not running all tests | Major | build, test |
| [HBASE-17540](https://issues.apache.org/jira/browse/HBASE-17540) | Change SASL server GSSAPI callback log line from DEBUG to TRACE in RegionServer to reduce log volumes in DEBUG mode | Minor | regionserver |
| [HBASE-17271](https://issues.apache.org/jira/browse/HBASE-17271) | hbase-thrift QA tests only run one test | Major | . |
| [HBASE-17407](https://issues.apache.org/jira/browse/HBASE-17407) | Correct update of maxFlushedSeqId in HRegion | Major | wal |
| [HBASE-17489](https://issues.apache.org/jira/browse/HBASE-17489) | ClientScanner may send a next request to a RegionScanner which has been exhausted | Critical | Client, scan |
| [HBASE-17357](https://issues.apache.org/jira/browse/HBASE-17357) | PerformanceEvaluation parameters parsing triggers NPE. | Minor | Performance, test |
| [HBASE-17496](https://issues.apache.org/jira/browse/HBASE-17496) | RSGroup shell commands:get\_server\_rsgroup don't work and commands display an incorrect result size | Major | shell |
| [HBASE-17486](https://issues.apache.org/jira/browse/HBASE-17486) | Tighten the contract for batch client methods | Trivial | API |
| [HBASE-17482](https://issues.apache.org/jira/browse/HBASE-17482) | mvcc mechanism fails when using mvccPreAssign | Critical | . |
| [HBASE-17469](https://issues.apache.org/jira/browse/HBASE-17469) | Properly handle empty TableName in TablePermission#readFields and #write | Major | findbugs |
| [HBASE-17475](https://issues.apache.org/jira/browse/HBASE-17475) | Stack overflow in AsyncProcess if retry too much | Major | API, Client |
| [HBASE-17464](https://issues.apache.org/jira/browse/HBASE-17464) | Fix HBaseTestingUtility.getNewDataTestDirOnTestFS to always return a unique path | Minor | test |
| [HBASE-17450](https://issues.apache.org/jira/browse/HBASE-17450) | TablePermission#equals throws NPE after namespace support was added | Major | findbugs |
| [HBASE-17452](https://issues.apache.org/jira/browse/HBASE-17452) | Failed taking snapshot - region Manifest proto-message too large | Major | snapshots |
| [HBASE-17434](https://issues.apache.org/jira/browse/HBASE-17434) | New Synchronization Scheme for Compaction Pipeline | Major | . |
| [HBASE-17445](https://issues.apache.org/jira/browse/HBASE-17445) | Count size of serialized exceptions in checking max result size quota | Major | . |
| [HBASE-17429](https://issues.apache.org/jira/browse/HBASE-17429) | HBase bulkload cannot support HDFS viewFs | Major | . |
| [HBASE-17435](https://issues.apache.org/jira/browse/HBASE-17435) | Call to preCommitStoreFile() hook encounters SaslException in secure deployment | Major | . |
| [HBASE-17430](https://issues.apache.org/jira/browse/HBASE-17430) | dead links in ref guide to class javadocs that moved out of user APIs. | Major | documentation, website |
| [HBASE-17424](https://issues.apache.org/jira/browse/HBASE-17424) | Protect REST client against malicious XML responses. | Major | REST |
| [HBASE-17351](https://issues.apache.org/jira/browse/HBASE-17351) | Enforcer plugin fails with NullPointerException | Critical | build |
| [HBASE-17290](https://issues.apache.org/jira/browse/HBASE-17290) | Potential loss of data for replication of bulk loaded hfiles | Major | . |
| [HBASE-17390](https://issues.apache.org/jira/browse/HBASE-17390) | Online update of configuration for all servers leaves out masters | Major | . |
| [HBASE-17403](https://issues.apache.org/jira/browse/HBASE-17403) | ClientAsyncPrefetchScanner doesn’t load any data if the MaxResultSize is too small | Major | . |
| [HBASE-17387](https://issues.apache.org/jira/browse/HBASE-17387) | Reduce the overhead of exception report in RegionActionResult for multi() | Minor | . |
| [HBASE-17385](https://issues.apache.org/jira/browse/HBASE-17385) | Change usage documentation from bin/hbase to hbase in various tools | Major | . |
| [HBASE-17374](https://issues.apache.org/jira/browse/HBASE-17374) | ZKPermissionWatcher crashed when grant after region close | Critical | regionserver |
| [HBASE-17376](https://issues.apache.org/jira/browse/HBASE-17376) | ClientAsyncPrefetchScanner may fail due to too many rows | Major | . |
| [HBASE-17330](https://issues.apache.org/jira/browse/HBASE-17330) | SnapshotFileCache will always refresh the file cache | Minor | snapshots |
| [HBASE-16663](https://issues.apache.org/jira/browse/HBASE-16663) | JMX ConnectorServer stopped when unauthorized user try to stop HM/RS/cluster | Critical | metrics, security |
| [HBASE-17341](https://issues.apache.org/jira/browse/HBASE-17341) | Add a timeout during replication endpoint termination | Critical | . |
| [HBASE-17328](https://issues.apache.org/jira/browse/HBASE-17328) | Properly dispose of looped replication peers | Critical | Replication |
| [HBASE-17347](https://issues.apache.org/jira/browse/HBASE-17347) | ExportSnapshot may write snapshot info file to wrong directory when specifying target name | Minor | snapshots |
| [HBASE-17344](https://issues.apache.org/jira/browse/HBASE-17344) | The regionserver web UIs miss the coprocessors of RegionServerCoprocessorHost. | Minor | . |
| [HBASE-17333](https://issues.apache.org/jira/browse/HBASE-17333) | HBASE-17294 always ensures CompactingMemstore is default | Critical | . |
| [HBASE-17326](https://issues.apache.org/jira/browse/HBASE-17326) | Fix findbugs warning in BufferedMutatorParams | Major | . |
| [HBASE-17309](https://issues.apache.org/jira/browse/HBASE-17309) | Fix connection leaks in TestAcidGuarantees | Minor | integration tests |
| [HBASE-17297](https://issues.apache.org/jira/browse/HBASE-17297) | Single Filter in parenthesis cannot be parsed correctly | Major | Filters |
| [HBASE-17237](https://issues.apache.org/jira/browse/HBASE-17237) | Override the correct compact method in HMobStore | Major | mob |
| [HBASE-16985](https://issues.apache.org/jira/browse/HBASE-16985) | TestClusterId failed due to wrong hbase rootdir | Minor | test |
| [HBASE-15437](https://issues.apache.org/jira/browse/HBASE-15437) | Response size calculated in RPCServer for warning tooLarge responses does NOT count CellScanner payload | Major | IPC/RPC |
| [HBASE-17256](https://issues.apache.org/jira/browse/HBASE-17256) | Rpc handler monitoring will be removed when the task queue is full | Major | . |
| [HBASE-17170](https://issues.apache.org/jira/browse/HBASE-17170) | HBase is also retrying DoNotRetryIOException because of class loader differences. | Major | . |
| [HBASE-17252](https://issues.apache.org/jira/browse/HBASE-17252) | Wrong arguments for ValueAndTagRewriteCell in CellUtil | Major | . |
| [HBASE-16841](https://issues.apache.org/jira/browse/HBASE-16841) | Data loss in MOB files after cloning a snapshot and deleting that snapshot | Blocker | mob, snapshots |
| [HBASE-17118](https://issues.apache.org/jira/browse/HBASE-17118) | StoreScanner leaked in KeyValueHeap | Major | . |
| [HBASE-17231](https://issues.apache.org/jira/browse/HBASE-17231) | Region#getCellCompartor sp? | Trivial | . |
| [HBASE-16886](https://issues.apache.org/jira/browse/HBASE-16886) | hbase-client: scanner with reversed=true and small=true gets no result | Major | . |
| [HBASE-17112](https://issues.apache.org/jira/browse/HBASE-17112) | Prevent setting timestamp of delta operations the same as previous value's | Major | . |
| [HBASE-16209](https://issues.apache.org/jira/browse/HBASE-16209) | Provide an ExponentialBackOffPolicy sleep between failed region open requests | Major | . |
| [HBASE-17206](https://issues.apache.org/jira/browse/HBASE-17206) | FSHLog may roll a new writer successfully with unflushed entries | Critical | wal |
| [HBASE-17224](https://issues.apache.org/jira/browse/HBASE-17224) | There are lots of spelling errors in the HBase logging and exception messages | Trivial | Client, io, mapreduce, master, regionserver, security, wal |
| [HBASE-17192](https://issues.apache.org/jira/browse/HBASE-17192) | remove use of scala-tools.org from pom | Blocker | spark, website |
| [HBASE-17186](https://issues.apache.org/jira/browse/HBASE-17186) | MasterProcedureTestingUtility#testRecoveryAndDoubleExecution displays stale procedure state info | Minor | proc-v2, test |
| [HBASE-17072](https://issues.apache.org/jira/browse/HBASE-17072) | CPU usage starts to climb up to 90-100% when using G1GC; purge ThreadLocal usage | Critical | Performance, regionserver |
| [HBASE-17116](https://issues.apache.org/jira/browse/HBASE-17116) | [PerformanceEvaluation] Add option to configure block size | Trivial | tooling |
| [HBASE-17127](https://issues.apache.org/jira/browse/HBASE-17127) | Locate region should fail fast if underlying Connection already closed | Major | . |
| [HBASE-17144](https://issues.apache.org/jira/browse/HBASE-17144) | Possible offheap read ByteBuffers leak | Major | rpc |
| [HBASE-17160](https://issues.apache.org/jira/browse/HBASE-17160) | Undo unnecessary inter-module dependency; spark to hbase-it and hbase-it to shell | Minor | . |
| [HBASE-17171](https://issues.apache.org/jira/browse/HBASE-17171) | IntegrationTestTimeBoundedRequestsWithRegionReplicas fails with obtuse error when readers have no time to run | Minor | integration tests |
| [HBASE-17158](https://issues.apache.org/jira/browse/HBASE-17158) | Avoid deadlock caused by HRegion#doDelta | Major | . |
| [HBASE-17166](https://issues.apache.org/jira/browse/HBASE-17166) | ITBLL fails on master unable to find hbase-protocol-shaded content | Major | . |
| [HBASE-17095](https://issues.apache.org/jira/browse/HBASE-17095) | The ClientSimpleScanner keeps retrying if the hfile is corrupt or cannot found | Major | regionserver, scan |
| [HBASE-16989](https://issues.apache.org/jira/browse/HBASE-16989) | RowProcess#postBatchMutate doesn’t be executed before the mvcc transaction completion | Major | . |
| [HBASE-17058](https://issues.apache.org/jira/browse/HBASE-17058) | Lower epsilon used for jitter verification from HBASE-15324 | Major | Compaction |
| [HBASE-17082](https://issues.apache.org/jira/browse/HBASE-17082) | ForeignExceptionUtil isn’t packaged when building shaded protocol with -Pcompile-protobuf | Major | . |
| [HBASE-17091](https://issues.apache.org/jira/browse/HBASE-17091) | IntegrationTestZKAndFSPermissions failed with 'KeeperException$NoNodeException' | Major | . |
| [HBASE-17092](https://issues.apache.org/jira/browse/HBASE-17092) | Both LoadIncrementalHFiles#doBulkLoad() methods should set return value | Major | . |
| [HBASE-17044](https://issues.apache.org/jira/browse/HBASE-17044) | Fix merge failed before creating merged region leaves meta inconsistent | Critical | regionserver |
| [HBASE-17074](https://issues.apache.org/jira/browse/HBASE-17074) | PreCommit job always fails because of OOM | Critical | build |
| [HBASE-16345](https://issues.apache.org/jira/browse/HBASE-16345) | RpcRetryingCallerWithReadReplicas#call() should catch some RegionServer Exceptions | Major | Client |
| [HBASE-17062](https://issues.apache.org/jira/browse/HBASE-17062) | RegionSplitter throws ClassCastException | Minor | util |
| [HBASE-16962](https://issues.apache.org/jira/browse/HBASE-16962) | Add readPoint to preCompactScannerOpen() and preFlushScannerOpen() API | Major | . |
| [HBASE-17039](https://issues.apache.org/jira/browse/HBASE-17039) | SimpleLoadBalancer schedules large amount of invalid region moves | Major | Balancer |
| [HBASE-17020](https://issues.apache.org/jira/browse/HBASE-17020) | keylen in midkey() dont computed correctly | Major | HFile |
| [HBASE-16938](https://issues.apache.org/jira/browse/HBASE-16938) | TableCFsUpdater maybe failed due to no write permission on peerNode | Major | Replication |
| [HBASE-17052](https://issues.apache.org/jira/browse/HBASE-17052) | compile-protobuf profile does not compile protobufs in some modules anymore | Major | . |
| [HBASE-17054](https://issues.apache.org/jira/browse/HBASE-17054) | Compactor#preCreateCoprocScanner should be passed user | Major | . |
| [HBASE-16983](https://issues.apache.org/jira/browse/HBASE-16983) | TestMultiTableSnapshotInputFormat failing with Unable to create region directory: /tmp/... | Minor | test |
| [HBASE-17042](https://issues.apache.org/jira/browse/HBASE-17042) | Remove 'public' keyword from MasterObserver interface | Minor | Coprocessors |
| [HBASE-17033](https://issues.apache.org/jira/browse/HBASE-17033) | LogRoller makes a lot of allocations unnecessarily | Major | . |
| [HBASE-16992](https://issues.apache.org/jira/browse/HBASE-16992) | The usage of mutation from CP is weird. | Minor | . |
| [HBASE-17032](https://issues.apache.org/jira/browse/HBASE-17032) | CallQueueTooBigException and CallDroppedException should not be triggering PFFE | Major | Client |
| [HBASE-16960](https://issues.apache.org/jira/browse/HBASE-16960) | RegionServer hang when aborting | Critical | . |
| [HBASE-14329](https://issues.apache.org/jira/browse/HBASE-14329) | Report region in transition only ever operates on one region | Major | Region Assignment |
| [HBASE-16964](https://issues.apache.org/jira/browse/HBASE-16964) | Successfully archived files are not cleared from compacted store file list if archiving of any file fails | Blocker | regionserver |
| [HBASE-16976](https://issues.apache.org/jira/browse/HBASE-16976) | hbase-protocol-shaded module generates classes to wrong directory | Minor | build |
| [HBASE-16931](https://issues.apache.org/jira/browse/HBASE-16931) | Setting cell's seqId to zero in compaction flow might cause RS down. | Critical | regionserver |
| [HBASE-16980](https://issues.apache.org/jira/browse/HBASE-16980) | TestRowProcessorEndpoint failing consistently | Major | . |
| [HBASE-16966](https://issues.apache.org/jira/browse/HBASE-16966) | Re-enable TestSimpleRpcScheduler#testCoDelScheduling in master branch | Major | test |
| [HBASE-16974](https://issues.apache.org/jira/browse/HBASE-16974) | Update os-maven-plugin to 1.4.1.final+ for building shade file on RHEL/CentOS | Minor | . |
| [HBASE-16971](https://issues.apache.org/jira/browse/HBASE-16971) | The passed durability of Append/Increment isn't used in wal sync | Major | . |
| [HBASE-16743](https://issues.apache.org/jira/browse/HBASE-16743) | TestSimpleRpcScheduler#testCoDelScheduling is broke | Major | rpc |
| [HBASE-16948](https://issues.apache.org/jira/browse/HBASE-16948) | Fix inconsistency between HRegion and Region javadoc on getRowLock | Major | . |
| [HBASE-16949](https://issues.apache.org/jira/browse/HBASE-16949) | Fix RAT License complaint about the hbase-protocol-shaded/src/main/patches content | Major | . |
| [HBASE-16939](https://issues.apache.org/jira/browse/HBASE-16939) | ExportSnapshot: set owner and permission on right directory | Minor | . |
| [HBASE-16000](https://issues.apache.org/jira/browse/HBASE-16000) | Table#checkAndPut() docs are too vague | Minor | documentation |
| [HBASE-16880](https://issues.apache.org/jira/browse/HBASE-16880) | Correct the javadoc/behaviour of the APIs in ByteBufferUtils | Major | . |
| [HBASE-16930](https://issues.apache.org/jira/browse/HBASE-16930) | AssignmentManager#checkWals() function can recur infinitely | Major | Region Assignment |
| [HBASE-16887](https://issues.apache.org/jira/browse/HBASE-16887) | Allow setting different hadoopcheck versions in precommit for different branches | Major | build |
| [HBASE-15684](https://issues.apache.org/jira/browse/HBASE-15684) | Fix the broken log file size accounting | Major | wal |
| [HBASE-16870](https://issues.apache.org/jira/browse/HBASE-16870) | Add the metrics of replication sources which were transformed from other dead rs to ReplicationLoad | Minor | Replication |
| [HBASE-16815](https://issues.apache.org/jira/browse/HBASE-16815) | Low scan ratio in RPC queue tuning triggers divide by zero exception | Major | regionserver, rpc |
| [HBASE-16829](https://issues.apache.org/jira/browse/HBASE-16829) | DemoClient should detect secure mode | Major | . |
| [HBASE-16754](https://issues.apache.org/jira/browse/HBASE-16754) | Regions failing compaction due to referencing non-existent store file | Blocker | . |
| [HBASE-15348](https://issues.apache.org/jira/browse/HBASE-15348) | Fix tests broken by recent metrics re-work | Major | metrics, test |
| [HBASE-16910](https://issues.apache.org/jira/browse/HBASE-16910) | Avoid NPE when starting StochasticLoadBalancer | Minor | Balancer |
| [HBASE-16701](https://issues.apache.org/jira/browse/HBASE-16701) | TestHRegion and TestHRegionWithInMemoryFlush timing out | Major | regionserver, test |
| [HBASE-16889](https://issues.apache.org/jira/browse/HBASE-16889) | Proc-V2: verifyTables in the IntegrationTestDDLMasterFailover test after each table DDL is incorrect | Major | proc-v2 |
| [HBASE-16884](https://issues.apache.org/jira/browse/HBASE-16884) | Add HBase-2.0.x to the hadoop version support matrix in our documentation | Blocker | documentation |
| [HBASE-16752](https://issues.apache.org/jira/browse/HBASE-16752) | Upgrading from 1.2 to 1.3 can lead to replication failures due to difference in RPC size limit | Major | Replication, rpc |
| [HBASE-16578](https://issues.apache.org/jira/browse/HBASE-16578) | Mob data loss after mob compaction and normal compaction | Major | mob |
| [HBASE-16824](https://issues.apache.org/jira/browse/HBASE-16824) | Writer.flush() can be called on already closed streams in WAL roll | Major | wal |
| [HBASE-16866](https://issues.apache.org/jira/browse/HBASE-16866) | Avoid NPE in AsyncRequestFutureImpl#updateStats | Minor | . |
| [HBASE-16733](https://issues.apache.org/jira/browse/HBASE-16733) | add hadoop 3.0.0-alpha1 to precommit checks | Major | build, hadoop3 |
| [HBASE-16283](https://issues.apache.org/jira/browse/HBASE-16283) | Batch Append/Increment will always fail if set ReturnResults to false | Minor | API |
| [HBASE-16712](https://issues.apache.org/jira/browse/HBASE-16712) | fix hadoop-3.0 profile mvn install | Major | build, hadoop3 |
| [HBASE-16721](https://issues.apache.org/jira/browse/HBASE-16721) | Concurrency issue in WAL unflushed seqId tracking | Critical | wal |
| [HBASE-16326](https://issues.apache.org/jira/browse/HBASE-16326) | CellModel / RowModel should override 'equals', 'hashCode' and 'toString' | Trivial | REST |
| [HBASE-16855](https://issues.apache.org/jira/browse/HBASE-16855) | Avoid NPE in MetricsConnection’s construction | Minor | . |
| [HBASE-16856](https://issues.apache.org/jira/browse/HBASE-16856) | Exception message in SyncRunner.run() should print currentSequence | Minor | wal |
| [HBASE-16853](https://issues.apache.org/jira/browse/HBASE-16853) | Regions are assigned to Region Servers in /hbase/draining after HBase Master failover | Major | Balancer, Region Assignment |
| [HBASE-16810](https://issues.apache.org/jira/browse/HBASE-16810) | HBase Balancer throws ArrayIndexOutOfBoundsException when regionservers are in /hbase/draining znode and unloaded | Major | Balancer |
| [HBASE-16664](https://issues.apache.org/jira/browse/HBASE-16664) | Timeout logic in AsyncProcess is broken | Major | . |
| [HBASE-16724](https://issues.apache.org/jira/browse/HBASE-16724) | Snapshot owner can't clone | Major | snapshots |
| [HBASE-16807](https://issues.apache.org/jira/browse/HBASE-16807) | RegionServer will fail to report new active Hmaster until HMaster/RegionServer failover | Major | regionserver |
| [HBASE-16716](https://issues.apache.org/jira/browse/HBASE-16716) | OfflineMetaRepair leaves empty directory inside /hbase/WALs which remains forever | Minor | hbck |
| [HBASE-16746](https://issues.apache.org/jira/browse/HBASE-16746) | The log of “region close” should differ from “region move” | Minor | . |
| [HBASE-16808](https://issues.apache.org/jira/browse/HBASE-16808) | Included the generated, shaded java files from "HBASE-15638 Shade protobuf" in our src assembly | Blocker | . |
| [HBASE-16731](https://issues.apache.org/jira/browse/HBASE-16731) | Inconsistent results from the Get/Scan if we use the empty FilterList | Minor | . |
| [HBASE-16801](https://issues.apache.org/jira/browse/HBASE-16801) | The Append/Increment may return the data from future | Critical | . |
| [HBASE-15109](https://issues.apache.org/jira/browse/HBASE-15109) | HM/RS failed to start when "fs.hdfs.impl.disable.cache" is set to true | Critical | regionserver |
| [HBASE-16622](https://issues.apache.org/jira/browse/HBASE-16622) | Fix some issues with the HBase reference guide | Major | documentation |
| [HBASE-16793](https://issues.apache.org/jira/browse/HBASE-16793) | Exclude shaded protobuf files from rat check | Major | build |
| [HBASE-16699](https://issues.apache.org/jira/browse/HBASE-16699) | Overflows in AverageIntervalRateLimiter's refill() and getWaitInterval() | Major | . |
| [HBASE-16771](https://issues.apache.org/jira/browse/HBASE-16771) | VerifyReplication should increase GOODROWS counter if re-comparison passes | Major | . |
| [HBASE-16768](https://issues.apache.org/jira/browse/HBASE-16768) | Inconsistent results from the Append/Increment | Minor | . |
| [HBASE-16767](https://issues.apache.org/jira/browse/HBASE-16767) | Mob compaction needs to clean up files in /hbase/mobdir/.tmp and /hbase/mobdir/.tmp/.bulkload when running into IO exceptions | Major | mob |
| [HBASE-16681](https://issues.apache.org/jira/browse/HBASE-16681) | Fix flaky TestReplicationSourceManagerZkImpl | Major | . |
| [HBASE-16753](https://issues.apache.org/jira/browse/HBASE-16753) | There is a mismatch between suggested Java version in hbase-env.sh | Minor | scripts |
| [HBASE-16644](https://issues.apache.org/jira/browse/HBASE-16644) | Errors when reading legit HFile Trailer of old (v2.0) format file | Critical | HFile |
| [HBASE-16763](https://issues.apache.org/jira/browse/HBASE-16763) | Remove unintentional dependency on net.sf.ehcache.search.Results | Major | . |
| [HBASE-16764](https://issues.apache.org/jira/browse/HBASE-16764) | hbase-protocol-shaded generate-shaded-classes profile unpacks shaded java files into wrong location | Major | build |
| [HBASE-16739](https://issues.apache.org/jira/browse/HBASE-16739) | Timed out exception message should include encoded region name | Minor | . |
| [HBASE-16678](https://issues.apache.org/jira/browse/HBASE-16678) | MapReduce jobs do not update counters from ScanMetrics | Major | . |
| [HBASE-16732](https://issues.apache.org/jira/browse/HBASE-16732) | Avoid possible NPE in MetaTableLocator | Minor | . |
| [HBASE-16723](https://issues.apache.org/jira/browse/HBASE-16723) | RMI registry is not destroyed after stopping JMX Connector Server | Major | metrics |
| [HBASE-16711](https://issues.apache.org/jira/browse/HBASE-16711) | Fix hadoop-3.0 profile compile | Major | build, hadoop3 |
| [HBASE-16696](https://issues.apache.org/jira/browse/HBASE-16696) | After HBASE-16604 - does not release blocks in case of scanner exception | Critical | . |
| [HBASE-16682](https://issues.apache.org/jira/browse/HBASE-16682) | Fix Shell tests failure. NoClassDefFoundError for MiniKdc | Major | . |
| [HBASE-16660](https://issues.apache.org/jira/browse/HBASE-16660) | ArrayIndexOutOfBounds during the majorCompactionCheck in DateTieredCompaction | Critical | Compaction |
| [HBASE-16643](https://issues.apache.org/jira/browse/HBASE-16643) | Reverse scanner heap creation may not allow MSLAB closure due to improper ref counting of segments | Critical | . |
| [HBASE-16649](https://issues.apache.org/jira/browse/HBASE-16649) | Truncate table with splits preserved can cause both data loss and truncated data appeared again | Major | . |
| [HBASE-16704](https://issues.apache.org/jira/browse/HBASE-16704) | Scan will be broken while working with DBE and KeyValueCodecWithTags | Major | . |
| [HBASE-16645](https://issues.apache.org/jira/browse/HBASE-16645) | Wrong range of Cells is caused by CellFlatMap#tailMap, headMap, and SubMap | Major | . |
| [HBASE-16665](https://issues.apache.org/jira/browse/HBASE-16665) | Check whether KeyValueUtil.createXXX could be replaced by CellUtil without copy | Major | . |
| [HBASE-16697](https://issues.apache.org/jira/browse/HBASE-16697) | bump TestRegionServerMetrics to LargeTests | Trivial | test |
| [HBASE-16679](https://issues.apache.org/jira/browse/HBASE-16679) | Flush throughput controller: Minor perf change and fix flaky TestFlushWithThroughputController | Major | . |
| [HBASE-16693](https://issues.apache.org/jira/browse/HBASE-16693) | The commit of HBASE-16604 creates a unrelated folder | Critical | . |
| [HBASE-16688](https://issues.apache.org/jira/browse/HBASE-16688) | Split TestMasterFailoverWithProcedures | Major | proc-v2, test |
| [HBASE-16604](https://issues.apache.org/jira/browse/HBASE-16604) | Scanner retries on IOException can cause the scans to miss data | Critical | regionserver, Scanners |
| [HBASE-16662](https://issues.apache.org/jira/browse/HBASE-16662) | Fix open POODLE vulnerabilities | Major | REST, Thrift |
| [HBASE-16675](https://issues.apache.org/jira/browse/HBASE-16675) | Average region size may be incorrect when there is region whose RegionLoad cannot be retrieved | Major | . |
| [HBASE-16670](https://issues.apache.org/jira/browse/HBASE-16670) | Make RpcServer#processRequest logic more robust | Minor | . |
| [HBASE-12088](https://issues.apache.org/jira/browse/HBASE-12088) | Remove un-used profiles in non-root poms | Major | . |
| [HBASE-16669](https://issues.apache.org/jira/browse/HBASE-16669) | fix flaky TestAdmin#testmergeRegions | Major | test |
| [HBASE-16294](https://issues.apache.org/jira/browse/HBASE-16294) | hbck reporting "No HDFS region dir found" for replicas | Minor | hbck |
| [HBASE-12949](https://issues.apache.org/jira/browse/HBASE-12949) | Scanner can be stuck in infinite loop if the HFile is corrupted | Major | . |
| [HBASE-16654](https://issues.apache.org/jira/browse/HBASE-16654) | Better handle channelInactive and close for netty rpc client | Major | . |
| [HBASE-16540](https://issues.apache.org/jira/browse/HBASE-16540) | Scan should do additional validation on start and stop row | Major | Client |
| [HBASE-16647](https://issues.apache.org/jira/browse/HBASE-16647) | hbck should do offline reference repair before online repair | Major | . |
| [HBASE-16551](https://issues.apache.org/jira/browse/HBASE-16551) | Cleanup SplitLogManager and CatalogJanitor | Trivial | master |
| [HBASE-16635](https://issues.apache.org/jira/browse/HBASE-16635) | RpcClient under heavy load leaks some netty bytebuf | Minor | . |
| [HBASE-16165](https://issues.apache.org/jira/browse/HBASE-16165) | Decrease RpcServer.callQueueSize before writeResponse causes OOM | Minor | IPC/RPC, rpc |
| [HBASE-16624](https://issues.apache.org/jira/browse/HBASE-16624) | MVCC DeSerialization bug in the HFileScannerImpl | Blocker | HFile |
| [HBASE-16612](https://issues.apache.org/jira/browse/HBASE-16612) | Use array to cache Types for KeyValue.Type.codeToType | Minor | . |
| [HBASE-16491](https://issues.apache.org/jira/browse/HBASE-16491) | A few org.apache.hadoop.hbase.rsgroup classes missing @InterfaceAudience annotation | Minor | API, regionserver |
| [HBASE-16609](https://issues.apache.org/jira/browse/HBASE-16609) | Fake cells EmptyByteBufferedCell created in read path not implementing SettableSequenceId | Major | . |
| [HBASE-16614](https://issues.apache.org/jira/browse/HBASE-16614) | Use daemon thread for netty event loop | Major | IPC/RPC, rpc |
| [HBASE-15624](https://issues.apache.org/jira/browse/HBASE-15624) | Move master branch/hbase-2.0.0 to jdk-8 only | Blocker | build |
| [HBASE-16576](https://issues.apache.org/jira/browse/HBASE-16576) | Shell add\_peer doesn't allow setting cluster\_key for custom endpoints | Major | shell |
| [HBASE-16309](https://issues.apache.org/jira/browse/HBASE-16309) | TestDefaultCompactSelection.testCompactionRatio is flaky | Major | Compaction, test |
| [HBASE-16589](https://issues.apache.org/jira/browse/HBASE-16589) | Adjust log level for FATAL messages from HBaseReplicationEndpoint that are not fatal | Trivial | . |
| [HBASE-16544](https://issues.apache.org/jira/browse/HBASE-16544) | Remove or Clarify 'Using Amazon S3 Storage' section in the reference guide | Major | documentation, Filesystem Integration |
| [HBASE-16572](https://issues.apache.org/jira/browse/HBASE-16572) | Sync method in RecoverableZooKeeper failed to pass callback function in | Minor | Zookeeper |
| [HBASE-16460](https://issues.apache.org/jira/browse/HBASE-16460) | Can't rebuild the BucketAllocator's data structures when BucketCache uses FileIOEngine | Major | BucketCache |
| [HBASE-16556](https://issues.apache.org/jira/browse/HBASE-16556) | The read/write timeout are not used in HTable.delete(List), HTable.get(List), and HTable.existsAll(List) | Minor | . |
| [HBASE-16538](https://issues.apache.org/jira/browse/HBASE-16538) | Version mismatch in HBaseConfiguration.checkDefaultsVersion | Major | . |
| [HBASE-16552](https://issues.apache.org/jira/browse/HBASE-16552) | MiniHBaseCluster#getServerWith() does not ignore stopped RSs | Trivial | test |
| [HBASE-16547](https://issues.apache.org/jira/browse/HBASE-16547) | hbase-archetype-builder shell scripts assume bash is installed in /bin | Trivial | . |
| [HBASE-16375](https://issues.apache.org/jira/browse/HBASE-16375) | Mapreduce mini cluster using HBaseTestingUtility not setting correct resourcemanager and jobhistory webapp address of MapReduceTestingShim | Minor | . |
| [HBASE-16527](https://issues.apache.org/jira/browse/HBASE-16527) | IOExceptions from DFS client still can cause CatalogJanitor to delete referenced files | Major | . |
| [HBASE-15278](https://issues.apache.org/jira/browse/HBASE-15278) | AsyncRPCClient hangs if Connection closes before RPC call response | Blocker | rpc, test |
| [HBASE-16528](https://issues.apache.org/jira/browse/HBASE-16528) | Procedure-V2: ServerCrashProcedure misses owner information | Major | hbase, master, proc-v2 |
| [HBASE-16535](https://issues.apache.org/jira/browse/HBASE-16535) | Use regex to exclude generated classes for findbugs | Major | findbugs |
| [HBASE-16515](https://issues.apache.org/jira/browse/HBASE-16515) | AsyncProcess has incorrent count of tasks if the backoff policy is enabled | Minor | . |
| [HBASE-16490](https://issues.apache.org/jira/browse/HBASE-16490) | Fix race condition between SnapshotManager and SnapshotCleaner | Major | . |
| [HBASE-16409](https://issues.apache.org/jira/browse/HBASE-16409) | Row key for bad row should be properly delimited in VerifyReplication | Minor | . |
| [HBASE-16495](https://issues.apache.org/jira/browse/HBASE-16495) | When accessed via Thrift, all column families have timeToLive equal to -1 | Minor | Thrift |
| [HBASE-16304](https://issues.apache.org/jira/browse/HBASE-16304) | HRegion#RegionScannerImpl#handleFileNotFoundException may lead to deadlock when trying to obtain write lock on updatesLock | Critical | . |
| [HBASE-16270](https://issues.apache.org/jira/browse/HBASE-16270) | Handle duplicate clearing of snapshot in region replicas | Major | Replication |
| [HBASE-16471](https://issues.apache.org/jira/browse/HBASE-16471) | Region Server metrics context will be wrong when machine hostname contain "master" word | Minor | metrics |
| [HBASE-16456](https://issues.apache.org/jira/browse/HBASE-16456) | Fix findbugs warnings in hbase-rsgroup module | Minor | . |
| [HBASE-16464](https://issues.apache.org/jira/browse/HBASE-16464) | archive folder grows bigger and bigger due to corrupt snapshot under tmp dir | Major | snapshots |
| [HBASE-16360](https://issues.apache.org/jira/browse/HBASE-16360) | TableMapReduceUtil addHBaseDependencyJars has the wrong class name for PrefixTreeCodec | Minor | mapreduce |
| [HBASE-16446](https://issues.apache.org/jira/browse/HBASE-16446) | append\_peer\_tableCFs failed when there already have this table's partial cfs in the peer | Minor | Replication |
| [HBASE-16454](https://issues.apache.org/jira/browse/HBASE-16454) | Compactor's shipping logic decision should be based on the current store's block size | Minor | . |
| [HBASE-16444](https://issues.apache.org/jira/browse/HBASE-16444) | CellUtil#estimatedSerializedSizeOfKey() should consider KEY\_INFRASTRUCTURE\_SIZE | Minor | . |
| [HBASE-7621](https://issues.apache.org/jira/browse/HBASE-7621) | REST client (RemoteHTable) doesn't support binary row keys | Major | REST |
| [HBASE-16430](https://issues.apache.org/jira/browse/HBASE-16430) | Fix RegionServer Group's bug when moving multiple tables | Major | master |
| [HBASE-16429](https://issues.apache.org/jira/browse/HBASE-16429) | FSHLog: deadlock if rollWriter called when ring buffer filled with appends | Critical | . |
| [HBASE-16384](https://issues.apache.org/jira/browse/HBASE-16384) | Update report-flakies.py script to allow specifying a list of build ids to be excluded | Major | . |
| [HBASE-15635](https://issues.apache.org/jira/browse/HBASE-15635) | Mean age of Blocks in cache (seconds) on webUI should be greater than zero | Major | . |
| [HBASE-16341](https://issues.apache.org/jira/browse/HBASE-16341) | Missing bit on "Regression: Random Read/WorkloadC slower in 1.x than 0.98" | Major | rpc |
| [HBASE-16267](https://issues.apache.org/jira/browse/HBASE-16267) | Remove commons-httpclient dependency from hbase-rest module | Critical | . |
| [HBASE-16389](https://issues.apache.org/jira/browse/HBASE-16389) | Thread leak in CoprocessorHost#getTable(TableName) API | Major | . |
| [HBASE-16363](https://issues.apache.org/jira/browse/HBASE-16363) | Correct javadoc for qualifier length and value length in Cell interface | Minor | documentation |
| [HBASE-16368](https://issues.apache.org/jira/browse/HBASE-16368) | test\*WhenRegionMove in TestPartialResultsFromClientSide is flaky | Major | Scanners |
| [HBASE-16310](https://issues.apache.org/jira/browse/HBASE-16310) | Revisit the logic of filterRowKey for Filters | Major | . |
| [HBASE-16361](https://issues.apache.org/jira/browse/HBASE-16361) | Revert of HBASE-16317, "revert all ESAPI..." broke TestLogLevel | Major | dependencies, UI |
| [HBASE-16367](https://issues.apache.org/jira/browse/HBASE-16367) | Race between master and region server initialization may lead to premature server abort | Major | . |
| [HBASE-16303](https://issues.apache.org/jira/browse/HBASE-16303) | FilterList with MUST\_PASS\_ONE optimization | Major | Filters |
| [HBASE-15866](https://issues.apache.org/jira/browse/HBASE-15866) | Split hbase.rpc.timeout into \*.read.timeout and \*.write.timeout | Major | . |
| [HBASE-16362](https://issues.apache.org/jira/browse/HBASE-16362) | Mob compaction does not set cacheBlocks to false when creating StoreScanner | Major | Compaction, regionserver |
| [HBASE-16359](https://issues.apache.org/jira/browse/HBASE-16359) | NullPointerException in RSRpcServices.openRegion() | Major | . |
| [HBASE-15461](https://issues.apache.org/jira/browse/HBASE-15461) | ref guide has bad links to blogs originally posted on cloudera website | Major | website |
| [HBASE-15574](https://issues.apache.org/jira/browse/HBASE-15574) | Minor typo on HRegionServerCommandLine.java | Trivial | . |
| [HBASE-16350](https://issues.apache.org/jira/browse/HBASE-16350) | Undo server abort from HBASE-14968 | Major | . |
| [HBASE-16271](https://issues.apache.org/jira/browse/HBASE-16271) | Fix logging and re-run the test in IntegrationTestBulkLoad | Major | . |
| [HBASE-16347](https://issues.apache.org/jira/browse/HBASE-16347) | Unevaluated expressions in book | Major | documentation, website |
| [HBASE-16301](https://issues.apache.org/jira/browse/HBASE-16301) | Trigger flush without waiting when compaction is disabled on a table | Minor | . |
| [HBASE-16319](https://issues.apache.org/jira/browse/HBASE-16319) | Fix TestCacheOnWrite after HBASE-16288 | Trivial | . |
| [HBASE-16315](https://issues.apache.org/jira/browse/HBASE-16315) | RegionSizeCalculator prints region names as binary without escapes | Trivial | . |
| [HBASE-16284](https://issues.apache.org/jira/browse/HBASE-16284) | Unauthorized client can shutdown the cluster | Major | . |
| [HBASE-16296](https://issues.apache.org/jira/browse/HBASE-16296) | Reverse scan performance degrades when using filter lists | Major | Filters |
| [HBASE-16288](https://issues.apache.org/jira/browse/HBASE-16288) | HFile intermediate block level indexes might recurse forever creating multi TB files | Critical | HFile |
| [HBASE-16234](https://issues.apache.org/jira/browse/HBASE-16234) | Expect and handle nulls when assigning replicas | Major | Region Assignment |
| [HBASE-16306](https://issues.apache.org/jira/browse/HBASE-16306) | Add specific imports to avoid namespace clash in defaultSource.scala | Minor | . |
| [HBASE-16300](https://issues.apache.org/jira/browse/HBASE-16300) | LruBlockCache.CACHE\_FIXED\_OVERHEAD should calculate LruBlockCache size correctly | Major | . |
| [HBASE-16289](https://issues.apache.org/jira/browse/HBASE-16289) | AsyncProcess stuck messages need to print region/server | Critical | Operability |
| [HBASE-16096](https://issues.apache.org/jira/browse/HBASE-16096) | Replication keeps accumulating znodes | Major | Replication |
| [HBASE-16293](https://issues.apache.org/jira/browse/HBASE-16293) | TestSnapshotFromMaster#testSnapshotHFileArchiving flakey | Major | test |
| [HBASE-16281](https://issues.apache.org/jira/browse/HBASE-16281) | TestMasterReplication is flaky | Major | . |
| [HBASE-16221](https://issues.apache.org/jira/browse/HBASE-16221) | Thrift server drops connection on long scans | Major | Thrift |
| [HBASE-16272](https://issues.apache.org/jira/browse/HBASE-16272) | Overflow in ServerName's compareTo method | Major | hbase |
| [HBASE-16244](https://issues.apache.org/jira/browse/HBASE-16244) | LocalHBaseCluster start timeout should be configurable | Major | hbase |
| [HBASE-16238](https://issues.apache.org/jira/browse/HBASE-16238) | It's useless to catch SESSIONEXPIRED exception and retry in RecoverableZooKeeper | Minor | Zookeeper |
| [HBASE-16172](https://issues.apache.org/jira/browse/HBASE-16172) | Unify the retry logic in ScannerCallableWithReplicas and RpcRetryingCallerWithReadReplicas | Major | . |
| [HBASE-16110](https://issues.apache.org/jira/browse/HBASE-16110) | AsyncFS WAL doesn't work with Hadoop 2.8+ | Blocker | wal |
| [HBASE-16076](https://issues.apache.org/jira/browse/HBASE-16076) | Cannot configure split policy in HBase shell | Minor | documentation |
| [HBASE-16144](https://issues.apache.org/jira/browse/HBASE-16144) | Replication queue's lock will live forever if RS acquiring the lock has died prematurely | Major | . |
| [HBASE-16235](https://issues.apache.org/jira/browse/HBASE-16235) | TestSnapshotFromMaster#testSnapshotHFileArchiving will fail if there are too many hfiles | Trivial | . |
| [HBASE-16183](https://issues.apache.org/jira/browse/HBASE-16183) | Correct errors in example programs of coprocessor in Ref Guide | Minor | documentation |
| [HBASE-16095](https://issues.apache.org/jira/browse/HBASE-16095) | Add priority to TableDescriptor and priority region open thread pool | Major | . |
| [HBASE-16227](https://issues.apache.org/jira/browse/HBASE-16227) | [Shell] Column value formatter not working in scans | Major | . |
| [HBASE-16211](https://issues.apache.org/jira/browse/HBASE-16211) | JMXCacheBuster restarting the metrics system might cause tests to hang | Major | . |
| [HBASE-16150](https://issues.apache.org/jira/browse/HBASE-16150) | Remove ConcurrentIndex | Major | . |
| [HBASE-16207](https://issues.apache.org/jira/browse/HBASE-16207) | can't restore snapshot without "Admin" permission | Major | master, snapshots |
| [HBASE-16184](https://issues.apache.org/jira/browse/HBASE-16184) | Shell test fails due to rLoadSink being nil | Major | . |
| [HBASE-16055](https://issues.apache.org/jira/browse/HBASE-16055) | PutSortReducer loses any Visibility/acl attribute set on the Puts | Critical | security |
| [HBASE-16081](https://issues.apache.org/jira/browse/HBASE-16081) | Replication remove\_peer gets stuck and blocks WAL rolling | Blocker | regionserver, Replication |
| [HBASE-16044](https://issues.apache.org/jira/browse/HBASE-16044) | Fix 'hbase shell' output parsing in graceful\_stop.sh | Critical | scripts, shell |
| [HBASE-16160](https://issues.apache.org/jira/browse/HBASE-16160) | Get the UnsupportedOperationException when using delegation token with encryption | Blocker | . |
| [HBASE-16074](https://issues.apache.org/jira/browse/HBASE-16074) | ITBLL fails, reports lost big or tiny families | Blocker | integration tests |
| [HBASE-16201](https://issues.apache.org/jira/browse/HBASE-16201) | NPE in RpcServer causing intermittent UT failure of TestMasterReplication#testHFileCyclicReplication | Major | . |
| [HBASE-16171](https://issues.apache.org/jira/browse/HBASE-16171) | Fix the potential problems in TestHCM.testConnectionCloseAllowsInterrupt | Major | . |
| [HBASE-15925](https://issues.apache.org/jira/browse/HBASE-15925) | compat-module maven variable not evaluated | Blocker | build |
| [HBASE-16187](https://issues.apache.org/jira/browse/HBASE-16187) | Fix typo in blog post for metrics2 | Major | website |
| [HBASE-16190](https://issues.apache.org/jira/browse/HBASE-16190) | IntegrationTestDDLMasterFailover failed with IllegalArgumentException: n must be positive | Minor | . |
| [HBASE-16182](https://issues.apache.org/jira/browse/HBASE-16182) | Increase IntegrationTestRpcClient timeout | Major | . |
| [HBASE-16157](https://issues.apache.org/jira/browse/HBASE-16157) | The incorrect block cache count and size are caused by removing duplicate block key in the LruBlockCache | Trivial | . |
| [HBASE-16177](https://issues.apache.org/jira/browse/HBASE-16177) | In dev mode thrift server can't be run | Major | . |
| [HBASE-16091](https://issues.apache.org/jira/browse/HBASE-16091) | Canary takes lot more time when there are delete markers in the table | Major | canary |
| [HBASE-16132](https://issues.apache.org/jira/browse/HBASE-16132) | Scan does not return all the result when regionserver is busy | Major | Client |
| [HBASE-16135](https://issues.apache.org/jira/browse/HBASE-16135) | PeerClusterZnode under rs of removed peer may never be deleted | Major | Replication |
| [HBASE-15844](https://issues.apache.org/jira/browse/HBASE-15844) | We should respect hfile.block.index.cacheonwrite when write intermediate index Block | Major | . |
| [HBASE-16159](https://issues.apache.org/jira/browse/HBASE-16159) | OutOfMemory exception when using AsyncRpcClient with encryption to read rpc response | Major | . |
| [HBASE-16125](https://issues.apache.org/jira/browse/HBASE-16125) | RegionMover uses hardcoded, Unix-style tmp folder - breaks Windows | Major | . |
| [HBASE-16133](https://issues.apache.org/jira/browse/HBASE-16133) | RSGroupBasedLoadBalancer.retainAssignment() might miss a region | Major | . |
| [HBASE-16129](https://issues.apache.org/jira/browse/HBASE-16129) | check\_compatibility.sh is broken when using Java API Compliance Checker v1.7 | Major | test |
| [HBASE-15976](https://issues.apache.org/jira/browse/HBASE-15976) | RegionServerMetricsWrapperRunnable will be failure when disable blockcache. | Major | . |
| [HBASE-16122](https://issues.apache.org/jira/browse/HBASE-16122) | PerformanceEvaluation should provide user friendly hint when client threads argument is missing | Minor | . |
| [HBASE-16069](https://issues.apache.org/jira/browse/HBASE-16069) | Typo "trapsparently" in item 3 of chapter 87.2 of Reference Guide | Minor | documentation |
| [HBASE-16109](https://issues.apache.org/jira/browse/HBASE-16109) | Add Interface audience annotation to a few classes | Minor | . |
| [HBASE-16111](https://issues.apache.org/jira/browse/HBASE-16111) | Truncate preserve shell command is broken | Major | shell |
| [HBASE-16103](https://issues.apache.org/jira/browse/HBASE-16103) | Procedure v2 - TestCloneSnapshotProcedure relies on execution order | Minor | proc-v2, test |
| [HBASE-16040](https://issues.apache.org/jira/browse/HBASE-16040) | Remove configuration "hbase.replication" | Major | . |
| [HBASE-16070](https://issues.apache.org/jira/browse/HBASE-16070) | Mapreduce Serialization classes do not have Interface audience | Major | . |
| [HBASE-16012](https://issues.apache.org/jira/browse/HBASE-16012) | Major compaction can't work due to obsolete scanner read point in RegionServer | Major | Compaction, Scanners |
| [HBASE-16062](https://issues.apache.org/jira/browse/HBASE-16062) | Improper error handling in WAL Reader/Writer creation | Major | . |
| [HBASE-16032](https://issues.apache.org/jira/browse/HBASE-16032) | Possible memory leak in StoreScanner | Major | . |
| [HBASE-16035](https://issues.apache.org/jira/browse/HBASE-16035) | Nested AutoCloseables might not all get closed | Major | . |
| [HBASE-15783](https://issues.apache.org/jira/browse/HBASE-15783) | AccessControlConstants#OP\_ATTRIBUTE\_ACL\_STRATEGY\_CELL\_FIRST not used any more. | Major | . |
| [HBASE-16059](https://issues.apache.org/jira/browse/HBASE-16059) | Region normalizer fails to trigger merge action where one of the regions is empty | Major | master |
| [HBASE-14485](https://issues.apache.org/jira/browse/HBASE-14485) | ConnectionImplementation leaks on construction failure | Major | Client |
| [HBASE-16054](https://issues.apache.org/jira/browse/HBASE-16054) | OutOfMemory exception when using AsyncRpcClient with encryption | Major | . |
| [HBASE-16066](https://issues.apache.org/jira/browse/HBASE-16066) | Resolve RpC\_REPEATED\_CONDITIONAL\_TEST findbugs warnings in HMaster | Major | . |
| [HBASE-16058](https://issues.apache.org/jira/browse/HBASE-16058) | TestHRegion fails on 1.4 builds | Major | test |
| [HBASE-15467](https://issues.apache.org/jira/browse/HBASE-15467) | Remove 1.x/2.0 TableDescriptor incompatibility | Major | master, regionserver |
| [HBASE-16061](https://issues.apache.org/jira/browse/HBASE-16061) | Allow logging to a buffered console | Major | . |
| [HBASE-16053](https://issues.apache.org/jira/browse/HBASE-16053) | Master code is not setting the table in ENABLING state in create table | Major | . |
| [HBASE-16045](https://issues.apache.org/jira/browse/HBASE-16045) | endtime argument for VerifyReplication was incorrectly specified in usage | Major | . |
| [HBASE-15977](https://issues.apache.org/jira/browse/HBASE-15977) | Failed variable substitution on home page | Major | website |
| [HBASE-16047](https://issues.apache.org/jira/browse/HBASE-16047) | TestFastFail is broken again | Major | test |
| [HBASE-15908](https://issues.apache.org/jira/browse/HBASE-15908) | Checksum verification is broken due to incorrect passing of ByteBuffers in DataChecksum | Blocker | HFile |
| [HBASE-16031](https://issues.apache.org/jira/browse/HBASE-16031) | Documents about "hbase.replication" default value seems wrong | Major | documentation |
| [HBASE-16017](https://issues.apache.org/jira/browse/HBASE-16017) | HBase TableOutputFormat has connection leak in getRecordWriter | Major | mapreduce |
| [HBASE-15746](https://issues.apache.org/jira/browse/HBASE-15746) | Remove extra RegionCoprocessor preClose() in RSRpcServices#closeRegion | Minor | Coprocessors, regionserver |
| [HBASE-16021](https://issues.apache.org/jira/browse/HBASE-16021) | graceful\_stop.sh: Wrap variables in double quote to avoid "[: too many arguments" error | Minor | scripts |
| [HBASE-16016](https://issues.apache.org/jira/browse/HBASE-16016) | AssignmentManager#waitForAssignment could have unexpected negative deadline | Major | . |
| [HBASE-16007](https://issues.apache.org/jira/browse/HBASE-16007) | Job's Configuration should be passed to TableMapReduceUtil#addDependencyJars() in WALPlayer | Major | . |
| [HBASE-14644](https://issues.apache.org/jira/browse/HBASE-14644) | Region in transition metric is broken | Major | . |
| [HBASE-15946](https://issues.apache.org/jira/browse/HBASE-15946) | Eliminate possible security concerns in RS web UI's store file metrics | Major | . |
| [HBASE-15990](https://issues.apache.org/jira/browse/HBASE-15990) | The priority value of subsequent coprocessors in the Coprocessor.Priority.SYSTEM list are not incremented by one | Minor | . |
| [HBASE-15952](https://issues.apache.org/jira/browse/HBASE-15952) | Bulk load data replication is not working when RS user does not have permission on hfile-refs node | Major | Replication |
| [HBASE-15975](https://issues.apache.org/jira/browse/HBASE-15975) | logic in TestHTableDescriptor#testAddCoprocessorWithSpecStr is wrong | Trivial | test |
| [HBASE-15959](https://issues.apache.org/jira/browse/HBASE-15959) | Fix flaky test TestRegionServerMetrics.testMobMetrics | Major | . |
| [HBASE-15957](https://issues.apache.org/jira/browse/HBASE-15957) | RpcClientImpl.close never ends in some circumstances | Major | Client, rpc |
| [HBASE-15803](https://issues.apache.org/jira/browse/HBASE-15803) | ZooKeeperWatcher's constructor can leak a ZooKeeper instance with throwing ZooKeeperConnectionException when canCreateBaseZNode is true | Minor | . |
| [HBASE-15698](https://issues.apache.org/jira/browse/HBASE-15698) | Increment TimeRange not serialized to server | Blocker | . |
| [HBASE-15965](https://issues.apache.org/jira/browse/HBASE-15965) | Shell test changes. Use @shell.command instead directly calling functions in admin.rb and other libraries. | Major | . |
| [HBASE-15954](https://issues.apache.org/jira/browse/HBASE-15954) | REST server should log requests with TRACE instead of DEBUG | Major | . |
| [HBASE-15889](https://issues.apache.org/jira/browse/HBASE-15889) | String case conversions are locale-sensitive, used without locale | Minor | localization |
| [HBASE-15955](https://issues.apache.org/jira/browse/HBASE-15955) | Disable action in CatalogJanitor#setEnabled should wait for active cleanup scan to finish | Major | master |
| [HBASE-15929](https://issues.apache.org/jira/browse/HBASE-15929) | There are two classes with name TestRegionServerMetrics | Major | . |
| [HBASE-15845](https://issues.apache.org/jira/browse/HBASE-15845) | Shell Cleanup : move formatter to commands.rb; move one of the two hbase.rb to hbase\_constants.rb | Minor | shell |
| [HBASE-15933](https://issues.apache.org/jira/browse/HBASE-15933) | NullPointerException may be thrown from SimpleRegionNormalizer#getRegionSize() | Major | . |
| [HBASE-15938](https://issues.apache.org/jira/browse/HBASE-15938) | submit-patch.py: Don't crash if there are tests with same name. Refactor: Split out html template to separate file. | Major | . |
| [HBASE-15944](https://issues.apache.org/jira/browse/HBASE-15944) | Spark test flooding mvn output. Redirect test logs to file. | Major | . |
| [HBASE-15858](https://issues.apache.org/jira/browse/HBASE-15858) | Some region server group shell commands don't work | Major | . |
| [HBASE-15932](https://issues.apache.org/jira/browse/HBASE-15932) | Shell test fails due to uninitialized constant | Major | . |
| [HBASE-15907](https://issues.apache.org/jira/browse/HBASE-15907) | Missing documentation of create table split options | Major | documentation |
| [HBASE-15918](https://issues.apache.org/jira/browse/HBASE-15918) | Cleanup excludes/includes file after use in hbase-personality.sh to avoid asf license error. | Major | . |
| [HBASE-15897](https://issues.apache.org/jira/browse/HBASE-15897) | Fix a wrong comment about QOS order | Trivial | . |
| [HBASE-15909](https://issues.apache.org/jira/browse/HBASE-15909) | Use Yetus' patch naming rules in submit-patch.py | Major | . |
| [HBASE-15912](https://issues.apache.org/jira/browse/HBASE-15912) | REST module has 2 extant results in findbugs | Major | . |
| [HBASE-15891](https://issues.apache.org/jira/browse/HBASE-15891) | Closeable resources potentially not getting closed if exception is thrown | Minor | . |
| [HBASE-15693](https://issues.apache.org/jira/browse/HBASE-15693) | Reconsider the ImportOrder rule of checkstyle | Major | build |
| [HBASE-11625](https://issues.apache.org/jira/browse/HBASE-11625) | Reading datablock throws "Invalid HFile block magic" and can not switch to hdfs checksum | Major | HFile |
| [HBASE-15830](https://issues.apache.org/jira/browse/HBASE-15830) | Sasl encryption doesn't work with AsyncRpcChannelImpl | Major | . |
| [HBASE-15884](https://issues.apache.org/jira/browse/HBASE-15884) | NPE in StoreFileScanner#skipKVsNewerThanReadpoint during reverse scan | Major | Scanners |
| [HBASE-15880](https://issues.apache.org/jira/browse/HBASE-15880) | RpcClientImpl#tracedWriteRequest incorrectly closes HTrace span | Major | tracing |
| [HBASE-14818](https://issues.apache.org/jira/browse/HBASE-14818) | user\_permission does not list namespace permissions | Minor | hbase |
| [HBASE-15856](https://issues.apache.org/jira/browse/HBASE-15856) | Cached Connection instances can wind up with addresses never resolved | Critical | Client |
| [HBASE-15863](https://issues.apache.org/jira/browse/HBASE-15863) | Typo in Put.java class documentation | Trivial | documentation, java |
| [HBASE-15465](https://issues.apache.org/jira/browse/HBASE-15465) | userPermission returned by getUserPermission() for the selected namespace does not have namespace set | Minor | Protobufs |
| [HBASE-15617](https://issues.apache.org/jira/browse/HBASE-15617) | Canary in regionserver mode might not enumerate all regionservers | Minor | . |
| [HBASE-15850](https://issues.apache.org/jira/browse/HBASE-15850) | Localize the configuration change in testCheckTableLocks to reduce flakiness of TestHBaseFsck test suite | Major | hbck |
| [HBASE-15841](https://issues.apache.org/jira/browse/HBASE-15841) | Performance Evaluation tool total rows may not be set correctly | Minor | . |
| [HBASE-15824](https://issues.apache.org/jira/browse/HBASE-15824) | LocalHBaseCluster gets bind exception in master info port | Major | . |
| [HBASE-15784](https://issues.apache.org/jira/browse/HBASE-15784) | Misuse core/maxPoolSize of LinkedBlockingQueue in ThreadPoolExecutor | Major | Client, Replication, Thrift |
| [HBASE-15834](https://issues.apache.org/jira/browse/HBASE-15834) | Correct Bloom filter documentation in section 96.4 of Reference Guide | Minor | documentation |
| [HBASE-15769](https://issues.apache.org/jira/browse/HBASE-15769) | Perform validation on cluster key for add\_peer | Minor | . |
| [HBASE-15848](https://issues.apache.org/jira/browse/HBASE-15848) | Fix possible null point dereference in RSGroupBasedLoadBalancer#getMisplacedRegions() | Trivial | regionserver |
| [HBASE-15840](https://issues.apache.org/jira/browse/HBASE-15840) | WAL.proto compilation broken for cpp | Major | . |
| [HBASE-15725](https://issues.apache.org/jira/browse/HBASE-15725) | make\_patch.sh should add the branch name when -b is passed. | Major | tooling |
| [HBASE-15828](https://issues.apache.org/jira/browse/HBASE-15828) | fix extant findbug | Major | findbugs |
| [HBASE-15615](https://issues.apache.org/jira/browse/HBASE-15615) | Wrong sleep time when RegionServerCallable need retry | Major | Client |
| [HBASE-15811](https://issues.apache.org/jira/browse/HBASE-15811) | Batch Get after batch Put does not fetch all Cells | Blocker | Client |
| [HBASE-15742](https://issues.apache.org/jira/browse/HBASE-15742) | Reduce allocation of objects in metrics | Major | . |
| [HBASE-15799](https://issues.apache.org/jira/browse/HBASE-15799) | Two Shell 'close\_region' Example Syntaxes Don't Work | Minor | shell |
| [HBASE-15801](https://issues.apache.org/jira/browse/HBASE-15801) | Upgrade checkstyle for all branches | Major | build |
| [HBASE-15797](https://issues.apache.org/jira/browse/HBASE-15797) | TestIPCUtil fails after HBASE-15795 | Major | . |
| [HBASE-15236](https://issues.apache.org/jira/browse/HBASE-15236) | Inconsistent cell reads over multiple bulk-loaded HFiles | Major | . |
| [HBASE-15807](https://issues.apache.org/jira/browse/HBASE-15807) | Update report-flakies.py to look for "FAILED" status in test report | Minor | . |
| [HBASE-15738](https://issues.apache.org/jira/browse/HBASE-15738) | Ensure artifacts in project dist area include required md5 file | Blocker | build, community |
| [HBASE-15796](https://issues.apache.org/jira/browse/HBASE-15796) | TestMetaCache fails after HBASE-15745 | Major | . |
| [HBASE-15781](https://issues.apache.org/jira/browse/HBASE-15781) | Remove unused TableEventHandler and TotesHRegionInfo | Trivial | master |
| [HBASE-15782](https://issues.apache.org/jira/browse/HBASE-15782) | TestShell fails due to some moved types | Major | . |
| [HBASE-15669](https://issues.apache.org/jira/browse/HBASE-15669) | HFile size is not considered correctly in a replication request | Major | Replication |
| [HBASE-15292](https://issues.apache.org/jira/browse/HBASE-15292) | Refined ZooKeeperWatcher to prevent ZooKeeper's callback while construction | Minor | Zookeeper |
| [HBASE-15563](https://issues.apache.org/jira/browse/HBASE-15563) | 'counter' may overflow in BoundedGroupingStrategy | Minor | wal |
| [HBASE-15755](https://issues.apache.org/jira/browse/HBASE-15755) | SnapshotDescriptionUtils and SnapshotTestingUtils do not have any Interface audience marked | Major | . |
| [HBASE-15741](https://issues.apache.org/jira/browse/HBASE-15741) | Provide backward compatibility for HBase coprocessor service names | Blocker | Coprocessors |
| [HBASE-15613](https://issues.apache.org/jira/browse/HBASE-15613) | TestNamespaceCommand times out | Major | . |
| [HBASE-15528](https://issues.apache.org/jira/browse/HBASE-15528) | Clean up outdated entries in hbase-default.xml | Minor | . |
| [HBASE-15752](https://issues.apache.org/jira/browse/HBASE-15752) | ClassNotFoundException is encountered when custom WAL codec is not found in WALPlayer job | Major | . |
| [HBASE-15714](https://issues.apache.org/jira/browse/HBASE-15714) | We are calling checkRow() twice in doMiniBatchMutation() | Major | regionserver |
| [HBASE-15703](https://issues.apache.org/jira/browse/HBASE-15703) | Deadline scheduler needs to return to the client info about skipped calls, not just drop them | Critical | IPC/RPC |
| [HBASE-15357](https://issues.apache.org/jira/browse/HBASE-15357) | TableInputFormatBase getSplitKey does not handle signed bytes correctly | Major | mapreduce |
| [HBASE-15711](https://issues.apache.org/jira/browse/HBASE-15711) | Add client side property to allow logging details for batch errors | Major | . |
| [HBASE-15732](https://issues.apache.org/jira/browse/HBASE-15732) | hbase-rsgroups should be in the assembly | Major | . |
| [HBASE-15676](https://issues.apache.org/jira/browse/HBASE-15676) | FuzzyRowFilter fails and matches all the rows in the table if the mask consists of all 0s | Major | Filters |
| [HBASE-15697](https://issues.apache.org/jira/browse/HBASE-15697) | Excessive TestHRegion running time on branch-1 | Major | . |
| [HBASE-15685](https://issues.apache.org/jira/browse/HBASE-15685) | Typo in REST documentation | Minor | documentation |
| [HBASE-15708](https://issues.apache.org/jira/browse/HBASE-15708) | Docker for dev-support scripts | Major | . |
| [HBASE-15707](https://issues.apache.org/jira/browse/HBASE-15707) | ImportTSV bulk output does not support tags with hfile.format.version=3 | Major | mapreduce |
| [HBASE-15645](https://issues.apache.org/jira/browse/HBASE-15645) | hbase.rpc.timeout is not used in operations of HTable | Critical | . |
| [HBASE-15634](https://issues.apache.org/jira/browse/HBASE-15634) | TestDateTieredCompactionPolicy#negativeForMajor is flaky | Major | test |
| [HBASE-15710](https://issues.apache.org/jira/browse/HBASE-15710) | Include issue servers information in RetriesExhaustedWithDetailsException message | Minor | . |
| [HBASE-14252](https://issues.apache.org/jira/browse/HBASE-14252) | RegionServers fail to start when setting hbase.ipc.server.callqueue.scan.ratio to 0 | Major | regionserver |
| [HBASE-15699](https://issues.apache.org/jira/browse/HBASE-15699) | Can not sync AsyncFSWAL if no edit is appended | Major | wal |
| [HBASE-15360](https://issues.apache.org/jira/browse/HBASE-15360) | Fix flaky TestSimpleRpcScheduler | Critical | test |
| [HBASE-15670](https://issues.apache.org/jira/browse/HBASE-15670) | Add missing Snapshot.proto to the maven profile for compiling protobuf | Major | . |
| [HBASE-15674](https://issues.apache.org/jira/browse/HBASE-15674) | HRegionLocator#getAllRegionLocations should put the results in cache | Major | . |
| [HBASE-15672](https://issues.apache.org/jira/browse/HBASE-15672) | hadoop.hbase.security.visibility.TestVisibilityLabelsWithDeletes fails | Major | test |
| [HBASE-15673](https://issues.apache.org/jira/browse/HBASE-15673) | [PE tool] Fix latency metrics for multiGet | Major | Performance |
| [HBASE-14898](https://issues.apache.org/jira/browse/HBASE-14898) | Correct Bloom filter documentation in the book | Minor | . |
| [HBASE-15664](https://issues.apache.org/jira/browse/HBASE-15664) | Use Long.MAX\_VALUE instead of HConstants.FOREVER in CompactionPolicy | Major | Compaction |
| [HBASE-15668](https://issues.apache.org/jira/browse/HBASE-15668) | HFileReplicator$Copier fails to replicate other hfiles in the request when a hfile in not found in FS anywhere | Trivial | Replication |
| [HBASE-15287](https://issues.apache.org/jira/browse/HBASE-15287) | mapreduce.RowCounter returns incorrect result with binary row key inputs | Major | mapreduce, util |
| [HBASE-15187](https://issues.apache.org/jira/browse/HBASE-15187) | Integrate CSRF prevention filter to REST gateway | Major | . |
| [HBASE-15650](https://issues.apache.org/jira/browse/HBASE-15650) | Remove TimeRangeTracker as point of contention when many threads reading a StoreFile | Major | Performance |
| [HBASE-15622](https://issues.apache.org/jira/browse/HBASE-15622) | Superusers does not consider the keytab credentials | Critical | security |
| [HBASE-15405](https://issues.apache.org/jira/browse/HBASE-15405) | Synchronize final results logging single thread in PE, fix wrong defaults in help message | Minor | Performance |
| [HBASE-15504](https://issues.apache.org/jira/browse/HBASE-15504) | Fix Balancer in 1.3 not moving regions off overloaded regionserver | Major | . |
| [HBASE-15637](https://issues.apache.org/jira/browse/HBASE-15637) | TSHA Thrift-2 server should allow limiting call queue size | Major | Thrift |
| [HBASE-15639](https://issues.apache.org/jira/browse/HBASE-15639) | Unguarded access to stackIndexes in Procedure#toStringDetails() | Minor | . |
| [HBASE-15636](https://issues.apache.org/jira/browse/HBASE-15636) | hard coded wait time out value in HBaseTestingUtility#waitUntilAllRegionsAssigned might cause test failure | Minor | integration tests, test |
| [HBASE-15621](https://issues.apache.org/jira/browse/HBASE-15621) | Suppress Hbase SnapshotHFile cleaner error messages when a snaphot is going on | Minor | snapshots |
| [HBASE-15627](https://issues.apache.org/jira/browse/HBASE-15627) | Miss space and closing quote in AccessController#checkSystemOrSuperUser | Minor | security |
| [HBASE-15093](https://issues.apache.org/jira/browse/HBASE-15093) | Replication can report incorrect size of log queue for the global source when multiwal is enabled | Minor | Replication |
| [HBASE-15591](https://issues.apache.org/jira/browse/HBASE-15591) | ServerCrashProcedure not yielding | Major | . |
| [HBASE-15623](https://issues.apache.org/jira/browse/HBASE-15623) | Update refguide to change hadoop \<= 2.3.x from NT to X for hbase-1.2.x | Major | documentation |
| [HBASE-15587](https://issues.apache.org/jira/browse/HBASE-15587) | FSTableDescriptors.getDescriptor() logs stack trace erronously | Major | . |
| [HBASE-15485](https://issues.apache.org/jira/browse/HBASE-15485) | Filter.reset() should not be called between batches | Major | . |
| [HBASE-15578](https://issues.apache.org/jira/browse/HBASE-15578) | Handle HBASE-15234 for ReplicationHFileCleaner | Major | Replication |
| [HBASE-15582](https://issues.apache.org/jira/browse/HBASE-15582) | SnapshotManifestV1 too verbose when there are no regions | Trivial | master, snapshots |
| [HBASE-15424](https://issues.apache.org/jira/browse/HBASE-15424) | Add bulk load hfile-refs for replication in ZK after the event is appended in the WAL | Minor | Replication |
| [HBASE-15234](https://issues.apache.org/jira/browse/HBASE-15234) | ReplicationLogCleaner can abort due to transient ZK issues | Critical | master, Replication |
| [HBASE-15567](https://issues.apache.org/jira/browse/HBASE-15567) | TestReplicationShell broken by recent replication changes | Minor | Replication, shell |
| [HBASE-15324](https://issues.apache.org/jira/browse/HBASE-15324) | Jitter may cause desiredMaxFileSize overflow in ConstantSizeRegionSplitPolicy and trigger unexpected split | Major | . |
| [HBASE-15566](https://issues.apache.org/jira/browse/HBASE-15566) | Add timeouts on TestMobFlushSnapshotFromClient and TestRegionMergeTransactionOnCluster | Major | . |
| [HBASE-15559](https://issues.apache.org/jira/browse/HBASE-15559) | BaseMasterAndRegionObserver doesn't implement all the methods | Major | . |
| [HBASE-15327](https://issues.apache.org/jira/browse/HBASE-15327) | Canary will always invoke admin.balancer() in each sniffing period when writeSniffing is enabled | Minor | canary |
| [HBASE-15295](https://issues.apache.org/jira/browse/HBASE-15295) | MutateTableAccess.multiMutate() does not get high priority causing a deadlock | Major | . |
| [HBASE-15515](https://issues.apache.org/jira/browse/HBASE-15515) | Improve LocalityBasedCandidateGenerator in Balancer | Minor | . |
| [HBASE-14256](https://issues.apache.org/jira/browse/HBASE-14256) | Flush task message may be confusing when region is recovered | Major | regionserver |
| [HBASE-15520](https://issues.apache.org/jira/browse/HBASE-15520) | Fix broken TestAsyncIPC | Major | . |
| [HBASE-15064](https://issues.apache.org/jira/browse/HBASE-15064) | BufferUnderflowException after last Cell fetched from an HFile Block served from L2 offheap cache | Critical | io |
| [HBASE-15325](https://issues.apache.org/jira/browse/HBASE-15325) | ResultScanner allowing partial result will miss the rest of the row if the region is moved between two rpc requests | Critical | dataloss, Scanners |
| [HBASE-15433](https://issues.apache.org/jira/browse/HBASE-15433) | SnapshotManager#restoreSnapshot not update table and region count quota correctly when encountering exception | Major | snapshots |
| [HBASE-15441](https://issues.apache.org/jira/browse/HBASE-15441) | Fix WAL splitting when region has moved multiple times | Blocker | Recovery, wal |
| [HBASE-15430](https://issues.apache.org/jira/browse/HBASE-15430) | Failed taking snapshot - Manifest proto-message too large | Critical | snapshots |
| [HBASE-15463](https://issues.apache.org/jira/browse/HBASE-15463) | Region normalizer should check whether split/merge is enabled | Minor | . |
| [HBASE-15439](https://issues.apache.org/jira/browse/HBASE-15439) | getMaximumAllowedTimeBetweenRuns in ScheduledChore ignores the TimeUnit | Major | master, mob, regionserver |
| [HBASE-15379](https://issues.apache.org/jira/browse/HBASE-15379) | Fake cells created in read path not implementing SettableSequenceId | Major | . |
| [HBASE-15425](https://issues.apache.org/jira/browse/HBASE-15425) | Failing to write bulk load event marker in the WAL is ignored | Major | . |
| [HBASE-15378](https://issues.apache.org/jira/browse/HBASE-15378) | Scanner cannot handle heartbeat message with no results | Critical | dataloss, Scanners |
| [HBASE-15271](https://issues.apache.org/jira/browse/HBASE-15271) | Spark Bulk Load: Need to write HFiles to tmp location then rename to protect from Spark Executor Failures | Major | . |
| [HBASE-15364](https://issues.apache.org/jira/browse/HBASE-15364) | Fix unescaped \< characters in Javadoc | Major | API, documentation |
| [HBASE-15137](https://issues.apache.org/jira/browse/HBASE-15137) | CallTimeoutException and CallQueueTooBigException should trigger PFFE | Major | . |
| [HBASE-15393](https://issues.apache.org/jira/browse/HBASE-15393) | Enable table replication command will fail when parent znode is not default in peer cluster | Major | Replication |
| [HBASE-15397](https://issues.apache.org/jira/browse/HBASE-15397) | Create bulk load replication znode(hfile-refs) in ZK replication queue by default | Major | Replication |
| [HBASE-15329](https://issues.apache.org/jira/browse/HBASE-15329) | Cross-Site Scripting: Reflected in table.jsp | Minor | security, UI |
| [HBASE-15128](https://issues.apache.org/jira/browse/HBASE-15128) | Disable region splits and merges switch in master | Major | . |
| [HBASE-15358](https://issues.apache.org/jira/browse/HBASE-15358) | canEnforceTimeLimitFromScope should use timeScope instead of sizeScope | Major | Scanners |
| [HBASE-15332](https://issues.apache.org/jira/browse/HBASE-15332) | Document how to take advantage of HDFS-6133 in HBase | Major | documentation |
| [HBASE-15319](https://issues.apache.org/jira/browse/HBASE-15319) | clearJmxCache does not take effect actually | Major | metrics |
| [HBASE-15247](https://issues.apache.org/jira/browse/HBASE-15247) | InclusiveStopFilter does not respect reverse Filter property | Major | Filters |
| [HBASE-15285](https://issues.apache.org/jira/browse/HBASE-15285) | Forward-port respect for isReturnResult from HBASE-15095 | Major | Client |
| [HBASE-15298](https://issues.apache.org/jira/browse/HBASE-15298) | Fix missing or wrong asciidoc anchors in the reference guide | Minor | documentation |
| [HBASE-15259](https://issues.apache.org/jira/browse/HBASE-15259) | WALEdits under replay will also be replicated | Minor | . |
| [HBASE-15251](https://issues.apache.org/jira/browse/HBASE-15251) | During a cluster restart, Hmaster thinks it is a failover by mistake | Major | master |
| [HBASE-15289](https://issues.apache.org/jira/browse/HBASE-15289) | Add details about how to get usage instructions for Import and Export utilities | Major | documentation |
| [HBASE-13883](https://issues.apache.org/jira/browse/HBASE-13883) | Fix Memstore Flush section in HBase book | Major | documentation |
| [HBASE-15250](https://issues.apache.org/jira/browse/HBASE-15250) | Fix links that are currently redirected from old URLs | Major | documentation, website |
| [HBASE-15279](https://issues.apache.org/jira/browse/HBASE-15279) | OrderedBytes.isEncodedValue does not check for int8 and int16 types | Major | . |
| [HBASE-15276](https://issues.apache.org/jira/browse/HBASE-15276) | TestFlushSnapshotFromClient hung | Major | . |
| [HBASE-15198](https://issues.apache.org/jira/browse/HBASE-15198) | RPC client not using Codec and CellBlock for puts by default | Critical | . |
| [HBASE-15122](https://issues.apache.org/jira/browse/HBASE-15122) | Servlets generate XSS\_REQUEST\_PARAMETER\_TO\_SERVLET\_WRITER findbugs warnings | Critical | UI |
| [HBASE-15079](https://issues.apache.org/jira/browse/HBASE-15079) | TestMultiParallel.validateLoadedData AssertionError: null | Major | Client, flakey, test |
| [HBASE-13839](https://issues.apache.org/jira/browse/HBASE-13839) | Fix AssgnmentManagerTmpl.jamon issues (coloring, content etc.) | Major | master, UI |
| [HBASE-15252](https://issues.apache.org/jira/browse/HBASE-15252) | Data loss when replaying wal if HDFS timeout | Blocker | wal |
| [HBASE-15221](https://issues.apache.org/jira/browse/HBASE-15221) | HTableMultiplexer improvements (stale region locations and resource leaks) | Critical | Client |
| [HBASE-15253](https://issues.apache.org/jira/browse/HBASE-15253) | Small bug in CellUtil.matchingRow(Cell, byte[]) | Minor | . |
| [HBASE-14192](https://issues.apache.org/jira/browse/HBASE-14192) | Fix REST Cluster constructor with String List | Minor | REST |
| [HBASE-15216](https://issues.apache.org/jira/browse/HBASE-15216) | Canary does not accept config params from command line | Major | canary |
| [HBASE-15231](https://issues.apache.org/jira/browse/HBASE-15231) | Make TableState.State private | Major | API |
| [HBASE-15214](https://issues.apache.org/jira/browse/HBASE-15214) | Valid mutate Ops fail with RPC Codec in use and region moves across | Critical | . |
| [HBASE-14770](https://issues.apache.org/jira/browse/HBASE-14770) | RowCounter argument input parse error | Minor | mapreduce |
| [HBASE-15209](https://issues.apache.org/jira/browse/HBASE-15209) | disable table in HBaseTestingUtility.truncateTable | Minor | . |
| [HBASE-15218](https://issues.apache.org/jira/browse/HBASE-15218) | On RS crash and replay of WAL, loosing all Tags in Cells | Blocker | Recovery, regionserver, security |
| [HBASE-15200](https://issues.apache.org/jira/browse/HBASE-15200) | ZooKeeper znode ACL checks should only compare the shortname | Minor | security |
| [HBASE-15206](https://issues.apache.org/jira/browse/HBASE-15206) | Flakey testSplitDaughtersNotInMeta test | Minor | flakey |
| [HBASE-15196](https://issues.apache.org/jira/browse/HBASE-15196) | HBASE-15158 Preamble 2 of 2:Add Increment tests | Major | . |
| [HBASE-15186](https://issues.apache.org/jira/browse/HBASE-15186) | HBASE-15158 Preamble 1 of 2: fix findbugs, add javadoc, change Region#getReadpoint to #getReadPoint, and some util | Major | . |
| [HBASE-15190](https://issues.apache.org/jira/browse/HBASE-15190) | Monkey dies when running on shared cluster (gives up when can't kill the other fellows processes) | Major | integration tests |
| [HBASE-15195](https://issues.apache.org/jira/browse/HBASE-15195) | Don't run findbugs on hbase-it; it has nothing in src/main/java | Major | findbugs |
| [HBASE-14810](https://issues.apache.org/jira/browse/HBASE-14810) | Update Hadoop support description to explain "not tested" vs "not supported" | Critical | documentation |
| [HBASE-15019](https://issues.apache.org/jira/browse/HBASE-15019) | Replication stuck when HDFS is restarted | Major | Replication, wal |
| [HBASE-15173](https://issues.apache.org/jira/browse/HBASE-15173) | Execute mergeRegions RPC call as the request user | Minor | . |
| [HBASE-15146](https://issues.apache.org/jira/browse/HBASE-15146) | Don't block on Reader threads queueing to a scheduler queue | Blocker | . |
| [HBASE-15145](https://issues.apache.org/jira/browse/HBASE-15145) | HBCK and Replication should authenticate to zookepeer using server principal | Major | . |
| [HBASE-15164](https://issues.apache.org/jira/browse/HBASE-15164) | Fix broken links found via LinkLint | Major | documentation |
| [HBASE-15132](https://issues.apache.org/jira/browse/HBASE-15132) | Master region merge RPC should authorize user request | Major | . |
| [HBASE-13082](https://issues.apache.org/jira/browse/HBASE-13082) | Coarsen StoreScanner locks to RegionScanner | Major | Performance, Scanners |
| [HBASE-15148](https://issues.apache.org/jira/browse/HBASE-15148) | Resolve IS2\_INCONSISTENT\_SYNC findbugs warning in AuthenticationTokenSecretManager | Major | . |
| [HBASE-15133](https://issues.apache.org/jira/browse/HBASE-15133) | Data loss after compaction when a row has more than Integer.MAX\_VALUE columns | Major | Compaction |
| [HBASE-15152](https://issues.apache.org/jira/browse/HBASE-15152) | Automatically include prefix-tree module in MR jobs if present | Major | mapreduce |
| [HBASE-15147](https://issues.apache.org/jira/browse/HBASE-15147) | Shell should use Admin.listTableNames() instead of Admin.listTables() | Major | . |
| [HBASE-15126](https://issues.apache.org/jira/browse/HBASE-15126) | HBaseFsck's checkRegionBoundaries function sets incorrect 'storesFirstKey' | Major | hbck |
| [HBASE-15139](https://issues.apache.org/jira/browse/HBASE-15139) | Connection manager doesn't pass client metrics to RpcClient | Major | Client, metrics |
| [HBASE-15098](https://issues.apache.org/jira/browse/HBASE-15098) | Normalizer switch in configuration is not used | Blocker | master |
| [HBASE-15101](https://issues.apache.org/jira/browse/HBASE-15101) | Leaked References to StoreFile.Reader after HBASE-13082 | Critical | HFile, io |
| [HBASE-15102](https://issues.apache.org/jira/browse/HBASE-15102) | HeapMemoryTuner can "overtune" memstore size and suddenly drop it into blocking zone | Critical | regionserver |
| [HBASE-14771](https://issues.apache.org/jira/browse/HBASE-14771) | RpcServer#getRemoteAddress always returns null | Minor | IPC/RPC |
| [HBASE-14512](https://issues.apache.org/jira/browse/HBASE-14512) | Cache UGI groups | Major | Performance, security |
| [HBASE-15104](https://issues.apache.org/jira/browse/HBASE-15104) | Occasional failures due to NotServingRegionException in IT tests | Major | integration tests |
| [HBASE-15117](https://issues.apache.org/jira/browse/HBASE-15117) | Resolve ICAST findbugs warnings in current codes | Minor | . |
| [HBASE-15085](https://issues.apache.org/jira/browse/HBASE-15085) | IllegalStateException was thrown when scanning on bulkloaded HFiles | Critical | . |
| [HBASE-15083](https://issues.apache.org/jira/browse/HBASE-15083) | Gets from Multiactions are not counted in metrics for gets. | Major | . |
| [HBASE-15052](https://issues.apache.org/jira/browse/HBASE-15052) | Use EnvironmentEdgeManager in ReplicationSource | Trivial | Replication |
| [HBASE-15057](https://issues.apache.org/jira/browse/HBASE-15057) | local-master-backup.sh doesn't start HMaster correctly | Major | shell |
| [HBASE-15065](https://issues.apache.org/jira/browse/HBASE-15065) | SimpleRegionNormalizer should return multiple normalization plans in one run | Major | . |
| [HBASE-14975](https://issues.apache.org/jira/browse/HBASE-14975) | Don't color the total RIT line yellow if it's zero | Major | UI |
| [HBASE-15027](https://issues.apache.org/jira/browse/HBASE-15027) | Refactor the way the CompactedHFileDischarger threads are created | Major | . |
| [HBASE-15070](https://issues.apache.org/jira/browse/HBASE-15070) | DistributedHBaseCluster#restoreRegionServers() starts new RS process on master server | Minor | integration tests |
| [HBASE-14867](https://issues.apache.org/jira/browse/HBASE-14867) | SimpleRegionNormalizer needs to have better heuristics to trigger merge operation | Major | master |
| [HBASE-14987](https://issues.apache.org/jira/browse/HBASE-14987) | Compaction marker whose region name doesn't match current region's needs to be handled | Major | . |
| [HBASE-15063](https://issues.apache.org/jira/browse/HBASE-15063) | Bug in MultiByteBuf#toBytes | Critical | io, Performance |
| [HBASE-15050](https://issues.apache.org/jira/browse/HBASE-15050) | Block Ref counting does not work in Region Split cases. | Critical | . |
| [HBASE-15011](https://issues.apache.org/jira/browse/HBASE-15011) | turn off the jdk8 javadoc linter. :( | Blocker | build, documentation |
| [HBASE-15043](https://issues.apache.org/jira/browse/HBASE-15043) | region\_status.rb broken with TypeError: no public constructors for Java::OrgApacheHadoopHbaseClient::HBaseAdmin | Major | scripts |
| [HBASE-15026](https://issues.apache.org/jira/browse/HBASE-15026) | The default value of "hbase.regions.slop" in hbase-default.xml is obsolete | Minor | Balancer |
| [HBASE-15035](https://issues.apache.org/jira/browse/HBASE-15035) | bulkloading hfiles with tags that require splits do not preserve tags | Blocker | HFile |
| [HBASE-15039](https://issues.apache.org/jira/browse/HBASE-15039) | HMaster and RegionServers should try to refresh token keys from zk when facing InvalidToken | Major | . |
| [HBASE-14940](https://issues.apache.org/jira/browse/HBASE-14940) | Make our unsafe based ops more safe | Major | . |
| [HBASE-14717](https://issues.apache.org/jira/browse/HBASE-14717) | enable\_table\_replication command should only create specified table for a peer cluster | Major | Replication |
| [HBASE-15032](https://issues.apache.org/jira/browse/HBASE-15032) | hbase shell scan filter string assumes UTF-8 encoding | Major | shell |
| [HBASE-15034](https://issues.apache.org/jira/browse/HBASE-15034) | IntegrationTestDDLMasterFailover does not clean created namespaces | Minor | integration tests |
| [HBASE-15030](https://issues.apache.org/jira/browse/HBASE-15030) | Deadlock in master TableNamespaceManager while running IntegrationTestDDLMasterFailover | Major | proc-v2 |
| [HBASE-15021](https://issues.apache.org/jira/browse/HBASE-15021) | hadoopqa doing false positives | Major | . |
| [HBASE-15028](https://issues.apache.org/jira/browse/HBASE-15028) | Minor fix on RegionGroupingProvider | Minor | wal |
| [HBASE-14977](https://issues.apache.org/jira/browse/HBASE-14977) | ChoreService.shutdown may result in ConcurrentModificationException | Minor | util |
| [HBASE-15014](https://issues.apache.org/jira/browse/HBASE-15014) | Fix filterCellByStore in WALsplitter is awful for performance | Critical | MTTR, Recovery, wal |
| [HBASE-15001](https://issues.apache.org/jira/browse/HBASE-15001) | Thread Safety issues in ReplicationSinkManager and HBaseInterClusterReplicationEndpoint | Blocker | Replication |
| [HBASE-14654](https://issues.apache.org/jira/browse/HBASE-14654) | Reenable TestMultiParallel#testActiveThreadsCount | Major | test |
| [HBASE-15022](https://issues.apache.org/jira/browse/HBASE-15022) | undefined method \`getZooKeeperClusterKey' for Java::OrgApacheHadoopHbaseZookeeper::ZKUtil:Class | Major | shell |
| [HBASE-14991](https://issues.apache.org/jira/browse/HBASE-14991) | Fix the feature warning in scala code | Minor | . |
| [HBASE-15015](https://issues.apache.org/jira/browse/HBASE-15015) | Checktyle plugin shouldn't check Jamon-generated Java classes | Minor | build |
| [HBASE-14822](https://issues.apache.org/jira/browse/HBASE-14822) | Renewing leases of scanners doesn't work | Major | . |
| [HBASE-13907](https://issues.apache.org/jira/browse/HBASE-13907) | Document how to deploy a coprocessor | Major | documentation |
| [HBASE-14990](https://issues.apache.org/jira/browse/HBASE-14990) | Tests in BaseTestHBaseFsck are run by its subclasses redundantly | Minor | test |
| [HBASE-14999](https://issues.apache.org/jira/browse/HBASE-14999) | Remove ref to org.mortbay.log.Log | Minor | dependencies |
| [HBASE-15000](https://issues.apache.org/jira/browse/HBASE-15000) | Fix javadoc warn in LoadIncrementalHFiles | Trivial | . |
| [HBASE-14974](https://issues.apache.org/jira/browse/HBASE-14974) | Total number of Regions in Transition number on UI incorrect | Trivial | UI |
| [HBASE-14952](https://issues.apache.org/jira/browse/HBASE-14952) | hbase-assembly source artifact has some incorrect modules | Blocker | build, dependencies |
| [HBASE-14807](https://issues.apache.org/jira/browse/HBASE-14807) | TestWALLockup is flakey | Major | flakey, test |
| [HBASE-14843](https://issues.apache.org/jira/browse/HBASE-14843) | TestWALProcedureStore.testLoad is flakey | Blocker | proc-v2 |
| [HBASE-14838](https://issues.apache.org/jira/browse/HBASE-14838) | Clarify that SimpleRegionNormalizer does not merge empty (\<1MB) regions | Trivial | documentation, regionserver |
| [HBASE-13976](https://issues.apache.org/jira/browse/HBASE-13976) | release manager list in ref guide is missing 0.94 line | Major | documentation |
| [HBASE-14968](https://issues.apache.org/jira/browse/HBASE-14968) | ConcurrentModificationException in region close resulting in the region staying in closing state | Major | Region Assignment, regionserver |
| [HBASE-14929](https://issues.apache.org/jira/browse/HBASE-14929) | There is a space missing from Table "foo" is not currently available. | Trivial | . |
| [HBASE-14936](https://issues.apache.org/jira/browse/HBASE-14936) | CombinedBlockCache should overwrite CacheStats#rollMetricsPeriod() | Major | BlockCache |
| [HBASE-14701](https://issues.apache.org/jira/browse/HBASE-14701) | Fix flakey Failed tests: TestMobFlushSnapshotFromClient\>TestFlushSnapshotFromClient.testSkipFlushTableSnapshot:199 null | Major | test |
| [HBASE-14953](https://issues.apache.org/jira/browse/HBASE-14953) | HBaseInterClusterReplicationEndpoint: Do not retry the whole batch of edits in case of RejectedExecutionException | Critical | Replication |
| [HBASE-14960](https://issues.apache.org/jira/browse/HBASE-14960) | Fallback to using default RPCControllerFactory if class cannot be loaded | Major | . |
| [HBASE-14769](https://issues.apache.org/jira/browse/HBASE-14769) | Remove unused functions and duplicate javadocs from HBaseAdmin | Major | . |
| [HBASE-14901](https://issues.apache.org/jira/browse/HBASE-14901) | There is duplicated code to create/manage encryption keys | Minor | encryption |
| [HBASE-14941](https://issues.apache.org/jira/browse/HBASE-14941) | locate\_region shell command | Trivial | shell |
| [HBASE-14942](https://issues.apache.org/jira/browse/HBASE-14942) | Allow turning off BoundedByteBufferPool | Major | . |
| [HBASE-14954](https://issues.apache.org/jira/browse/HBASE-14954) | IllegalArgumentException was thrown when doing online configuration change in CompactSplitThread | Major | Compaction, regionserver |
| [HBASE-14804](https://issues.apache.org/jira/browse/HBASE-14804) | HBase shell's create table command ignores 'NORMALIZATION\_ENABLED' attribute | Minor | shell |
| [HBASE-14917](https://issues.apache.org/jira/browse/HBASE-14917) | Log in console if individual tests in test-patch.sh fail or pass | Minor | . |
| [HBASE-14930](https://issues.apache.org/jira/browse/HBASE-14930) | check\_compatibility.sh needs smarter exit codes | Major | . |
| [HBASE-14923](https://issues.apache.org/jira/browse/HBASE-14923) | VerifyReplication should not mask the exception during result comparison | Minor | tooling |
| [HBASE-14922](https://issues.apache.org/jira/browse/HBASE-14922) | Delayed flush doesn't work causing flush storms. | Major | regionserver |
| [HBASE-14926](https://issues.apache.org/jira/browse/HBASE-14926) | Hung ThriftServer; no timeout on read from client; if client crashes, worker thread gets stuck reading | Major | Thrift |
| [HBASE-14928](https://issues.apache.org/jira/browse/HBASE-14928) | Start row should be set for query through HBase REST gateway involving globbing option | Major | REST |
| [HBASE-14907](https://issues.apache.org/jira/browse/HBASE-14907) | NPE of MobUtils.hasMobColumns in Build failed in Jenkins: HBase-Trunk\_matrix » latest1.8,Hadoop #513 | Major | mob |
| [HBASE-14904](https://issues.apache.org/jira/browse/HBASE-14904) | Mark Base[En\|De]coder LimitedPrivate and fix binary compat issue | Major | . |
| [HBASE-13857](https://issues.apache.org/jira/browse/HBASE-13857) | Slow WAL Append count in ServerMetricsTmpl.jamon is hardcoded to zero | Major | regionserver, UI |
| [HBASE-14905](https://issues.apache.org/jira/browse/HBASE-14905) | VerifyReplication does not honour versions option | Major | tooling |
| [HBASE-14541](https://issues.apache.org/jira/browse/HBASE-14541) | TestHFileOutputFormat.testMRIncrementalLoadWithSplit failed due to too many splits and few retries | Major | HFile, test |
| [HBASE-14462](https://issues.apache.org/jira/browse/HBASE-14462) | rolling\_restart.sh --master-only throws "line 142: test: 0: unary operator expected" | Major | . |
| [HBASE-14896](https://issues.apache.org/jira/browse/HBASE-14896) | Resolve Javadoc warnings in WALKey and RegionMover | Minor | . |
| [HBASE-14531](https://issues.apache.org/jira/browse/HBASE-14531) | graceful\_stop.sh "if [ "$local" ]" condition unexpected behaviour | Major | scripts |
| [HBASE-14890](https://issues.apache.org/jira/browse/HBASE-14890) | Fix javadoc checkstyle errors | Major | . |
| [HBASE-14894](https://issues.apache.org/jira/browse/HBASE-14894) | Fix misspellings of threshold in log4j.properties files for tests | Trivial | . |
| [HBASE-14523](https://issues.apache.org/jira/browse/HBASE-14523) | rolling-restart.sh --graceful will start regionserver process on master node | Major | scripts |
| [HBASE-14893](https://issues.apache.org/jira/browse/HBASE-14893) | Race between mutation on region and region closing operation leads to NotServingRegionException | Major | . |
| [HBASE-14664](https://issues.apache.org/jira/browse/HBASE-14664) | Master failover issue: Backup master is unable to start if active master is killed and started in short time interval | Critical | master |
| [HBASE-14777](https://issues.apache.org/jira/browse/HBASE-14777) | Fix Inter Cluster Replication Future ordering issues | Critical | Replication |
| [HBASE-14885](https://issues.apache.org/jira/browse/HBASE-14885) | NullPointerException in HMaster#normalizeRegions() due to missing TableDescriptor | Major | master |
| [HBASE-14689](https://issues.apache.org/jira/browse/HBASE-14689) | Addendum and unit test for HBASE-13471 | Major | . |
| [HBASE-14463](https://issues.apache.org/jira/browse/HBASE-14463) | Severe performance downgrade when parallel reading a single key from BucketCache | Major | . |
| [HBASE-14861](https://issues.apache.org/jira/browse/HBASE-14861) | HBASE\_ZNODE\_FILE on master server is overwritten by regionserver process in case of master-rs collocation | Major | Operability |
| [HBASE-14825](https://issues.apache.org/jira/browse/HBASE-14825) | HBase Ref Guide corrections of typos/misspellings | Minor | documentation |
| [HBASE-14737](https://issues.apache.org/jira/browse/HBASE-14737) | Clear cachedMaxVersions when HColumnDescriptor#setValue(VERSIONS, value) is called | Major | . |
| [HBASE-14799](https://issues.apache.org/jira/browse/HBASE-14799) | Commons-collections object deserialization remote command execution vulnerability | Critical | dependencies, security |
| [HBASE-14840](https://issues.apache.org/jira/browse/HBASE-14840) | Sink cluster reports data replication request as success though the data is not replicated | Major | Replication |
| [HBASE-14712](https://issues.apache.org/jira/browse/HBASE-14712) | MasterProcWALs never clean up | Blocker | proc-v2 |
| [HBASE-14761](https://issues.apache.org/jira/browse/HBASE-14761) | Deletes with and without visibility expression do not delete the matching mutation | Major | security |
| [HBASE-14782](https://issues.apache.org/jira/browse/HBASE-14782) | FuzzyRowFilter skips valid rows | Major | Filters |
| [HBASE-14824](https://issues.apache.org/jira/browse/HBASE-14824) | HBaseAdmin.mergeRegions should recognize both full region names and encoded region names | Minor | Admin |
| [HBASE-14815](https://issues.apache.org/jira/browse/HBASE-14815) | TestMobExportSnapshot.testExportFailure timeout occasionally | Major | . |
| [HBASE-14823](https://issues.apache.org/jira/browse/HBASE-14823) | HBase Ref Guide Refactoring | Major | documentation |
| [HBASE-14812](https://issues.apache.org/jira/browse/HBASE-14812) | Fix ResultBoundedCompletionService deadlock | Major | Client, Thrift |
| [HBASE-14793](https://issues.apache.org/jira/browse/HBASE-14793) | Allow limiting size of block into L1 block cache. | Major | BlockCache |
| [HBASE-14806](https://issues.apache.org/jira/browse/HBASE-14806) | Missing sources.jar for several modules when building HBase | Major | pom |
| [HBASE-14809](https://issues.apache.org/jira/browse/HBASE-14809) | Grant / revoke Namespace admin permission to group | Major | security |
| [HBASE-14802](https://issues.apache.org/jira/browse/HBASE-14802) | Replaying server crash recovery procedure after a failover causes incorrect handling of deadservers | Major | master |
| [HBASE-13982](https://issues.apache.org/jira/browse/HBASE-13982) | Add info for visibility labels/cell TTLs to ImportTsv | Major | mapreduce |
| [HBASE-14797](https://issues.apache.org/jira/browse/HBASE-14797) | Last round of CSS fix-ups | Major | website |
| [HBASE-14788](https://issues.apache.org/jira/browse/HBASE-14788) | Splitting a region does not support the hbase.rs.evictblocksonclose config when closing source region | Major | regionserver |
| [HBASE-14778](https://issues.apache.org/jira/browse/HBASE-14778) | Make block cache hit percentages not integer in the metrics system | Major | BlockCache, metrics |
| [HBASE-14784](https://issues.apache.org/jira/browse/HBASE-14784) | Port conflict is not resolved in HBaseTestingUtility.randomFreePort() | Minor | test |
| [HBASE-14787](https://issues.apache.org/jira/browse/HBASE-14787) | Remove obsolete ConnectionImplementation.refCount | Trivial | . |
| [HBASE-14781](https://issues.apache.org/jira/browse/HBASE-14781) | Turn per cf flushing on for ITBLL by default | Major | integration tests |
| [HBASE-14774](https://issues.apache.org/jira/browse/HBASE-14774) | Raise the font size on high-DPI small-screen devices like iphone 6+ | Major | website |
| [HBASE-14767](https://issues.apache.org/jira/browse/HBASE-14767) | Remove deprecated functions from HBaseAdmin | Major | . |
| [HBASE-14759](https://issues.apache.org/jira/browse/HBASE-14759) | Avoid using Math.abs when selecting SyncRunner in FSHLog | Major | wal |
| [HBASE-14632](https://issues.apache.org/jira/browse/HBASE-14632) | Region server aborts due to unguarded dereference of Reader | Major | regionserver |
| [HBASE-14706](https://issues.apache.org/jira/browse/HBASE-14706) | RegionLocationFinder should return multiple servernames by top host | Major | Balancer |
| [HBASE-14755](https://issues.apache.org/jira/browse/HBASE-14755) | Fix some broken links and HTML problems | Major | documentation |
| [HBASE-14773](https://issues.apache.org/jira/browse/HBASE-14773) | Fix HBase shell tests are skipped when skipping server tests. | Major | test |
| [HBASE-14768](https://issues.apache.org/jira/browse/HBASE-14768) | bin/graceful\_stop.sh logs nothing as a balancer state to be stored | Trivial | scripts |
| [HBASE-14723](https://issues.apache.org/jira/browse/HBASE-14723) | Fix IT tests split too many times | Major | integration tests |
| [HBASE-14733](https://issues.apache.org/jira/browse/HBASE-14733) | Minor typo in alter\_namespace.rb | Trivial | shell |
| [HBASE-14754](https://issues.apache.org/jira/browse/HBASE-14754) | TestFastFailWithoutTestUtil failing on trunk now in #testPreemptiveFastFailException50Times | Major | flakey, test |
| [HBASE-14751](https://issues.apache.org/jira/browse/HBASE-14751) | Book seems to be broken | Major | . |
| [HBASE-14742](https://issues.apache.org/jira/browse/HBASE-14742) | TestHeapMemoryManager is flakey | Major | test |
| [HBASE-14739](https://issues.apache.org/jira/browse/HBASE-14739) | Fix broken link to Javadoc that is suppressed because it is generated code | Trivial | documentation |
| [HBASE-14532](https://issues.apache.org/jira/browse/HBASE-14532) | [book] dfs.client.read.shortcircuit is referenced as hbase-site.xml config and not described in section 7 | Minor | documentation |
| [HBASE-14711](https://issues.apache.org/jira/browse/HBASE-14711) | Remove or annotated deprecated methods in HRegionInfo | Major | hbase |
| [HBASE-14557](https://issues.apache.org/jira/browse/HBASE-14557) | MapReduce WALPlayer issue with NoTagsKeyValue | Blocker | tooling |
| [HBASE-14650](https://issues.apache.org/jira/browse/HBASE-14650) | Reenable TestNamespaceAuditor | Major | . |
| [HBASE-14660](https://issues.apache.org/jira/browse/HBASE-14660) | AssertionError found when using offheap BucketCache with assertion enabled | Major | . |
| [HBASE-14695](https://issues.apache.org/jira/browse/HBASE-14695) | Fix some easy HTML warnings | Minor | documentation |
| [HBASE-14425](https://issues.apache.org/jira/browse/HBASE-14425) | In Secure Zookeeper cluster superuser will not have sufficient permission if multiple values are configured in "hbase.superuser" | Major | security, Zookeeper |
| [HBASE-14674](https://issues.apache.org/jira/browse/HBASE-14674) | Rpc handler / task monitoring seems to be broken after 0.98 | Major | . |
| [HBASE-14705](https://issues.apache.org/jira/browse/HBASE-14705) | Javadoc for KeyValue constructor is not correct. | Minor | . |
| [HBASE-14680](https://issues.apache.org/jira/browse/HBASE-14680) | Two configs for snapshot timeout and better defaults | Major | snapshots |
| [HBASE-14349](https://issues.apache.org/jira/browse/HBASE-14349) | pre-commit zombie finder is overly broad | Critical | build |
| [HBASE-14694](https://issues.apache.org/jira/browse/HBASE-14694) | Scan copy constructor doesn't handle allowPartialResults | Major | Client |
| [HBASE-14257](https://issues.apache.org/jira/browse/HBASE-14257) | Periodic flusher only handles hbase:meta, not other system tables | Major | regionserver |
| [HBASE-14682](https://issues.apache.org/jira/browse/HBASE-14682) | CM restore functionality for regionservers is broken | Major | integration tests |
| [HBASE-14283](https://issues.apache.org/jira/browse/HBASE-14283) | Reverse scan doesn’t work with HFile inline index/bloom blocks | Major | . |
| [HBASE-13318](https://issues.apache.org/jira/browse/HBASE-13318) | RpcServer.getListenerAddress should handle when the accept channel is closed | Minor | . |
| [HBASE-14661](https://issues.apache.org/jira/browse/HBASE-14661) | RegionServer link is not opening, in HBase Table page. | Minor | UI |
| [HBASE-14690](https://issues.apache.org/jira/browse/HBASE-14690) | Fix css so there's no left/right scroll bar | Major | UI |
| [HBASE-14624](https://issues.apache.org/jira/browse/HBASE-14624) | BucketCache.freeBlock is too expensive | Major | BlockCache |
| [HBASE-14676](https://issues.apache.org/jira/browse/HBASE-14676) | HBaseTestCase clean out: Purge Incommon Interface and Table and Region implementations | Major | . |
| [HBASE-14343](https://issues.apache.org/jira/browse/HBASE-14343) | Fix debug message in SimpleRegionNormalizer for small regions | Trivial | regionserver |
| [HBASE-14681](https://issues.apache.org/jira/browse/HBASE-14681) | Upgrade Checkstyle plugin to 2.16 | Major | build |
| [HBASE-14667](https://issues.apache.org/jira/browse/HBASE-14667) | HBaseFsck constructors have diverged | Minor | hbck |
| [HBASE-14658](https://issues.apache.org/jira/browse/HBASE-14658) | Allow loading a MonkeyFactory by class name | Major | integration tests, test |
| [HBASE-14603](https://issues.apache.org/jira/browse/HBASE-14603) | Lots of work on the POM to enhance Javadocs, Xrefs | Major | documentation |
| [HBASE-14326](https://issues.apache.org/jira/browse/HBASE-14326) | HBase book: fix definition of max min size to compact | Major | documentation |
| [HBASE-14663](https://issues.apache.org/jira/browse/HBASE-14663) | HStore::close does not honor config hbase.rs.evictblocksonclose | Minor | BlockCache, regionserver |
| [HBASE-14427](https://issues.apache.org/jira/browse/HBASE-14427) | Fix 'should' assertions in TestFastFail | Minor | test |
| [HBASE-14633](https://issues.apache.org/jira/browse/HBASE-14633) | Try fluid width UI | Major | UI |
| [HBASE-14366](https://issues.apache.org/jira/browse/HBASE-14366) | NPE in case visibility expression is not present in labels table during importtsv run | Minor | . |
| [HBASE-14604](https://issues.apache.org/jira/browse/HBASE-14604) | Improve MoveCostFunction in StochasticLoadBalancer | Major | Balancer |
| [HBASE-14606](https://issues.apache.org/jira/browse/HBASE-14606) | TestSecureLoadIncrementalHFiles tests timed out in trunk build on apache | Major | test |
| [HBASE-12558](https://issues.apache.org/jira/browse/HBASE-12558) | Disable TestHCM.testClusterStatus Unexpected exception, expected\<org.apache.hadoop.hbase.regionserver.RegionServerStoppedException\> but was\<junit.framework.AssertionFailedError\> | Major | test |
| [HBASE-14458](https://issues.apache.org/jira/browse/HBASE-14458) | AsyncRpcClient#createRpcChannel() should check and remove dead channel before creating new one to same server | Critical | IPC/RPC |
| [HBASE-14634](https://issues.apache.org/jira/browse/HBASE-14634) | Disable flakey TestSnapshotCloneIndependence.testOnlineSnapshotDeleteIndependent | Major | test |
| [HBASE-14621](https://issues.apache.org/jira/browse/HBASE-14621) | ReplicationLogCleaner gets stuck when a regionserver crashes | Critical | Replication |
| [HBASE-14625](https://issues.apache.org/jira/browse/HBASE-14625) | Chaos Monkey should shut down faster | Major | integration tests, test |
| [HBASE-14597](https://issues.apache.org/jira/browse/HBASE-14597) | Fix Groups cache in multi-threaded env | Major | . |
| [HBASE-14474](https://issues.apache.org/jira/browse/HBASE-14474) | DeadLock in RpcClientImpl.Connection.close() | Blocker | IPC/RPC |
| [HBASE-14594](https://issues.apache.org/jira/browse/HBASE-14594) | Use new DNS API introduced in HADOOP-12437 | Major | util |
| [HBASE-14521](https://issues.apache.org/jira/browse/HBASE-14521) | Unify the semantic of hbase.client.retries.number | Major | . |
| [HBASE-14608](https://issues.apache.org/jira/browse/HBASE-14608) | testWalRollOnLowReplication has some risk to assert failed after HBASE-14600 | Major | test |
| [HBASE-14598](https://issues.apache.org/jira/browse/HBASE-14598) | ByteBufferOutputStream grows its HeapByteBuffer beyond JVM limitations | Major | Client, io |
| [HBASE-14591](https://issues.apache.org/jira/browse/HBASE-14591) | Region with reference hfile may split after a forced split in IncreasingToUpperBoundRegionSplitPolicy | Critical | regionserver |
| [HBASE-14599](https://issues.apache.org/jira/browse/HBASE-14599) | Modify site config to use protocol-relative URLs for CSS/JS | Blocker | documentation |
| [HBASE-14501](https://issues.apache.org/jira/browse/HBASE-14501) | NPE in replication when HDFS transparent encryption is enabled. | Critical | Replication, security |
| [HBASE-14211](https://issues.apache.org/jira/browse/HBASE-14211) | Add more rigorous integration tests of splits | Major | integration tests, test |
| [HBASE-14592](https://issues.apache.org/jira/browse/HBASE-14592) | BatchRestartRsAction always restarts 0 RS when running SlowDeterministicMonkey | Major | integration tests |
| [HBASE-14577](https://issues.apache.org/jira/browse/HBASE-14577) | HBase shell help for scan and returning a column family has a typo | Trivial | shell |
| [HBASE-14578](https://issues.apache.org/jira/browse/HBASE-14578) | URISyntaxException during snapshot restore for table with user defined namespace | Major | snapshots |
| [HBASE-14581](https://issues.apache.org/jira/browse/HBASE-14581) | Znode cleanup throws auth exception in secure mode | Major | security, Zookeeper |
| [HBASE-13858](https://issues.apache.org/jira/browse/HBASE-13858) | RS/MasterDumpServlet dumps threads before its “Stacks” header | Trivial | master, regionserver, UI |
| [HBASE-14525](https://issues.apache.org/jira/browse/HBASE-14525) | Append and increment operation throws NullPointerException on non-existing column families. | Minor | shell |
| [HBASE-14497](https://issues.apache.org/jira/browse/HBASE-14497) | Reverse Scan threw StackOverflow caused by readPt checking | Major | . |
| [HBASE-14346](https://issues.apache.org/jira/browse/HBASE-14346) | Typo in FamilyFilter | Trivial | documentation |
| [HBASE-12983](https://issues.apache.org/jira/browse/HBASE-12983) | HBase book mentions hadoop.ssl.enabled when it should be hbase.ssl.enabled | Major | documentation |
| [HBASE-12615](https://issues.apache.org/jira/browse/HBASE-12615) | Document GC conserving guidelines for contributors | Major | documentation |
| [HBASE-14555](https://issues.apache.org/jira/browse/HBASE-14555) | Deadlock in MVCC branch-1.2 toString() | Critical | regionserver |
| [HBASE-14347](https://issues.apache.org/jira/browse/HBASE-14347) | Add a switch to DynamicClassLoader to disable it | Major | Client, defaults, regionserver |
| [HBASE-14544](https://issues.apache.org/jira/browse/HBASE-14544) | Allow HConnectionImpl to not refresh the dns on errors | Major | Client |
| [HBASE-14367](https://issues.apache.org/jira/browse/HBASE-14367) | Add normalization support to shell | Major | Balancer, shell |
| [HBASE-14545](https://issues.apache.org/jira/browse/HBASE-14545) | TestMasterFailover often times out | Major | test |
| [HBASE-14499](https://issues.apache.org/jira/browse/HBASE-14499) | Master coprocessors shutdown will not happen on master abort | Major | master |
| [HBASE-13770](https://issues.apache.org/jira/browse/HBASE-13770) | Programmatic JAAS configuration option for secure zookeeper may be broken | Major | Operability, security |
| [HBASE-14292](https://issues.apache.org/jira/browse/HBASE-14292) | Call Me Maybe HBase links haved moved | Minor | documentation |
| [HBASE-13744](https://issues.apache.org/jira/browse/HBASE-13744) | TestCorruptedRegionStoreFile is flaky | Major | test |
| [HBASE-13143](https://issues.apache.org/jira/browse/HBASE-13143) | TestCacheOnWrite is flaky and needs a diet | Critical | test |
| [HBASE-14475](https://issues.apache.org/jira/browse/HBASE-14475) | Region split requests are always audited with "hbase" user rather than request user | Major | regionserver, security |
| [HBASE-14494](https://issues.apache.org/jira/browse/HBASE-14494) | Wrong usage messages on shell commands | Minor | shell |
| [HBASE-14518](https://issues.apache.org/jira/browse/HBASE-14518) | Give TestScanEarlyTermination the same treatment as 'HBASE-14378 Get TestAccessController\* passing again...' -- up priority handlers | Major | test |
| [HBASE-14394](https://issues.apache.org/jira/browse/HBASE-14394) | Properly close the connection after reading records from table. | Minor | mapreduce |
| [HBASE-14510](https://issues.apache.org/jira/browse/HBASE-14510) | Can not set coprocessor from Shell after HBASE-14224 | Major | Coprocessors, shell |
| [HBASE-14362](https://issues.apache.org/jira/browse/HBASE-14362) | org.apache.hadoop.hbase.master.procedure.TestWALProcedureStoreOnHDFS is super duper flaky | Critical | test |
| [HBASE-14473](https://issues.apache.org/jira/browse/HBASE-14473) | Compute region locality in parallel | Major | Balancer |
| [HBASE-14437](https://issues.apache.org/jira/browse/HBASE-14437) | ArithmeticException in ReplicationInterClusterEndpoint | Minor | Replication |
| [HBASE-14500](https://issues.apache.org/jira/browse/HBASE-14500) | Remove load of deprecated MOB ruby scripts after HBASE-14227 | Major | shell |
| [HBASE-14489](https://issues.apache.org/jira/browse/HBASE-14489) | postScannerFilterRow consumes a lot of CPU | Major | Coprocessors, Performance |
| [HBASE-14370](https://issues.apache.org/jira/browse/HBASE-14370) | Use separate thread for calling ZKPermissionWatcher#refreshNodes() | Major | . |
| [HBASE-14492](https://issues.apache.org/jira/browse/HBASE-14492) | Increase REST server header buffer size from 8k to 64k | Major | REST |
| [HBASE-14471](https://issues.apache.org/jira/browse/HBASE-14471) | Thrift - HTTP Error 413 full HEAD if using kerberos authentication | Major | Thrift |
| [HBASE-14469](https://issues.apache.org/jira/browse/HBASE-14469) | Fix some comment, validation and logging around memstore lower limit configuration | Minor | . |
| [HBASE-14486](https://issues.apache.org/jira/browse/HBASE-14486) | Disable TestRegionPlacement, a flakey test for an unfinished feature | Major | test |
| [HBASE-13324](https://issues.apache.org/jira/browse/HBASE-13324) | o.a.h.h.Coprocessor should be LimitedPrivate("Coprocessor") | Minor | API |
| [HBASE-14445](https://issues.apache.org/jira/browse/HBASE-14445) | ExportSnapshot does not honor -chmod option | Major | snapshots |
| [HBASE-14338](https://issues.apache.org/jira/browse/HBASE-14338) | License notification misspells 'Asciidoctor' | Minor | . |
| [HBASE-14280](https://issues.apache.org/jira/browse/HBASE-14280) | Bulk Upload from HA cluster to remote HA hbase cluster fails | Minor | hadoop2, regionserver |
| [HBASE-14431](https://issues.apache.org/jira/browse/HBASE-14431) | AsyncRpcClient#removeConnection() never removes connection from connections pool if server fails | Critical | IPC/RPC |
| [HBASE-14449](https://issues.apache.org/jira/browse/HBASE-14449) | Rewrite deadlock prevention for concurrent connection close | Major | master, metrics |
| [HBASE-13250](https://issues.apache.org/jira/browse/HBASE-13250) | chown of ExportSnapshot does not cover all path and files | Critical | snapshots |
| [HBASE-14411](https://issues.apache.org/jira/browse/HBASE-14411) | Fix unit test failures when using multiwal as default WAL provider | Major | . |
| [HBASE-14429](https://issues.apache.org/jira/browse/HBASE-14429) | Checkstyle report is broken | Minor | scripts |
| [HBASE-14400](https://issues.apache.org/jira/browse/HBASE-14400) | Fix HBase RPC protection documentation | Critical | encryption, IPC/RPC, security |
| [HBASE-14145](https://issues.apache.org/jira/browse/HBASE-14145) | Allow the Canary in regionserver mode to try all regions on the server, not just one | Major | canary, util |
| [HBASE-14380](https://issues.apache.org/jira/browse/HBASE-14380) | Correct data gets skipped along with bad data in importTsv bulk load thru TsvImporterTextMapper | Major | mapreduce, tooling |
| [HBASE-14307](https://issues.apache.org/jira/browse/HBASE-14307) | Incorrect use of positional read api in HFileBlock | Major | io |
| [HBASE-14392](https://issues.apache.org/jira/browse/HBASE-14392) | [tests] TestLogRollingNoCluster fails on master from time to time | Major | test |
| [HBASE-14382](https://issues.apache.org/jira/browse/HBASE-14382) | TestInterfaceAudienceAnnotations should hadoop-compt module resources | Minor | test |
| [HBASE-14385](https://issues.apache.org/jira/browse/HBASE-14385) | Close the sockets that is missing in connection closure. | Minor | Client |
| [HBASE-14393](https://issues.apache.org/jira/browse/HBASE-14393) | Have TestHFileEncryption clean up after itself so it don't go all zombie on us | Major | test |
| [HBASE-14384](https://issues.apache.org/jira/browse/HBASE-14384) | Trying to run canary locally with -regionserver option causes exception | Major | canary |
| [HBASE-14317](https://issues.apache.org/jira/browse/HBASE-14317) | Stuck FSHLog: bad disk (HDFS-8960) and can't roll WAL | Blocker | wal |
| [HBASE-14327](https://issues.apache.org/jira/browse/HBASE-14327) | TestIOFencing#testFencingAroundCompactionAfterWALSync is flaky | Critical | test |
| [HBASE-14359](https://issues.apache.org/jira/browse/HBASE-14359) | HTable#close will hang forever if unchecked error/exception thrown in AsyncProcess#sendMultiAction | Major | Client |
| [HBASE-14229](https://issues.apache.org/jira/browse/HBASE-14229) | Flushing canceled by coprocessor still leads to memstoreSize set down | Major | regionserver |
| [HBASE-14337](https://issues.apache.org/jira/browse/HBASE-14337) | build error on master | Major | . |
| [HBASE-14354](https://issues.apache.org/jira/browse/HBASE-14354) | Minor improvements for usage of the mlock agent | Trivial | hbase, regionserver |
| [HBASE-13221](https://issues.apache.org/jira/browse/HBASE-13221) | HDFS Transparent Encryption breaks WAL writing in Hadoop 2.6.0 | Critical | documentation, wal |
| [HBASE-14258](https://issues.apache.org/jira/browse/HBASE-14258) | Make region\_mover.rb script case insensitive with regard to hostname | Minor | . |
| [HBASE-14315](https://issues.apache.org/jira/browse/HBASE-14315) | Save one call to KeyValueHeap.peek per row | Major | . |
| [HBASE-14313](https://issues.apache.org/jira/browse/HBASE-14313) | After a Connection sees ConnectionClosingException it never recovers | Critical | Client |
| [HBASE-13339](https://issues.apache.org/jira/browse/HBASE-13339) | Update default Hadoop version to latest for master | Blocker | build |
| [HBASE-14269](https://issues.apache.org/jira/browse/HBASE-14269) | FuzzyRowFilter omits certain rows when multiple fuzzy keys exist | Major | Filters |
| [HBASE-14302](https://issues.apache.org/jira/browse/HBASE-14302) | TableSnapshotInputFormat should not create back references when restoring snapshot | Major | . |
| [HBASE-14224](https://issues.apache.org/jira/browse/HBASE-14224) | Fix coprocessor handling of duplicate classes | Critical | Coprocessors |
| [HBASE-13480](https://issues.apache.org/jira/browse/HBASE-13480) | ShortCircuitConnection doesn't short-circuit all calls as expected | Critical | Client |
| [HBASE-14273](https://issues.apache.org/jira/browse/HBASE-14273) | Rename MVCC to MVCC: From MultiVersionConsistencyControl to MultiVersionConcurrencyControl | Major | regionserver |
| [HBASE-14291](https://issues.apache.org/jira/browse/HBASE-14291) | NPE On StochasticLoadBalancer Balance Involving RS With No Regions | Minor | Balancer |
| [HBASE-14250](https://issues.apache.org/jira/browse/HBASE-14250) | branch-1.1 hbase-server test-jar has incorrect LICENSE | Blocker | build |
| [HBASE-14251](https://issues.apache.org/jira/browse/HBASE-14251) | javadoc jars use LICENSE/NOTICE from primary artifact | Blocker | build |
| [HBASE-14249](https://issues.apache.org/jira/browse/HBASE-14249) | shaded jar modules create spurious source and test jars with incorrect LICENSE/NOTICE info | Major | build |
| [HBASE-14243](https://issues.apache.org/jira/browse/HBASE-14243) | Incorrect NOTICE file in hbase-it test-jar | Blocker | build |
| [HBASE-14234](https://issues.apache.org/jira/browse/HBASE-14234) | Procedure-V2: Exception encountered in WALProcedureStore#rollWriter() should be properly handled | Minor | proc-v2 |
| [HBASE-14241](https://issues.apache.org/jira/browse/HBASE-14241) | Fix deadlock during cluster shutdown due to concurrent connection close | Critical | master, metrics |
| [HBASE-14228](https://issues.apache.org/jira/browse/HBASE-14228) | Close BufferedMutator and connection in MultiTableOutputFormat | Minor | mapreduce |
| [HBASE-14166](https://issues.apache.org/jira/browse/HBASE-14166) | Per-Region metrics can be stale | Major | metrics |
| [HBASE-10844](https://issues.apache.org/jira/browse/HBASE-10844) | Coprocessor failure during batchmutation leaves the memstore datastructs in an inconsistent state | Major | regionserver |
| [HBASE-13966](https://issues.apache.org/jira/browse/HBASE-13966) | Limit column width in table.jsp | Minor | Operability, UI |
| [HBASE-14219](https://issues.apache.org/jira/browse/HBASE-14219) | src tgz no longer builds after HBASE-14085 | Blocker | build |
| [HBASE-14214](https://issues.apache.org/jira/browse/HBASE-14214) | list\_labels shouldn't raise ArgumentError if no labels are defined | Minor | . |
| [HBASE-14054](https://issues.apache.org/jira/browse/HBASE-14054) | Acknowledged writes may get lost if regionserver clock is set backwards | Major | regionserver |
| [HBASE-14098](https://issues.apache.org/jira/browse/HBASE-14098) | Allow dropping caches behind compactions | Major | Compaction, hadoop2, HFile |
| [HBASE-14196](https://issues.apache.org/jira/browse/HBASE-14196) | Thrift server idle connection timeout issue | Major | Thrift |
| [HBASE-14209](https://issues.apache.org/jira/browse/HBASE-14209) | TestShell visibility tests failing | Major | security, shell |
| [HBASE-14201](https://issues.apache.org/jira/browse/HBASE-14201) | hbck should not take a lock unless fixing errors | Major | hbck, util |
| [HBASE-13889](https://issues.apache.org/jira/browse/HBASE-13889) | Fix hbase-shaded-client artifact so it works on hbase-downstreamer | Critical | Client |
| [HBASE-14208](https://issues.apache.org/jira/browse/HBASE-14208) | Remove yarn dependencies on -common and -client | Major | build, Client |
| [HBASE-14206](https://issues.apache.org/jira/browse/HBASE-14206) | MultiRowRangeFilter returns records whose rowKeys are out of allowed ranges | Critical | Filters |
| [HBASE-13062](https://issues.apache.org/jira/browse/HBASE-13062) | Add documentation coverage for configuring dns server with thrift and rest gateways | Minor | documentation |
| [HBASE-5878](https://issues.apache.org/jira/browse/HBASE-5878) | Use getVisibleLength public api from HdfsDataInputStream from Hadoop-2. | Major | wal |
| [HBASE-14092](https://issues.apache.org/jira/browse/HBASE-14092) | hbck should run without locks by default and only disable the balancer when necessary | Major | hbck, util |
| [HBASE-13924](https://issues.apache.org/jira/browse/HBASE-13924) | Description for hbase.dynamic.jars.dir is wrong | Major | . |
| [HBASE-12865](https://issues.apache.org/jira/browse/HBASE-12865) | WALs may be deleted before they are replicated to peers | Critical | Replication |
| [HBASE-13825](https://issues.apache.org/jira/browse/HBASE-13825) | Use ProtobufUtil#mergeFrom and ProtobufUtil#mergeDelimitedFrom in place of builder methods of same name | Major | util |
| [HBASE-13865](https://issues.apache.org/jira/browse/HBASE-13865) | Increase the default value for hbase.hregion.memstore.block.multipler from 2 to 4 (part 2) | Trivial | regionserver |
| [HBASE-14178](https://issues.apache.org/jira/browse/HBASE-14178) | regionserver blocks because of waiting for offsetLock | Major | regionserver |
| [HBASE-14183](https://issues.apache.org/jira/browse/HBASE-14183) | [Shell] Scanning hbase meta table is failing in master branch | Major | shell |
| [HBASE-14021](https://issues.apache.org/jira/browse/HBASE-14021) | Quota table has a wrong description on the UI | Minor | UI |
| [HBASE-14185](https://issues.apache.org/jira/browse/HBASE-14185) | Incorrect region names logged by MemStoreFlusher | Minor | regionserver |
| [HBASE-13864](https://issues.apache.org/jira/browse/HBASE-13864) | HColumnDescriptor should parse the output from master and from describe for TTL | Major | shell |
| [HBASE-14162](https://issues.apache.org/jira/browse/HBASE-14162) | Fixing maven target for regenerating thrift classes fails against 0.9.2 | Blocker | build, Thrift |
| [HBASE-14168](https://issues.apache.org/jira/browse/HBASE-14168) | Avoid useless retry for DoNotRetryIOException in TableRecordReaderImpl | Minor | mapreduce |
| [HBASE-14173](https://issues.apache.org/jira/browse/HBASE-14173) | includeMVCCReadpoint parameter in DefaultCompactor#createTmpWriter() represents no-op | Major | . |
| [HBASE-14155](https://issues.apache.org/jira/browse/HBASE-14155) | StackOverflowError in reverse scan | Critical | regionserver, Scanners |
| [HBASE-14153](https://issues.apache.org/jira/browse/HBASE-14153) | Typo in ProcedureManagerHost.MASTER\_PROCEUDRE\_CONF\_KEY | Trivial | . |
| [HBASE-14157](https://issues.apache.org/jira/browse/HBASE-14157) | Interfaces implemented by subclasses should be checked when registering CoprocessorService | Major | Coprocessors |
| [HBASE-14024](https://issues.apache.org/jira/browse/HBASE-14024) | ImportTsv is not loading hbase-default.xml | Critical | mapreduce |
| [HBASE-14156](https://issues.apache.org/jira/browse/HBASE-14156) | Fix test failure in TestOpenTableInCoprocessor | Major | . |
| [HBASE-14146](https://issues.apache.org/jira/browse/HBASE-14146) | Once replication sees an error it slows down forever | Major | Replication |
| [HBASE-14115](https://issues.apache.org/jira/browse/HBASE-14115) | Fix resource leak in HMasterCommandLine | Major | master, tooling |
| [HBASE-14119](https://issues.apache.org/jira/browse/HBASE-14119) | Show meaningful error messages instead of stack traces in hbase shell commands. Fixing few commands in this jira. | Minor | . |
| [HBASE-14065](https://issues.apache.org/jira/browse/HBASE-14065) | ref guide section on release candidate generation refers to old doc files | Major | documentation |
| [HBASE-14000](https://issues.apache.org/jira/browse/HBASE-14000) | Region server failed to report to Master and was stuck in reportForDuty retry loop | Major | regionserver |
| [HBASE-14106](https://issues.apache.org/jira/browse/HBASE-14106) | TestProcedureRecovery is flaky | Major | proc-v2, test |
| [HBASE-14076](https://issues.apache.org/jira/browse/HBASE-14076) | ResultSerialization and MutationSerialization can throw InvalidProtocolBufferException when serializing a cell larger than 64MB | Major | . |
| [HBASE-13971](https://issues.apache.org/jira/browse/HBASE-13971) | Flushes stuck since 6 hours on a regionserver. | Critical | regionserver |
| [HBASE-14050](https://issues.apache.org/jira/browse/HBASE-14050) | NPE in org.apache.hadoop.hbase.ipc.RpcServer$Connection.readAndProcess | Minor | . |
| [HBASE-14100](https://issues.apache.org/jira/browse/HBASE-14100) | Fix high priority findbugs warnings | Major | regionserver |
| [HBASE-14089](https://issues.apache.org/jira/browse/HBASE-14089) | Remove unnecessary draw of system entropy from RecoverableZooKeeper | Minor | . |
| [HBASE-14094](https://issues.apache.org/jira/browse/HBASE-14094) | Procedure.proto can't be compiled to C++ | Major | proc-v2, Protobufs |
| [HBASE-14077](https://issues.apache.org/jira/browse/HBASE-14077) | Add package to hbase-protocol protobuf files. | Major | Protobufs |
| [HBASE-14041](https://issues.apache.org/jira/browse/HBASE-14041) | Client MetaCache is cleared if a ThrottlingException is thrown | Minor | Client |
| [HBASE-13897](https://issues.apache.org/jira/browse/HBASE-13897) | OOM may occur when Import imports a row with too many KeyValues | Major | . |
| [HBASE-14073](https://issues.apache.org/jira/browse/HBASE-14073) | TestRemoteTable.testDelete failed in the latest trunk code | Major | REST |
| [HBASE-13997](https://issues.apache.org/jira/browse/HBASE-13997) | ScannerCallableWithReplicas cause Infinitely blocking | Minor | Client |
| [HBASE-14029](https://issues.apache.org/jira/browse/HBASE-14029) | getting started for standalone still references hadoop-version-specific binary artifacts | Major | documentation |
| [HBASE-14042](https://issues.apache.org/jira/browse/HBASE-14042) | Fix FATAL level logging in FSHLog where logged for non fatal exceptions | Major | Operability, wal |
| [HBASE-13337](https://issues.apache.org/jira/browse/HBASE-13337) | Table regions are not assigning back, after restarting all regionservers at once. | Blocker | Region Assignment |
| [HBASE-13561](https://issues.apache.org/jira/browse/HBASE-13561) | ITBLL.Verify doesn't actually evaluate counters after job completes | Major | integration tests |
| [HBASE-13988](https://issues.apache.org/jira/browse/HBASE-13988) | Add exception handler for lease thread | Minor | . |
| [HBASE-13352](https://issues.apache.org/jira/browse/HBASE-13352) | Add hbase.import.version to Import usage. | Major | . |
| [HBASE-14012](https://issues.apache.org/jira/browse/HBASE-14012) | Double Assignment and Dataloss when ServerCrashProcedure runs during Master failover | Blocker | master, Region Assignment |
| [HBASE-13329](https://issues.apache.org/jira/browse/HBASE-13329) | ArrayIndexOutOfBoundsException in CellComparator#getMinimumMidpointArray | Critical | regionserver |
| [HBASE-14011](https://issues.apache.org/jira/browse/HBASE-14011) | MultiByteBuffer position based reads does not work correctly | Major | . |
| [HBASE-13861](https://issues.apache.org/jira/browse/HBASE-13861) | BucketCacheTmpl.jamon has wrong bucket free and used labels | Major | regionserver, UI |
| [HBASE-14010](https://issues.apache.org/jira/browse/HBASE-14010) | TestRegionRebalancing.testRebalanceOnRegionServerNumberChange fails; cluster not balanced | Major | test |
| [HBASE-14005](https://issues.apache.org/jira/browse/HBASE-14005) | Set permission to .top hfile in LoadIncrementalHFiles | Trivial | . |
| [HBASE-13970](https://issues.apache.org/jira/browse/HBASE-13970) | NPE during compaction in trunk | Major | regionserver |
| [HBASE-13895](https://issues.apache.org/jira/browse/HBASE-13895) | DATALOSS: Region assigned before WAL replay when abort | Critical | Recovery, Region Assignment, wal |
| [HBASE-13978](https://issues.apache.org/jira/browse/HBASE-13978) | Variable never assigned in SimpleTotalOrderPartitioner.getPartition() | Major | mapreduce |
| [HBASE-13995](https://issues.apache.org/jira/browse/HBASE-13995) | ServerName is not fully case insensitive | Major | Region Assignment |
| [HBASE-13959](https://issues.apache.org/jira/browse/HBASE-13959) | Region splitting uses a single thread in most common cases | Critical | regionserver |
| [HBASE-13989](https://issues.apache.org/jira/browse/HBASE-13989) | Threshold for combined MemStore and BlockCache percentages is not checked | Major | regionserver |
| [HBASE-13930](https://issues.apache.org/jira/browse/HBASE-13930) | Exclude Findbugs packages from shaded jars | Major | build, Client |
| [HBASE-13863](https://issues.apache.org/jira/browse/HBASE-13863) | Multi-wal feature breaks reported number and size of HLogs | Major | regionserver, UI |
| [HBASE-13974](https://issues.apache.org/jira/browse/HBASE-13974) | TestRateLimiter#testFixedIntervalResourceAvailability may fail | Minor | test |
| [HBASE-13969](https://issues.apache.org/jira/browse/HBASE-13969) | AuthenticationTokenSecretManager is never stopped in RPCServer | Minor | . |
| [HBASE-13923](https://issues.apache.org/jira/browse/HBASE-13923) | Loaded region coprocessors are not reported in shell status command | Major | regionserver, shell |
| [HBASE-13893](https://issues.apache.org/jira/browse/HBASE-13893) | Replace HTable with Table in client tests | Major | Client, test |
| [HBASE-13835](https://issues.apache.org/jira/browse/HBASE-13835) | KeyValueHeap.current might be in heap when exception happens in pollRealKV | Major | Scanners |
| [HBASE-13945](https://issues.apache.org/jira/browse/HBASE-13945) | Prefix\_Tree seekBefore() does not work correctly | Major | io |
| [HBASE-13958](https://issues.apache.org/jira/browse/HBASE-13958) | RESTApiClusterManager calls kill() instead of suspend() and resume() | Minor | integration tests |
| [HBASE-13938](https://issues.apache.org/jira/browse/HBASE-13938) | Deletes done during the region merge transaction may get eclipsed | Major | master, regionserver |
| [HBASE-13933](https://issues.apache.org/jira/browse/HBASE-13933) | DBE's seekBefore with tags corrupts the tag's offset information thus leading to incorrect results | Critical | io |
| [HBASE-13877](https://issues.apache.org/jira/browse/HBASE-13877) | Interrupt to flush from TableFlushProcedure causes dataloss in ITBLL | Blocker | integration tests, proc-v2 |
| [HBASE-13918](https://issues.apache.org/jira/browse/HBASE-13918) | Fix hbase:namespace description in webUI | Trivial | hbase |
| [HBASE-13885](https://issues.apache.org/jira/browse/HBASE-13885) | ZK watches leaks during snapshots | Critical | snapshots |
| [HBASE-13737](https://issues.apache.org/jira/browse/HBASE-13737) | [HBase MOB] MOBTable cloned from a snapshot leads to data loss, when that actual snapshot and main table is deleted. | Critical | mob |
| [HBASE-13913](https://issues.apache.org/jira/browse/HBASE-13913) | RAT exclusion list missing asciidoctor support files | Major | . |
| [HBASE-13279](https://issues.apache.org/jira/browse/HBASE-13279) | Add src/main/asciidoc/asciidoctor.css to RAT exclusion list in POM | Minor | documentation |
| [HBASE-13821](https://issues.apache.org/jira/browse/HBASE-13821) | WARN if hbase.bucketcache.percentage.in.combinedcache is set | Minor | regionserver, Usability |
| [HBASE-13888](https://issues.apache.org/jira/browse/HBASE-13888) | Fix refill bug from HBASE-13686 | Major | regionserver |
| [HBASE-13905](https://issues.apache.org/jira/browse/HBASE-13905) | TestRecoveredEdits.testReplayWorksThoughLotsOfFlushing failing consistently on branch-1.1 | Critical | regionserver, test |
| [HBASE-13833](https://issues.apache.org/jira/browse/HBASE-13833) | LoadIncrementalHFile.doBulkLoad(Path,HTable) doesn't handle unmanaged connections when using SecureBulkLoad | Major | tooling |
| [HBASE-13901](https://issues.apache.org/jira/browse/HBASE-13901) | Error while calling watcher on creating and deleting an HBase table | Minor | . |
| [HBASE-13892](https://issues.apache.org/jira/browse/HBASE-13892) | Scanner with all results filtered out results in NPE | Critical | Client |
| [HBASE-13560](https://issues.apache.org/jira/browse/HBASE-13560) | Large compaction queue should steal from small compaction queue when idle | Major | Compaction |
| [HBASE-13878](https://issues.apache.org/jira/browse/HBASE-13878) | Set hbase.fs.tmp.dir config in HBaseTestingUtility.java for Phoenix UT to use | Minor | test |
| [HBASE-13873](https://issues.apache.org/jira/browse/HBASE-13873) | LoadTestTool addAuthInfoToConf throws UnsupportedOperationException | Major | integration tests |
| [HBASE-13875](https://issues.apache.org/jira/browse/HBASE-13875) | Clock skew between master and region server may render restored region without server address | Major | snapshots |
| [HBASE-13845](https://issues.apache.org/jira/browse/HBASE-13845) | Expire of one region server carrying meta can bring down the master | Major | master |
| [HBASE-13847](https://issues.apache.org/jira/browse/HBASE-13847) | getWriteRequestCount function in HRegionServer uses int variable to return the count. | Major | hbase, regionserver |
| [HBASE-13811](https://issues.apache.org/jira/browse/HBASE-13811) | Splitting WALs, we are filtering out too many edits -\> DATALOSS | Critical | wal |
| [HBASE-13853](https://issues.apache.org/jira/browse/HBASE-13853) | ITBLL improvements after HBASE-13811 | Blocker | integration tests, tooling, wal |
| [HBASE-13686](https://issues.apache.org/jira/browse/HBASE-13686) | Fail to limit rate in RateLimiter | Major | Client |
| [HBASE-13851](https://issues.apache.org/jira/browse/HBASE-13851) | RpcClientImpl.close() can hang with cancelled replica RPCs | Major | IPC/RPC |
| [HBASE-13834](https://issues.apache.org/jira/browse/HBASE-13834) | Evict count not properly passed to HeapMemoryTuner. | Major | hbase, regionserver |
| [HBASE-13729](https://issues.apache.org/jira/browse/HBASE-13729) | Old hbase.regionserver.global.memstore.upperLimit and lowerLimit properties are ignored if present | Critical | regionserver |
| [HBASE-13789](https://issues.apache.org/jira/browse/HBASE-13789) | ForeignException should not be sent to the client | Minor | Client, master |
| [HBASE-13779](https://issues.apache.org/jira/browse/HBASE-13779) | Calling table.exists() before table.get() end up with an empty Result | Major | Client |
| [HBASE-13831](https://issues.apache.org/jira/browse/HBASE-13831) | TestHBaseFsck#testParallelHbck is flaky against hadoop 2.6+ | Minor | hbck, test |
| [HBASE-13826](https://issues.apache.org/jira/browse/HBASE-13826) | Unable to create table when group acls are appropriately set. | Major | security |
| [HBASE-13824](https://issues.apache.org/jira/browse/HBASE-13824) | TestGenerateDelegationToken: Master fails to start in Windows environment | Minor | test |
| [HBASE-13647](https://issues.apache.org/jira/browse/HBASE-13647) | Default value for hbase.client.operation.timeout is too high | Blocker | Client |
| [HBASE-13820](https://issues.apache.org/jira/browse/HBASE-13820) | Zookeeper is failing to start | Critical | . |
| [HBASE-13638](https://issues.apache.org/jira/browse/HBASE-13638) | Put copy constructor is shallow | Major | Client |
| [HBASE-13809](https://issues.apache.org/jira/browse/HBASE-13809) | TestRowTooBig should use HDFS directory for its region directory | Minor | test |
| [HBASE-13812](https://issues.apache.org/jira/browse/HBASE-13812) | Deleting of last Column Family of a table should not be allowed | Major | master |
| [HBASE-13813](https://issues.apache.org/jira/browse/HBASE-13813) | Fix Javadoc warnings in Procedure.java | Minor | documentation |
| [HBASE-13776](https://issues.apache.org/jira/browse/HBASE-13776) | Setting illegal versions for HColumnDescriptor does not throw IllegalArgumentException | Major | API |
| [HBASE-13802](https://issues.apache.org/jira/browse/HBASE-13802) | Procedure V2: Master fails to come up due to rollback of create namespace table | Major | master, proc-v2 |
| [HBASE-13796](https://issues.apache.org/jira/browse/HBASE-13796) | ZKUtil doesn't clean quorum setting properly | Minor | . |
| [HBASE-13800](https://issues.apache.org/jira/browse/HBASE-13800) | TestStore#testDeleteExpiredStoreFiles should create unique data/log directory for each call | Minor | test |
| [HBASE-13797](https://issues.apache.org/jira/browse/HBASE-13797) | Fix resource leak in HBaseFsck | Minor | . |
| [HBASE-13801](https://issues.apache.org/jira/browse/HBASE-13801) | Hadoop src checksum is shown instead of HBase src checksum in master / RS UI | Major | UI |
| [HBASE-13723](https://issues.apache.org/jira/browse/HBASE-13723) | In table.rb scanners are never closed. | Major | shell |
| [HBASE-13777](https://issues.apache.org/jira/browse/HBASE-13777) | Table fragmentation display triggers NPE on master status page | Major | UI |
| [HBASE-13778](https://issues.apache.org/jira/browse/HBASE-13778) | BoundedByteBufferPool incorrectly increasing runningAverage buffer length | Major | io, util |
| [HBASE-13732](https://issues.apache.org/jira/browse/HBASE-13732) | TestHBaseFsck#testParallelWithRetriesHbck fails intermittently | Minor | hbck, test |
| [HBASE-13768](https://issues.apache.org/jira/browse/HBASE-13768) | ZooKeeper znodes are bootstrapped with insecure ACLs in a secure configuration | Blocker | security, Zookeeper |
| [HBASE-13767](https://issues.apache.org/jira/browse/HBASE-13767) | Allow ZKAclReset to set and not just clear ZK ACLs | Trivial | Operability, Zookeeper |
| [HBASE-13746](https://issues.apache.org/jira/browse/HBASE-13746) | list\_replicated\_tables command is not listing table in hbase shell. | Major | shell |
| [HBASE-13760](https://issues.apache.org/jira/browse/HBASE-13760) | Cleanup Findbugs keySet iterator warnings | Minor | . |
| [HBASE-13734](https://issues.apache.org/jira/browse/HBASE-13734) | Improper timestamp checking with VisibilityScanDeleteTracker | Major | security |
| [HBASE-13604](https://issues.apache.org/jira/browse/HBASE-13604) | bin/hbase mapredcp does not include yammer-metrics jar | Minor | . |
| [HBASE-13703](https://issues.apache.org/jira/browse/HBASE-13703) | ReplicateContext should not be a member of ReplicationSource | Minor | . |
| [HBASE-13733](https://issues.apache.org/jira/browse/HBASE-13733) | Failed MiniZooKeeperCluster startup did not shutdown ZK servers | Major | Zookeeper |
| [HBASE-13741](https://issues.apache.org/jira/browse/HBASE-13741) | Disable TestRegionObserverInterface#testRecovery and testLegacyRecovery | Minor | . |
| [HBASE-13731](https://issues.apache.org/jira/browse/HBASE-13731) | TestReplicationAdmin should clean up MiniZKCluster resource | Trivial | test |
| [HBASE-13709](https://issues.apache.org/jira/browse/HBASE-13709) | Updates to meta table server columns may be eclipsed | Major | IPC/RPC, regionserver |
| [HBASE-13721](https://issues.apache.org/jira/browse/HBASE-13721) | Improve shell scan performances when using LIMIT | Major | shell |
| [HBASE-13700](https://issues.apache.org/jira/browse/HBASE-13700) | Allow Thrift2 HSHA server to have configurable threads | Major | Thrift |
| [HBASE-13719](https://issues.apache.org/jira/browse/HBASE-13719) | Asynchronous scanner -- cache size-in-bytes bug fix | Major | . |
| [HBASE-13618](https://issues.apache.org/jira/browse/HBASE-13618) | ReplicationSource is too eager to remove sinks | Minor | . |
| [HBASE-13711](https://issues.apache.org/jira/browse/HBASE-13711) | Provide an API to set min and max versions in HColumnDescriptor | Minor | . |
| [HBASE-13722](https://issues.apache.org/jira/browse/HBASE-13722) | Avoid non static method from BloomFilterUtil | Trivial | . |
| [HBASE-13704](https://issues.apache.org/jira/browse/HBASE-13704) | Hbase throws OutOfOrderScannerNextException when MultiRowRangeFilter is used | Major | Client |
| [HBASE-13717](https://issues.apache.org/jira/browse/HBASE-13717) | TestBoundedRegionGroupingProvider#setMembershipDedups need to set HDFS diretory for WAL | Minor | wal |
| [HBASE-13693](https://issues.apache.org/jira/browse/HBASE-13693) | [HBase MOB] Mob files are not encrypting. | Major | mob |
| [HBASE-13694](https://issues.apache.org/jira/browse/HBASE-13694) | CallQueueSize is incorrectly decremented until the response is sent | Major | IPC/RPC, master, regionserver |
| [HBASE-13668](https://issues.apache.org/jira/browse/HBASE-13668) | TestFlushRegionEntry is flaky | Minor | . |
| [HBASE-13699](https://issues.apache.org/jira/browse/HBASE-13699) | Expand information about HBase quotas | Major | documentation |
| [HBASE-13651](https://issues.apache.org/jira/browse/HBASE-13651) | Handle StoreFileScanner FileNotFoundException | Minor | . |
| [HBASE-11830](https://issues.apache.org/jira/browse/HBASE-11830) | TestReplicationThrottler.testThrottling failed on virtual boxes | Minor | test |
| [HBASE-13663](https://issues.apache.org/jira/browse/HBASE-13663) | HMaster fails to restart 'HMaster: Failed to become active master' | Major | hbase |
| [HBASE-13217](https://issues.apache.org/jira/browse/HBASE-13217) | Procedure fails due to ZK issue | Major | . |
| [HBASE-13662](https://issues.apache.org/jira/browse/HBASE-13662) | RSRpcService.scan() throws an OutOfOrderScannerNext if the scan has a retriable failure | Major | IPC/RPC, regionserver |
| [HBASE-13533](https://issues.apache.org/jira/browse/HBASE-13533) | section on configuring ~/.m2/settings.xml has no anchor | Trivial | documentation |
| [HBASE-13661](https://issues.apache.org/jira/browse/HBASE-13661) | Correct binary compatibility issues discovered in 1.1.0RC0 | Major | . |
| [HBASE-13606](https://issues.apache.org/jira/browse/HBASE-13606) | AssignmentManager.assign() is not sync in both path | Major | Region Assignment |
| [HBASE-13635](https://issues.apache.org/jira/browse/HBASE-13635) | Regions stuck in transition because master is incorrectly assumed dead | Major | master, regionserver |
| [HBASE-13634](https://issues.apache.org/jira/browse/HBASE-13634) | Avoid unsafe reference equality checks to EMPTY byte[] | Major | Compaction, Scanners |
| [HBASE-1989](https://issues.apache.org/jira/browse/HBASE-1989) | Admin (et al.) not accurate with Column vs. Column-Family usage | Minor | Client |
| [HBASE-13580](https://issues.apache.org/jira/browse/HBASE-13580) | region\_mover.rb broken with TypeError: no public constructors for Java::OrgApacheHadoopHbaseClient::HTable | Major | scripts |
| [HBASE-13611](https://issues.apache.org/jira/browse/HBASE-13611) | update clover to work for current versions | Minor | build |
| [HBASE-13653](https://issues.apache.org/jira/browse/HBASE-13653) | Uninitialized HRegionServer#walFactory may result in NullPointerException at region server startup​ | Major | hbase |
| [HBASE-13612](https://issues.apache.org/jira/browse/HBASE-13612) | TestRegionFavoredNodes doesn't guard against setup failure | Minor | test |
| [HBASE-13649](https://issues.apache.org/jira/browse/HBASE-13649) | CellComparator.compareTimestamps javadoc inconsistent and wrong | Minor | documentation |
| [HBASE-13648](https://issues.apache.org/jira/browse/HBASE-13648) | test-patch.sh should ignore 'protobuf.generated' | Minor | build |
| [HBASE-13630](https://issues.apache.org/jira/browse/HBASE-13630) | Remove dead code in BufferedDataEncoder | Minor | . |
| [HBASE-13576](https://issues.apache.org/jira/browse/HBASE-13576) | HBCK enhancement: Failure in checking one region should not fail the entire HBCK operation. | Major | hbck |
| [HBASE-13625](https://issues.apache.org/jira/browse/HBASE-13625) | Use HDFS for HFileOutputFormat2 partitioner's path | Major | mapreduce |
| [HBASE-13633](https://issues.apache.org/jira/browse/HBASE-13633) | draining\_servers.rb broken with NoMethodError: undefined method 'getServerInfo' | Major | scripts |
| [HBASE-13628](https://issues.apache.org/jira/browse/HBASE-13628) | Use AtomicLong as size in BoundedConcurrentLinkedQueue | Major | util |
| [HBASE-13617](https://issues.apache.org/jira/browse/HBASE-13617) | TestReplicaWithCluster.testChangeTable timeout | Major | test |
| [HBASE-13599](https://issues.apache.org/jira/browse/HBASE-13599) | The Example Provided in Section 69: Examples of the Documentation Does Not Compile | Minor | documentation |
| [HBASE-13333](https://issues.apache.org/jira/browse/HBASE-13333) | Renew Scanner Lease without advancing the RegionScanner | Major | . |
| [HBASE-13607](https://issues.apache.org/jira/browse/HBASE-13607) | TestSplitLogManager.testGetPreviousRecoveryMode consistently failing | Minor | test |
| [HBASE-12413](https://issues.apache.org/jira/browse/HBASE-12413) | Mismatch in the equals and hashcode methods of KeyValue | Minor | . |
| [HBASE-13312](https://issues.apache.org/jira/browse/HBASE-13312) | SmallScannerCallable does not increment scan metrics | Major | Client, Scanners |
| [HBASE-13608](https://issues.apache.org/jira/browse/HBASE-13608) | 413 Error with Stargate through Knox, using AD, SPNEGO, and Pre-Auth | Major | REST |
| [HBASE-13601](https://issues.apache.org/jira/browse/HBASE-13601) | Connection leak during log splitting | Major | wal |
| [HBASE-13600](https://issues.apache.org/jira/browse/HBASE-13600) | check\_compatibility.sh should ignore shaded jars | Minor | build |
| [HBASE-13595](https://issues.apache.org/jira/browse/HBASE-13595) | Fix Javadoc warn induced in Bytes.java | Trivial | . |
| [HBASE-13564](https://issues.apache.org/jira/browse/HBASE-13564) | Master MBeans are not published | Major | master, metrics |
| [HBASE-13596](https://issues.apache.org/jira/browse/HBASE-13596) | src assembly does not build | Major | build |
| [HBASE-13594](https://issues.apache.org/jira/browse/HBASE-13594) | MultiRowRangeFilter shouldn't call HBaseZeroCopyByteString.wrap() directly | Major | . |
| [HBASE-13577](https://issues.apache.org/jira/browse/HBASE-13577) | Documentation is pointing to wrong port for Master Web UI | Minor | documentation |
| [HBASE-13585](https://issues.apache.org/jira/browse/HBASE-13585) | HRegionFileSystem#splitStoreFile() finishes without closing the file handle in some situation | Major | regionserver |
| [HBASE-13589](https://issues.apache.org/jira/browse/HBASE-13589) | [WINDOWS] hbase.cmd script is broken | Major | . |
| [HBASE-13417](https://issues.apache.org/jira/browse/HBASE-13417) | batchCoprocessorService() does not handle NULL keys | Minor | Coprocessors |
| [HBASE-13517](https://issues.apache.org/jira/browse/HBASE-13517) | Publish a client artifact with shaded dependencies | Major | . |
| [HBASE-13575](https://issues.apache.org/jira/browse/HBASE-13575) | TestChoreService has to make sure that the opened ChoreService is closed for each unit test | Trivial | . |
| [HBASE-13394](https://issues.apache.org/jira/browse/HBASE-13394) | Failed to recreate a table when quota is enabled | Major | security |
| [HBASE-13490](https://issues.apache.org/jira/browse/HBASE-13490) | foreground daemon start re-executes ulimit output | Minor | scripts |
| [HBASE-13359](https://issues.apache.org/jira/browse/HBASE-13359) | Update ACL matrix to include table owner. | Minor | documentation |
| [HBASE-13149](https://issues.apache.org/jira/browse/HBASE-13149) | HBase MR is broken on Hadoop 2.5+ Yarn | Blocker | . |
| [HBASE-13546](https://issues.apache.org/jira/browse/HBASE-13546) | NPE on region server status page if all masters are down | Major | regionserver |
| [HBASE-13555](https://issues.apache.org/jira/browse/HBASE-13555) | StackServlet produces 500 error | Major | . |
| [HBASE-13523](https://issues.apache.org/jira/browse/HBASE-13523) | API Doumentation formatting is broken | Minor | documentation |
| [HBASE-13528](https://issues.apache.org/jira/browse/HBASE-13528) | A bug on selecting compaction pool | Minor | Compaction |
| [HBASE-13526](https://issues.apache.org/jira/browse/HBASE-13526) | TestRegionServerReportForDuty can be flaky: hang or timeout | Minor | test |
| [HBASE-13527](https://issues.apache.org/jira/browse/HBASE-13527) | The default value for hbase.client.scanner.max.result.size is never actually set on Scans | Major | . |
| [HBASE-13437](https://issues.apache.org/jira/browse/HBASE-13437) | ThriftServer leaks ZooKeeper connections | Major | Thrift |
| [HBASE-13524](https://issues.apache.org/jira/browse/HBASE-13524) | TestReplicationAdmin fails on JDK 1.8 | Major | . |
| [HBASE-13499](https://issues.apache.org/jira/browse/HBASE-13499) | AsyncRpcClient test cases failure in powerpc | Major | IPC/RPC |
| [HBASE-13471](https://issues.apache.org/jira/browse/HBASE-13471) | Fix a possible infinite loop in doMiniBatchMutation | Major | . |
| [HBASE-13520](https://issues.apache.org/jira/browse/HBASE-13520) | NullPointerException in TagRewriteCell | Major | . |
| [HBASE-13482](https://issues.apache.org/jira/browse/HBASE-13482) | Phoenix is failing to scan tables on secure environments. | Major | . |
| [HBASE-13430](https://issues.apache.org/jira/browse/HBASE-13430) | HFiles that are in use by a table cloned from a snapshot may be deleted when that snapshot is deleted | Critical | hbase |
| [HBASE-13491](https://issues.apache.org/jira/browse/HBASE-13491) | Issue in FuzzyRowFilter#getNextForFuzzyRule | Major | Filters |
| [HBASE-13477](https://issues.apache.org/jira/browse/HBASE-13477) | Create metrics on failed requests | Major | . |
| [HBASE-13486](https://issues.apache.org/jira/browse/HBASE-13486) | region\_status.rb broken with NameError: uninitialized constant IOException | Major | scripts |
| [HBASE-13473](https://issues.apache.org/jira/browse/HBASE-13473) | deleted cells come back alive after the stripe compaction | Blocker | Compaction |
| [HBASE-12006](https://issues.apache.org/jira/browse/HBASE-12006) | [JDK 8] KeyStoreTestUtil#generateCertificate fails due to "subject class type invalid" | Minor | . |
| [HBASE-13460](https://issues.apache.org/jira/browse/HBASE-13460) | Revise the MetaLookupPool executor-related defaults (introduced in HBASE-13036) | Major | . |
| [HBASE-13475](https://issues.apache.org/jira/browse/HBASE-13475) | Small spelling mistake in region\_mover#isSuccessfulScan causes NoMethodError | Trivial | scripts |
| [HBASE-13301](https://issues.apache.org/jira/browse/HBASE-13301) | Possible memory leak in BucketCache | Major | BlockCache |
| [HBASE-13457](https://issues.apache.org/jira/browse/HBASE-13457) | SnapshotExistsException doesn't honor the DoNotRetry | Trivial | Client |
| [HBASE-13423](https://issues.apache.org/jira/browse/HBASE-13423) | Remove duplicate entry for hbase.regionserver.regionSplitLimit in hbase-default.xml | Minor | hbase |
| [HBASE-13275](https://issues.apache.org/jira/browse/HBASE-13275) | Setting hbase.security.authorization to false does not disable authorization | Major | security |
| [HBASE-11544](https://issues.apache.org/jira/browse/HBASE-11544) | [Ergonomics] hbase.client.scanner.caching is dogged and will try to return batch even if it means OOME | Critical | . |
| [HBASE-13414](https://issues.apache.org/jira/browse/HBASE-13414) | TestHCM no longer needs to test for JRE 6. | Minor | test |
| [HBASE-13377](https://issues.apache.org/jira/browse/HBASE-13377) | Canary may generate false alarm on the first region when there are many delete markers | Major | monitoring |
| [HBASE-13289](https://issues.apache.org/jira/browse/HBASE-13289) | typo in splitSuccessCount metric | Major | metrics |
| [HBASE-13299](https://issues.apache.org/jira/browse/HBASE-13299) | Add setReturnResults() to Increment, like Append has | Critical | API |
| [HBASE-13410](https://issues.apache.org/jira/browse/HBASE-13410) | Bug in KeyValueUtil.oswrite() for non Keyvalue cases | Major | . |
| [HBASE-13411](https://issues.apache.org/jira/browse/HBASE-13411) | Misleading error message when request size quota limit exceeds | Minor | . |
| [HBASE-13409](https://issues.apache.org/jira/browse/HBASE-13409) | Add categories to uncategorized tests | Trivial | . |
| [HBASE-13374](https://issues.apache.org/jira/browse/HBASE-13374) | Small scanners (with particular configurations) do not return all rows | Blocker | . |
| [HBASE-13406](https://issues.apache.org/jira/browse/HBASE-13406) | TestAccessController is flaky when create is slow | Minor | security, test |
| [HBASE-13397](https://issues.apache.org/jira/browse/HBASE-13397) | Purge duplicate rpc request thread local | Major | IPC/RPC |
| [HBASE-13382](https://issues.apache.org/jira/browse/HBASE-13382) | IntegrationTestBigLinkedList should use SecureRandom | Major | integration tests |
| [HBASE-13385](https://issues.apache.org/jira/browse/HBASE-13385) | TestGenerateDelegationToken is broken with hadoop 2.8.0 | Major | test |
| [HBASE-13388](https://issues.apache.org/jira/browse/HBASE-13388) | Handling NullPointer in ZKProcedureMemberRpcs while getting ZNode data | Minor | . |
| [HBASE-13058](https://issues.apache.org/jira/browse/HBASE-13058) | Hbase shell command 'scan' for non existent table shows unnecessary info for one unrelated existent table. | Trivial | Client |
| [HBASE-13091](https://issues.apache.org/jira/browse/HBASE-13091) | Split ZK Quorum on Master WebUI | Minor | . |
| [HBASE-13384](https://issues.apache.org/jira/browse/HBASE-13384) | Fix Javadoc warnings introduced by HBASE-12972 | Trivial | . |
| [HBASE-13368](https://issues.apache.org/jira/browse/HBASE-13368) | Hash.java is declared as public Interface - but it should be Private | Trivial | . |
| [HBASE-13383](https://issues.apache.org/jira/browse/HBASE-13383) | TestRegionServerObserver.testCoprocessorHooksInRegionsMerge zombie after HBASE-12975 | Major | . |
| [HBASE-13296](https://issues.apache.org/jira/browse/HBASE-13296) | Fix the deletion of acl notify nodes for namespace. | Minor | . |
| [HBASE-12954](https://issues.apache.org/jira/browse/HBASE-12954) | Ability impaired using HBase on multihomed hosts | Minor | . |
| [HBASE-13317](https://issues.apache.org/jira/browse/HBASE-13317) | Region server reportForDuty stuck looping if there is a master change | Major | regionserver |
| [HBASE-13371](https://issues.apache.org/jira/browse/HBASE-13371) | Fix typo in TestAsyncIPC | Major | test |
| [HBASE-13364](https://issues.apache.org/jira/browse/HBASE-13364) | Make using the default javac on by default | Major | build |
| [HBASE-12993](https://issues.apache.org/jira/browse/HBASE-12993) | Use HBase 1.0 interfaces in hbase-thrift | Major | . |
| [HBASE-13262](https://issues.apache.org/jira/browse/HBASE-13262) | ResultScanner doesn't return all rows in Scan | Blocker | Client |
| [HBASE-13357](https://issues.apache.org/jira/browse/HBASE-13357) | If maxTables/maxRegions exceeds quota in a namespace, throw QuotaExceededException | Minor | . |
| [HBASE-13355](https://issues.apache.org/jira/browse/HBASE-13355) | QA bot reports checking javac twice | Minor | . |
| [HBASE-13328](https://issues.apache.org/jira/browse/HBASE-13328) | LoadIncrementalHFile.doBulkLoad(Path,HTable) should handle managed connections | Major | . |
| [HBASE-13295](https://issues.apache.org/jira/browse/HBASE-13295) | TestInfoServers hang | Major | test |
| [HBASE-8725](https://issues.apache.org/jira/browse/HBASE-8725) | Add total time RPC call metrics | Major | metrics |
| [HBASE-13265](https://issues.apache.org/jira/browse/HBASE-13265) | Make thrift2 usable from c++ | Major | . |
| [HBASE-13326](https://issues.apache.org/jira/browse/HBASE-13326) | Disabled table can't be enabled after HBase is restarted | Blocker | . |
| [HBASE-13325](https://issues.apache.org/jira/browse/HBASE-13325) | Protocol Buffers 2.5 no longer available for download on code.google.com | Major | . |
| [HBASE-13294](https://issues.apache.org/jira/browse/HBASE-13294) | Fix the critical ancient loopholes in security testing infrastructure. | Major | . |
| [HBASE-13311](https://issues.apache.org/jira/browse/HBASE-13311) | TestQuotaThrottle flaky on slow machine | Minor | test |
| [HBASE-13305](https://issues.apache.org/jira/browse/HBASE-13305) | Get(Get get) is not copying the row key | Major | API |
| [HBASE-13331](https://issues.apache.org/jira/browse/HBASE-13331) | Exceptions from DFS client can cause CatalogJanitor to delete referenced files | Blocker | master |
| [HBASE-13273](https://issues.apache.org/jira/browse/HBASE-13273) | Make Result.EMPTY\_RESULT read-only; currently it can be modified | Major | . |
| [HBASE-13321](https://issues.apache.org/jira/browse/HBASE-13321) | Fix flaky TestHBaseFsck | Minor | test |
| [HBASE-13314](https://issues.apache.org/jira/browse/HBASE-13314) | Fix NPE in HMaster.getClusterStatus() | Minor | . |
| [HBASE-13281](https://issues.apache.org/jira/browse/HBASE-13281) | 'hbase.bucketcache.size' description in hbase book is not correct | Major | documentation |
| [HBASE-13315](https://issues.apache.org/jira/browse/HBASE-13315) | BufferedMutator should be @InterfaceAudience.Public | Major | . |
| [HBASE-13309](https://issues.apache.org/jira/browse/HBASE-13309) | Some tests do not reset EnvironmentEdgeManager | Minor | test |
| [HBASE-13308](https://issues.apache.org/jira/browse/HBASE-13308) | Fix flaky TestEndToEndSplitTransaction | Major | flakey, test |
| [HBASE-13282](https://issues.apache.org/jira/browse/HBASE-13282) | Fix the minor issues of running Canary on kerberized environment | Minor | . |
| [HBASE-12867](https://issues.apache.org/jira/browse/HBASE-12867) | Shell does not support custom replication endpoint specification | Major | . |
| [HBASE-13274](https://issues.apache.org/jira/browse/HBASE-13274) | Fix misplaced deprecation in Delete#addXYZ | Major | API |
| [HBASE-13114](https://issues.apache.org/jira/browse/HBASE-13114) | [UNITTEST] TestEnableTableHandler.testDeleteForSureClearsAllTableRowsFromMeta | Major | test |
| [HBASE-13285](https://issues.apache.org/jira/browse/HBASE-13285) | Fix flaky getRegions() in TestAccessController.setUp() | Minor | test |
| [HBASE-13188](https://issues.apache.org/jira/browse/HBASE-13188) | java.lang.ArithmeticException issue in BoundedByteBufferPool.putBuffer | Major | . |
| [HBASE-13200](https://issues.apache.org/jira/browse/HBASE-13200) | Improper configuration can leads to endless lease recovery during failover | Major | MTTR |
| [HBASE-13253](https://issues.apache.org/jira/browse/HBASE-13253) | LoadIncrementalHFiles unify hfiles discovery | Major | Client, mapreduce |
| [HBASE-13229](https://issues.apache.org/jira/browse/HBASE-13229) | Specify bash for local-regionservers.sh and local-master-backup.sh | Minor | scripts |
| [HBASE-13176](https://issues.apache.org/jira/browse/HBASE-13176) | Flakey TestZooKeeper test. | Major | . |
| [HBASE-13093](https://issues.apache.org/jira/browse/HBASE-13093) | Local mode HBase instance doesn't shut down. | Major | . |
| [HBASE-12908](https://issues.apache.org/jira/browse/HBASE-12908) | Typos in MemStoreFlusher javadocs | Trivial | documentation |
| [HBASE-13254](https://issues.apache.org/jira/browse/HBASE-13254) | EnableTableHandler#prepare would not throw TableNotFoundException during recovery | Minor | . |
| [HBASE-13193](https://issues.apache.org/jira/browse/HBASE-13193) | RegionScannerImpl filters should not be reset if a partial Result is returned | Major | . |
| [HBASE-13246](https://issues.apache.org/jira/browse/HBASE-13246) | Correct the assertion for namespace permissions in tearDown method of TestAccessController | Minor | security, test |
| [HBASE-13239](https://issues.apache.org/jira/browse/HBASE-13239) | HBase grant at specific column level does not work for Groups | Major | hbase |
| [HBASE-13242](https://issues.apache.org/jira/browse/HBASE-13242) | TestPerColumnFamilyFlush.testFlushingWhenLogRolling hung | Major | test |
| [HBASE-13227](https://issues.apache.org/jira/browse/HBASE-13227) | LoadIncrementalHFile should skip non-files inside a possible family-dir | Minor | Client, mapreduce |
| [HBASE-13232](https://issues.apache.org/jira/browse/HBASE-13232) | ConnectionManger : Batch pool threads and metaLookup pool threads should use different name pattern | Trivial | . |
| [HBASE-13097](https://issues.apache.org/jira/browse/HBASE-13097) | Use same EventLoopGroup for different AsyncRpcClients if possible | Major | IPC/RPC, test |
| [HBASE-13136](https://issues.apache.org/jira/browse/HBASE-13136) | TestSplitLogManager.testGetPreviousRecoveryMode is flakey | Major | . |
| [HBASE-13224](https://issues.apache.org/jira/browse/HBASE-13224) | Minor formatting issue when logging a namespace scope in AuthResult#toContextString | Trivial | Coprocessors, security |
| [HBASE-13194](https://issues.apache.org/jira/browse/HBASE-13194) | TableNamespaceManager not ready cause MasterQuotaManager initialization fail | Major | master |
| [HBASE-13218](https://issues.apache.org/jira/browse/HBASE-13218) | Correct the syntax shown for using ExportSnapshot tool in the book | Minor | documentation |
| [HBASE-13167](https://issues.apache.org/jira/browse/HBASE-13167) | The check for balancerCutoffTime is buggy | Trivial | Balancer |
| [HBASE-13192](https://issues.apache.org/jira/browse/HBASE-13192) | IntegrationTestBulkLoad doesn't wait for table modification sometimes leading to spurious test failures | Major | . |
| [HBASE-13191](https://issues.apache.org/jira/browse/HBASE-13191) | mvn site fails on jenkins due to permgen | Major | . |
| [HBASE-13208](https://issues.apache.org/jira/browse/HBASE-13208) | Patch build should match the patch filename and not the whole relative URL in findBranchNameFromPatchName | Trivial | . |
| [HBASE-13206](https://issues.apache.org/jira/browse/HBASE-13206) | Fix TableLock tableName log format | Trivial | . |
| [HBASE-13165](https://issues.apache.org/jira/browse/HBASE-13165) | Fix docs and scripts for default max heaps size after HBASE-11804 | Minor | documentation, scripts |
| [HBASE-13174](https://issues.apache.org/jira/browse/HBASE-13174) | Apply HBASE-11804 to Windows scripts | Major | scripts |
| [HBASE-13196](https://issues.apache.org/jira/browse/HBASE-13196) | Add info about default number of versions when using the export tool | Major | documentation |
| [HBASE-13181](https://issues.apache.org/jira/browse/HBASE-13181) | TestHRegionReplayEvents.testReplayBulkLoadEvent fails frequently. | Minor | . |
| [HBASE-13186](https://issues.apache.org/jira/browse/HBASE-13186) | HBase build error due to checkstyle | Major | build |
| [HBASE-12931](https://issues.apache.org/jira/browse/HBASE-12931) | The existing KeyValues in memstore are not removed completely after inserting cell into memStore | Minor | . |
| [HBASE-12723](https://issues.apache.org/jira/browse/HBASE-12723) | Update ACL matrix to reflect reality | Major | . |
| [HBASE-13023](https://issues.apache.org/jira/browse/HBASE-13023) | Document multiWAL | Major | documentation, wal |
| [HBASE-12468](https://issues.apache.org/jira/browse/HBASE-12468) | AUTHORIZATIONS should be part of Visibility Label Docs | Major | documentation |
| [HBASE-13135](https://issues.apache.org/jira/browse/HBASE-13135) | Move replication ops mgmt stuff from Javadoc to Ref Guide | Major | documentation, Replication |
| [HBASE-12969](https://issues.apache.org/jira/browse/HBASE-12969) | Parameter Validation is not there for shell script, local-master-backup.sh and local-regionservers.sh | Minor | scripts |
| [HBASE-13084](https://issues.apache.org/jira/browse/HBASE-13084) | Add labels to VisibilityLabelsCache asynchronously causes TestShell flakey | Major | test |
| [HBASE-13150](https://issues.apache.org/jira/browse/HBASE-13150) | TestMasterObserver failing disable table at end of test | Major | test |
| [HBASE-13163](https://issues.apache.org/jira/browse/HBASE-13163) | Add HBase version to header and footer of HTML and PDF docs | Major | documentation |
| [HBASE-13076](https://issues.apache.org/jira/browse/HBASE-13076) | Table can be forcibly enabled in AssignmentManager during table disabling. | Major | master, Region Assignment |
| [HBASE-13155](https://issues.apache.org/jira/browse/HBASE-13155) | Fix TestPrefixTree | Major | test |
| [HBASE-13156](https://issues.apache.org/jira/browse/HBASE-13156) | Fix minor rat violation recently introduced (asciidoctor.css). | Major | . |
| [HBASE-13052](https://issues.apache.org/jira/browse/HBASE-13052) | Explain each region split policy | Major | documentation |
| [HBASE-13146](https://issues.apache.org/jira/browse/HBASE-13146) | Race Condition in ScheduledChore and ChoreService | Major | regionserver |
| [HBASE-13145](https://issues.apache.org/jira/browse/HBASE-13145) | TestNamespaceAuditor.testRegionMerge is flaky | Major | test |
| [HBASE-13139](https://issues.apache.org/jira/browse/HBASE-13139) | Clean up missing JAVA\_HOME message in bin/hbase-config.sh | Trivial | shell |
| [HBASE-13115](https://issues.apache.org/jira/browse/HBASE-13115) | Fix the usage of remote user in thrift doAs implementation. | Major | . |
| [HBASE-13141](https://issues.apache.org/jira/browse/HBASE-13141) | IntegrationTestAcidGuarantees returns incorrect values for getColumnFamilies | Major | integration tests |
| [HBASE-13134](https://issues.apache.org/jira/browse/HBASE-13134) | mutateRow and checkAndMutate apis don't throw region level exceptions | Major | . |
| [HBASE-13123](https://issues.apache.org/jira/browse/HBASE-13123) | Minor bug in ROW bloom filter | Minor | . |
| [HBASE-13133](https://issues.apache.org/jira/browse/HBASE-13133) | NPE when running TestSplitLogManager | Major | . |
| [HBASE-13131](https://issues.apache.org/jira/browse/HBASE-13131) | ReplicationAdmin leaks connections if there's an error in the constructor | Critical | Replication |
| [HBASE-12924](https://issues.apache.org/jira/browse/HBASE-12924) | HRegionServer#MovedRegionsCleaner Chore does not start | Minor | . |
| [HBASE-13119](https://issues.apache.org/jira/browse/HBASE-13119) | FileLink should implement equals | Major | . |
| [HBASE-13112](https://issues.apache.org/jira/browse/HBASE-13112) | quota.rb, security.rb and visibility\_labels.rb leak connection | Major | shell |
| [HBASE-13111](https://issues.apache.org/jira/browse/HBASE-13111) | truncate\_preserve command is failing with undefined method error | Major | shell |
| [HBASE-13102](https://issues.apache.org/jira/browse/HBASE-13102) | Fix Pseudo-distributed Mode which was broken in 1.0.0 | Major | . |
| [HBASE-13048](https://issues.apache.org/jira/browse/HBASE-13048) | Use hbase.crypto.wal.algorithm in SecureProtobufLogReader while decrypting the data | Minor | . |
| [HBASE-13085](https://issues.apache.org/jira/browse/HBASE-13085) | Security issue in the implementation of Rest gataway 'doAs' proxy user support | Critical | REST, security |
| [HBASE-13077](https://issues.apache.org/jira/browse/HBASE-13077) | BoundedCompletionService doesn't pass trace info to server | Major | hbase |
| [HBASE-13083](https://issues.apache.org/jira/browse/HBASE-13083) | Master can be dead-locked while assigning META. | Major | master, Region Assignment |
| [HBASE-12953](https://issues.apache.org/jira/browse/HBASE-12953) | RegionServer is not functionally working with AysncRpcClient in secure mode | Critical | security |
| [HBASE-13001](https://issues.apache.org/jira/browse/HBASE-13001) | NullPointer in master logs for table.jsp | Trivial | . |
| [HBASE-13032](https://issues.apache.org/jira/browse/HBASE-13032) | Migration of states should be performed once META is assigned and onlined. | Major | . |
| [HBASE-13070](https://issues.apache.org/jira/browse/HBASE-13070) | Fix possibly zero length family and qualifier is TestCacheOnWrite | Major | test |
| [HBASE-13081](https://issues.apache.org/jira/browse/HBASE-13081) | Branch precommit builds are not updating to branch head before patch application | Major | . |
| [HBASE-13069](https://issues.apache.org/jira/browse/HBASE-13069) | Thrift Http Server returns an error code of 500 instead of 401 when authentication fails | Minor | . |
| [HBASE-13072](https://issues.apache.org/jira/browse/HBASE-13072) | BucketCache.evictBlock returns true if block does not exist | Major | BlockCache |
| [HBASE-13075](https://issues.apache.org/jira/browse/HBASE-13075) | TableInputFormatBase spuriously warning about multiple initializeTable calls | Minor | mapreduce |
| [HBASE-13036](https://issues.apache.org/jira/browse/HBASE-13036) | Meta scanner should use its own threadpool | Major | . |
| [HBASE-13065](https://issues.apache.org/jira/browse/HBASE-13065) | Increasing -Xmx when running TestDistributedLogSplitting | Major | test |
| [HBASE-13066](https://issues.apache.org/jira/browse/HBASE-13066) | Fix typo in AsyncRpcChannel | Major | IPC/RPC |
| [HBASE-12102](https://issues.apache.org/jira/browse/HBASE-12102) | Duplicate keys in HBase.RegionServer metrics JSON | Minor | . |
| [HBASE-13061](https://issues.apache.org/jira/browse/HBASE-13061) | RegionStates can remove wrong region from server holdings | Major | Region Assignment |
| [HBASE-13050](https://issues.apache.org/jira/browse/HBASE-13050) | Hbase shell create\_namespace command throws ArrayIndexOutOfBoundException for (invalid) empty text input. | Trivial | . |
| [HBASE-12948](https://issues.apache.org/jira/browse/HBASE-12948) | Calling Increment#addColumn on the same column multiple times produces wrong result | Critical | Client, regionserver |
| [HBASE-13040](https://issues.apache.org/jira/browse/HBASE-13040) | Possible failure of TestHMasterRPCException | Major | test |
| [HBASE-13055](https://issues.apache.org/jira/browse/HBASE-13055) | HRegion FIXED\_OVERHEAD missed one boolean | Major | . |
| [HBASE-12412](https://issues.apache.org/jira/browse/HBASE-12412) | update the ref guide(currently Example 10.2) to show "update an existing CF" with the new API modifyFamily in master | Minor | documentation |
| [HBASE-13041](https://issues.apache.org/jira/browse/HBASE-13041) | TestEnableTableHandler should not call AssignmentManager#assign concurrently with master | Major | integration tests |
| [HBASE-13047](https://issues.apache.org/jira/browse/HBASE-13047) | Add "HBase Configuration" link missing on the table details pages | Trivial | Operability |
| [HBASE-13011](https://issues.apache.org/jira/browse/HBASE-13011) | TestLoadIncrementalHFiles is flakey when using AsyncRpcClient as client implementation | Major | . |
| [HBASE-13049](https://issues.apache.org/jira/browse/HBASE-13049) | wal\_roll ruby command doesn't work. | Major | shell |
| [HBASE-13029](https://issues.apache.org/jira/browse/HBASE-13029) | Table state should be deleted from META as a last operation in DeleteTableHandler | Major | master |
| [HBASE-13007](https://issues.apache.org/jira/browse/HBASE-13007) | Fix the test timeouts being caused by ChoreService | Major | . |
| [HBASE-12920](https://issues.apache.org/jira/browse/HBASE-12920) | hadoopqa should compile with different hadoop versions | Major | . |
| [HBASE-12999](https://issues.apache.org/jira/browse/HBASE-12999) | Make foreground\_start return the correct exit code | Major | shell |
| [HBASE-13004](https://issues.apache.org/jira/browse/HBASE-13004) | Make possible to explain why HBaseTestingUtility.waitFor fails | Minor | test |
| [HBASE-12961](https://issues.apache.org/jira/browse/HBASE-12961) | Negative values in read and write region server metrics | Minor | regionserver |
| [HBASE-12964](https://issues.apache.org/jira/browse/HBASE-12964) | Add the ability for hbase-daemon.sh to start in the foreground | Major | . |
| [HBASE-7332](https://issues.apache.org/jira/browse/HBASE-7332) | [webui] HMaster webui should display the number of regions a table has. | Minor | UI |
| [HBASE-12951](https://issues.apache.org/jira/browse/HBASE-12951) | TestHCM.testConnectionClose is flakey when using AsyncRpcClient as client implementation | Major | IPC/RPC |
| [HBASE-12877](https://issues.apache.org/jira/browse/HBASE-12877) | Hbase documentation- a referenced link is not working | Minor | documentation |
| [HBASE-12922](https://issues.apache.org/jira/browse/HBASE-12922) | Post-asciidoc conversion fix-ups part 2 | Major | documentation |
| [HBASE-12902](https://issues.apache.org/jira/browse/HBASE-12902) | Post-asciidoc conversion fix-ups | Major | documentation |
| [HBASE-12903](https://issues.apache.org/jira/browse/HBASE-12903) | Fix configuration which enables secure bulk load | Major | Coprocessors, documentation |
| [HBASE-12871](https://issues.apache.org/jira/browse/HBASE-12871) | Document JDK versions supported by each release missing in new documentation | Minor | documentation |
| [HBASE-12845](https://issues.apache.org/jira/browse/HBASE-12845) | ByteBufferOutputStream should grow as direct buffer if the initial buffer is also direct BB | Minor | . |
| [HBASE-12858](https://issues.apache.org/jira/browse/HBASE-12858) | Remove unneeded files under src/main/docbkx | Major | documentation |
| [HBASE-11983](https://issues.apache.org/jira/browse/HBASE-11983) | HRegion constructors should not create HLog | Major | wal |
| [HBASE-12849](https://issues.apache.org/jira/browse/HBASE-12849) | LoadIncrementalHFiles should use unmanaged connection in branch-1 | Major | mapreduce |
| [HBASE-12777](https://issues.apache.org/jira/browse/HBASE-12777) | Multi-page book has broken links that work in the single-page version | Major | documentation |
| [HBASE-12838](https://issues.apache.org/jira/browse/HBASE-12838) | After HBASE-5162 RSRpcServices accidentally applies mutations twice | Major | . |
| [HBASE-12775](https://issues.apache.org/jira/browse/HBASE-12775) | CompressionTest ate my HFile (sigh!) | Major | test |
| [HBASE-12772](https://issues.apache.org/jira/browse/HBASE-12772) | TestPerColumnFamilyFlush failing | Major | test |
| [HBASE-12749](https://issues.apache.org/jira/browse/HBASE-12749) | Tighten HFileLink api to enable non-snapshot uses | Major | snapshots |
| [HBASE-12734](https://issues.apache.org/jira/browse/HBASE-12734) | TestPerColumnFamilyFlush.testCompareStoreFileCount is flakey | Minor | . |
| [HBASE-12703](https://issues.apache.org/jira/browse/HBASE-12703) | Cleanup TestClientPushback for repeatability | Minor | test |
| [HBASE-12688](https://issues.apache.org/jira/browse/HBASE-12688) | Update site with a bootstrap-based UI | Major | website |
| [HBASE-12682](https://issues.apache.org/jira/browse/HBASE-12682) | compaction thread throttle value is not correct in hbase-default.xml | Major | regionserver |
| [HBASE-12690](https://issues.apache.org/jira/browse/HBASE-12690) | list\_quotas command is failing with not able to load Java class | Major | shell |
| [HBASE-12687](https://issues.apache.org/jira/browse/HBASE-12687) | Book is missing styling | Major | documentation |
| [HBASE-12693](https://issues.apache.org/jira/browse/HBASE-12693) | [docs] nit fix in HBase and MapReduce section | Major | documentation |
| [HBASE-12677](https://issues.apache.org/jira/browse/HBASE-12677) | Update replication docs to clarify terminology | Major | documentation |
| [HBASE-9763](https://issues.apache.org/jira/browse/HBASE-9763) | Scan javadoc doesn't fully capture semantics of start and stop row | Minor | documentation |
| [HBASE-11153](https://issues.apache.org/jira/browse/HBASE-11153) | Document that http webUI's should redirect to https when enabled | Minor | documentation, master, regionserver, UI |
| [HBASE-12540](https://issues.apache.org/jira/browse/HBASE-12540) | TestRegionServerMetrics#testMobMetrics test failure | Major | test |
| [HBASE-12628](https://issues.apache.org/jira/browse/HBASE-12628) | Update instructions for running shell tests using maven. | Minor | documentation, shell |
| [HBASE-12553](https://issues.apache.org/jira/browse/HBASE-12553) | request value is not consistent for restoreSnapshot in audit logs | Minor | security |
| [HBASE-12548](https://issues.apache.org/jira/browse/HBASE-12548) | Improve debuggability of IntegrationTestTimeBoundedRequestsWithRegionReplicas | Minor | . |
| [HBASE-12603](https://issues.apache.org/jira/browse/HBASE-12603) | Remove javadoc warnings introduced due to removal of unused imports | Major | . |
| [HBASE-12474](https://issues.apache.org/jira/browse/HBASE-12474) | Incorrect handling of default namespace in user\_permission command. | Minor | . |
| [HBASE-12552](https://issues.apache.org/jira/browse/HBASE-12552) | listSnapshots should list only owned snapshots for non-super user | Major | snapshots |
| [HBASE-12073](https://issues.apache.org/jira/browse/HBASE-12073) | Shell command user\_permission fails on the table created by user if he is not global admin. | Minor | . |
| [HBASE-12535](https://issues.apache.org/jira/browse/HBASE-12535) | NPE in WALFactory close under contention for getInstance | Major | Replication, wal |
| [HBASE-12532](https://issues.apache.org/jira/browse/HBASE-12532) | TestFilter failing occasionally with ExitCodeException doing chmod since HBASE-10378 | Major | test |
| [HBASE-12421](https://issues.apache.org/jira/browse/HBASE-12421) | Clarify ACL concepts and best practices | Major | documentation, security |
| [HBASE-12488](https://issues.apache.org/jira/browse/HBASE-12488) | Small bug in publish\_hbase\_website.sh script | Minor | scripts |
| [HBASE-12347](https://issues.apache.org/jira/browse/HBASE-12347) | Fix the edge case where Hadoop QA's parsing of attached patches breaks the JIRA status checker in dev-support/rebase\_all\_git\_branches.sh | Minor | scripts |
| [HBASE-12409](https://issues.apache.org/jira/browse/HBASE-12409) | Add actual tunable parameters for finding optimal # of regions per RS | Major | documentation, Performance |
| [HBASE-12397](https://issues.apache.org/jira/browse/HBASE-12397) | CopyTable fails to compile with the Hadoop 1 profile | Major | . |
| [HBASE-12418](https://issues.apache.org/jira/browse/HBASE-12418) | Multiple branches for MOB feature breaking git for case insensitive filesystems | Blocker | . |
| [HBASE-12380](https://issues.apache.org/jira/browse/HBASE-12380) | TestRegionServerNoMaster#testMultipleOpen is flaky after HBASE-11760 | Major | test |
| [HBASE-12326](https://issues.apache.org/jira/browse/HBASE-12326) | Document scanner timeout workarounds in troubleshooting section | Major | documentation |
| [HBASE-12283](https://issues.apache.org/jira/browse/HBASE-12283) | Clean up some checkstyle errors | Major | . |
| [HBASE-12307](https://issues.apache.org/jira/browse/HBASE-12307) | Remove unused Imports in hbase-client and hbase-common | Minor | . |
| [HBASE-12192](https://issues.apache.org/jira/browse/HBASE-12192) | Remove EventHandlerListener | Major | master |
| [HBASE-12186](https://issues.apache.org/jira/browse/HBASE-12186) | Formatting error in Table 8.2. Examples of Visibility Expressions | Major | documentation |
| [HBASE-12216](https://issues.apache.org/jira/browse/HBASE-12216) | Lower closed region logging level | Minor | . |
| [HBASE-12201](https://issues.apache.org/jira/browse/HBASE-12201) | Close the writers in the MOB sweep tool | Minor | . |
| [HBASE-11998](https://issues.apache.org/jira/browse/HBASE-11998) | Document a workflow for cherry-picking a fix to a different branch | Major | documentation |
| [HBASE-12193](https://issues.apache.org/jira/browse/HBASE-12193) | Add missing docbook file to git | Major | documentation |
| [HBASE-12172](https://issues.apache.org/jira/browse/HBASE-12172) | Disable flakey TestRegionReplicaReplicationEndpoint and make fixing it a blocker on 1.0 | Major | test |
| [HBASE-11957](https://issues.apache.org/jira/browse/HBASE-11957) | Backport to 0.94 HBASE-5974 Scanner retry behavior with RPC timeout on next() seems incorrect | Critical | . |
| [HBASE-12030](https://issues.apache.org/jira/browse/HBASE-12030) | Wrong compaction report and assert when MOB compaction switches to minor | Critical | Compaction, regionserver |
| [HBASE-12005](https://issues.apache.org/jira/browse/HBASE-12005) | Split/merge fails if master restarts before PONR | Major | . |
| [HBASE-12027](https://issues.apache.org/jira/browse/HBASE-12027) | The ZooKeeperWatcher in HMobStore only uses the default conf | Major | . |
| [HBASE-11987](https://issues.apache.org/jira/browse/HBASE-11987) | Make zk-less table states backward compatible. | Major | . |
| [HBASE-11968](https://issues.apache.org/jira/browse/HBASE-11968) | If MOB is enabled, it should make sure hfile v3 is being used. | Major | . |
| [HBASE-11721](https://issues.apache.org/jira/browse/HBASE-11721) | jdiff script no longer works as usage instructions indicate | Major | scripts |
| [HBASE-8674](https://issues.apache.org/jira/browse/HBASE-8674) | JUnit and Surefire TRUNK-HBASE-2 plugins need a new home | Major | build |
| [HBASE-11855](https://issues.apache.org/jira/browse/HBASE-11855) | HBase handbook chapter 18.9 out of date | Minor | documentation |
| [HBASE-11689](https://issues.apache.org/jira/browse/HBASE-11689) | Track meta in transition | Major | Region Assignment |
| [HBASE-11834](https://issues.apache.org/jira/browse/HBASE-11834) | TestHRegionBusyWait.testParallelAppendWithMemStoreFlush fails sporadically | Major | test |
| [HBASE-11732](https://issues.apache.org/jira/browse/HBASE-11732) | Should not preemptively offline a region | Major | Region Assignment |
| [HBASE-11658](https://issues.apache.org/jira/browse/HBASE-11658) | Piped commands to hbase shell should return non-zero if shell command failed. | Major | shell |
| [HBASE-11333](https://issues.apache.org/jira/browse/HBASE-11333) | Remove deprecated class MetaMigrationConvertingToPB | Trivial | master |
| [HBASE-11661](https://issues.apache.org/jira/browse/HBASE-11661) | Quickstart chapter claims standalone mode has multiple processes | Minor | documentation |
| [HBASE-11629](https://issues.apache.org/jira/browse/HBASE-11629) | Operational concerns for Replication should call out ZooKeeper | Major | documentation, Replication |
| [HBASE-11640](https://issues.apache.org/jira/browse/HBASE-11640) | Add syntax highlighting support to HBase Ref Guide programlistings | Major | documentation |
| [HBASE-11648](https://issues.apache.org/jira/browse/HBASE-11648) | Typo of config: hbase.hstore.compaction.ratio in book.xml | Minor | Compaction |
| [HBASE-11539](https://issues.apache.org/jira/browse/HBASE-11539) | Expand info about contributing to and building documentation | Major | documentation |
| [HBASE-11316](https://issues.apache.org/jira/browse/HBASE-11316) | Expand info about compactions beyond HBASE-11120 | Major | Compaction, documentation |
| [HBASE-11522](https://issues.apache.org/jira/browse/HBASE-11522) | Move Replication information into the Ref Guide | Major | documentation |
| [HBASE-11560](https://issues.apache.org/jira/browse/HBASE-11560) | hbase.regionserver.global.memstore.size is documented twice | Major | . |
| [HBASE-11529](https://issues.apache.org/jira/browse/HBASE-11529) | Images and CSS still don't work properly on both html and html-single book | Major | documentation |
| [HBASE-11521](https://issues.apache.org/jira/browse/HBASE-11521) | Modify pom.xml to copy the images/ and css/ directories to the right location for the Ref Guide to see them correctly | Critical | documentation |
| [HBASE-8473](https://issues.apache.org/jira/browse/HBASE-8473) | add note to ref guide about snapshots and ec2 reverse dns requirements. | Major | documentation, snapshots |
| [HBASE-11499](https://issues.apache.org/jira/browse/HBASE-11499) | AsyncProcess.buildDetailedErrorMessage concatenates strings using + in a loop | Trivial | Client |
| [HBASE-11500](https://issues.apache.org/jira/browse/HBASE-11500) | Possible null pointer dereference of regionLocation in ReversedScannerCallable | Minor | Client |
### TESTS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20228](https://issues.apache.org/jira/browse/HBASE-20228) | [Umbrella] Verify 1.2.7 shell works against 2.0.0 server | Blocker | shell |
| [HBASE-20272](https://issues.apache.org/jira/browse/HBASE-20272) | TestAsyncTable#testCheckAndMutateWithTimeRange fails due to TableExistsException | Major | . |
| [HBASE-20107](https://issues.apache.org/jira/browse/HBASE-20107) | Add a test case for HBASE-14317 | Minor | wal |
| [HBASE-20052](https://issues.apache.org/jira/browse/HBASE-20052) | TestRegionOpen#testNonExistentRegionReplica fails due to NPE | Major | . |
| [HBASE-20031](https://issues.apache.org/jira/browse/HBASE-20031) | Unable to run integration test using mvn due to missing HBaseClassTestRule | Major | . |
| [HBASE-19949](https://issues.apache.org/jira/browse/HBASE-19949) | TestRSGroupsWithACL fails with ExceptionInInitializerError | Major | . |
| [HBASE-19869](https://issues.apache.org/jira/browse/HBASE-19869) | Wrong class name used in TestLockManager | Trivial | . |
| [HBASE-19832](https://issues.apache.org/jira/browse/HBASE-19832) | TestConfServlet#testWriteJson fails against hadoop3 due to spelling change | Minor | . |
| [HBASE-19514](https://issues.apache.org/jira/browse/HBASE-19514) | Use random port for TestJMXListener | Minor | . |
| [HBASE-19289](https://issues.apache.org/jira/browse/HBASE-19289) | CommonFSUtils$StreamLacksCapabilityException: hflush when running test against hadoop3 beta1 | Critical | . |
| [HBASE-19342](https://issues.apache.org/jira/browse/HBASE-19342) | fix TestTableBasedReplicationSourceManagerImpl#testRemovePeerMetricsCleanup | Major | test |
| [HBASE-19266](https://issues.apache.org/jira/browse/HBASE-19266) | TestAcidGuarantees should cover adaptive in-memory compaction | Minor | . |
| [HBASE-19288](https://issues.apache.org/jira/browse/HBASE-19288) | Intermittent test failure in TestHStore.testRunDoubleMemStoreCompactors | Major | test |
| [HBASE-19299](https://issues.apache.org/jira/browse/HBASE-19299) | Assert only one Connection is constructed when calculating splits in a MultiTableInputFormat | Minor | test |
| [HBASE-19273](https://issues.apache.org/jira/browse/HBASE-19273) | IntegrationTestBulkLoad#installSlowingCoproc() uses read-only HTableDescriptor | Major | . |
| [HBASE-19248](https://issues.apache.org/jira/browse/HBASE-19248) | TestZooKeeper#testMultipleZK fails due to missing method getKeepAliveZooKeeperWatcher | Critical | Zookeeper |
| [HBASE-19237](https://issues.apache.org/jira/browse/HBASE-19237) | TestMaster.testMasterOpsWhileSplitting fails | Major | . |
| [HBASE-16051](https://issues.apache.org/jira/browse/HBASE-16051) | TestScannerHeartbeatMessages fails on some machines | Major | test |
| [HBASE-19026](https://issues.apache.org/jira/browse/HBASE-19026) | TestLockProcedure#testRemoteNamespaceLockRecovery fails in master | Major | . |
| [HBASE-18902](https://issues.apache.org/jira/browse/HBASE-18902) | TestCoprocessorServiceBackwardCompatibility fails | Major | . |
| [HBASE-18632](https://issues.apache.org/jira/browse/HBASE-18632) | TestMultiParallel#testFlushCommitsWithAbort fails in master branch | Major | test |
| [HBASE-18147](https://issues.apache.org/jira/browse/HBASE-18147) | nightly job to check health of active branches | Major | community, test |
| [HBASE-17806](https://issues.apache.org/jira/browse/HBASE-17806) | TestRSGroups#testMoveServersAndTables is flaky in master branch | Major | . |
| [HBASE-17703](https://issues.apache.org/jira/browse/HBASE-17703) | TestThriftServerCmdLine is flaky in master branch | Major | . |
| [HBASE-17672](https://issues.apache.org/jira/browse/HBASE-17672) | "Grant should set access rights appropriately" test fails | Major | . |
| [HBASE-17657](https://issues.apache.org/jira/browse/HBASE-17657) | TestZKAsyncRegistry is flaky | Major | . |
| [HBASE-17628](https://issues.apache.org/jira/browse/HBASE-17628) | Local mode of mini cluster shouldn't use hdfs | Minor | . |
| [HBASE-17474](https://issues.apache.org/jira/browse/HBASE-17474) | Reduce frequency of NoSuchMethodException when calling setStoragePolicy() | Minor | . |
| [HBASE-17371](https://issues.apache.org/jira/browse/HBASE-17371) | Enhance 'HBaseContextSuite @ distributedScan to test HBase client' with filter | Minor | . |
| [HBASE-17246](https://issues.apache.org/jira/browse/HBASE-17246) | TestSerialReplication#testRegionMerge fails in master branch | Major | . |
| [HBASE-17189](https://issues.apache.org/jira/browse/HBASE-17189) | TestMasterObserver#wasModifyTableActionCalled uses wrong variables | Minor | test |
| [HBASE-17080](https://issues.apache.org/jira/browse/HBASE-17080) | rest.TestTableResource fails in master branch | Major | . |
| [HBASE-17120](https://issues.apache.org/jira/browse/HBASE-17120) | TestAssignmentListener#testAssignmentListener fails | Minor | . |
| [HBASE-16975](https://issues.apache.org/jira/browse/HBASE-16975) | Disable two subtests of TestSerialReplication | Minor | . |
| [HBASE-16274](https://issues.apache.org/jira/browse/HBASE-16274) | Add more peer tests to replication\_admin\_test | Minor | . |
| [HBASE-16781](https://issues.apache.org/jira/browse/HBASE-16781) | Fix flaky TestMasterProcedureWalLease | Minor | proc-v2, test |
| [HBASE-16794](https://issues.apache.org/jira/browse/HBASE-16794) | TestDispatchMergingRegionsProcedure#testMergeRegionsConcurrently is flaky | Minor | test |
| [HBASE-16791](https://issues.apache.org/jira/browse/HBASE-16791) | Fix TestDispatchMergingRegionsProcedure | Minor | test |
| [HBASE-16777](https://issues.apache.org/jira/browse/HBASE-16777) | Fix flaky TestMasterProcedureEvents | Trivial | proc-v2, test |
| [HBASE-16778](https://issues.apache.org/jira/browse/HBASE-16778) | Move testIllegalTableDescriptor out from TestFromClientSide | Trivial | test |
| [HBASE-16776](https://issues.apache.org/jira/browse/HBASE-16776) | Remove duplicated versions of countRow() in tests | Trivial | test |
| [HBASE-16725](https://issues.apache.org/jira/browse/HBASE-16725) | Don't let flushThread hang in TestHRegion | Minor | . |
| [HBASE-16671](https://issues.apache.org/jira/browse/HBASE-16671) | Split TestExportSnapshot | Minor | snapshots, test |
| [HBASE-16349](https://issues.apache.org/jira/browse/HBASE-16349) | TestClusterId may hang during cluster shutdown | Minor | . |
| [HBASE-16634](https://issues.apache.org/jira/browse/HBASE-16634) | Speedup TestExportSnapshot | Minor | snapshots, test |
| [HBASE-16639](https://issues.apache.org/jira/browse/HBASE-16639) | TestProcedureInMemoryChore#testChoreAddAndRemove occasionally fails | Minor | . |
| [HBASE-16418](https://issues.apache.org/jira/browse/HBASE-16418) | Reduce duration of sleep waiting for region reopen in IntegrationTestBulkLoad#installSlowingCoproc() | Minor | . |
| [HBASE-16185](https://issues.apache.org/jira/browse/HBASE-16185) | TestReplicationSmallTests fails in master branch | Major | . |
| [HBASE-16049](https://issues.apache.org/jira/browse/HBASE-16049) | TestRowProcessorEndpoint is failing on Apache Builds | Major | . |
| [HBASE-15939](https://issues.apache.org/jira/browse/HBASE-15939) | Two shell test failures on master | Major | . |
| [HBASE-15923](https://issues.apache.org/jira/browse/HBASE-15923) | Shell rows counter test fails | Major | . |
| [HBASE-15760](https://issues.apache.org/jira/browse/HBASE-15760) | TestBlockEvictionFromClient#testParallelGetsAndScanWithWrappedRegionScanner fails in master branch | Minor | . |
| [HBASE-15679](https://issues.apache.org/jira/browse/HBASE-15679) | Assertion on wrong variable in TestReplicationThrottler#testThrottling | Minor | . |
| [HBASE-13372](https://issues.apache.org/jira/browse/HBASE-13372) | Unit tests for SplitTransaction and RegionMergeTransaction listeners | Major | . |
| [HBASE-15420](https://issues.apache.org/jira/browse/HBASE-15420) | TestCacheConfig failed after HBASE-15338 | Minor | test |
| [HBASE-15192](https://issues.apache.org/jira/browse/HBASE-15192) | TestRegionMergeTransactionOnCluster#testCleanMergeReference is flaky | Minor | . |
| [HBASE-14584](https://issues.apache.org/jira/browse/HBASE-14584) | TestNamespacesInstanceModel fails on jdk8 | Major | REST, test |
| [HBASE-14758](https://issues.apache.org/jira/browse/HBASE-14758) | Add UT case for unchecked error/exception thrown in AsyncProcess#sendMultiAction | Minor | Client, test |
| [HBASE-14728](https://issues.apache.org/jira/browse/HBASE-14728) | TestRowCounter is broken in master | Major | . |
| [HBASE-14688](https://issues.apache.org/jira/browse/HBASE-14688) | Cleanup MOB tests | Trivial | mob |
| [HBASE-14466](https://issues.apache.org/jira/browse/HBASE-14466) | Remove duplicated code from MOB snapshot tests | Trivial | mob, test |
| [HBASE-14344](https://issues.apache.org/jira/browse/HBASE-14344) | Add timeouts to TestHttpServerLifecycle | Minor | test |
| [HBASE-14310](https://issues.apache.org/jira/browse/HBASE-14310) | test-patch.sh should handle spurious non-zero exit code from maven | Minor | . |
| [HBASE-14293](https://issues.apache.org/jira/browse/HBASE-14293) | TestStochasticBalancerJmxMetrics intermittently fails due to port conflict | Minor | . |
| [HBASE-14277](https://issues.apache.org/jira/browse/HBASE-14277) | TestRegionServerHostname.testRegionServerHostname may fail at host with a case sensitive name | Minor | test |
| [HBASE-14210](https://issues.apache.org/jira/browse/HBASE-14210) | Create test for cell level ACLs involving user group | Major | test |
| [HBASE-14200](https://issues.apache.org/jira/browse/HBASE-14200) | Separate RegionReplica subtests of TestStochasticLoadBalancer into TestStochasticLoadBalancer2 | Minor | . |
| [HBASE-14197](https://issues.apache.org/jira/browse/HBASE-14197) | TestRegionServerHostname#testInvalidRegionServerHostnameAbortsServer fails in Jenkins | Minor | . |
| [HBASE-13940](https://issues.apache.org/jira/browse/HBASE-13940) | IntegrationTestBulkLoad needs option to specify output folders used by test | Major | integration tests |
| [HBASE-13609](https://issues.apache.org/jira/browse/HBASE-13609) | TestFastFail is still failing | Major | test |
| [HBASE-13591](https://issues.apache.org/jira/browse/HBASE-13591) | TestHBaseFsck is flakey | Major | hbck |
| [HBASE-13413](https://issues.apache.org/jira/browse/HBASE-13413) | Create an integration test for Replication | Minor | integration tests |
| [HBASE-13280](https://issues.apache.org/jira/browse/HBASE-13280) | TestSecureRPC failed | Minor | . |
| [HBASE-13182](https://issues.apache.org/jira/browse/HBASE-13182) | Test NamespaceAuditor/AccessController create/delete table is flaky | Minor | test |
| [HBASE-13179](https://issues.apache.org/jira/browse/HBASE-13179) | TestMasterObserver deleteTable is flaky | Minor | test |
| [HBASE-13106](https://issues.apache.org/jira/browse/HBASE-13106) | Ensure endpoint-only table coprocessors can be dynamically loaded | Trivial | . |
| [HBASE-12992](https://issues.apache.org/jira/browse/HBASE-12992) | TestChoreService doesn't close services, that can break test on slow virtual hosts. | Major | . |
| [HBASE-12764](https://issues.apache.org/jira/browse/HBASE-12764) | TestPerColumnFamilyFlush#testCompareStoreFileCount may fail due to new table not available | Minor | . |
| [HBASE-11867](https://issues.apache.org/jira/browse/HBASE-11867) | TestSplitLogManager.testUnassignedTimeout is flaky | Minor | . |
| [HBASE-11866](https://issues.apache.org/jira/browse/HBASE-11866) | TestDistributedLogSplitting is flaky | Minor | . |
| [HBASE-11673](https://issues.apache.org/jira/browse/HBASE-11673) | TestIOFencing#testFencingAroundCompactionAfterWALSync fails | Major | . |
| [HBASE-4744](https://issues.apache.org/jira/browse/HBASE-4744) | Remove @Ignore for testLogRollAfterSplitStart | Critical | . |
| [HBASE-11616](https://issues.apache.org/jira/browse/HBASE-11616) | TestNamespaceUpgrade fails in trunk | Major | . |
| [HBASE-11039](https://issues.apache.org/jira/browse/HBASE-11039) | [VisibilityController] Integration test for labeled data set mixing and filtered excise | Critical | . |
| [HBASE-11461](https://issues.apache.org/jira/browse/HBASE-11461) | Compilation errors are not posted back to JIRA during QA run | Minor | . |
### SUB-TASKS:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-20059](https://issues.apache.org/jira/browse/HBASE-20059) | Make sure documentation is updated for the offheap Bucket cache usage | Critical | documentation |
| [HBASE-20454](https://issues.apache.org/jira/browse/HBASE-20454) | [DOC] Add note on perf to upgrade section | Major | . |
| [HBASE-20347](https://issues.apache.org/jira/browse/HBASE-20347) | [DOC] upgrade section should warn about logging changes | Critical | documentation, logging |
| [HBASE-20349](https://issues.apache.org/jira/browse/HBASE-20349) | [DOC] upgrade guide should call out removal of prefix-tree data block encoding | Critical | documentation |
| [HBASE-17554](https://issues.apache.org/jira/browse/HBASE-17554) | Figure 2.0.0 Hadoop Version Support; update refguide | Blocker | documentation |
| [HBASE-20253](https://issues.apache.org/jira/browse/HBASE-20253) | Error message is missing for restore\_snapshot | Minor | shell |
| [HBASE-20380](https://issues.apache.org/jira/browse/HBASE-20380) | Put up 2.0.0RC0 | Major | . |
| [HBASE-20149](https://issues.apache.org/jira/browse/HBASE-20149) | Purge dev javadoc from bin tarball (or make a separate tarball of javadoc) | Critical | build, community, documentation |
| [HBASE-18828](https://issues.apache.org/jira/browse/HBASE-18828) | [2.0] Generate CHANGES.txt | Blocker | . |
| [HBASE-20287](https://issues.apache.org/jira/browse/HBASE-20287) | After cluster startup list\_regions command fails on disabled table | Minor | shell |
| [HBASE-20258](https://issues.apache.org/jira/browse/HBASE-20258) | Shell hangs when scanning a disabled table | Major | . |
| [HBASE-20354](https://issues.apache.org/jira/browse/HBASE-20354) | [DOC] quickstart guide needs to include note about durability checks for standalone mode | Blocker | documentation, hadoop3 |
| [HBASE-17730](https://issues.apache.org/jira/browse/HBASE-17730) | [DOC] Migration to 2.0 for coprocessors | Blocker | documentation, migration |
| [HBASE-20337](https://issues.apache.org/jira/browse/HBASE-20337) | Update the doc on how to setup shortcircuit reads; its stale | Major | . |
| [HBASE-20298](https://issues.apache.org/jira/browse/HBASE-20298) | Doc change in read/write/total accounting metrics | Critical | documentation |
| [HBASE-16848](https://issues.apache.org/jira/browse/HBASE-16848) | Usage for show\_peer\_tableCFs command doesn't include peer | Minor | . |
| [HBASE-20254](https://issues.apache.org/jira/browse/HBASE-20254) | Incorrect help message for merge\_region | Minor | shell |
| [HBASE-17819](https://issues.apache.org/jira/browse/HBASE-17819) | Reduce the heap overhead for BucketCache | Critical | BucketCache |
| [HBASE-20245](https://issues.apache.org/jira/browse/HBASE-20245) | HTrace commands do not work | Major | . |
| [HBASE-20241](https://issues.apache.org/jira/browse/HBASE-20241) | splitormerge\_enabled does not work | Critical | shell |
| [HBASE-20202](https://issues.apache.org/jira/browse/HBASE-20202) | [AMv2] Don't move region if its a split parent or offlined | Critical | amv2 |
| [HBASE-20247](https://issues.apache.org/jira/browse/HBASE-20247) | Set version as 2.0.0 in branch-2.0 in prep for first RC | Major | . |
| [HBASE-20232](https://issues.apache.org/jira/browse/HBASE-20232) | [LOGGING] Formatting around close and flush | Major | . |
| [HBASE-20190](https://issues.apache.org/jira/browse/HBASE-20190) | Fix default for MIGRATE\_TABLE\_STATE\_FROM\_ZK\_KEY | Critical | . |
| [HBASE-20180](https://issues.apache.org/jira/browse/HBASE-20180) | Avoid Class::newInstance | Major | . |
| [HBASE-20178](https://issues.apache.org/jira/browse/HBASE-20178) | [AMv2] Throw exception if hostile environment | Major | amv2 |
| [HBASE-20173](https://issues.apache.org/jira/browse/HBASE-20173) | [AMv2] DisableTableProcedure concurrent to ServerCrashProcedure can deadlock | Critical | amv2 |
| [HBASE-19093](https://issues.apache.org/jira/browse/HBASE-19093) | Check Admin/Table to ensure all operations go via AccessControl | Blocker | . |
| [HBASE-19114](https://issues.apache.org/jira/browse/HBASE-19114) | Split out o.a.h.h.zookeeper from hbase-server and hbase-client | Major | . |
| [HBASE-18758](https://issues.apache.org/jira/browse/HBASE-18758) | [TEST][compat 1-2] Test delegation tokens continue to work when hbase1 going against hbase2 cluster | Critical | API |
| [HBASE-20113](https://issues.apache.org/jira/browse/HBASE-20113) | Move branch-2 version from 2.0.0-beta-2-SNAPSHOT to 2.0.0-beta-2 | Major | . |
| [HBASE-20100](https://issues.apache.org/jira/browse/HBASE-20100) | TestEnableTableProcedure flakey | Major | amv2, flakey |
| [HBASE-19400](https://issues.apache.org/jira/browse/HBASE-19400) | Add missing security checks in MasterRpcServices | Major | . |
| [HBASE-20069](https://issues.apache.org/jira/browse/HBASE-20069) | fix existing findbugs errors in hbase-server | Critical | findbugs |
| [HBASE-20036](https://issues.apache.org/jira/browse/HBASE-20036) | TestAvoidCellReferencesIntoShippedBlocks timed out | Major | . |
| [HBASE-20083](https://issues.apache.org/jira/browse/HBASE-20083) | Fix findbugs error for ReplicationSyncUp | Major | findbugs |
| [HBASE-20019](https://issues.apache.org/jira/browse/HBASE-20019) | Document the ColumnValueFilter | Minor | documentation |
| [HBASE-20048](https://issues.apache.org/jira/browse/HBASE-20048) | Revert serial replication feature | Blocker | Replication |
| [HBASE-20044](https://issues.apache.org/jira/browse/HBASE-20044) | TestClientClusterStatus is flakey | Major | flakey |
| [HBASE-19554](https://issues.apache.org/jira/browse/HBASE-19554) | AbstractTestDLS.testThreeRSAbort sometimes fails in pre commit | Major | Recovery, wal |
| [HBASE-20038](https://issues.apache.org/jira/browse/HBASE-20038) | TestLockProcedure.testTimeout is flakey | Major | proc-v2, test |
| [HBASE-20041](https://issues.apache.org/jira/browse/HBASE-20041) | cannot start mini mapreduce cluster for ITs | Major | . |
| [HBASE-20035](https://issues.apache.org/jira/browse/HBASE-20035) | .TestQuotaStatusRPCs.testQuotaStatusFromMaster failed with NPEs and RuntimeExceptions | Major | . |
| [HBASE-20039](https://issues.apache.org/jira/browse/HBASE-20039) | move testhbasetestingutility mr tests to hbase-mapreduce | Major | . |
| [HBASE-20021](https://issues.apache.org/jira/browse/HBASE-20021) | TestFromClientSideWithCoprocessor is flakey | Major | . |
| [HBASE-20029](https://issues.apache.org/jira/browse/HBASE-20029) | @Ignore TestQuotaThrottle and TestReplicasClient#testCancelOfMultiGet | Major | . |
| [HBASE-20015](https://issues.apache.org/jira/browse/HBASE-20015) | TestMergeTableRegionsProcedure and TestRegionMergeTransactionOnCluster flakey | Major | flakey |
| [HBASE-20013](https://issues.apache.org/jira/browse/HBASE-20013) | TestZKPermissionWatcher is flakey | Major | flakey |
| [HBASE-20014](https://issues.apache.org/jira/browse/HBASE-20014) | TestAdmin1 Times out | Major | . |
| [HBASE-19978](https://issues.apache.org/jira/browse/HBASE-19978) | The keepalive logic is incomplete in ProcedureExecutor | Major | . |
| [HBASE-20011](https://issues.apache.org/jira/browse/HBASE-20011) | Disable TestRestoreSnapshotFromClientWithRegionReplicas; it is flakey. Needs attention. | Major | read replicas |
| [HBASE-19903](https://issues.apache.org/jira/browse/HBASE-19903) | Split TestShell so it will not time out | Major | shell, test |
| [HBASE-20000](https://issues.apache.org/jira/browse/HBASE-20000) | Remove the quantum logic in FairQueue, always put high priority queue in front | Major | proc-v2 |
| [HBASE-19116](https://issues.apache.org/jira/browse/HBASE-19116) | Currently the tail of hfiles with CellComparator\* classname makes it so hbase1 can't open hbase2 written hfiles; fix | Critical | HFile, migration |
| [HBASE-19965](https://issues.apache.org/jira/browse/HBASE-19965) | Fix flaky TestAsyncRegionAdminApi | Critical | . |
| [HBASE-19960](https://issues.apache.org/jira/browse/HBASE-19960) | Doc test timeouts and test categories in hbase2 | Major | . |
| [HBASE-19942](https://issues.apache.org/jira/browse/HBASE-19942) | Fix flaky TestSimpleRpcScheduler | Major | . |
| [HBASE-19956](https://issues.apache.org/jira/browse/HBASE-19956) | Remove category as a consideration timing out tests; set all test to timeout at 10minutes regardless | Major | . |
| [HBASE-19951](https://issues.apache.org/jira/browse/HBASE-19951) | Cleanup the explicit timeout value for test method | Major | . |
| [HBASE-19791](https://issues.apache.org/jira/browse/HBASE-19791) | TestZKAsyncRegistry hangs | Critical | . |
| [HBASE-19840](https://issues.apache.org/jira/browse/HBASE-19840) | Flakey TestMetaWithReplicas | Major | flakey, test |
| [HBASE-19927](https://issues.apache.org/jira/browse/HBASE-19927) | TestFullLogReconstruction flakey | Major | wal |
| [HBASE-19841](https://issues.apache.org/jira/browse/HBASE-19841) | Tests against hadoop3 fail with StreamLacksCapabilityException | Major | . |
| [HBASE-19944](https://issues.apache.org/jira/browse/HBASE-19944) | Fix timeout TestVisibilityLabelsWithCustomVisLabService | Major | . |
| [HBASE-19931](https://issues.apache.org/jira/browse/HBASE-19931) | TestMetaWithReplicas failing 100% of the time in testHBaseFsckWithMetaReplicas | Major | . |
| [HBASE-19837](https://issues.apache.org/jira/browse/HBASE-19837) | Flakey TestRegionLoad | Major | flakey, test |
| [HBASE-19803](https://issues.apache.org/jira/browse/HBASE-19803) | False positive for the HBASE-Find-Flaky-Tests job | Major | . |
| [HBASE-19910](https://issues.apache.org/jira/browse/HBASE-19910) | TestBucketCache TimesOut | Major | . |
| [HBASE-19916](https://issues.apache.org/jira/browse/HBASE-19916) | TestCacheOnWrite Times Out | Major | . |
| [HBASE-19914](https://issues.apache.org/jira/browse/HBASE-19914) | Refactor TestVisibilityLabelsOnNewVersionBehaviorTable | Major | test |
| [HBASE-19868](https://issues.apache.org/jira/browse/HBASE-19868) | TestCoprocessorWhitelistMasterObserver is flakey | Major | flakey, test |
| [HBASE-19908](https://issues.apache.org/jira/browse/HBASE-19908) | TestCoprocessorShortCircuitRPC Timeout.... | Major | . |
| [HBASE-19909](https://issues.apache.org/jira/browse/HBASE-19909) | TestRegionLocationFinder Timeout | Major | . |
| [HBASE-19928](https://issues.apache.org/jira/browse/HBASE-19928) | TestVisibilityLabelsOnNewVersionBehaviorTable fails | Major | test |
| [HBASE-19918](https://issues.apache.org/jira/browse/HBASE-19918) | Promote TestAsyncClusterAdminApi to LargeTests | Major | test |
| [HBASE-19896](https://issues.apache.org/jira/browse/HBASE-19896) | Fix ScanInfo.customize() to update only the requested options | Major | Coprocessors |
| [HBASE-19895](https://issues.apache.org/jira/browse/HBASE-19895) | Add keepDeletedCells option in ScanOptions for customizing scanInfo in pre-hooks | Major | Coprocessors |
| [HBASE-19913](https://issues.apache.org/jira/browse/HBASE-19913) | Split TestStochasticLoadBalancer2 | Major | test |
| [HBASE-19839](https://issues.apache.org/jira/browse/HBASE-19839) | Flakey TestMergeTableRegionsProcedure & TestSplitTableRegionProcedure | Major | flakey, test |
| [HBASE-19911](https://issues.apache.org/jira/browse/HBASE-19911) | Convert some tests from small to medium because they are timing out: TestNettyRpcServer, TestClientClusterStatus, TestCheckTestClasses | Major | . |
| [HBASE-19887](https://issues.apache.org/jira/browse/HBASE-19887) | Do not overwrite the surefire junit listener property in the pom of sub modules | Major | build |
| [HBASE-19891](https://issues.apache.org/jira/browse/HBASE-19891) | Up nightly test run timeout from 6 hours to 8 | Major | . |
| [HBASE-19811](https://issues.apache.org/jira/browse/HBASE-19811) | Fix findbugs and error-prone warnings in hbase-server (branch-2) | Major | . |
| [HBASE-19885](https://issues.apache.org/jira/browse/HBASE-19885) | Promote TestAssignmentManager to LargeTests | Major | . |
| [HBASE-19866](https://issues.apache.org/jira/browse/HBASE-19866) | TestRegionServerReportForDuty doesn't timeout | Major | rpc |
| [HBASE-19882](https://issues.apache.org/jira/browse/HBASE-19882) | Promote TestProcedureManager to MediumTests | Major | test |
| [HBASE-19877](https://issues.apache.org/jira/browse/HBASE-19877) | hbase-common and hbase-zookeeper don't add the log4j.properties to the resource path for testing | Critical | test |
| [HBASE-19870](https://issues.apache.org/jira/browse/HBASE-19870) | Fix the NPE in ReadOnlyZKClient#run | Major | . |
| [HBASE-19881](https://issues.apache.org/jira/browse/HBASE-19881) | Promote TestRegionReplicaReplicationEndpoint to LargeTests | Major | test |
| [HBASE-19880](https://issues.apache.org/jira/browse/HBASE-19880) | Promote TestFuzzyRowFilterEndToEnd to LargeTests | Major | test |
| [HBASE-19879](https://issues.apache.org/jira/browse/HBASE-19879) | Promote TestAcidGuaranteesXXX to LargeTests | Major | test |
| [HBASE-19867](https://issues.apache.org/jira/browse/HBASE-19867) | Split TestStochasticLoadBalancer into several small tests | Major | test |
| [HBASE-19862](https://issues.apache.org/jira/browse/HBASE-19862) | Fix TestTokenAuthentication - fake RegionCoprocessorEnvironment is not of type HasRegionServerServices | Major | . |
| [HBASE-19846](https://issues.apache.org/jira/browse/HBASE-19846) | Fix findbugs and error-prone warnings in hbase-rest (branch-2) | Major | . |
| [HBASE-19845](https://issues.apache.org/jira/browse/HBASE-19845) | Fix findbugs and error-prone warnings in hbase-rsgroup (branch-2) | Major | . |
| [HBASE-19847](https://issues.apache.org/jira/browse/HBASE-19847) | Fix findbugs and error-prone warnings in hbase-thrift (branch-2) | Major | . |
| [HBASE-19827](https://issues.apache.org/jira/browse/HBASE-19827) | Addendum for Flakey TestAssignmentManager | Major | flakey, test |
| [HBASE-18963](https://issues.apache.org/jira/browse/HBASE-18963) | Remove MultiRowMutationProcessor and implement mutateRows... methods using batchMutate() | Major | regionserver |
| [HBASE-19527](https://issues.apache.org/jira/browse/HBASE-19527) | Make ExecutorService threads daemon=true. | Major | . |
| [HBASE-19810](https://issues.apache.org/jira/browse/HBASE-19810) | Fix findbugs and error-prone warnings in hbase-metrics (branch-2) | Major | . |
| [HBASE-19809](https://issues.apache.org/jira/browse/HBASE-19809) | Fix findbugs and error-prone warnings in hbase-procedure (branch-2) | Major | . |
| [HBASE-19793](https://issues.apache.org/jira/browse/HBASE-19793) | Minor improvements on Master/RS startup | Major | . |
| [HBASE-19795](https://issues.apache.org/jira/browse/HBASE-19795) | Move the tests which only need zookeeper in TestZooKeeper to hbase-zookeeper module | Major | . |
| [HBASE-19772](https://issues.apache.org/jira/browse/HBASE-19772) | Do not close connection to zk when there are still pending request in ReadOnlyZKClient | Major | Zookeeper |
| [HBASE-19787](https://issues.apache.org/jira/browse/HBASE-19787) | Fix or disable tests broken in branch-2 so can cut beta-1 | Critical | . |
| [HBASE-19746](https://issues.apache.org/jira/browse/HBASE-19746) | Add default impl to Cell#getType | Critical | . |
| [HBASE-19743](https://issues.apache.org/jira/browse/HBASE-19743) | Disable TestMemstoreLABWithoutPool | Major | test |
| [HBASE-19731](https://issues.apache.org/jira/browse/HBASE-19731) | TestFromClientSide#testCheckAndDeleteWithCompareOp and testNullQualifier are flakey | Critical | test |
| [HBASE-19604](https://issues.apache.org/jira/browse/HBASE-19604) | Fix Checkstyle errors in hbase-protocol-shaded | Minor | . |
| [HBASE-19581](https://issues.apache.org/jira/browse/HBASE-19581) | Fix Checkstyle error in hbase-external-blockcache | Trivial | . |
| [HBASE-19667](https://issues.apache.org/jira/browse/HBASE-19667) | Get rid of MasterEnvironment#supportGroupCPs | Major | Coprocessors |
| [HBASE-19670](https://issues.apache.org/jira/browse/HBASE-19670) | Workaround: Purge User API building from branch-2 so can make a beta-1 | Major | website |
| [HBASE-19428](https://issues.apache.org/jira/browse/HBASE-19428) | Deprecate the compareTo(Row) | Major | . |
| [HBASE-19282](https://issues.apache.org/jira/browse/HBASE-19282) | CellChunkMap Benchmarking and User Interface | Major | . |
| [HBASE-19660](https://issues.apache.org/jira/browse/HBASE-19660) | Up default retries from 10 to 15 and blocking store files limit from 10 to 16 | Major | . |
| [HBASE-19133](https://issues.apache.org/jira/browse/HBASE-19133) | Transfer big cells or upserted/appended cells into MSLAB upon flattening to CellChunkMap | Major | . |
| [HBASE-19653](https://issues.apache.org/jira/browse/HBASE-19653) | Reduce the default hbase.client.start.log.errors.counter | Trivial | defaults |
| [HBASE-19626](https://issues.apache.org/jira/browse/HBASE-19626) | Rename Cell.DataType to Cell.Type | Minor | . |
| [HBASE-19648](https://issues.apache.org/jira/browse/HBASE-19648) | Move branch-2 version from 2.0.0-beta-1-SNAPSHOT to 2.0.0-beta-1 | Major | . |
| [HBASE-19609](https://issues.apache.org/jira/browse/HBASE-19609) | Fix Checkstyle errors in hbase-metrics | Minor | metrics |
| [HBASE-19628](https://issues.apache.org/jira/browse/HBASE-19628) | ByteBufferCell should extend ExtendedCell | Major | . |
| [HBASE-19629](https://issues.apache.org/jira/browse/HBASE-19629) | RawCell#getTags should return the Iterator\<Tag\> in order to avoid iterating through whole tag array at once | Major | . |
| [HBASE-19605](https://issues.apache.org/jira/browse/HBASE-19605) | Fix Checkstyle errors in hbase-metrics-api | Minor | metrics |
| [HBASE-19602](https://issues.apache.org/jira/browse/HBASE-19602) | Cleanup the usage of ReplicationAdmin from document | Minor | . |
| [HBASE-19502](https://issues.apache.org/jira/browse/HBASE-19502) | Make sure we have closed all StoreFileScanners if we fail to open any StoreFileScanners | Major | regionserver, Scanners |
| [HBASE-19591](https://issues.apache.org/jira/browse/HBASE-19591) | Cleanup the usage of ReplicationAdmin from hbase-shell | Major | . |
| [HBASE-10092](https://issues.apache.org/jira/browse/HBASE-10092) | Move to slf4j | Critical | . |
| [HBASE-19575](https://issues.apache.org/jira/browse/HBASE-19575) | add copy constructor to Mutation | Major | . |
| [HBASE-19566](https://issues.apache.org/jira/browse/HBASE-19566) | Fix Checkstyle errors in hbase-client-project | Trivial | . |
| [HBASE-19567](https://issues.apache.org/jira/browse/HBASE-19567) | ClassNotFoundException: org.apache.hadoop.hbase.KeyValue$RawBytesComparator starting 2.0.0 over a 0.98.25 data. | Major | HFile |
| [HBASE-19468](https://issues.apache.org/jira/browse/HBASE-19468) | FNFE during scans and flushes | Critical | regionserver, Scanners |
| [HBASE-19556](https://issues.apache.org/jira/browse/HBASE-19556) | Remove TestAssignmentManager#testGoodSplit, which no longer make sense | Minor | . |
| [HBASE-19494](https://issues.apache.org/jira/browse/HBASE-19494) | Create simple WALKey filter that can be plugged in on the Replication Sink | Major | Replication |
| [HBASE-19480](https://issues.apache.org/jira/browse/HBASE-19480) | Enable Checkstyle in hbase-annotations | Trivial | . |
| [HBASE-19481](https://issues.apache.org/jira/browse/HBASE-19481) | Enable Checkstyle in hbase-error-prone | Trivial | . |
| [HBASE-19538](https://issues.apache.org/jira/browse/HBASE-19538) | Remove unnecessary semicolons in hbase-client | Minor | . |
| [HBASE-19539](https://issues.apache.org/jira/browse/HBASE-19539) | Remove unnecessary semicolons in hbase-common | Minor | . |
| [HBASE-18440](https://issues.apache.org/jira/browse/HBASE-18440) | ITs and Actions modify immutable TableDescriptors | Major | integration tests |
| [HBASE-19112](https://issues.apache.org/jira/browse/HBASE-19112) | Suspect methods on Cell to be deprecated | Blocker | Client |
| [HBASE-19474](https://issues.apache.org/jira/browse/HBASE-19474) | Bring down number of Checkstyle errors in hbase-zookeeper | Minor | Zookeeper |
| [HBASE-19479](https://issues.apache.org/jira/browse/HBASE-19479) | Fix Checkstyle error in hbase-shell | Trivial | shell |
| [HBASE-19497](https://issues.apache.org/jira/browse/HBASE-19497) | Fix findbugs and error-prone warnings in hbase-common (branch-2) | Major | . |
| [HBASE-19498](https://issues.apache.org/jira/browse/HBASE-19498) | Fix findbugs and error-prone warnings in hbase-client (branch-2) | Major | . |
| [HBASE-19272](https://issues.apache.org/jira/browse/HBASE-19272) | Deal with HBCK tests disabled by HBASE-14614 AMv2 when HBCK works again... | Major | hbck |
| [HBASE-15536](https://issues.apache.org/jira/browse/HBASE-15536) | Make AsyncFSWAL as our default WAL | Critical | wal |
| [HBASE-19505](https://issues.apache.org/jira/browse/HBASE-19505) | Disable ByteBufferPool by default at HM | Major | . |
| [HBASE-19462](https://issues.apache.org/jira/browse/HBASE-19462) | Deprecate all addImmutable methods in Put | Major | . |
| [HBASE-19000](https://issues.apache.org/jira/browse/HBASE-19000) | Group multiple block cache clear requests per server | Major | . |
| [HBASE-19213](https://issues.apache.org/jira/browse/HBASE-19213) | Align check and mutate operations in Table and AsyncTable | Minor | API |
| [HBASE-19427](https://issues.apache.org/jira/browse/HBASE-19427) | Add TimeRange support into Append to optimize for counters | Major | . |
| [HBASE-16890](https://issues.apache.org/jira/browse/HBASE-16890) | Analyze the performance of AsyncWAL and fix the same | Blocker | wal |
| [HBASE-19375](https://issues.apache.org/jira/browse/HBASE-19375) | Fix import order in hbase-thrift | Trivial | Thrift |
| [HBASE-19373](https://issues.apache.org/jira/browse/HBASE-19373) | Fix Checkstyle error in hbase-annotations | Trivial | . |
| [HBASE-19360](https://issues.apache.org/jira/browse/HBASE-19360) | Remove unused imports from hbase-zookeeper module | Minor | Zookeeper |
| [HBASE-19301](https://issues.apache.org/jira/browse/HBASE-19301) | Provide way for CPs to create short circuited connection with custom configurations | Major | Coprocessors |
| [HBASE-19439](https://issues.apache.org/jira/browse/HBASE-19439) | Mark ShortCircuitMasterConnection with InterfaceAudience Private | Major | . |
| [HBASE-19430](https://issues.apache.org/jira/browse/HBASE-19430) | Remove the SettableTimestamp and SettableSequenceId | Major | . |
| [HBASE-19295](https://issues.apache.org/jira/browse/HBASE-19295) | The Configuration returned by CPEnv should be read-only. | Major | Coprocessors |
| [HBASE-18112](https://issues.apache.org/jira/browse/HBASE-18112) | Write RequestTooBigException back to client for NettyRpcServer | Major | IPC/RPC |
| [HBASE-19426](https://issues.apache.org/jira/browse/HBASE-19426) | Move has() and setTimestamp() to Mutation | Major | Client |
| [HBASE-19399](https://issues.apache.org/jira/browse/HBASE-19399) | Purge curator dependency from hbase-client | Major | Client, Zookeeper |
| [HBASE-19344](https://issues.apache.org/jira/browse/HBASE-19344) | improve asyncWAL by using Independent thread for netty #IO in FanOutOneBlockAsyncDFSOutput | Major | wal |
| [HBASE-19346](https://issues.apache.org/jira/browse/HBASE-19346) | Use EventLoopGroup to create AsyncFSOutput | Major | wal |
| [HBASE-19362](https://issues.apache.org/jira/browse/HBASE-19362) | Remove unused imports from hbase-thrift module | Minor | Thrift |
| [HBASE-19096](https://issues.apache.org/jira/browse/HBASE-19096) | Add RowMutions batch support in AsyncTable | Major | . |
| [HBASE-17049](https://issues.apache.org/jira/browse/HBASE-17049) | Do not issue sync request when there are still entries in ringbuffer | Critical | wal |
| [HBASE-19242](https://issues.apache.org/jira/browse/HBASE-19242) | Add MOB compact support for AsyncAdmin | Blocker | Admin, mob |
| [HBASE-19122](https://issues.apache.org/jira/browse/HBASE-19122) | preCompact and preFlush can bypass by returning null scanner; shut it down | Critical | Coprocessors, Scanners |
| [HBASE-19313](https://issues.apache.org/jira/browse/HBASE-19313) | Call blockUntilConnected when constructing ZKAsyncRegistry(temporary workaround) | Major | asyncclient, Client, Zookeeper |
| [HBASE-19269](https://issues.apache.org/jira/browse/HBASE-19269) | Reenable TestShellRSGroups | Major | test |
| [HBASE-19276](https://issues.apache.org/jira/browse/HBASE-19276) | RegionPlan should correctly implement equals and hashCode | Major | . |
| [HBASE-18911](https://issues.apache.org/jira/browse/HBASE-18911) | Unify Admin and AsyncAdmin's methods name | Major | . |
| [HBASE-19268](https://issues.apache.org/jira/browse/HBASE-19268) | Enable Replica tests that were disabled by Proc-V2 AM in HBASE-14614 | Major | test |
| [HBASE-19009](https://issues.apache.org/jira/browse/HBASE-19009) | implement modifyTable and enable/disableTableReplication for AsyncAdmin | Major | . |
| [HBASE-18964](https://issues.apache.org/jira/browse/HBASE-18964) | Deprecate RowProcessor and processRowsWithLocks() APIs that take RowProcessor as an argument | Major | regionserver |
| [HBASE-19270](https://issues.apache.org/jira/browse/HBASE-19270) | Reenable TestRegionMergeTransactionOnCluster#testMergeWithReplicas disable by HBASE-14614 | Major | Region Assignment |
| [HBASE-19278](https://issues.apache.org/jira/browse/HBASE-19278) | Reenable cleanup in test teardown in TestAccessController3 disabled by HBASE-14614 | Major | Region Assignment |
| [HBASE-19235](https://issues.apache.org/jira/browse/HBASE-19235) | CoprocessorEnvironment should be exposed to CPs | Minor | Coprocessors |
| [HBASE-19243](https://issues.apache.org/jira/browse/HBASE-19243) | Start mini cluster once before class for TestFIFOCompactionPolicy | Major | test |
| [HBASE-18423](https://issues.apache.org/jira/browse/HBASE-18423) | Fix TestMetaWithReplicas | Major | test |
| [HBASE-18962](https://issues.apache.org/jira/browse/HBASE-18962) | Support atomic BatchOperations through batchMutate() | Major | regionserver |
| [HBASE-19127](https://issues.apache.org/jira/browse/HBASE-19127) | Set State.SPLITTING, MERGING, MERGING\_NEW, SPLITTING\_NEW properly in RegionStatesNode | Major | . |
| [HBASE-19220](https://issues.apache.org/jira/browse/HBASE-19220) | Async tests time out talking to zk; 'clusterid came back null' | Major | test |
| [HBASE-19002](https://issues.apache.org/jira/browse/HBASE-19002) | Introduce more examples to show how to intercept normal region operations | Minor | Coprocessors |
| [HBASE-18624](https://issues.apache.org/jira/browse/HBASE-18624) | Added support for clearing BlockCache based on table name | Major | . |
| [HBASE-19203](https://issues.apache.org/jira/browse/HBASE-19203) | Update Hadoop version used for build to 2.7.4 | Major | . |
| [HBASE-18961](https://issues.apache.org/jira/browse/HBASE-18961) | doMiniBatchMutate() is big, split it into smaller methods | Major | regionserver |
| [HBASE-19197](https://issues.apache.org/jira/browse/HBASE-19197) | Move version on branch-2 from 2.0.0-alpha4 to 2.0.0-beta-1.SNAPSHOT | Major | . |
| [HBASE-18950](https://issues.apache.org/jira/browse/HBASE-18950) | Remove Optional parameters in AsyncAdmin interface | Blocker | Client |
| [HBASE-19131](https://issues.apache.org/jira/browse/HBASE-19131) | Add the ClusterStatus hook and cleanup other hooks which can be replaced by ClusterStatus hook | Major | Coprocessors |
| [HBASE-19095](https://issues.apache.org/jira/browse/HBASE-19095) | Add CP hooks in RegionObserver for in memory compaction | Major | Coprocessors |
| [HBASE-19152](https://issues.apache.org/jira/browse/HBASE-19152) | Update refguide 'how to build an RC' and the make\_rc.sh script | Trivial | build |
| [HBASE-18972](https://issues.apache.org/jira/browse/HBASE-18972) | Use Builder pattern to remove nullable parameters for coprocessor methods in RawAsyncTable interface | Blocker | Client |
| [HBASE-19141](https://issues.apache.org/jira/browse/HBASE-19141) | [compat 1-2] getClusterStatus always return empty ClusterStatus | Critical | API |
| [HBASE-18770](https://issues.apache.org/jira/browse/HBASE-18770) | Remove bypass method in ObserverContext and implement the 'bypass' logic case by case | Critical | Coprocessors |
| [HBASE-18375](https://issues.apache.org/jira/browse/HBASE-18375) | The pool chunks from ChunkCreator are deallocated while in pool because there is no reference to them | Critical | . |
| [HBASE-19136](https://issues.apache.org/jira/browse/HBASE-19136) | Set branch-2 version to 2.0.0-alpha4 from 2.0.0-alpha4-SNAPSHOT | Major | . |
| [HBASE-19031](https://issues.apache.org/jira/browse/HBASE-19031) | Align exist method in Table and AsyncTable interfaces | Critical | asyncclient, Client |
| [HBASE-18995](https://issues.apache.org/jira/browse/HBASE-18995) | Move methods that are for internal usage from CellUtil to Private util class | Critical | . |
| [HBASE-18906](https://issues.apache.org/jira/browse/HBASE-18906) | Provide Region#waitForFlushes API | Critical | Coprocessors |
| [HBASE-19090](https://issues.apache.org/jira/browse/HBASE-19090) | Add config 'hbase.systemtables.compacting.memstore.type' to hbase-default.xml | Major | . |
| [HBASE-19048](https://issues.apache.org/jira/browse/HBASE-19048) | Cleanup MasterObserver hooks which takes IA private params | Major | Coprocessors |
| [HBASE-19029](https://issues.apache.org/jira/browse/HBASE-19029) | Align RPC timout methods in Table and AsyncTableBase | Critical | asyncclient, Client |
| [HBASE-19057](https://issues.apache.org/jira/browse/HBASE-19057) | Fix other code review comments about FilterList Improvement | Blocker | Filters |
| [HBASE-19074](https://issues.apache.org/jira/browse/HBASE-19074) | Miscellaneous Observer cleanups | Major | Coprocessors |
| [HBASE-19070](https://issues.apache.org/jira/browse/HBASE-19070) | temporarily make the mvnsite nightly test non-voting. | Major | build |
| [HBASE-18754](https://issues.apache.org/jira/browse/HBASE-18754) | Get rid of Writable from TimeRangeTracker | Major | . |
| [HBASE-19053](https://issues.apache.org/jira/browse/HBASE-19053) | Split out o.a.h.h.http from hbase-server into a separate module | Major | . |
| [HBASE-19069](https://issues.apache.org/jira/browse/HBASE-19069) | Do not wrap the original CompactionLifeCycleTracker when calling CP hooks | Blocker | Compaction, Coprocessors |
| [HBASE-18873](https://issues.apache.org/jira/browse/HBASE-18873) | Hide protobufs in GlobalQuotaSettings | Critical | . |
| [HBASE-19010](https://issues.apache.org/jira/browse/HBASE-19010) | Reimplement getMasterInfoPort for Admin | Major | Client |
| [HBASE-19045](https://issues.apache.org/jira/browse/HBASE-19045) | Deprecate RegionObserver#postInstantiateDeleteTracker | Major | Coprocessors |
| [HBASE-18977](https://issues.apache.org/jira/browse/HBASE-18977) | Reenable test of filterlist using MUST\_PASS\_ONE and two familyfilters | Blocker | Filters |
| [HBASE-18945](https://issues.apache.org/jira/browse/HBASE-18945) | Make a IA.LimitedPrivate interface for CellComparator | Major | . |
| [HBASE-18960](https://issues.apache.org/jira/browse/HBASE-18960) | A few bug fixes and minor improvements around batchMutate() | Major | regionserver |
| [HBASE-18914](https://issues.apache.org/jira/browse/HBASE-18914) | Remove AsyncAdmin's methods which were already deprecated in Admin interface | Major | . |
| [HBASE-18954](https://issues.apache.org/jira/browse/HBASE-18954) | Make \*CoprocessorHost classes private | Major | Coprocessors |
| [HBASE-18966](https://issues.apache.org/jira/browse/HBASE-18966) | Use non-sync TimeRangeTracker as a replacement for TimeRange in ImmutableSegment | Major | . |
| [HBASE-18747](https://issues.apache.org/jira/browse/HBASE-18747) | Introduce new example and helper classes to tell CP users how to do filtering on scanners | Critical | Coprocessors |
| [HBASE-18411](https://issues.apache.org/jira/browse/HBASE-18411) | Dividing FiterList into two separate sub-classes: FilterListWithOR , FilterListWithAND | Major | Filters |
| [HBASE-18108](https://issues.apache.org/jira/browse/HBASE-18108) | Procedure WALs are archived but not cleaned; fix | Blocker | proc-v2 |
| [HBASE-18867](https://issues.apache.org/jira/browse/HBASE-18867) | maven enforcer plugin needs update to work with jdk9 | Blocker | build |
| [HBASE-18981](https://issues.apache.org/jira/browse/HBASE-18981) | Address issues found by error-prone in hbase-client | Trivial | . |
| [HBASE-18980](https://issues.apache.org/jira/browse/HBASE-18980) | Address issues found by error-prone in hbase-hadoop2-compat | Trivial | . |
| [HBASE-18951](https://issues.apache.org/jira/browse/HBASE-18951) | Use Builder pattern to remove nullable parameters for checkAndXXX methods in RawAsyncTable/AsyncTable interface | Blocker | asyncclient, Client |
| [HBASE-18160](https://issues.apache.org/jira/browse/HBASE-18160) | Fix incorrect logic in FilterList.filterKeyValue | Major | Filters |
| [HBASE-17678](https://issues.apache.org/jira/browse/HBASE-17678) | FilterList with MUST\_PASS\_ONE may lead to redundant cells returned | Major | Filters |
| [HBASE-18957](https://issues.apache.org/jira/browse/HBASE-18957) | add test that confirms 2 FamilyFilters in a FilterList using MUST\_PASS\_ONE operator will return results that match either of the FamilyFilters and revert as needed to make it pass. | Critical | Filters |
| [HBASE-18949](https://issues.apache.org/jira/browse/HBASE-18949) | Remove the CompactionRequest parameter in preCompactSelection | Major | Coprocessors |
| [HBASE-18752](https://issues.apache.org/jira/browse/HBASE-18752) | Recalculate the TimeRange in flushing snapshot to store file | Major | . |
| [HBASE-18909](https://issues.apache.org/jira/browse/HBASE-18909) | Deprecate Admin's methods which used String regex | Major | Admin |
| [HBASE-18931](https://issues.apache.org/jira/browse/HBASE-18931) | Make ObserverContext an interface and remove private/testing methods | Major | Coprocessors |
| [HBASE-18933](https://issues.apache.org/jira/browse/HBASE-18933) | set version number to 2.0.0-alpha4-SNAPSHOT following release of alpha3 | Blocker | build |
| [HBASE-18815](https://issues.apache.org/jira/browse/HBASE-18815) | We need to pass something like CompactionRequest in CP to give user some information about the compaction | Major | Coprocessors |
| [HBASE-18105](https://issues.apache.org/jira/browse/HBASE-18105) | [AMv2] Split/Merge need cleanup; currently they diverge and do not fully embrace AMv2 world | Major | Region Assignment |
| [HBASE-18753](https://issues.apache.org/jira/browse/HBASE-18753) | Introduce the unsynchronized TimeRangeTracker | Major | . |
| [HBASE-18010](https://issues.apache.org/jira/browse/HBASE-18010) | Connect CellChunkMap to be used for flattening in CompactingMemStore | Major | . |
| [HBASE-18807](https://issues.apache.org/jira/browse/HBASE-18807) | Remove PB references from Observers for Quotas | Major | . |
| [HBASE-18786](https://issues.apache.org/jira/browse/HBASE-18786) | FileNotFoundException should not be silently handled for primary region replicas | Major | regionserver, Scanners |
| [HBASE-18823](https://issues.apache.org/jira/browse/HBASE-18823) | Apply RegionInfo to MasterObserver/RegionObserver/WALObserver | Major | Coprocessors |
| [HBASE-17980](https://issues.apache.org/jira/browse/HBASE-17980) | Any HRegionInfo we give out should be immutable | Major | . |
| [HBASE-18821](https://issues.apache.org/jira/browse/HBASE-18821) | Enforcer plugin NPEs again when generating site | Major | website |
| [HBASE-18820](https://issues.apache.org/jira/browse/HBASE-18820) | assembly is missing hbase-replication | Major | build |
| [HBASE-18819](https://issues.apache.org/jira/browse/HBASE-18819) | Set version number to 2.0.0-alpha3 from 2.0.0-alpha3-SNAPSHOT | Major | . |
| [HBASE-14998](https://issues.apache.org/jira/browse/HBASE-14998) | Unify synchronous and asynchronous methods in Admin and cleanup | Blocker | . |
| [HBASE-18718](https://issues.apache.org/jira/browse/HBASE-18718) | Document the coprocessor.Export | Major | Coprocessors, documentation, tooling |
| [HBASE-18750](https://issues.apache.org/jira/browse/HBASE-18750) | Cleanup the docs saying "HTable use write buffer" | Minor | documentation |
| [HBASE-18779](https://issues.apache.org/jira/browse/HBASE-18779) | Move CompareOperator to hbase-client module | Critical | . |
| [HBASE-18769](https://issues.apache.org/jira/browse/HBASE-18769) | Make CompareFilter use generic CompareOperator instead of internal enum | Major | . |
| [HBASE-14997](https://issues.apache.org/jira/browse/HBASE-14997) | Move compareOp and Comparators out of filter to client package | Critical | . |
| [HBASE-18697](https://issues.apache.org/jira/browse/HBASE-18697) | Need a shaded hbase-mapreduce module | Major | mapreduce |
| [HBASE-18749](https://issues.apache.org/jira/browse/HBASE-18749) | Apply the CF specific TimeRange from Scan to filter the segment scanner | Minor | . |
| [HBASE-18739](https://issues.apache.org/jira/browse/HBASE-18739) | Make all TimeRange Constructors InterfaceAudience Private. | Major | API |
| [HBASE-18721](https://issues.apache.org/jira/browse/HBASE-18721) | Cleanup unused configs and private declaration | Minor | . |
| [HBASE-18700](https://issues.apache.org/jira/browse/HBASE-18700) | Document the new changes on mapreduce stuffs | Major | mapreduce |
| [HBASE-18698](https://issues.apache.org/jira/browse/HBASE-18698) | MapreduceDependencyClasspathTool does not include hbase-server as a dependency | Major | mapreduce |
| [HBASE-18692](https://issues.apache.org/jira/browse/HBASE-18692) | [compat 1-2] ByteBufferUtils.copyFromBufferToBuffer goes from void to int | Major | API |
| [HBASE-18691](https://issues.apache.org/jira/browse/HBASE-18691) | [compat 1-2] HCD remove and removeConfiguration change return type | Major | API |
| [HBASE-18688](https://issues.apache.org/jira/browse/HBASE-18688) | Upgrade commons-codec to 1.10 | Major | dependencies |
| [HBASE-16324](https://issues.apache.org/jira/browse/HBASE-16324) | Remove LegacyScanQueryMatcher | Critical | Compaction, regionserver |
| [HBASE-18687](https://issues.apache.org/jira/browse/HBASE-18687) | Add @since 2.0.0 to new classes | Major | API |
| [HBASE-18448](https://issues.apache.org/jira/browse/HBASE-18448) | EndPoint example for refreshing HFiles for stores | Minor | Coprocessors |
| [HBASE-18656](https://issues.apache.org/jira/browse/HBASE-18656) | Address issues found by error-prone in hbase-common | Major | build |
| [HBASE-18658](https://issues.apache.org/jira/browse/HBASE-18658) | Purge hokey hbase Service implementation; use (internal) Guava Service instead | Major | . |
| [HBASE-18347](https://issues.apache.org/jira/browse/HBASE-18347) | Implement a BufferedMutator for async client | Major | asyncclient, Client |
| [HBASE-18503](https://issues.apache.org/jira/browse/HBASE-18503) | Change \*\*\*Util and Master to use TableDescriptor and ColumnFamilyDescriptor | Major | . |
| [HBASE-18103](https://issues.apache.org/jira/browse/HBASE-18103) | [AMv2] If Master gives OPEN to another, if original eventually succeeds, Master will kill it | Critical | master, proc-v2 |
| [HBASE-18489](https://issues.apache.org/jira/browse/HBASE-18489) | Expose scan cursor in RawScanResultConsumer | Major | asyncclient, Client, scan |
| [HBASE-18608](https://issues.apache.org/jira/browse/HBASE-18608) | AsyncConnection should return AsyncAdmin interface instead of the implemenation | Major | Client |
| [HBASE-18595](https://issues.apache.org/jira/browse/HBASE-18595) | Set version in branch-2 from 2.0.0-alpha2-SNAPSHOT to 2.0.0-alpha2 | Major | . |
| [HBASE-18553](https://issues.apache.org/jira/browse/HBASE-18553) | Expose scan cursor for asynchronous scanner | Major | . |
| [HBASE-17994](https://issues.apache.org/jira/browse/HBASE-17994) | Add async client test to Performance Evaluation tool | Major | . |
| [HBASE-18424](https://issues.apache.org/jira/browse/HBASE-18424) | Fix TestAsyncTableGetMultiThreaded | Major | test |
| [HBASE-18238](https://issues.apache.org/jira/browse/HBASE-18238) | Address ruby static analysis for bin directory | Major | . |
| [HBASE-18593](https://issues.apache.org/jira/browse/HBASE-18593) | Tell m2eclipse what to do w/ replacer plugin | Trivial | build |
| [HBASE-18271](https://issues.apache.org/jira/browse/HBASE-18271) | Shade netty | Blocker | rpc |
| [HBASE-18398](https://issues.apache.org/jira/browse/HBASE-18398) | Snapshot operation fails with FileNotFoundException | Major | snapshots |
| [HBASE-18315](https://issues.apache.org/jira/browse/HBASE-18315) | Eliminate the findbugs warnings for hbase-rest | Major | . |
| [HBASE-18102](https://issues.apache.org/jira/browse/HBASE-18102) | [SHELL] Purge close\_region command that allows by-pass of Master | Major | Operability, shell |
| [HBASE-18231](https://issues.apache.org/jira/browse/HBASE-18231) | Deprecate and throw unsupported operation when Admin#closeRegion is called. | Critical | Admin |
| [HBASE-18367](https://issues.apache.org/jira/browse/HBASE-18367) | Reduce ProcedureInfo usage | Major | master, proc-v2 |
| [HBASE-18107](https://issues.apache.org/jira/browse/HBASE-18107) | [AMv2] Remove DispatchMergingRegionsRequest & DispatchMergingRegions | Major | Region Assignment |
| [HBASE-18428](https://issues.apache.org/jira/browse/HBASE-18428) | IntegrationTestDDLMasterFailover uses old-style immutable column descriptors | Major | integration tests |
| [HBASE-18419](https://issues.apache.org/jira/browse/HBASE-18419) | Update IntegrationTestIngestWithMOB and Actions to use ColumnFamily builders for modification | Critical | integration tests |
| [HBASE-18420](https://issues.apache.org/jira/browse/HBASE-18420) | Some methods of Admin don't use ColumnFamilyDescriptor | Major | . |
| [HBASE-17738](https://issues.apache.org/jira/browse/HBASE-17738) | BucketCache startup is slow | Major | BucketCache |
| [HBASE-18308](https://issues.apache.org/jira/browse/HBASE-18308) | Eliminate the findbugs warnings for hbase-server | Major | . |
| [HBASE-18052](https://issues.apache.org/jira/browse/HBASE-18052) | Add document for async admin | Major | Client |
| [HBASE-18229](https://issues.apache.org/jira/browse/HBASE-18229) | create new Async Split API to embrace AM v2 | Critical | proc-v2 |
| [HBASE-18342](https://issues.apache.org/jira/browse/HBASE-18342) | Add coprocessor service support for async admin | Major | Client |
| [HBASE-17922](https://issues.apache.org/jira/browse/HBASE-17922) | TestRegionServerHostname always fails against hadoop 3.0.0-alpha2 | Major | hadoop3 |
| [HBASE-18365](https://issues.apache.org/jira/browse/HBASE-18365) | Eliminate the findbugs warnings for hbase-common | Major | . |
| [HBASE-18343](https://issues.apache.org/jira/browse/HBASE-18343) | Track the remaining unimplemented methods for async admin | Major | Client |
| [HBASE-18268](https://issues.apache.org/jira/browse/HBASE-18268) | Eliminate the findbugs warnings for hbase-client | Major | Client |
| [HBASE-18295](https://issues.apache.org/jira/browse/HBASE-18295) | The result contains the cells across different rows | Blocker | Scanners |
| [HBASE-18318](https://issues.apache.org/jira/browse/HBASE-18318) | Implement updateConfiguration/stopMaster/stopRegionServer/shutdown methods | Major | Client |
| [HBASE-18316](https://issues.apache.org/jira/browse/HBASE-18316) | Implement async admin operations for draining region servers | Major | Client |
| [HBASE-18317](https://issues.apache.org/jira/browse/HBASE-18317) | Implement async admin operations for Normalizer/CleanerChore/CatalogJanitor | Major | Client |
| [HBASE-18319](https://issues.apache.org/jira/browse/HBASE-18319) | Implement getClusterStatus/getRegionLoad/getCompactionState/getLastMajorCompactionTimestamp methods | Major | Client |
| [HBASE-18002](https://issues.apache.org/jira/browse/HBASE-18002) | Investigate why bucket cache filling up in file mode in an exisiting file is slower | Major | BucketCache |
| [HBASE-17201](https://issues.apache.org/jira/browse/HBASE-17201) | Edit of HFileBlock comments and javadoc | Major | documentation |
| [HBASE-18240](https://issues.apache.org/jira/browse/HBASE-18240) | Add hbase-thirdparty, a project with hbase utility including an hbase-shaded-thirdparty module with guava, netty, etc. | Major | dependencies, shading |
| [HBASE-18297](https://issues.apache.org/jira/browse/HBASE-18297) | Provide a AsyncAdminBuilder to create new AsyncAdmin instance | Major | Client |
| [HBASE-18314](https://issues.apache.org/jira/browse/HBASE-18314) | Eliminate the findbugs warnings for hbase-examples | Major | . |
| [HBASE-18264](https://issues.apache.org/jira/browse/HBASE-18264) | Update pom plugins | Major | . |
| [HBASE-18283](https://issues.apache.org/jira/browse/HBASE-18283) | Provide a construct method which accept a thread pool for AsyncAdmin | Major | Client |
| [HBASE-18293](https://issues.apache.org/jira/browse/HBASE-18293) | Only add the spotbugs dependency when jdk8 is active | Major | build |
| [HBASE-18239](https://issues.apache.org/jira/browse/HBASE-18239) | Address ruby static analysis for shell module | Major | . |
| [HBASE-14902](https://issues.apache.org/jira/browse/HBASE-14902) | Revert some of the stringency recently introduced by checkstyle tightening | Major | . |
| [HBASE-18272](https://issues.apache.org/jira/browse/HBASE-18272) | Fix issue about RSGroupBasedLoadBalancer#roundRobinAssignment where BOGUS\_SERVER\_NAME is involved in two groups | Major | Balancer |
| [HBASE-18234](https://issues.apache.org/jira/browse/HBASE-18234) | Revisit the async admin api | Major | Client |
| [HBASE-18221](https://issues.apache.org/jira/browse/HBASE-18221) | Switch from pread to stream should happen under HStore's reentrant lock | Major | Scanners |
| [HBASE-16242](https://issues.apache.org/jira/browse/HBASE-16242) | Upgrade Avro to 1.7.7 | Major | dependencies |
| [HBASE-18104](https://issues.apache.org/jira/browse/HBASE-18104) | [AMv2] Enable aggregation of RPCs (assigns/unassigns, etc.) | Major | Region Assignment |
| [HBASE-18213](https://issues.apache.org/jira/browse/HBASE-18213) | Add documentation about the new async client | Major | asyncclient, Client, documentation |
| [HBASE-18220](https://issues.apache.org/jira/browse/HBASE-18220) | Compaction scanners need not reopen storefile scanners while trying to switch over from pread to stream | Major | Compaction |
| [HBASE-17008](https://issues.apache.org/jira/browse/HBASE-17008) | Examples to make AsyncClient go down easy | Critical | asyncclient, Client |
| [HBASE-18109](https://issues.apache.org/jira/browse/HBASE-18109) | Assign system tables first (priority) | Critical | Region Assignment |
| [HBASE-18008](https://issues.apache.org/jira/browse/HBASE-18008) | Any HColumnDescriptor we give out should be immutable | Major | . |
| [HBASE-18190](https://issues.apache.org/jira/browse/HBASE-18190) | Set version in branch-2 to 2.0.0-alpha-1 | Major | . |
| [HBASE-18191](https://issues.apache.org/jira/browse/HBASE-18191) | Include hbase-metrics-\* in assembly | Major | . |
| [HBASE-16392](https://issues.apache.org/jira/browse/HBASE-16392) | Backup delete fault tolerance | Major | . |
| [HBASE-15160](https://issues.apache.org/jira/browse/HBASE-15160) | Put back HFile's HDFS op latency sampling code and add metrics for monitoring | Critical | . |
| [HBASE-16549](https://issues.apache.org/jira/browse/HBASE-16549) | Procedure v2 - Add new AM metrics | Major | proc-v2, Region Assignment |
| [HBASE-15995](https://issues.apache.org/jira/browse/HBASE-15995) | Separate replication WAL reading from shipping | Major | Replication |
| [HBASE-17530](https://issues.apache.org/jira/browse/HBASE-17530) | Readd TestMergeTableRegionsProcedure mistakenly removed by HBASE-16786 | Critical | test |
| [HBASE-16543](https://issues.apache.org/jira/browse/HBASE-16543) | Separate Create/Modify Table operations from open/reopen regions | Major | master |
| [HBASE-16261](https://issues.apache.org/jira/browse/HBASE-16261) | MultiHFileOutputFormat Enhancement | Major | hbase, mapreduce |
| [HBASE-18115](https://issues.apache.org/jira/browse/HBASE-18115) | Move SaslServer creation to HBaseSaslRpcServer | Major | IPC/RPC |
| [HBASE-18114](https://issues.apache.org/jira/browse/HBASE-18114) | Update the config of TestAsync\*AdminApi to make test stable | Major | Client |
| [HBASE-17066](https://issues.apache.org/jira/browse/HBASE-17066) | Procedure v2 - Add handling of merge region transition to the new AM | Major | proc-v2, Region Assignment |
| [HBASE-18091](https://issues.apache.org/jira/browse/HBASE-18091) | Add API for who currently holds a lock on namespace/ table/ region and log when state is LOCK\_EVENT\_WAIT | Major | proc-v2 |
| [HBASE-18013](https://issues.apache.org/jira/browse/HBASE-18013) | Write response directly instead of creating a fake call when setup connection | Major | IPC/RPC |
| [HBASE-17850](https://issues.apache.org/jira/browse/HBASE-17850) | Backup system repair utility | Major | . |
| [HBASE-18068](https://issues.apache.org/jira/browse/HBASE-18068) | Fix flaky test TestAsyncSnapshotAdminApi | Major | Client |
| [HBASE-18016](https://issues.apache.org/jira/browse/HBASE-18016) | Implement abort for TruncateTableProcedure | Major | proc-v2 |
| [HBASE-18018](https://issues.apache.org/jira/browse/HBASE-18018) | Support abort for all procedures by default | Major | proc-v2 |
| [HBASE-16851](https://issues.apache.org/jira/browse/HBASE-16851) | User-facing documentation for the In-Memory Compaction feature | Major | . |
| [HBASE-16436](https://issues.apache.org/jira/browse/HBASE-16436) | Add the CellChunkMap variant | Major | regionserver |
| [HBASE-18012](https://issues.apache.org/jira/browse/HBASE-18012) | Move RpcServer.Connection to a separated file | Major | IPC/RPC |
| [HBASE-17938](https://issues.apache.org/jira/browse/HBASE-17938) | General fault - tolerance framework for backup/restore operations | Major | . |
| [HBASE-17786](https://issues.apache.org/jira/browse/HBASE-17786) | Create LoadBalancer perf-tests (test balancer algorithm decoupled from workload) | Major | Balancer, proc-v2 |
| [HBASE-17887](https://issues.apache.org/jira/browse/HBASE-17887) | Row-level consistency is broken for read | Blocker | regionserver |
| [HBASE-17917](https://issues.apache.org/jira/browse/HBASE-17917) | Use pread by default for all user scan and switch to streaming read if needed | Major | scan |
| [HBASE-17977](https://issues.apache.org/jira/browse/HBASE-17977) | Enabled Master observer to delete quotas on table deletion by default | Major | . |
| [HBASE-17667](https://issues.apache.org/jira/browse/HBASE-17667) | Implement async flush/compact region methods | Major | Admin, asyncclient, Client |
| [HBASE-17978](https://issues.apache.org/jira/browse/HBASE-17978) | Investigate hbase superuser permissions in the face of quota violation | Major | . |
| [HBASE-17981](https://issues.apache.org/jira/browse/HBASE-17981) | Roll list\_quota\_violations into list\_quota\_snapshots | Major | . |
| [HBASE-17867](https://issues.apache.org/jira/browse/HBASE-17867) | Implement async procedure RPC API(list/exec/abort/isFinished) | Major | Client |
| [HBASE-17263](https://issues.apache.org/jira/browse/HBASE-17263) | Netty based rpc server impl | Major | Performance, rpc |
| [HBASE-17976](https://issues.apache.org/jira/browse/HBASE-17976) | Remove stability annotation from public audience-marked classes | Major | . |
| [HBASE-17955](https://issues.apache.org/jira/browse/HBASE-17955) | Commit Reviewboard comments from Vlad | Major | . |
| [HBASE-17920](https://issues.apache.org/jira/browse/HBASE-17920) | TestFSHDFSUtils always fails against hadoop 3.0.0-alpha2 | Major | hadoop3 |
| [HBASE-17865](https://issues.apache.org/jira/browse/HBASE-17865) | Implement async listSnapshot/deleteSnapshot methods. | Major | Client |
| [HBASE-16942](https://issues.apache.org/jira/browse/HBASE-16942) | Add FavoredStochasticLoadBalancer and FN Candidate generators | Major | FavoredNodes |
| [HBASE-17873](https://issues.apache.org/jira/browse/HBASE-17873) | Change the IA.Public annotation to IA.Private for unstable API | Blocker | API |
| [HBASE-15583](https://issues.apache.org/jira/browse/HBASE-15583) | Any HTableDescriptor we give out should be immutable | Minor | . |
| [HBASE-15143](https://issues.apache.org/jira/browse/HBASE-15143) | Procedure v2 - Web UI displaying queues | Minor | proc-v2, UI |
| [HBASE-17952](https://issues.apache.org/jira/browse/HBASE-17952) | The new options for PE tool do not work | Major | Performance, test |
| [HBASE-16314](https://issues.apache.org/jira/browse/HBASE-16314) | Retry on table snapshot failure during full backup | Major | . |
| [HBASE-17864](https://issues.apache.org/jira/browse/HBASE-17864) | Implement async snapshot/cloneSnapshot/restoreSnapshot methods | Major | Client |
| [HBASE-17915](https://issues.apache.org/jira/browse/HBASE-17915) | Implement async replication admin methods | Major | Client |
| [HBASE-17929](https://issues.apache.org/jira/browse/HBASE-17929) | Add more options for PE tool | Major | Performance, test |
| [HBASE-16438](https://issues.apache.org/jira/browse/HBASE-16438) | Create a cell type so that chunk id is embedded in it | Major | regionserver |
| [HBASE-17925](https://issues.apache.org/jira/browse/HBASE-17925) | mvn assembly:single fails against hadoop3-alpha2 | Major | hadoop3 |
| [HBASE-17866](https://issues.apache.org/jira/browse/HBASE-17866) | Implement async setQuota/getQuota methods. | Major | Client |
| [HBASE-17897](https://issues.apache.org/jira/browse/HBASE-17897) | StripeStoreFileManager#nonOpenRowCompare use the wrong comparison function | Major | . |
| [HBASE-17895](https://issues.apache.org/jira/browse/HBASE-17895) | TestAsyncProcess#testAction fails if unsafe support is false | Trivial | test |
| [HBASE-17896](https://issues.apache.org/jira/browse/HBASE-17896) | The FIXED\_OVERHEAD of Segment is incorrect | Minor | . |
| [HBASE-16477](https://issues.apache.org/jira/browse/HBASE-16477) | Remove Writable interface and related code from WALEdit/WALKey | Major | wal |
| [HBASE-17872](https://issues.apache.org/jira/browse/HBASE-17872) | The MSLABImpl generates the invaild cells when unsafe is not availble | Critical | . |
| [HBASE-17881](https://issues.apache.org/jira/browse/HBASE-17881) | Remove the ByteBufferCellImpl | Minor | test |
| [HBASE-17858](https://issues.apache.org/jira/browse/HBASE-17858) | Update refguide about the IS annotation if necessary | Major | API, documentation |
| [HBASE-16217](https://issues.apache.org/jira/browse/HBASE-16217) | Identify calling user in ObserverContext | Major | Coprocessors, security |
| [HBASE-17857](https://issues.apache.org/jira/browse/HBASE-17857) | Remove IS annotations from IA.Public classes | Major | API |
| [HBASE-17859](https://issues.apache.org/jira/browse/HBASE-17859) | ByteBufferUtils#compareTo is wrong | Critical | . |
| [HBASE-17668](https://issues.apache.org/jira/browse/HBASE-17668) | Implement async assgin/offline/move/unassign methods | Major | Admin, asyncclient, Client |
| [HBASE-17855](https://issues.apache.org/jira/browse/HBASE-17855) | Fix typo in async client implementation | Major | asyncclient, Client |
| [HBASE-17844](https://issues.apache.org/jira/browse/HBASE-17844) | Subset of HBASE-14614, Procedure v2: Core Assignment Manager (non-critical related changes) | Major | Region Assignment |
| [HBASE-17520](https://issues.apache.org/jira/browse/HBASE-17520) | Implement isTableEnabled/Disabled/Available methods | Major | Client |
| [HBASE-17765](https://issues.apache.org/jira/browse/HBASE-17765) | Reviving the merge possibility in the CompactingMemStore | Major | . |
| [HBASE-13395](https://issues.apache.org/jira/browse/HBASE-13395) | Remove HTableInterface | Major | API |
| [HBASE-17669](https://issues.apache.org/jira/browse/HBASE-17669) | Implement async mergeRegion/splitRegion methods. | Major | Admin, asyncclient, Client |
| [HBASE-17809](https://issues.apache.org/jira/browse/HBASE-17809) | cleanup unused class | Major | . |
| [HBASE-17805](https://issues.apache.org/jira/browse/HBASE-17805) | We should remove BoundedByteBufferPool because it is replaced by ByteBufferPool | Minor | . |
| [HBASE-17447](https://issues.apache.org/jira/browse/HBASE-17447) | Automatically delete quota when table is deleted | Major | . |
| [HBASE-17003](https://issues.apache.org/jira/browse/HBASE-17003) | Update book for filesystem use quotas | Major | documentation |
| [HBASE-17794](https://issues.apache.org/jira/browse/HBASE-17794) | Remove lingering "violation" in favor of the accurate "snapshot" | Trivial | . |
| [HBASE-17691](https://issues.apache.org/jira/browse/HBASE-17691) | Add ScanMetrics support for async scan | Major | Client |
| [HBASE-15314](https://issues.apache.org/jira/browse/HBASE-15314) | Allow more than one backing file in bucketcache | Major | BucketCache |
| [HBASE-17790](https://issues.apache.org/jira/browse/HBASE-17790) | Mark ReplicationAdmin's peerAdded and listReplicationPeers as Deprecated | Minor | Replication |
| [HBASE-17740](https://issues.apache.org/jira/browse/HBASE-17740) | Correct the semantic of batch and partial for async client | Critical | asyncclient, Client, scan |
| [HBASE-17338](https://issues.apache.org/jira/browse/HBASE-17338) | Treat Cell data size under global memstore heap size only when that Cell can not be copied to MSLAB | Major | regionserver |
| [HBASE-17745](https://issues.apache.org/jira/browse/HBASE-17745) | Support short circuit connection for master services | Major | . |
| [HBASE-17600](https://issues.apache.org/jira/browse/HBASE-17600) | Implement get/create/modify/delete/list namespace admin operations | Major | Client |
| [HBASE-17002](https://issues.apache.org/jira/browse/HBASE-17002) | [Master] Report quotas and active violations on Master UI and JMX metrics | Major | master, UI |
| [HBASE-17568](https://issues.apache.org/jira/browse/HBASE-17568) | Expire region reports in the HMaster | Major | . |
| [HBASE-15484](https://issues.apache.org/jira/browse/HBASE-15484) | Correct the semantic of batch and partial | Blocker | Client, scan |
| [HBASE-17602](https://issues.apache.org/jira/browse/HBASE-17602) | Tweak chore delay/period defaults | Trivial | . |
| [HBASE-17516](https://issues.apache.org/jira/browse/HBASE-17516) | Table quota not taking precedence over namespace quota | Major | . |
| [HBASE-17646](https://issues.apache.org/jira/browse/HBASE-17646) | Implement Async getRegion method | Major | asyncclient |
| [HBASE-17662](https://issues.apache.org/jira/browse/HBASE-17662) | Disable in-memory flush when replaying from WAL | Major | . |
| [HBASE-17428](https://issues.apache.org/jira/browse/HBASE-17428) | Expand on shell commands for detailed insight | Major | shell |
| [HBASE-16991](https://issues.apache.org/jira/browse/HBASE-16991) | Make the initialization of AsyncConnection asynchronous | Minor | Client |
| [HBASE-17608](https://issues.apache.org/jira/browse/HBASE-17608) | Add suspend support for RawScanResultConsumer | Major | asyncclient, Client, scan |
| [HBASE-17561](https://issues.apache.org/jira/browse/HBASE-17561) | table status page should escape values that may contain arbitrary characters. | Major | master, UI |
| [HBASE-17210](https://issues.apache.org/jira/browse/HBASE-17210) | Set timeout on trying rowlock according to client's RPC timeout | Major | . |
| [HBASE-17478](https://issues.apache.org/jira/browse/HBASE-17478) | Avoid sending FSUtilization reports to master when quota support is not enabled | Trivial | . |
| [HBASE-17025](https://issues.apache.org/jira/browse/HBASE-17025) | [Shell] Support space quota get/set via the shell | Major | shell |
| [HBASE-17644](https://issues.apache.org/jira/browse/HBASE-17644) | Always create ByteBufferCells after copying to MSLAB | Major | regionserver |
| [HBASE-17619](https://issues.apache.org/jira/browse/HBASE-17619) | Add async admin Impl which connect to RegionServer and implement close region methods. | Major | asyncclient |
| [HBASE-17656](https://issues.apache.org/jira/browse/HBASE-17656) | Move new Address class from util to net package | Minor | rsgroup |
| [HBASE-17583](https://issues.apache.org/jira/browse/HBASE-17583) | Add inclusive/exclusive support for startRow and endRow of scan for sync client | Major | Client, scan |
| [HBASE-17259](https://issues.apache.org/jira/browse/HBASE-17259) | Missing functionality to remove space quota | Major | . |
| [HBASE-17001](https://issues.apache.org/jira/browse/HBASE-17001) | [RegionServer] Implement enforcement of quota violation policies | Major | regionserver |
| [HBASE-17575](https://issues.apache.org/jira/browse/HBASE-17575) | Run critical tests with each of the Inmemory Compaction Policies enabled (Towards Making BASIC the Default In-Memory Compaction Policy) | Major | test |
| [HBASE-17484](https://issues.apache.org/jira/browse/HBASE-17484) | Add non cached version of OffheapKV for write path | Major | regionserver |
| [HBASE-17389](https://issues.apache.org/jira/browse/HBASE-17389) | Convert all internal usages from ReplicationAdmin to Admin | Major | . |
| [HBASE-17402](https://issues.apache.org/jira/browse/HBASE-17402) | TestAsyncTableScan sometimes hangs | Major | Client |
| [HBASE-17350](https://issues.apache.org/jira/browse/HBASE-17350) | Fixup of regionserver group-based assignment | Critical | regionserver, rsgroup |
| [HBASE-16999](https://issues.apache.org/jira/browse/HBASE-16999) | [Master] Inform RegionServers on size quota violations | Major | . |
| [HBASE-17596](https://issues.apache.org/jira/browse/HBASE-17596) | Implement add/delete/modify column family methods | Major | Client |
| [HBASE-17349](https://issues.apache.org/jira/browse/HBASE-17349) | Add doc for regionserver group-based assignment | Critical | regionserver, rsgroup |
| [HBASE-17511](https://issues.apache.org/jira/browse/HBASE-17511) | Implement enable/disable table methods | Major | Client |
| [HBASE-17281](https://issues.apache.org/jira/browse/HBASE-17281) | FN should use datanode port from hdfs configuration | Minor | FavoredNodes |
| [HBASE-17198](https://issues.apache.org/jira/browse/HBASE-17198) | FN updates during region merge (follow up to Procedure v2 merge) | Major | FavoredNodes |
| [HBASE-17101](https://issues.apache.org/jira/browse/HBASE-17101) | FavoredNodes should not apply to system tables | Major | FavoredNodes |
| [HBASE-17346](https://issues.apache.org/jira/browse/HBASE-17346) | Add coprocessor service support | Major | asyncclient, Client, Coprocessors |
| [HBASE-17566](https://issues.apache.org/jira/browse/HBASE-17566) | Jetty upgrade fixes | Major | REST, UI |
| [HBASE-17562](https://issues.apache.org/jira/browse/HBASE-17562) | Remove documentation for coprocessor execution times after HBASE-14205 | Major | Coprocessors, Performance, regionserver |
| [HBASE-16998](https://issues.apache.org/jira/browse/HBASE-16998) | [Master] Analyze table use reports and update quota violations | Major | . |
| [HBASE-17557](https://issues.apache.org/jira/browse/HBASE-17557) | HRegionServer#reportRegionSizesForQuotas() should respond to UnsupportedOperationException | Major | . |
| [HBASE-17526](https://issues.apache.org/jira/browse/HBASE-17526) | Procedure v2 - cleanup isSuspended from MasterProcedureScheduler#Queue | Minor | proc-v2 |
| [HBASE-17500](https://issues.apache.org/jira/browse/HBASE-17500) | Implement getTable/creatTable/deleteTable/truncateTable methods | Major | Client |
| [HBASE-17045](https://issues.apache.org/jira/browse/HBASE-17045) | Unify the implementation of small scan and regular scan | Major | Client, scan |
| [HBASE-17443](https://issues.apache.org/jira/browse/HBASE-17443) | Move listReplicated/enableTableRep/disableTableRep methods from ReplicationAdmin to Admin | Major | . |
| [HBASE-17492](https://issues.apache.org/jira/browse/HBASE-17492) | Fix the compacting memstore part in hbase shell ruby script | Major | . |
| [HBASE-17491](https://issues.apache.org/jira/browse/HBASE-17491) | Remove all setters from HTable interface and introduce a TableBuilder to build Table instance | Major | . |
| [HBASE-17067](https://issues.apache.org/jira/browse/HBASE-17067) | Procedure v2 - remove tryAcquire\*Lock and use wait/wake to make framework event based | Major | proc-v2 |
| [HBASE-17367](https://issues.apache.org/jira/browse/HBASE-17367) | Make HTable#getBufferedMutator thread safe | Major | . |
| [HBASE-17497](https://issues.apache.org/jira/browse/HBASE-17497) | Add first async MetaTableAccessor impl and Implement tableExists method | Major | Client |
| [HBASE-17498](https://issues.apache.org/jira/browse/HBASE-17498) | Implement listTables and listTableNames methods | Major | Client |
| [HBASE-16831](https://issues.apache.org/jira/browse/HBASE-16831) | Procedure V2 - Remove org.apache.hadoop.hbase.zookeeper.lock | Minor | . |
| [HBASE-16867](https://issues.apache.org/jira/browse/HBASE-16867) | Procedure V2 - Check ACLs for remote HBaseLock | Major | . |
| [HBASE-17480](https://issues.apache.org/jira/browse/HBASE-17480) | Remove split region code from Region Server | Major | Region Assignment |
| [HBASE-17396](https://issues.apache.org/jira/browse/HBASE-17396) | Add first async admin impl and implement balance methods | Major | Client |
| [HBASE-17483](https://issues.apache.org/jira/browse/HBASE-17483) | Add equals/hashcode for OffheapKeyValue | Major | regionserver |
| [HBASE-17081](https://issues.apache.org/jira/browse/HBASE-17081) | Flush the entire CompactingMemStore content to disk | Major | . |
| [HBASE-17372](https://issues.apache.org/jira/browse/HBASE-17372) | Make AsyncTable thread safe | Major | asyncclient, Client |
| [HBASE-16744](https://issues.apache.org/jira/browse/HBASE-16744) | Procedure V2 - Lock procedures to allow clients to acquire locks on tables/namespaces/regions | Major | . |
| [HBASE-17416](https://issues.apache.org/jira/browse/HBASE-17416) | Use isEmpty instead of size() == 0 in hbase-protocol-shaded | Minor | . |
| [HBASE-14061](https://issues.apache.org/jira/browse/HBASE-14061) | Support CF-level Storage Policy | Major | HFile, regionserver |
| [HBASE-17337](https://issues.apache.org/jira/browse/HBASE-17337) | list replication peers request should be routed through master | Major | . |
| [HBASE-12148](https://issues.apache.org/jira/browse/HBASE-12148) | Remove TimeRangeTracker as point of contention when many threads writing a Store | Major | Performance |
| [HBASE-15172](https://issues.apache.org/jira/browse/HBASE-15172) | Support setting storage policy in bulkload | Major | . |
| [HBASE-17388](https://issues.apache.org/jira/browse/HBASE-17388) | Move ReplicationPeer and other replication related PB messages to the replication.proto | Major | Replication |
| [HBASE-17409](https://issues.apache.org/jira/browse/HBASE-17409) | Re-fix XSS request issue in JMXJsonServlet | Major | security, UI |
| [HBASE-17410](https://issues.apache.org/jira/browse/HBASE-17410) | Use isEmpty instead of size() == 0 in hbase-client | Minor | Client |
| [HBASE-17373](https://issues.apache.org/jira/browse/HBASE-17373) | Reverse the order of snapshot creation in the CompactingMemStore | Major | . |
| [HBASE-17336](https://issues.apache.org/jira/browse/HBASE-17336) | get/update replication peer config requests should be routed through master | Major | . |
| [HBASE-17149](https://issues.apache.org/jira/browse/HBASE-17149) | Procedure V2 - Fix nonce submission to avoid unnecessary calling coprocessor multiple times | Major | proc-v2 |
| [HBASE-17320](https://issues.apache.org/jira/browse/HBASE-17320) | Add inclusive/exclusive support for startRow and endRow of scan | Major | Client, scan |
| [HBASE-17090](https://issues.apache.org/jira/browse/HBASE-17090) | Procedure v2 - fast wake if nothing else is running | Major | proc-v2 |
| [HBASE-17068](https://issues.apache.org/jira/browse/HBASE-17068) | Procedure v2 - inherit region locks | Major | master, proc-v2 |
| [HBASE-16524](https://issues.apache.org/jira/browse/HBASE-16524) | Procedure v2 - Compute WALs cleanup on wal modification and not on every sync | Minor | proc-v2 |
| [HBASE-17345](https://issues.apache.org/jira/browse/HBASE-17345) | Implement batch | Major | asyncclient, Client |
| [HBASE-17335](https://issues.apache.org/jira/browse/HBASE-17335) | enable/disable replication peer requests should be routed through master | Major | . |
| [HBASE-17334](https://issues.apache.org/jira/browse/HBASE-17334) | Add locate row before/after support for AsyncRegionLocator | Major | Client |
| [HBASE-17262](https://issues.apache.org/jira/browse/HBASE-17262) | Refactor RpcServer so as to make it extendable and/or pluggable | Major | rpc |
| [HBASE-11392](https://issues.apache.org/jira/browse/HBASE-11392) | add/remove peer requests should be routed through master | Critical | . |
| [HBASE-17107](https://issues.apache.org/jira/browse/HBASE-17107) | FN info should be cleaned up on region/table cleanup | Major | FavoredNodes |
| [HBASE-17142](https://issues.apache.org/jira/browse/HBASE-17142) | Implement multi get | Major | asyncclient, Client |
| [HBASE-17282](https://issues.apache.org/jira/browse/HBASE-17282) | Reduce the redundant requests to meta table | Major | Client |
| [HBASE-17148](https://issues.apache.org/jira/browse/HBASE-17148) | Procedure v2 - add bulk proc submit | Minor | master, proc-v2 |
| [HBASE-16398](https://issues.apache.org/jira/browse/HBASE-16398) | optimize HRegion computeHDFSBlocksDistribution | Major | regionserver |
| [HBASE-15787](https://issues.apache.org/jira/browse/HBASE-15787) | Change the flush related heuristics to work with offheap size configured | Major | regionserver |
| [HBASE-17000](https://issues.apache.org/jira/browse/HBASE-17000) | [RegionServer] Compute region filesystem space use and report to Master | Major | regionserver |
| [HBASE-17316](https://issues.apache.org/jira/browse/HBASE-17316) | Addendum to HBASE-17294, 'External Configuration for Memory Compaction' | Major | . |
| [HBASE-17313](https://issues.apache.org/jira/browse/HBASE-17313) | Add BufferedMutatorParams#clone method | Major | Client |
| [HBASE-17277](https://issues.apache.org/jira/browse/HBASE-17277) | Allow alternate BufferedMutator implementation | Major | . |
| [HBASE-17294](https://issues.apache.org/jira/browse/HBASE-17294) | External Configuration for Memory Compaction | Major | . |
| [HBASE-16336](https://issues.apache.org/jira/browse/HBASE-16336) | Removing peers seems to be leaving spare queues | Major | Replication |
| [HBASE-17251](https://issues.apache.org/jira/browse/HBASE-17251) | Add a timeout parameter when locating region | Major | asyncclient, Client |
| [HBASE-16941](https://issues.apache.org/jira/browse/HBASE-16941) | FavoredNodes - Split/Merge code paths | Major | FavoredNodes |
| [HBASE-17260](https://issues.apache.org/jira/browse/HBASE-17260) | Procedure v2 - Add setOwner() overload taking a User instance | Trivial | proc-v2 |
| [HBASE-16996](https://issues.apache.org/jira/browse/HBASE-16996) | Implement storage/retrieval of filesystem-use quotas into quota table | Major | . |
| [HBASE-17111](https://issues.apache.org/jira/browse/HBASE-17111) | Use Apache CLI in SnapshotInfo tool | Major | . |
| [HBASE-16648](https://issues.apache.org/jira/browse/HBASE-16648) | [JDK8] Use computeIfAbsent instead of get and putIfAbsent | Major | Performance |
| [HBASE-17167](https://issues.apache.org/jira/browse/HBASE-17167) | Pass mvcc to client when scan | Major | Client, scan |
| [HBASE-17012](https://issues.apache.org/jira/browse/HBASE-17012) | Handle Offheap cells in CompressedKvEncoder | Major | regionserver |
| [HBASE-17048](https://issues.apache.org/jira/browse/HBASE-17048) | Calcuate suitable ByteBuf size when allocating send buffer in FanOutOneBlockAsyncDFSOutput | Major | wal |
| [HBASE-17183](https://issues.apache.org/jira/browse/HBASE-17183) | Handle ByteBufferCell while making TagRewriteCell | Major | regionserver |
| [HBASE-17162](https://issues.apache.org/jira/browse/HBASE-17162) | Avoid unconditional call to getXXXArray() in write path | Major | regionserver |
| [HBASE-17169](https://issues.apache.org/jira/browse/HBASE-17169) | Remove Cell variants with ShareableMemory | Major | regionserver |
| [HBASE-16984](https://issues.apache.org/jira/browse/HBASE-16984) | Implement getScanner | Major | Client |
| [HBASE-15786](https://issues.apache.org/jira/browse/HBASE-15786) | Create DBB backed MSLAB pool | Major | regionserver |
| [HBASE-17141](https://issues.apache.org/jira/browse/HBASE-17141) | Introduce a more user-friendly implementation of AsyncTable | Major | asyncclient, Client |
| [HBASE-16995](https://issues.apache.org/jira/browse/HBASE-16995) | Build client Java API and client protobuf messages | Major | Client |
| [HBASE-17139](https://issues.apache.org/jira/browse/HBASE-17139) | Remove sweep tool related configs from hbase-default.xml | Major | . |
| [HBASE-16956](https://issues.apache.org/jira/browse/HBASE-16956) | Refactor FavoredNodePlan to use regionNames as keys | Minor | FavoredNodes |
| [HBASE-17085](https://issues.apache.org/jira/browse/HBASE-17085) | AsyncFSWAL may issue unnecessary AsyncDFSOutput.sync | Major | wal |
| [HBASE-16169](https://issues.apache.org/jira/browse/HBASE-16169) | Make RegionSizeCalculator scalable | Major | mapreduce, scaling |
| [HBASE-17073](https://issues.apache.org/jira/browse/HBASE-17073) | Increase the max number of buffers in ByteBufferPool | Major | . |
| [HBASE-17087](https://issues.apache.org/jira/browse/HBASE-17087) | Enable Aliasing for CodedInputStream created by ByteInputByteString#newCodedInput | Major | regionserver |
| [HBASE-17089](https://issues.apache.org/jira/browse/HBASE-17089) | Add doc on experience running with hedged reads | Major | documentation |
| [HBASE-15788](https://issues.apache.org/jira/browse/HBASE-15788) | Use Offheap ByteBuffers from BufferPool to read RPC requests. | Major | regionserver |
| [HBASE-16838](https://issues.apache.org/jira/browse/HBASE-16838) | Implement basic scan | Major | asyncclient, Client |
| [HBASE-17071](https://issues.apache.org/jira/browse/HBASE-17071) | Do not initialize MemstoreChunkPool when use mslab option is turned off | Major | . |
| [HBASE-16570](https://issues.apache.org/jira/browse/HBASE-16570) | Compute region locality in parallel at startup | Major | . |
| [HBASE-17053](https://issues.apache.org/jira/browse/HBASE-17053) | Remove LogRollerExitedChecker | Major | wal |
| [HBASE-17035](https://issues.apache.org/jira/browse/HBASE-17035) | Check why we roll a wal writer at 10MB when the configured roll size is 120M+ with AsyncFSWAL | Major | wal |
| [HBASE-17021](https://issues.apache.org/jira/browse/HBASE-17021) | Use RingBuffer to reduce the contention in AsyncFSWAL | Major | wal |
| [HBASE-16982](https://issues.apache.org/jira/browse/HBASE-16982) | Better integrate Apache CLI in AbstractHBaseTool | Major | . |
| [HBASE-17050](https://issues.apache.org/jira/browse/HBASE-17050) | Upgrade Apache CLI version from 1.2 to 1.3.1 | Minor | . |
| [HBASE-17030](https://issues.apache.org/jira/browse/HBASE-17030) | Procedure v2 - A couple of tweaks to the SplitTableRegionProcedure | Trivial | proc-v2 |
| [HBASE-16937](https://issues.apache.org/jira/browse/HBASE-16937) | Replace SnapshotType protobuf conversion when we can directly use the pojo object | Trivial | snapshots |
| [HBASE-16892](https://issues.apache.org/jira/browse/HBASE-16892) | Use TableName instead of String in SnapshotDescription | Trivial | snapshots |
| [HBASE-16865](https://issues.apache.org/jira/browse/HBASE-16865) | Procedure v2 - Inherit lock from root proc | Major | proc-v2 |
| [HBASE-16970](https://issues.apache.org/jira/browse/HBASE-16970) | Clarify misleading Scan.java comment about caching | Trivial | . |
| [HBASE-16986](https://issues.apache.org/jira/browse/HBASE-16986) | Add note on how scanner caching has changed since 0.98 to refguid | Minor | documentation |
| [HBASE-16608](https://issues.apache.org/jira/browse/HBASE-16608) | Introducing the ability to merge ImmutableSegments without copy-compaction or SQM usage | Major | . |
| [HBASE-16945](https://issues.apache.org/jira/browse/HBASE-16945) | Implement AsyncRegionLocator | Major | Client |
| [HBASE-16968](https://issues.apache.org/jira/browse/HBASE-16968) | Refactor FanOutOneBlockAsyncDFSOutput | Major | io, wal |
| [HBASE-16954](https://issues.apache.org/jira/browse/HBASE-16954) | Unify HTable#checkAndDelete with AP | Minor | . |
| [HBASE-16891](https://issues.apache.org/jira/browse/HBASE-16891) | Try copying to the Netty ByteBuf directly from the WALEdit | Major | wal |
| [HBASE-16932](https://issues.apache.org/jira/browse/HBASE-16932) | Implement small scan | Major | Client |
| [HBASE-16835](https://issues.apache.org/jira/browse/HBASE-16835) | Revisit the zookeeper usage at client side | Major | Client, Zookeeper |
| [HBASE-15709](https://issues.apache.org/jira/browse/HBASE-15709) | Handle large edits for asynchronous WAL | Critical | io, wal |
| [HBASE-15789](https://issues.apache.org/jira/browse/HBASE-15789) | PB related changes to work with offheap | Major | regionserver |
| [HBASE-16871](https://issues.apache.org/jira/browse/HBASE-16871) | Procedure v2 - add waiting procs back to the queue after restart | Major | proc-v2 |
| [HBASE-16872](https://issues.apache.org/jira/browse/HBASE-16872) | Implement mutateRow and checkAndMutate | Major | Client |
| [HBASE-16874](https://issues.apache.org/jira/browse/HBASE-16874) | Fix TestMasterFailoverWithProcedures and ensure single proc-executor for kill/restart tests | Minor | proc-v2 |
| [HBASE-16864](https://issues.apache.org/jira/browse/HBASE-16864) | Procedure v2 - Fix StateMachineProcedure support for child procs at last step | Major | proc-v2 |
| [HBASE-16837](https://issues.apache.org/jira/browse/HBASE-16837) | Implement checkAndPut and checkAndDelete | Major | Client |
| [HBASE-16836](https://issues.apache.org/jira/browse/HBASE-16836) | Implement increment and append | Major | Client |
| [HBASE-16846](https://issues.apache.org/jira/browse/HBASE-16846) | Procedure v2 - executor cleanup | Minor | proc-v2 |
| [HBASE-16834](https://issues.apache.org/jira/browse/HBASE-16834) | Add AsyncConnection support for ConnectionFactory | Major | Client |
| [HBASE-16839](https://issues.apache.org/jira/browse/HBASE-16839) | Procedure v2 - Move all protobuf handling to ProcedureUtil | Minor | proc-v2 |
| [HBASE-16642](https://issues.apache.org/jira/browse/HBASE-16642) | Procedure V2: Use DelayQueue instead of TimeoutBlockingQueue | Minor | proc-v2 |
| [HBASE-16813](https://issues.apache.org/jira/browse/HBASE-16813) | Procedure v2 - Move ProcedureEvent to hbase-procedure module | Major | proc-v2 |
| [HBASE-16735](https://issues.apache.org/jira/browse/HBASE-16735) | Procedure v2 - Fix yield while holding locks | Major | proc-v2 |
| [HBASE-16505](https://issues.apache.org/jira/browse/HBASE-16505) | Save deadline in RpcCallContext according to request's timeout | Major | . |
| [HBASE-15561](https://issues.apache.org/jira/browse/HBASE-15561) | See how G1GC works with MSLAB and chunk pool | Major | . |
| [HBASE-16802](https://issues.apache.org/jira/browse/HBASE-16802) | Procedure v2 - group procedure cleaning | Trivial | proc-v2 |
| [HBASE-16146](https://issues.apache.org/jira/browse/HBASE-16146) | Counters are expensive... | Major | metrics |
| [HBASE-16788](https://issues.apache.org/jira/browse/HBASE-16788) | Race in compacted file deletion between HStore close() and closeAndArchiveCompactedFiles() | Blocker | regionserver |
| [HBASE-14734](https://issues.apache.org/jira/browse/HBASE-14734) | BindException when setting up MiniKdc | Major | flakey, test |
| [HBASE-15984](https://issues.apache.org/jira/browse/HBASE-15984) | Given failure to parse a given WAL that was closed cleanly, replay the WAL. | Critical | Replication |
| [HBASE-15721](https://issues.apache.org/jira/browse/HBASE-15721) | Optimization in cloning cells into MSLAB | Major | regionserver |
| [HBASE-16372](https://issues.apache.org/jira/browse/HBASE-16372) | References to previous cell in read path should be avoided | Blocker | Scanners |
| [HBASE-16759](https://issues.apache.org/jira/browse/HBASE-16759) | Avoid ByteString.copyFrom usage wherever possible | Major | Protobufs |
| [HBASE-16758](https://issues.apache.org/jira/browse/HBASE-16758) | Bring back HBaseZeroCopyByteStringer stuff | Major | Protobufs |
| [HBASE-16760](https://issues.apache.org/jira/browse/HBASE-16760) | Deprecate ByteString related methods in Bytes.java | Major | Protobufs |
| [HBASE-16741](https://issues.apache.org/jira/browse/HBASE-16741) | Amend the generate protobufs out-of-band build step to include shade, pulling in protobuf source and a hook for patching protobuf | Major | Protobufs |
| [HBASE-16264](https://issues.apache.org/jira/browse/HBASE-16264) | Figure how to deal with endpoints and shaded pb | Critical | Coprocessors, Protobufs |
| [HBASE-16742](https://issues.apache.org/jira/browse/HBASE-16742) | Add chapter for devs on how we do protobufs going forward | Major | documentation |
| [HBASE-16738](https://issues.apache.org/jira/browse/HBASE-16738) | L1 cache caching shared memory HFile block when blocks promoted from L2 to L1 | Major | regionserver, Scanners |
| [HBASE-16134](https://issues.apache.org/jira/browse/HBASE-16134) | Introduce Cell extension for server side. | Major | regionserver |
| [HBASE-16695](https://issues.apache.org/jira/browse/HBASE-16695) | Procedure v2 - Support for parent holding locks | Major | proc-v2 |
| [HBASE-16587](https://issues.apache.org/jira/browse/HBASE-16587) | Procedure v2 - Cleanup suspended proc execution | Major | proc-v2 |
| [HBASE-16651](https://issues.apache.org/jira/browse/HBASE-16651) | LRUBlockCache#returnBlock should try return block to Victim Handler L2 cache. | Major | regionserver, Scanners |
| [HBASE-16554](https://issues.apache.org/jira/browse/HBASE-16554) | Procedure V2 - Recover 'updated' part of WAL tracker if trailer is corrupted. | Major | . |
| [HBASE-7612](https://issues.apache.org/jira/browse/HBASE-7612) | [JDK8] Replace use of high-scale-lib counters with intrinsic facilities | Trivial | metrics |
| [HBASE-16534](https://issues.apache.org/jira/browse/HBASE-16534) | Procedure v2 - Perf Tool for Scheduler | Major | proc-v2, tooling |
| [HBASE-16586](https://issues.apache.org/jira/browse/HBASE-16586) | Procedure v2 - Cleanup sched wait/lock semantic | Major | proc-v2 |
| [HBASE-16626](https://issues.apache.org/jira/browse/HBASE-16626) | User customized RegionScanner from 1.X is incompatible with 2.0.0's off-heap part | Major | Offheaping |
| [HBASE-16618](https://issues.apache.org/jira/browse/HBASE-16618) | Procedure v2 - Add base class for table and ns procedures | Minor | master, proc-v2 |
| [HBASE-16229](https://issues.apache.org/jira/browse/HBASE-16229) | Cleaning up size and heapSize calculation | Major | . |
| [HBASE-16592](https://issues.apache.org/jira/browse/HBASE-16592) | Unify Delete request with AP | Major | . |
| [HBASE-16596](https://issues.apache.org/jira/browse/HBASE-16596) | Reduce redundant interfaces in AsyncProcess | Major | . |
| [HBASE-16530](https://issues.apache.org/jira/browse/HBASE-16530) | Reduce DBE code duplication | Major | Performance |
| [HBASE-16445](https://issues.apache.org/jira/browse/HBASE-16445) | Refactor and reimplement RpcClient | Major | IPC/RPC, rpc |
| [HBASE-16516](https://issues.apache.org/jira/browse/HBASE-16516) | Revisit the implementation of PayloadCarryingRpcController | Major | rpc |
| [HBASE-16101](https://issues.apache.org/jira/browse/HBASE-16101) | Procedure v2 - Perf Tool for WAL | Major | proc-v2, tooling |
| [HBASE-16311](https://issues.apache.org/jira/browse/HBASE-16311) | Audit log for delete snapshot operation is missing in case of snapshot owner deleting the same | Minor | snapshots |
| [HBASE-16519](https://issues.apache.org/jira/browse/HBASE-16519) | Procedure v2 - Avoid sync wait on DDLs operation | Major | master, proc-v2 |
| [HBASE-16507](https://issues.apache.org/jira/browse/HBASE-16507) | Procedure v2 - Force DDL operation to always roll forward | Minor | master, proc-v2 |
| [HBASE-16526](https://issues.apache.org/jira/browse/HBASE-16526) | Add more ipc tests | Major | rpc, test |
| [HBASE-16532](https://issues.apache.org/jira/browse/HBASE-16532) | Procedure-V2: Enforce procedure ownership at submission | Major | proc-v2 |
| [HBASE-16531](https://issues.apache.org/jira/browse/HBASE-16531) | Move cell block related code out of IPCUtil | Major | rpc |
| [HBASE-16533](https://issues.apache.org/jira/browse/HBASE-16533) | Procedure v2 - Extract chore from the executor | Minor | proc-v2 |
| [HBASE-16522](https://issues.apache.org/jira/browse/HBASE-16522) | Procedure v2 - Cache system user and avoid IOException | Major | master, proc-v2 |
| [HBASE-16082](https://issues.apache.org/jira/browse/HBASE-16082) | Procedure v2 - Move out helpers from MasterProcedureScheduler | Trivial | proc-v2 |
| [HBASE-16510](https://issues.apache.org/jira/browse/HBASE-16510) | Reset RpcController before retry | Major | rpc |
| [HBASE-16407](https://issues.apache.org/jira/browse/HBASE-16407) | Handle MemstoreChunkPool size when HeapMemoryManager tunes memory | Major | . |
| [HBASE-16433](https://issues.apache.org/jira/browse/HBASE-16433) | Remove AsyncRpcChannel related stuffs | Major | rpc |
| [HBASE-16474](https://issues.apache.org/jira/browse/HBASE-16474) | Remove dfs.support.append related code and documentation | Major | fs, regionserver, wal |
| [HBASE-16451](https://issues.apache.org/jira/browse/HBASE-16451) | Procedure v2 - Test WAL protobuf entry size limit | Minor | proc-v2 |
| [HBASE-14921](https://issues.apache.org/jira/browse/HBASE-14921) | Inmemory Compaction Optimizations; Segment Structure | Major | . |
| [HBASE-16485](https://issues.apache.org/jira/browse/HBASE-16485) | Procedure V2 - Add support to addChildProcedure() as last "step" in StateMachineProcedure | Minor | proc-v2 |
| [HBASE-16440](https://issues.apache.org/jira/browse/HBASE-16440) | MemstoreChunkPool might cross its maxCount of chunks to pool | Major | . |
| [HBASE-16318](https://issues.apache.org/jira/browse/HBASE-16318) | fail build if license isn't in whitelist | Major | build, dependencies |
| [HBASE-16452](https://issues.apache.org/jira/browse/HBASE-16452) | Procedure v2 - Make ProcedureWALPrettyPrinter extend Tool | Minor | proc-v2 |
| [HBASE-16405](https://issues.apache.org/jira/browse/HBASE-16405) | Change read path Bloom check to work with Cells with out any copy | Major | Compaction |
| [HBASE-16094](https://issues.apache.org/jira/browse/HBASE-16094) | Procedure v2 - Improve cleaning up of proc wals | Major | proc-v2 |
| [HBASE-16378](https://issues.apache.org/jira/browse/HBASE-16378) | Procedure v2 - Make ProcedureException extend HBaseException | Trivial | proc-v2 |
| [HBASE-16404](https://issues.apache.org/jira/browse/HBASE-16404) | Make DeleteBloomFilters work with BloomContext | Minor | Compaction |
| [HBASE-15554](https://issues.apache.org/jira/browse/HBASE-15554) | StoreFile$Writer.appendGeneralBloomFilter generates extra KV | Major | Performance |
| [HBASE-16308](https://issues.apache.org/jira/browse/HBASE-16308) | Contain protobuf references | Major | Protobufs |
| [HBASE-16285](https://issues.apache.org/jira/browse/HBASE-16285) | Drop RPC requests if it must be considered as timeout at client | Major | . |
| [HBASE-16263](https://issues.apache.org/jira/browse/HBASE-16263) | Move all to do w/ protobuf -- \*.proto files and generated classes -- under hbase-protocol | Major | Protobufs |
| [HBASE-16317](https://issues.apache.org/jira/browse/HBASE-16317) | revert all ESAPI changes | Blocker | dependencies, security |
| [HBASE-16286](https://issues.apache.org/jira/browse/HBASE-16286) | When TagRewriteCell are not copied to MSLAB, deep clone it while adding to Memstore | Major | regionserver |
| [HBASE-16280](https://issues.apache.org/jira/browse/HBASE-16280) | Use hash based map in SequenceIdAccounting | Major | wal |
| [HBASE-16205](https://issues.apache.org/jira/browse/HBASE-16205) | When Cells are not copied to MSLAB, deep clone it while adding to Memstore | Critical | regionserver |
| [HBASE-14552](https://issues.apache.org/jira/browse/HBASE-14552) | Procedure V2: Reimplement DispatchMergingRegionHandler | Major | proc-v2 |
| [HBASE-16236](https://issues.apache.org/jira/browse/HBASE-16236) | Typo in javadoc of InstancePending | Trivial | Zookeeper |
| [HBASE-16233](https://issues.apache.org/jira/browse/HBASE-16233) | Procedure V2: Support acquire/release shared table lock concurrently | Major | proc-v2 |
| [HBASE-16219](https://issues.apache.org/jira/browse/HBASE-16219) | Move meta bootstrap out of HMaster | Trivial | master, Region Assignment |
| [HBASE-15305](https://issues.apache.org/jira/browse/HBASE-15305) | Fix a couple of incorrect anchors in HBase ref guide | Major | documentation |
| [HBASE-16195](https://issues.apache.org/jira/browse/HBASE-16195) | Should not add chunk into chunkQueue if not using chunk pool in HeapMemStoreLAB | Major | . |
| [HBASE-16208](https://issues.apache.org/jira/browse/HBASE-16208) | Make TableBasedReplicationQueuesImpl check that queue exists before attempting to remove it | Major | Replication |
| [HBASE-16214](https://issues.apache.org/jira/browse/HBASE-16214) | Add in UI description of Replication Table | Minor | Replication |
| [HBASE-16092](https://issues.apache.org/jira/browse/HBASE-16092) | Procedure v2 - complete child procedure support | Minor | proc-v2 |
| [HBASE-16194](https://issues.apache.org/jira/browse/HBASE-16194) | Should count in MSLAB chunk allocation into heap size change when adding duplicate cells | Major | regionserver |
| [HBASE-16176](https://issues.apache.org/jira/browse/HBASE-16176) | Bug fixes/improvements on HBASE-15650 Remove TimeRangeTracker as point of contention when many threads reading a StoreFile | Major | Performance |
| [HBASE-15935](https://issues.apache.org/jira/browse/HBASE-15935) | Have a separate Walker task running concurrently with Generator | Minor | integration tests |
| [HBASE-16162](https://issues.apache.org/jira/browse/HBASE-16162) | Compacting Memstore : unnecessary push of active segments to pipeline | Critical | . |
| [HBASE-15985](https://issues.apache.org/jira/browse/HBASE-15985) | clarify promises about edits from replication in ref guide | Major | documentation, Replication |
| [HBASE-16163](https://issues.apache.org/jira/browse/HBASE-16163) | Compacting Memstore : CompactionPipeline#addFirst can use LinkedList#addFirst | Minor | . |
| [HBASE-16164](https://issues.apache.org/jira/browse/HBASE-16164) | Missing close of new compacted segments in few occasions which might leak MSLAB chunks from pool | Critical | . |
| [HBASE-16155](https://issues.apache.org/jira/browse/HBASE-16155) | Compacting Memstore : Few log improvements | Minor | . |
| [HBASE-16153](https://issues.apache.org/jira/browse/HBASE-16153) | Correct the config name 'hbase.memestore.inmemoryflush.threshold.factor' | Trivial | . |
| [HBASE-16143](https://issues.apache.org/jira/browse/HBASE-16143) | Change MemstoreScanner constructor to accept List\<KeyValueScanner\> | Minor | . |
| [HBASE-16121](https://issues.apache.org/jira/browse/HBASE-16121) | Require only MasterServices to the ServerManager constructor | Trivial | master |
| [HBASE-16068](https://issues.apache.org/jira/browse/HBASE-16068) | Procedure v2 - use consts for conf properties in tests | Trivial | proc-v2, test |
| [HBASE-16083](https://issues.apache.org/jira/browse/HBASE-16083) | Fix table based replication related configs | Trivial | Replication |
| [HBASE-16080](https://issues.apache.org/jira/browse/HBASE-16080) | Fix flakey tests | Critical | Replication |
| [HBASE-16036](https://issues.apache.org/jira/browse/HBASE-16036) | Fix ReplicationTableBase initialization to make it non-blocking | Major | Replication |
| [HBASE-14878](https://issues.apache.org/jira/browse/HBASE-14878) | maven archetype: client application with shaded jars | Major | build, Usability |
| [HBASE-14877](https://issues.apache.org/jira/browse/HBASE-14877) | maven archetype: client application | Major | build, Usability |
| [HBASE-16056](https://issues.apache.org/jira/browse/HBASE-16056) | Procedure v2 - fix master crash for FileNotFound | Minor | proc-v2 |
| [HBASE-16038](https://issues.apache.org/jira/browse/HBASE-16038) | Ignore JVM crashes or machine shutdown failures in report-flakies | Major | . |
| [HBASE-15999](https://issues.apache.org/jira/browse/HBASE-15999) | NPE in MemstoreCompactor | Critical | . |
| [HBASE-16034](https://issues.apache.org/jira/browse/HBASE-16034) | Fix ProcedureTestingUtility#LoadCounter.setMaxProcId() | Minor | proc-v2, test |
| [HBASE-15974](https://issues.apache.org/jira/browse/HBASE-15974) | Create a ReplicationQueuesClientHBaseImpl | Major | Replication |
| [HBASE-16023](https://issues.apache.org/jira/browse/HBASE-16023) | Fastpath for the FIFO rpcscheduler | Major | Performance, rpc |
| [HBASE-15525](https://issues.apache.org/jira/browse/HBASE-15525) | OutOfMemory could occur when using BoundedByteBufferPool during RPC bursts | Critical | IPC/RPC |
| [HBASE-15991](https://issues.apache.org/jira/browse/HBASE-15991) | CompactingMemstore#InMemoryFlushRunnable should implement Comparable/Comparator | Critical | . |
| [HBASE-15272](https://issues.apache.org/jira/browse/HBASE-15272) | Add error handling for split and compact actions in table.jsp | Major | UI |
| [HBASE-15994](https://issues.apache.org/jira/browse/HBASE-15994) | Allow selection of RpcSchedulers | Major | . |
| [HBASE-15107](https://issues.apache.org/jira/browse/HBASE-15107) | Procedure V2 - Procedure Queue with Regions | Major | proc-v2 |
| [HBASE-15948](https://issues.apache.org/jira/browse/HBASE-15948) | Port "HADOOP-9956 RPC listener inefficiently assigns connections to readers" | Major | IPC/RPC |
| [HBASE-15174](https://issues.apache.org/jira/browse/HBASE-15174) | Client Public API should not have PB objects in 2.0 | Blocker | . |
| [HBASE-15883](https://issues.apache.org/jira/browse/HBASE-15883) | Adding WAL files and tracking offsets in HBase. | Major | Replication |
| [HBASE-15927](https://issues.apache.org/jira/browse/HBASE-15927) | Remove HMaster.assignRegion() | Trivial | test |
| [HBASE-15917](https://issues.apache.org/jira/browse/HBASE-15917) | Flaky tests dashboard | Major | . |
| [HBASE-15919](https://issues.apache.org/jira/browse/HBASE-15919) | Document @Rule vs @ClassRule. Also clarify timeout limits are on TestCase. | Minor | . |
| [HBASE-15915](https://issues.apache.org/jira/browse/HBASE-15915) | Set timeouts on hanging tests | Major | . |
| [HBASE-15896](https://issues.apache.org/jira/browse/HBASE-15896) | Add timeout tests to flaky list from report-flakies.py | Major | test |
| [HBASE-14920](https://issues.apache.org/jira/browse/HBASE-14920) | Compacting Memstore | Major | . |
| [HBASE-15872](https://issues.apache.org/jira/browse/HBASE-15872) | Split TestWALProcedureStore | Trivial | proc-v2, test |
| [HBASE-15865](https://issues.apache.org/jira/browse/HBASE-15865) | Move TestTableDeleteFamilyHandler and TestTableDescriptorModification handler tests to procedure | Trivial | test |
| [HBASE-15651](https://issues.apache.org/jira/browse/HBASE-15651) | Add report-flakies.py to use jenkins api to get failing tests | Major | . |
| [HBASE-15825](https://issues.apache.org/jira/browse/HBASE-15825) | Fix the null pointer in DynamicLogicExpressionSuite | Major | . |
| [HBASE-15813](https://issues.apache.org/jira/browse/HBASE-15813) | Rename DefaultWALProvider to a more specific name and clean up unnecessary reference to it | Major | wal |
| [HBASE-15785](https://issues.apache.org/jira/browse/HBASE-15785) | Unnecessary lock in ByteBufferArray | Major | regionserver, Scanners |
| [HBASE-15740](https://issues.apache.org/jira/browse/HBASE-15740) | Replication source.shippedKBs metric is undercounting because it is in KB | Major | . |
| [HBASE-15776](https://issues.apache.org/jira/browse/HBASE-15776) | Replace master.am.getTableStateManager() with the direct master.getTableStateManager() | Trivial | master |
| [HBASE-15778](https://issues.apache.org/jira/browse/HBASE-15778) | replace master.am and master.sm direct access with getter calls | Trivial | master |
| [HBASE-15743](https://issues.apache.org/jira/browse/HBASE-15743) | Add Transparent Data Encryption support for FanOutOneBlockAsyncDFSOutput | Major | wal |
| [HBASE-15763](https://issues.apache.org/jira/browse/HBASE-15763) | Isolate Wal related stuff from MasterFileSystem | Trivial | master, wal |
| [HBASE-15754](https://issues.apache.org/jira/browse/HBASE-15754) | Add testcase for AES encryption | Major | wal |
| [HBASE-15337](https://issues.apache.org/jira/browse/HBASE-15337) | Document date tiered compaction in the book | Major | documentation |
| [HBASE-15675](https://issues.apache.org/jira/browse/HBASE-15675) | Add more details about region on table.jsp | Major | . |
| [HBASE-15658](https://issues.apache.org/jira/browse/HBASE-15658) | RegionServerCallable / RpcRetryingCaller clear meta cache on retries | Critical | Client |
| [HBASE-15735](https://issues.apache.org/jira/browse/HBASE-15735) | Tightening of the CP contract | Major | regionserver, Scanners |
| [HBASE-15477](https://issues.apache.org/jira/browse/HBASE-15477) | Do not save 'next block header' when we cache hfileblocks | Major | BlockCache, Performance |
| [HBASE-15689](https://issues.apache.org/jira/browse/HBASE-15689) | Changes to hbase-personality.sh to include/exclude flaky tests | Major | . |
| [HBASE-15628](https://issues.apache.org/jira/browse/HBASE-15628) | Implement an AsyncOutputStream which can work with any FileSystem implementation | Major | . |
| [HBASE-15579](https://issues.apache.org/jira/browse/HBASE-15579) | Procedure V2 - Remove synchronized around nonce in Procedure submit | Trivial | proc-v2 |
| [HBASE-15392](https://issues.apache.org/jira/browse/HBASE-15392) | Single Cell Get reads two HFileBlocks | Major | BucketCache |
| [HBASE-15671](https://issues.apache.org/jira/browse/HBASE-15671) | Add per-table metrics on memstore, storefile and regionsize | Major | . |
| [HBASE-15366](https://issues.apache.org/jira/browse/HBASE-15366) | Add doc, trace-level logging, and test around hfileblock | Major | BlockCache |
| [HBASE-15683](https://issues.apache.org/jira/browse/HBASE-15683) | Min latency in latency histograms are emitted as Long.MAX\_VALUE | Major | . |
| [HBASE-15368](https://issues.apache.org/jira/browse/HBASE-15368) | Add pluggable window support | Major | Compaction |
| [HBASE-15663](https://issues.apache.org/jira/browse/HBASE-15663) | Hook up JvmPauseMonitor to ThriftServer | Major | metrics, Thrift |
| [HBASE-15662](https://issues.apache.org/jira/browse/HBASE-15662) | Hook up JvmPauseMonitor to REST server | Major | metrics, REST |
| [HBASE-15518](https://issues.apache.org/jira/browse/HBASE-15518) | Add Per-Table metrics back | Major | . |
| [HBASE-15640](https://issues.apache.org/jira/browse/HBASE-15640) | L1 cache doesn't give fair warning that it is showing partial stats only when it hits limit | Major | BlockCache |
| [HBASE-15386](https://issues.apache.org/jira/browse/HBASE-15386) | PREFETCH\_BLOCKS\_ON\_OPEN in HColumnDescriptor is ignored | Major | BucketCache |
| [HBASE-15665](https://issues.apache.org/jira/browse/HBASE-15665) | Support using different StoreFileComparators for different CompactionPolicies | Major | Compaction |
| [HBASE-15527](https://issues.apache.org/jira/browse/HBASE-15527) | Refactor Compactor related classes | Major | Compaction |
| [HBASE-15407](https://issues.apache.org/jira/browse/HBASE-15407) | Add SASL support for fan out OutputStream | Major | util, wal |
| [HBASE-15380](https://issues.apache.org/jira/browse/HBASE-15380) | Purge rollback support in Store etc. | Major | . |
| [HBASE-15537](https://issues.apache.org/jira/browse/HBASE-15537) | Make multi WAL work with WALs other than FSHLog | Major | . |
| [HBASE-15400](https://issues.apache.org/jira/browse/HBASE-15400) | Use DateTieredCompactor for Date Tiered Compaction | Major | Compaction |
| [HBASE-15369](https://issues.apache.org/jira/browse/HBASE-15369) | Handle NPE in region.jsp | Minor | UI |
| [HBASE-15505](https://issues.apache.org/jira/browse/HBASE-15505) | ReplicationPeerConfig should be builder-style | Major | . |
| [HBASE-15293](https://issues.apache.org/jira/browse/HBASE-15293) | Handle TableNotFound and IllegalArgument exceptions in table.jsp | Major | UI |
| [HBASE-15538](https://issues.apache.org/jira/browse/HBASE-15538) | Implement secure async protobuf wal writer | Major | wal |
| [HBASE-15389](https://issues.apache.org/jira/browse/HBASE-15389) | Write out multiple files when compaction | Major | Compaction |
| [HBASE-15384](https://issues.apache.org/jira/browse/HBASE-15384) | Avoid using '/tmp' directory in TestBulkLoad | Major | test |
| [HBASE-15524](https://issues.apache.org/jira/browse/HBASE-15524) | Fix NPE in client-side metrics | Critical | Client, metrics |
| [HBASE-15495](https://issues.apache.org/jira/browse/HBASE-15495) | Connection leak in FanOutOneBlockAsyncDFSOutputHelper | Major | . |
| [HBASE-15416](https://issues.apache.org/jira/browse/HBASE-15416) | TestHFileBackedByBucketCache is flakey since it went in | Critical | BucketCache |
| [HBASE-15412](https://issues.apache.org/jira/browse/HBASE-15412) | Add average region size metric | Major | . |
| [HBASE-15488](https://issues.apache.org/jira/browse/HBASE-15488) | Add ACL for setting split merge switch | Major | . |
| [HBASE-15464](https://issues.apache.org/jira/browse/HBASE-15464) | Flush / Compaction metrics revisited | Major | metrics |
| [HBASE-15460](https://issues.apache.org/jira/browse/HBASE-15460) | Fix infer issues in hbase-common | Major | . |
| [HBASE-15479](https://issues.apache.org/jira/browse/HBASE-15479) | No more garbage or beware of autoboxing | Major | Client |
| [HBASE-15334](https://issues.apache.org/jira/browse/HBASE-15334) | Add avro support for spark hbase connector | Major | . |
| [HBASE-15390](https://issues.apache.org/jira/browse/HBASE-15390) | Unnecessary MetaCache evictions cause elevated number of requests to meta | Blocker | Client |
| [HBASE-15180](https://issues.apache.org/jira/browse/HBASE-15180) | Reduce garbage created while reading Cells from Codec Decoder | Major | regionserver |
| [HBASE-15435](https://issues.apache.org/jira/browse/HBASE-15435) | Add WAL (in bytes) written metric | Major | . |
| [HBASE-15113](https://issues.apache.org/jira/browse/HBASE-15113) | Procedure v2 - Speedup eviction of sys operation results | Minor | proc-v2 |
| [HBASE-15422](https://issues.apache.org/jira/browse/HBASE-15422) | Procedure v2 - Avoid double yield | Major | proc-v2 |
| [HBASE-15421](https://issues.apache.org/jira/browse/HBASE-15421) | Convert TestStoreScanner to junit4 from junit3 and clean up close of scanners | Minor | test |
| [HBASE-15354](https://issues.apache.org/jira/browse/HBASE-15354) | Use same criteria for clearing meta cache for all operations | Major | Client |
| [HBASE-15373](https://issues.apache.org/jira/browse/HBASE-15373) | DEPRECATED\_NAME\_OF\_NO\_LIMIT\_THROUGHPUT\_CONTROLLER\_CLASS value is wrong in CompactionThroughputControllerFactory | Minor | Compaction |
| [HBASE-15375](https://issues.apache.org/jira/browse/HBASE-15375) | Do not write to '/tmp' in TestRegionMover | Major | test |
| [HBASE-15359](https://issues.apache.org/jira/browse/HBASE-15359) | Simplifying Segment hierarchy | Major | . |
| [HBASE-15371](https://issues.apache.org/jira/browse/HBASE-15371) | Procedure V2 - Completed support parent-child procedure | Major | proc-v2 |
| [HBASE-15365](https://issues.apache.org/jira/browse/HBASE-15365) | Do not write to '/tmp' in TestHBaseConfiguration | Major | test |
| [HBASE-15346](https://issues.apache.org/jira/browse/HBASE-15346) | add 1.3 RM to docs | Major | documentation |
| [HBASE-15351](https://issues.apache.org/jira/browse/HBASE-15351) | Fix description of hbase.bucketcache.size in hbase-default.xml | Major | documentation |
| [HBASE-15205](https://issues.apache.org/jira/browse/HBASE-15205) | Do not find the replication scope for every WAL#append() | Minor | regionserver |
| [HBASE-15311](https://issues.apache.org/jira/browse/HBASE-15311) | Prevent NPE in BlockCacheViewTmpl | Major | UI |
| [HBASE-15144](https://issues.apache.org/jira/browse/HBASE-15144) | Procedure v2 - Web UI displaying Store state | Minor | proc-v2, UI |
| [HBASE-15264](https://issues.apache.org/jira/browse/HBASE-15264) | Implement a fan out HDFS OutputStream | Major | util, wal |
| [HBASE-15016](https://issues.apache.org/jira/browse/HBASE-15016) | StoreServices facility in Region | Major | . |
| [HBASE-15232](https://issues.apache.org/jira/browse/HBASE-15232) | Exceptions returned over multi RPC don't automatically trigger region location reloads | Major | Client |
| [HBASE-14949](https://issues.apache.org/jira/browse/HBASE-14949) | Resolve name conflict when splitting if there are duplicated WAL entries | Major | wal |
| [HBASE-15270](https://issues.apache.org/jira/browse/HBASE-15270) | Use appropriate encoding for "filter" field in TaskMonitorTmpl.jamon | Major | UI |
| [HBASE-15263](https://issues.apache.org/jira/browse/HBASE-15263) | TestIPv6NIOServerSocketChannel.testServerSocketFromLocalhostResolution can hang indefinetly | Major | . |
| [HBASE-15244](https://issues.apache.org/jira/browse/HBASE-15244) | More doc around native lib setup and check and crc | Major | documentation, Performance |
| [HBASE-15203](https://issues.apache.org/jira/browse/HBASE-15203) | Reduce garbage created by path.toString() during Checksum verification | Minor | regionserver |
| [HBASE-14919](https://issues.apache.org/jira/browse/HBASE-14919) | Infrastructure refactoring for In-Memory Flush | Major | . |
| [HBASE-15204](https://issues.apache.org/jira/browse/HBASE-15204) | Try to estimate the cell count for adding into WALEdit | Major | regionserver |
| [HBASE-15239](https://issues.apache.org/jira/browse/HBASE-15239) | Remove unused LoadBalancer.immediateAssignment() | Trivial | Balancer |
| [HBASE-15238](https://issues.apache.org/jira/browse/HBASE-15238) | HFileReaderV2 prefetch overreaches; runs off the end of the data | Major | . |
| [HBASE-15046](https://issues.apache.org/jira/browse/HBASE-15046) | Perf test doing all mutation steps under row lock | Major | Performance |
| [HBASE-15158](https://issues.apache.org/jira/browse/HBASE-15158) | Change order in which we do write pipeline operations; do all under row locks! | Major | Performance |
| [HBASE-15163](https://issues.apache.org/jira/browse/HBASE-15163) | Add sampling code and metrics for get/scan/multi/mutate count separately | Major | . |
| [HBASE-15157](https://issues.apache.org/jira/browse/HBASE-15157) | Add \*PerformanceTest for Append, CheckAnd\* | Major | Performance, test |
| [HBASE-15094](https://issues.apache.org/jira/browse/HBASE-15094) | Selection of WAL files eligible for incremental backup is broken | Major | . |
| [HBASE-15210](https://issues.apache.org/jira/browse/HBASE-15210) | Undo aggressive load balancer logging at tens of lines per millisecond | Major | Balancer |
| [HBASE-15202](https://issues.apache.org/jira/browse/HBASE-15202) | Reduce garbage while setting response | Minor | regionserver |
| [HBASE-15194](https://issues.apache.org/jira/browse/HBASE-15194) | TestStochasticLoadBalancer.testRegionReplicationOnMidClusterSameHosts flaky on trunk | Major | flakey, test |
| [HBASE-14841](https://issues.apache.org/jira/browse/HBASE-14841) | Allow Dictionary to work with BytebufferedCells | Major | regionserver, Scanners |
| [HBASE-15142](https://issues.apache.org/jira/browse/HBASE-15142) | Procedure v2 - Basic WebUI listing the procedures | Minor | proc-v2, UI |
| [HBASE-15171](https://issues.apache.org/jira/browse/HBASE-15171) | Avoid counting duplicate kv and generating lots of small hfiles in PutSortReducer | Major | . |
| [HBASE-15106](https://issues.apache.org/jira/browse/HBASE-15106) | Procedure V2 - Procedure Queue pass Procedure for better debuggability | Major | proc-v2 |
| [HBASE-14221](https://issues.apache.org/jira/browse/HBASE-14221) | Reduce the number of time row comparison is done in a Scan | Major | Scanners |
| [HBASE-15118](https://issues.apache.org/jira/browse/HBASE-15118) | Fix findbugs complaint in hbase-server | Major | build |
| [HBASE-15115](https://issues.apache.org/jira/browse/HBASE-15115) | Fix findbugs complaints in hbase-client | Major | build |
| [HBASE-14962](https://issues.apache.org/jira/browse/HBASE-14962) | TestSplitWalDataLoss fails on all branches | Blocker | test |
| [HBASE-15114](https://issues.apache.org/jira/browse/HBASE-15114) | NPE when IPC server ByteBuffer reservoir is turned off | Major | . |
| [HBASE-15105](https://issues.apache.org/jira/browse/HBASE-15105) | Procedure V2 - Procedure Queue with Namespaces | Major | proc-v2 |
| [HBASE-14837](https://issues.apache.org/jira/browse/HBASE-14837) | Procedure V2 - Procedure Queue Improvement | Minor | proc-v2 |
| [HBASE-15095](https://issues.apache.org/jira/browse/HBASE-15095) | isReturnResult=false on fast path in branch-1.1 and branch-1.0 is not respected | Major | Performance |
| [HBASE-15087](https://issues.apache.org/jira/browse/HBASE-15087) | Fix hbase-common findbugs complaints | Major | build |
| [HBASE-15077](https://issues.apache.org/jira/browse/HBASE-15077) | Support OffheapKV write in compaction with out copying data on heap | Major | regionserver, Scanners |
| [HBASE-12593](https://issues.apache.org/jira/browse/HBASE-12593) | Tags to work with ByteBuffer | Major | regionserver, Scanners |
| [HBASE-14488](https://issues.apache.org/jira/browse/HBASE-14488) | Procedure V2 - shell command to abort a procedure | Major | proc-v2 |
| [HBASE-14487](https://issues.apache.org/jira/browse/HBASE-14487) | Procedure V2 - shell command to list all procedures | Major | proc-v2, shell |
| [HBASE-14108](https://issues.apache.org/jira/browse/HBASE-14108) | Procedure V2 - Administrative Task: provide an API to abort a procedure | Major | proc-v2 |
| [HBASE-14432](https://issues.apache.org/jira/browse/HBASE-14432) | Procedure V2 - enforce ACL on procedure admin tasks | Major | proc-v2 |
| [HBASE-14107](https://issues.apache.org/jira/browse/HBASE-14107) | Procedure V2 - Administrative Task: Provide an API to List all procedures | Major | proc-v2 |
| [HBASE-15023](https://issues.apache.org/jira/browse/HBASE-15023) | Reenable TestShell and TestStochasticLoadBalancer | Major | test |
| [HBASE-14908](https://issues.apache.org/jira/browse/HBASE-14908) | TestRowCounter flakey especially on branch-1 | Major | flakey, test |
| [HBASE-14863](https://issues.apache.org/jira/browse/HBASE-14863) | Add missing test/resources/log4j files in hbase modules | Trivial | test |
| [HBASE-14947](https://issues.apache.org/jira/browse/HBASE-14947) | Procedure V2 - WALProcedureStore improvements | Blocker | proc-v2 |
| [HBASE-14895](https://issues.apache.org/jira/browse/HBASE-14895) | Seek only to the newly flushed file on scanner reset on flush | Major | . |
| [HBASE-14655](https://issues.apache.org/jira/browse/HBASE-14655) | Narrow the scope of doAs() calls to region observer notifications for compaction | Blocker | Coprocessors, security |
| [HBASE-14631](https://issues.apache.org/jira/browse/HBASE-14631) | Region merge request should be audited with request user through proper scope of doAs() calls to region observer notifications | Blocker | Coprocessors, security |
| [HBASE-14605](https://issues.apache.org/jira/browse/HBASE-14605) | Split fails due to 'No valid credentials' error when SecureBulkLoadEndpoint#start tries to access hdfs | Blocker | Coprocessors, security |
| [HBASE-14772](https://issues.apache.org/jira/browse/HBASE-14772) | Improve zombie detector; be more discerning | Major | test |
| [HBASE-14884](https://issues.apache.org/jira/browse/HBASE-14884) | TestSplitTransactionOnCluster.testSSHCleanupDaugtherRegionsOfAbortedSplit is flakey | Major | flakey, test |
| [HBASE-14909](https://issues.apache.org/jira/browse/HBASE-14909) | NPE testing for RIT | Major | test |
| [HBASE-14575](https://issues.apache.org/jira/browse/HBASE-14575) | Relax region read lock for compactions | Major | Compaction, regionserver |
| [HBASE-14819](https://issues.apache.org/jira/browse/HBASE-14819) | hbase-it tests failing with OOME; permgen | Major | test |
| [HBASE-14832](https://issues.apache.org/jira/browse/HBASE-14832) | Ensure write paths work with ByteBufferedCells in case of compaction | Minor | regionserver, Scanners |
| [HBASE-14798](https://issues.apache.org/jira/browse/HBASE-14798) | NPE reporting server load causes regionserver abort; causes TestAcidGuarantee to fail | Major | test |
| [HBASE-14794](https://issues.apache.org/jira/browse/HBASE-14794) | Cleanup TestAtomicOperation, TestImportExport, and TestMetaWithReplicas | Major | flakey, test |
| [HBASE-14785](https://issues.apache.org/jira/browse/HBASE-14785) | Hamburger menu for mobile site | Major | website |
| [HBASE-14786](https://issues.apache.org/jira/browse/HBASE-14786) | TestProcedureAdmin hangs | Major | hangingTests, test |
| [HBASE-14589](https://issues.apache.org/jira/browse/HBASE-14589) | Looking for the surefire-killer; builds being killed...ExecutionException: java.lang.RuntimeException: The forked VM terminated without properly saying goodbye. VM crash or System.exit called? | Major | test |
| [HBASE-14725](https://issues.apache.org/jira/browse/HBASE-14725) | Vet categorization of tests so they for sure go into the right small/medium/large buckets | Major | test |
| [HBASE-14638](https://issues.apache.org/jira/browse/HBASE-14638) | Move Jython info from the Wiki to the Ref Guide | Major | documentation |
| [HBASE-14639](https://issues.apache.org/jira/browse/HBASE-14639) | Move Scala info from Wiki to Ref Guide | Major | documentation |
| [HBASE-13478](https://issues.apache.org/jira/browse/HBASE-13478) | Document the change of default master ports being used . | Minor | documentation |
| [HBASE-14641](https://issues.apache.org/jira/browse/HBASE-14641) | Move JDO example from Wiki to Ref Guide | Major | documentation |
| [HBASE-14640](https://issues.apache.org/jira/browse/HBASE-14640) | Move Cascading info from Wiki to Ref Guide | Major | documentation |
| [HBASE-14720](https://issues.apache.org/jira/browse/HBASE-14720) | Make TestHCM and TestMetaWithReplicas large tests rather than mediums | Major | hangingTests, test |
| [HBASE-14710](https://issues.apache.org/jira/browse/HBASE-14710) | Add category-based timeouts to MR tests | Major | hangingTests, mapreduce, test |
| [HBASE-14709](https://issues.apache.org/jira/browse/HBASE-14709) | Parent change breaks graceful\_stop.sh on a cluster | Major | Operability |
| [HBASE-14702](https://issues.apache.org/jira/browse/HBASE-14702) | TestZKProcedureControllers.testZKCoordinatorControllerWithSingleMemberCohort is a flakey | Major | flakey, test |
| [HBASE-14698](https://issues.apache.org/jira/browse/HBASE-14698) | Set category timeouts on TestScanner and TestNamespaceAuditor | Major | test |
| [HBASE-14648](https://issues.apache.org/jira/browse/HBASE-14648) | Reenable TestWALProcedureStoreOnHDFS#testWalRollOnLowReplication | Critical | test |
| [HBASE-14685](https://issues.apache.org/jira/browse/HBASE-14685) | Procedure Id is not set for MasterRpcServices#modifyTable | Major | master, proc-v2 |
| [HBASE-14535](https://issues.apache.org/jira/browse/HBASE-14535) | Integration test for rpc connection concurrency / deadlock testing | Major | IPC/RPC |
| [HBASE-14657](https://issues.apache.org/jira/browse/HBASE-14657) | Remove unneeded API from EncodedSeeker | Major | io |
| [HBASE-13538](https://issues.apache.org/jira/browse/HBASE-13538) | Procedure v2 - client add/delete/modify column family sync (incompatible with branch-1.x) | Major | proc-v2 |
| [HBASE-14662](https://issues.apache.org/jira/browse/HBASE-14662) | Fix NPE in HFileOutputFormat2 | Major | . |
| [HBASE-14636](https://issues.apache.org/jira/browse/HBASE-14636) | Clear HFileScannerImpl#prevBlocks in between Compaction flow | Blocker | regionserver, Scanners |
| [HBASE-14595](https://issues.apache.org/jira/browse/HBASE-14595) | For Wiki contents that are also in the Ref Guide, replace content with a URL | Major | documentation |
| [HBASE-14646](https://issues.apache.org/jira/browse/HBASE-14646) | Move TestCellACLs from medium to large category | Minor | test |
| [HBASE-14647](https://issues.apache.org/jira/browse/HBASE-14647) | Disable TestWALProcedureStoreOnHDFS#testWalRollOnLowReplication | Major | test |
| [HBASE-14637](https://issues.apache.org/jira/browse/HBASE-14637) | Loosen TestChoreService assert AND have TestDataBlockEncoders do less work (and add timeouts) | Major | test |
| [HBASE-14627](https://issues.apache.org/jira/browse/HBASE-14627) | Move Stargate docs to Ref Guide | Major | documentation |
| [HBASE-14607](https://issues.apache.org/jira/browse/HBASE-14607) | Convert SupportingProjects wiki page to a site page | Major | documentation |
| [HBASE-14570](https://issues.apache.org/jira/browse/HBASE-14570) | Split TestHBaseFsck in order to help with hanging tests | Major | test |
| [HBASE-14602](https://issues.apache.org/jira/browse/HBASE-14602) | Convert HBasePoweredBy Wiki page to a hbase.apache.org page | Major | documentation |
| [HBASE-14596](https://issues.apache.org/jira/browse/HBASE-14596) | TestCellACLs failing... on1.2 builds | Major | test |
| [HBASE-14600](https://issues.apache.org/jira/browse/HBASE-14600) | Make #testWalRollOnLowReplication looser still | Major | test |
| [HBASE-13819](https://issues.apache.org/jira/browse/HBASE-13819) | Make RPC layer CellBlock buffer a DirectByteBuffer | Major | Scanners |
| [HBASE-14558](https://issues.apache.org/jira/browse/HBASE-14558) | Document ChaosMonkey enhancements from HBASE-14261 | Major | documentation |
| [HBASE-14590](https://issues.apache.org/jira/browse/HBASE-14590) | Shorten ByteBufferedCell#getXXXPositionInByteBuffer method name | Major | regionserver, Scanners |
| [HBASE-14585](https://issues.apache.org/jira/browse/HBASE-14585) | Clean up TestSnapshotCloneIndependence | Major | flakey, test |
| [HBASE-14567](https://issues.apache.org/jira/browse/HBASE-14567) | Tuneup hanging test TestMobCompactor and TestMobSweeper | Major | test |
| [HBASE-14572](https://issues.apache.org/jira/browse/HBASE-14572) | TestImportExport#testImport94Table can't find its src data file | Major | test |
| [HBASE-14571](https://issues.apache.org/jira/browse/HBASE-14571) | Purge TestProcessBasedCluster; it does nothing and then fails | Major | test |
| [HBASE-14519](https://issues.apache.org/jira/browse/HBASE-14519) | Purge TestFavoredNodeAssignmentHelper, a test for an abandoned feature that can hang | Major | test |
| [HBASE-14563](https://issues.apache.org/jira/browse/HBASE-14563) | Disable zombie TestHFileOutputFormat2 | Major | test |
| [HBASE-14561](https://issues.apache.org/jira/browse/HBASE-14561) | Disable zombie TestReplicationShell | Major | test |
| [HBASE-14559](https://issues.apache.org/jira/browse/HBASE-14559) | branch-1 test tweeks; disable assert explicit region lands post-restart and up a few handlers | Major | test |
| [HBASE-14480](https://issues.apache.org/jira/browse/HBASE-14480) | Small optimization in SingleByteBuff | Major | regionserver, Scanners |
| [HBASE-14539](https://issues.apache.org/jira/browse/HBASE-14539) | Slight improvement of StoreScanner.optimize | Minor | Performance, Scanners |
| [HBASE-14543](https://issues.apache.org/jira/browse/HBASE-14543) | Have findHangingTests.py dump more info | Major | tooling |
| [HBASE-14513](https://issues.apache.org/jira/browse/HBASE-14513) | TestBucketCache runs obnoxious 1k threads in a unit test | Major | test |
| [HBASE-14495](https://issues.apache.org/jira/browse/HBASE-14495) | TestHRegion#testFlushCacheWhileScanning goes zombie | Major | test |
| [HBASE-14507](https://issues.apache.org/jira/browse/HBASE-14507) | Disable TestDistributedLogSplitting#testWorkerAbort Its flakey with tenuous chance of success | Major | test |
| [HBASE-14398](https://issues.apache.org/jira/browse/HBASE-14398) | Create the fake keys required in the scan path to avoid copy to byte[] | Major | . |
| [HBASE-14430](https://issues.apache.org/jira/browse/HBASE-14430) | TestHttpServerLifecycle#testStartedServerIsAlive times out | Major | test |
| [HBASE-14212](https://issues.apache.org/jira/browse/HBASE-14212) | Add IT test for procedure-v2-based namespace DDL | Major | proc-v2 |
| [HBASE-14051](https://issues.apache.org/jira/browse/HBASE-14051) | Undo workarounds in IntegrationTestDDLMasterFailover for client double submit | Major | master |
| [HBASE-12748](https://issues.apache.org/jira/browse/HBASE-12748) | RegionCoprocessorHost.execOperation creates too many iterator objects | Major | . |
| [HBASE-14378](https://issues.apache.org/jira/browse/HBASE-14378) | Get TestAccessController\* passing again on branch-1 | Major | . |
| [HBASE-14484](https://issues.apache.org/jira/browse/HBASE-14484) | Follow-on from HBASE-14421, just disable TestFastFail\* until someone digs in and fixes it | Major | test |
| [HBASE-14464](https://issues.apache.org/jira/browse/HBASE-14464) | Removed unused fs code | Minor | regionserver |
| [HBASE-14472](https://issues.apache.org/jira/browse/HBASE-14472) | TestHCM and TestRegionServerNoMaster fixes | Minor | test |
| [HBASE-14147](https://issues.apache.org/jira/browse/HBASE-14147) | REST Support for Namespaces | Minor | REST |
| [HBASE-14447](https://issues.apache.org/jira/browse/HBASE-14447) | Spark tests failing: bind exception when putting up info server | Minor | test |
| [HBASE-14278](https://issues.apache.org/jira/browse/HBASE-14278) | Fix NPE that is showing up since HBASE-14274 went in | Major | test |
| [HBASE-14433](https://issues.apache.org/jira/browse/HBASE-14433) | Set down the client executor core thread count from 256 in tests | Major | test |
| [HBASE-14401](https://issues.apache.org/jira/browse/HBASE-14401) | Stamp failed appends with sequenceid too.... Cleans up latches | Major | test, wal |
| [HBASE-14435](https://issues.apache.org/jira/browse/HBASE-14435) | thrift tests don't have test-specific hbase-site.xml so 'BindException: Address already in use' because info port is not turned off | Major | test |
| [HBASE-14428](https://issues.apache.org/jira/browse/HBASE-14428) | Upgrade our surefire-plugin from 2.18 to 2.18.1 | Major | test |
| [HBASE-14421](https://issues.apache.org/jira/browse/HBASE-14421) | TestFastFail\* are flakey | Major | test |
| [HBASE-14423](https://issues.apache.org/jira/browse/HBASE-14423) | TestStochasticBalancerJmxMetrics.testJmxMetrics\_PerTableMode:183 NullPointer | Major | test |
| [HBASE-14395](https://issues.apache.org/jira/browse/HBASE-14395) | Short circuit last byte check in CellUtil#matchingXXX methods for ByteBufferedCells | Major | regionserver, Scanners |
| [HBASE-14368](https://issues.apache.org/jira/browse/HBASE-14368) | New TestWALLockup broken by addendum added to parent issue | Major | test |
| [HBASE-14322](https://issues.apache.org/jira/browse/HBASE-14322) | Master still not using more than it's priority threads | Major | IPC/RPC, master |
| [HBASE-13212](https://issues.apache.org/jira/browse/HBASE-13212) | Procedure V2 - master Create/Modify/Delete namespace | Major | master |
| [HBASE-14239](https://issues.apache.org/jira/browse/HBASE-14239) | Branch-1.2 AM can get stuck when meta moves | Major | Region Assignment |
| [HBASE-14274](https://issues.apache.org/jira/browse/HBASE-14274) | Deadlock in region metrics on shutdown: MetricsRegionSourceImpl vs MetricsRegionAggregateSourceImpl | Major | test |
| [HBASE-14186](https://issues.apache.org/jira/browse/HBASE-14186) | Read mvcc vlong optimization | Major | Performance, Scanners |
| [HBASE-14144](https://issues.apache.org/jira/browse/HBASE-14144) | Bloomfilter path to work with Byte buffered cells | Major | regionserver, Scanners |
| [HBASE-14087](https://issues.apache.org/jira/browse/HBASE-14087) | ensure correct ASF policy compliant headers on source/docs | Blocker | build |
| [HBASE-14202](https://issues.apache.org/jira/browse/HBASE-14202) | Reduce garbage we create | Major | regionserver, Scanners |
| [HBASE-14105](https://issues.apache.org/jira/browse/HBASE-14105) | Add shell tests for Snapshot | Major | test |
| [HBASE-14188](https://issues.apache.org/jira/browse/HBASE-14188) | Read path optimizations after HBASE-11425 profiling | Major | Scanners |
| [HBASE-14176](https://issues.apache.org/jira/browse/HBASE-14176) | Add missing headers to META-INF files | Trivial | build |
| [HBASE-14086](https://issues.apache.org/jira/browse/HBASE-14086) | remove unused bundled dependencies | Blocker | documentation |
| [HBASE-14063](https://issues.apache.org/jira/browse/HBASE-14063) | Use BufferBackedCell in read path after HBASE-12213 and HBASE-12295 | Major | regionserver, Scanners |
| [HBASE-12295](https://issues.apache.org/jira/browse/HBASE-12295) | Prevent block eviction under us if reads are in progress from the BBs | Major | regionserver, Scanners |
| [HBASE-14116](https://issues.apache.org/jira/browse/HBASE-14116) | Change ByteBuff.getXXXStrictlyForward to relative position based reads | Major | . |
| [HBASE-12374](https://issues.apache.org/jira/browse/HBASE-12374) | Change DBEs to work with new BB based cell | Major | regionserver, Scanners |
| [HBASE-14120](https://issues.apache.org/jira/browse/HBASE-14120) | ByteBufferUtils#compareTo small optimization | Major | regionserver, Scanners |
| [HBASE-14104](https://issues.apache.org/jira/browse/HBASE-14104) | Add vectorportal.com to NOTICES.txt as src of our logo | Major | documentation |
| [HBASE-14102](https://issues.apache.org/jira/browse/HBASE-14102) | Add thank you to our thanks page for vectorportal.com | Major | . |
| [HBASE-12015](https://issues.apache.org/jira/browse/HBASE-12015) | Not cleaning Mob data when Mob CF is removed from table | Major | . |
| [HBASE-13993](https://issues.apache.org/jira/browse/HBASE-13993) | WALProcedureStore fencing is not effective if new WAL rolls | Major | master |
| [HBASE-13387](https://issues.apache.org/jira/browse/HBASE-13387) | Add ByteBufferedCell an extension to Cell | Major | regionserver, Scanners |
| [HBASE-13832](https://issues.apache.org/jira/browse/HBASE-13832) | Procedure V2: master fail to start due to WALProcedureStore sync failures when HDFS data nodes count is low | Blocker | master, proc-v2 |
| [HBASE-13415](https://issues.apache.org/jira/browse/HBASE-13415) | Procedure V2 - Use nonces for double submits from client | Blocker | master |
| [HBASE-14017](https://issues.apache.org/jira/browse/HBASE-14017) | Procedure v2 - MasterProcedureQueue fix concurrency issue on table queue deletion | Blocker | proc-v2 |
| [HBASE-14020](https://issues.apache.org/jira/browse/HBASE-14020) | Unsafe based optimized write in ByteBufferOutputStream | Major | Scanners |
| [HBASE-13998](https://issues.apache.org/jira/browse/HBASE-13998) | Remove CellComparator#compareRows(byte[] left, int loffset, int llength, byte[] right, int roffset, int rlength) | Major | . |
| [HBASE-13977](https://issues.apache.org/jira/browse/HBASE-13977) | Convert getKey and related APIs to Cell | Major | . |
| [HBASE-14013](https://issues.apache.org/jira/browse/HBASE-14013) | Retry when RegionServerNotYetRunningException rather than go ahead with assign so for sure we don't skip WAL replay | Major | Region Assignment |
| [HBASE-13975](https://issues.apache.org/jira/browse/HBASE-13975) | add 1.2 RM to docs | Major | documentation |
| [HBASE-13911](https://issues.apache.org/jira/browse/HBASE-13911) | add 1.2 to prereq tables in ref guide | Blocker | documentation |
| [HBASE-13990](https://issues.apache.org/jira/browse/HBASE-13990) | clean up remaining errors for maven site goal | Major | documentation |
| [HBASE-14003](https://issues.apache.org/jira/browse/HBASE-14003) | work around jdk8 spec bug in WALPerfEval | Critical | test |
| [HBASE-13939](https://issues.apache.org/jira/browse/HBASE-13939) | Make HFileReaderImpl.getFirstKeyInBlock() to return a Cell | Minor | . |
| [HBASE-13614](https://issues.apache.org/jira/browse/HBASE-13614) | Avoid temp KeyOnlyKeyValue temp objects creations in read hot path | Critical | . |
| [HBASE-12345](https://issues.apache.org/jira/browse/HBASE-12345) | Unsafe based ByteBuffer Comparator | Major | regionserver, Scanners |
| [HBASE-13922](https://issues.apache.org/jira/browse/HBASE-13922) | Do not reset mvcc in compactions for mob-enabled column | Major | mob |
| [HBASE-13968](https://issues.apache.org/jira/browse/HBASE-13968) | Remove deprecated methods from BufferedMutator class | Major | API |
| [HBASE-13973](https://issues.apache.org/jira/browse/HBASE-13973) | Update documentation for 10070 Phase 2 changes | Major | . |
| [HBASE-13967](https://issues.apache.org/jira/browse/HBASE-13967) | add jdk profiles for jdk.tools dependency | Major | . |
| [HBASE-13950](https://issues.apache.org/jira/browse/HBASE-13950) | Add a NoopProcedureStore for testing | Trivial | proc-v2 |
| [HBASE-13920](https://issues.apache.org/jira/browse/HBASE-13920) | Exclude Java files generated from protobuf from javadoc | Minor | . |
| [HBASE-13932](https://issues.apache.org/jira/browse/HBASE-13932) | Add mob integrity check in HFilePrettyPrinter | Major | mob |
| [HBASE-13898](https://issues.apache.org/jira/browse/HBASE-13898) | correct additional javadoc failures under java 8 | Minor | documentation |
| [HBASE-13728](https://issues.apache.org/jira/browse/HBASE-13728) | Remove use of Hadoop's GenericOptionsParser | Blocker | . |
| [HBASE-13448](https://issues.apache.org/jira/browse/HBASE-13448) | New Cell implementation with cached component offsets/lengths | Blocker | Scanners |
| [HBASE-13926](https://issues.apache.org/jira/browse/HBASE-13926) | Close the scanner only after Call#setResponse | Major | regionserver, Scanners |
| [HBASE-13916](https://issues.apache.org/jira/browse/HBASE-13916) | Create MultiByteBuffer an aggregation of ByteBuffers | Major | regionserver, Scanners |
| [HBASE-13470](https://issues.apache.org/jira/browse/HBASE-13470) | High level Integration test for master DDL operations | Major | master |
| [HBASE-13886](https://issues.apache.org/jira/browse/HBASE-13886) | Return empty value when the mob file is corrupt instead of throwing exceptions | Major | mob |
| [HBASE-13910](https://issues.apache.org/jira/browse/HBASE-13910) | add branch-1.2 to precommit branches | Major | build |
| [HBASE-13899](https://issues.apache.org/jira/browse/HBASE-13899) | Jacoco instrumentation fails under jdk8 | Major | build, test |
| [HBASE-13569](https://issues.apache.org/jira/browse/HBASE-13569) | correct errors reported with mvn site | Minor | documentation |
| [HBASE-13855](https://issues.apache.org/jira/browse/HBASE-13855) | Race in multi threaded PartitionedMobCompactor causes NPE | Critical | mob |
| [HBASE-13871](https://issues.apache.org/jira/browse/HBASE-13871) | Change RegionScannerImpl to deal with Cell instead of byte[], int, int | Major | regionserver, Scanners |
| [HBASE-13836](https://issues.apache.org/jira/browse/HBASE-13836) | Do not reset the mvcc for bulk loaded mob reference cells in reading | Major | mob |
| [HBASE-13451](https://issues.apache.org/jira/browse/HBASE-13451) | Make the HFileBlockIndex blockKeys to Cells so that it could be easy to use in the CellComparators | Major | . |
| [HBASE-13856](https://issues.apache.org/jira/browse/HBASE-13856) | Wrong mob metrics names in TestRegionServerMetrics | Major | mob |
| [HBASE-13806](https://issues.apache.org/jira/browse/HBASE-13806) | Check the mob files when there are mob-enabled columns in HFileCorruptionChecker | Major | mob |
| [HBASE-13827](https://issues.apache.org/jira/browse/HBASE-13827) | Delayed scanner close in KeyValueHeap and StoreScanner | Major | regionserver, Scanners |
| [HBASE-13817](https://issues.apache.org/jira/browse/HBASE-13817) | ByteBufferOuputStream - add writeInt support | Major | Scanners |
| [HBASE-13804](https://issues.apache.org/jira/browse/HBASE-13804) | Revert the changes in pom.xml | Major | mob |
| [HBASE-13803](https://issues.apache.org/jira/browse/HBASE-13803) | Disable the MobCompactionChore when the interval is not larger than 0 | Major | mob |
| [HBASE-13805](https://issues.apache.org/jira/browse/HBASE-13805) | Use LimitInputStream in hbase-common instead of ProtobufUtil.LimitedInputStream | Major | mob |
| [HBASE-13759](https://issues.apache.org/jira/browse/HBASE-13759) | Improve procedure yielding | Trivial | proc-v2 |
| [HBASE-13790](https://issues.apache.org/jira/browse/HBASE-13790) | Remove the DeleteTableHandler | Major | mob |
| [HBASE-13616](https://issues.apache.org/jira/browse/HBASE-13616) | Move ServerShutdownHandler to Pv2 | Major | proc-v2 |
| [HBASE-13476](https://issues.apache.org/jira/browse/HBASE-13476) | Procedure V2 - Add Replay Order logic for child procedures | Major | proc-v2 |
| [HBASE-13763](https://issues.apache.org/jira/browse/HBASE-13763) | Handle the rename, annotation and typo stuff in MOB | Major | mob |
| [HBASE-13754](https://issues.apache.org/jira/browse/HBASE-13754) | Allow non KeyValue Cell types also to oswrite | Major | Scanners |
| [HBASE-13393](https://issues.apache.org/jira/browse/HBASE-13393) | Optimize memstore flushing to avoid writing tag information to hfiles when no tags are present. | Major | HFile, Performance |
| [HBASE-13658](https://issues.apache.org/jira/browse/HBASE-13658) | Improve the test run time for TestAccessController class | Major | test |
| [HBASE-13762](https://issues.apache.org/jira/browse/HBASE-13762) | Use the same HFileContext with store files in mob files | Major | mob |
| [HBASE-13720](https://issues.apache.org/jira/browse/HBASE-13720) | Mob files are not encrypting in mob compaction and Sweeper | Major | regionserver, Scanners |
| [HBASE-13739](https://issues.apache.org/jira/browse/HBASE-13739) | Remove KeyValueUtil.ensureKeyValue(cell) from MOB code. | Major | mob |
| [HBASE-13641](https://issues.apache.org/jira/browse/HBASE-13641) | Deperecate Filter#filterRowKey(byte[] buffer, int offset, int length) in favor of filterRowKey(Cell firstRowCell) | Major | Filters, regionserver, Scanners |
| [HBASE-13736](https://issues.apache.org/jira/browse/HBASE-13736) | Add delay for the first execution of ExpiredMobFileCleanerChore and MobFileCompactorChore | Major | mob |
| [HBASE-13642](https://issues.apache.org/jira/browse/HBASE-13642) | Deprecate RegionObserver#postScannerFilterRow CP hook with byte[],int,int args in favor of taking Cell arg | Major | Coprocessors, regionserver, Scanners |
| [HBASE-13679](https://issues.apache.org/jira/browse/HBASE-13679) | Change ColumnTracker and SQM to deal with Cell instead of byte[], int, int | Major | regionserver, Scanners |
| [HBASE-13531](https://issues.apache.org/jira/browse/HBASE-13531) | Flakey failures of TestAcidGuarantees#testMobScanAtomicity | Major | regionserver, Scanners |
| [HBASE-13510](https://issues.apache.org/jira/browse/HBASE-13510) | Purge ByteBloomFilter | Major | . |
| [HBASE-13398](https://issues.apache.org/jira/browse/HBASE-13398) | Document HBase Quota | Major | documentation |
| [HBASE-13201](https://issues.apache.org/jira/browse/HBASE-13201) | Remove HTablePool from thrift-server | Major | . |
| [HBASE-13571](https://issues.apache.org/jira/browse/HBASE-13571) | Procedure v2 - client modify table sync (incompatible with branch-1.x) | Minor | proc-v2 |
| [HBASE-13593](https://issues.apache.org/jira/browse/HBASE-13593) | Quota support for namespace should take snapshot restore and clone into account | Major | snapshots |
| [HBASE-13620](https://issues.apache.org/jira/browse/HBASE-13620) | Bring back the removed VisibilityClient methods and mark them as deprecated. | Minor | . |
| [HBASE-13464](https://issues.apache.org/jira/browse/HBASE-13464) | Remove deprecations for 2.0.0 - Part 1 | Major | . |
| [HBASE-13501](https://issues.apache.org/jira/browse/HBASE-13501) | Deprecate/Remove getComparator() in HRegionInfo. | Major | . |
| [HBASE-13497](https://issues.apache.org/jira/browse/HBASE-13497) | Remove MVCC stamps from HFile when that is safe | Major | Scanners |
| [HBASE-13184](https://issues.apache.org/jira/browse/HBASE-13184) | Document turning off memstore for region replicas | Critical | documentation, Replication |
| [HBASE-13537](https://issues.apache.org/jira/browse/HBASE-13537) | Procedure V2 - Change the admin interface for async operations to return Future (incompatible with branch-1.x) | Major | proc-v2 |
| [HBASE-13572](https://issues.apache.org/jira/browse/HBASE-13572) | Procedure v2 - client truncate table sync (incompatible with branch-1.x) | Minor | proc-v2 |
| [HBASE-13551](https://issues.apache.org/jira/browse/HBASE-13551) | Procedure V2 - Procedure classes should not be InterfaceAudience.Public | Blocker | master |
| [HBASE-13563](https://issues.apache.org/jira/browse/HBASE-13563) | Add missing table owner to AC tests. | Minor | . |
| [HBASE-13466](https://issues.apache.org/jira/browse/HBASE-13466) | Document deprecations in 1.x - Part 1 | Major | . |
| [HBASE-13536](https://issues.apache.org/jira/browse/HBASE-13536) | Cleanup the handlers that are no longer being used. | Major | proc-v2 |
| [HBASE-13450](https://issues.apache.org/jira/browse/HBASE-13450) | Purge RawBytescomparator from the writers and readers for HBASE-10800 | Major | . |
| [HBASE-13529](https://issues.apache.org/jira/browse/HBASE-13529) | Procedure v2 - WAL Improvements | Blocker | proc-v2 |
| [HBASE-13496](https://issues.apache.org/jira/browse/HBASE-13496) | Make Bytes$LexicographicalComparerHolder$UnsafeComparer::compareTo inlineable | Major | Scanners |
| [HBASE-13502](https://issues.apache.org/jira/browse/HBASE-13502) | Deprecate/remove getRowComparator() in TableName | Major | . |
| [HBASE-13515](https://issues.apache.org/jira/browse/HBASE-13515) | Handle FileNotFoundException in region replica replay for flush/compaction events | Major | . |
| [HBASE-13514](https://issues.apache.org/jira/browse/HBASE-13514) | Fix test failures in TestScannerHeartbeatMessages caused by incorrect setting of hbase.rpc.timeout | Minor | . |
| [HBASE-13498](https://issues.apache.org/jira/browse/HBASE-13498) | Add more docs and a basic check for storage policy handling | Minor | wal |
| [HBASE-13481](https://issues.apache.org/jira/browse/HBASE-13481) | Master should respect master (old) DNS/bind related configurations | Major | . |
| [HBASE-13307](https://issues.apache.org/jira/browse/HBASE-13307) | Making methods under ScannerV2#next inlineable, faster | Major | Scanners |
| [HBASE-13455](https://issues.apache.org/jira/browse/HBASE-13455) | Procedure V2 - master truncate table | Minor | master |
| [HBASE-13290](https://issues.apache.org/jira/browse/HBASE-13290) | Procedure v2 - client enable/disable table sync | Major | Client |
| [HBASE-13211](https://issues.apache.org/jira/browse/HBASE-13211) | Procedure V2 - master Enable/Disable table | Major | master |
| [HBASE-13210](https://issues.apache.org/jira/browse/HBASE-13210) | Procedure V2 - master Modify table | Major | master |
| [HBASE-13209](https://issues.apache.org/jira/browse/HBASE-13209) | Procedure V2 - master Add/Modify/Delete Column Family | Major | master |
| [HBASE-13204](https://issues.apache.org/jira/browse/HBASE-13204) | Procedure v2 - client create/delete table sync | Minor | master |
| [HBASE-13203](https://issues.apache.org/jira/browse/HBASE-13203) | Procedure v2 - master create/delete table | Minor | master |
| [HBASE-13202](https://issues.apache.org/jira/browse/HBASE-13202) | Procedure v2 - core framework | Major | master, proc-v2 |
| [HBASE-13447](https://issues.apache.org/jira/browse/HBASE-13447) | Bypass logic in TimeRange.compare | Minor | Scanners |
| [HBASE-13313](https://issues.apache.org/jira/browse/HBASE-13313) | Skip the disabled table in mob compaction chore and MasterRpcServices | Major | regionserver, Scanners |
| [HBASE-13429](https://issues.apache.org/jira/browse/HBASE-13429) | Remove deprecated seek/reseek methods from HFileScanner | Major | regionserver, Scanners |
| [HBASE-13421](https://issues.apache.org/jira/browse/HBASE-13421) | Reduce the number of object creations introduced by HBASE-11544 in scan RPC hot code paths | Major | . |
| [HBASE-13302](https://issues.apache.org/jira/browse/HBASE-13302) | fix new javadoc warns introduced by mob. | Major | regionserver, Scanners |
| [HBASE-13277](https://issues.apache.org/jira/browse/HBASE-13277) | add mob\_threshold option to load test tool | Major | regionserver, Scanners |
| [HBASE-13252](https://issues.apache.org/jira/browse/HBASE-13252) | Get rid of managed connections and connection caching | Major | API |
| [HBASE-13335](https://issues.apache.org/jira/browse/HBASE-13335) | Update ClientSmallScanner and ClientSmallReversedScanner | Major | Client |
| [HBASE-13213](https://issues.apache.org/jira/browse/HBASE-13213) | Split out locality metrics among primary and secondary region | Major | . |
| [HBASE-13303](https://issues.apache.org/jira/browse/HBASE-13303) | Fix size calculation of results on the region server | Major | Client |
| [HBASE-13332](https://issues.apache.org/jira/browse/HBASE-13332) | Fix the usage of doAs/runAs in Visibility Controller tests. | Major | . |
| [HBASE-13327](https://issues.apache.org/jira/browse/HBASE-13327) | Use Admin in ConnectionCache | Major | . |
| [HBASE-13258](https://issues.apache.org/jira/browse/HBASE-13258) | Promote TestHRegion to LargeTests | Major | test |
| [HBASE-13006](https://issues.apache.org/jira/browse/HBASE-13006) | Document visibility label support for groups | Minor | . |
| [HBASE-13230](https://issues.apache.org/jira/browse/HBASE-13230) | [mob] reads hang when trying to read rows with large mobs (\>10MB) | Major | mob |
| [HBASE-13244](https://issues.apache.org/jira/browse/HBASE-13244) | Test delegation token generation with kerberos enabled | Major | security, test |
| [HBASE-13226](https://issues.apache.org/jira/browse/HBASE-13226) | Document enable\_table\_replication and disable\_table\_replication shell commands | Minor | documentation |
| [HBASE-13169](https://issues.apache.org/jira/browse/HBASE-13169) | ModifyTable increasing the region replica count should also auto-setup RRRE | Major | . |
| [HBASE-13121](https://issues.apache.org/jira/browse/HBASE-13121) | Async wal replication for region replicas and dist log replay does not work together | Major | . |
| [HBASE-13095](https://issues.apache.org/jira/browse/HBASE-13095) | Document how to retrieve replication stats from HBase Shell | Major | documentation, Replication |
| [HBASE-13164](https://issues.apache.org/jira/browse/HBASE-13164) | Update TestUsersOperationsWithSecureHadoop to use MiniKdc | Major | security, test |
| [HBASE-12562](https://issues.apache.org/jira/browse/HBASE-12562) | Handling memory pressure for secondary region replicas | Major | . |
| [HBASE-13151](https://issues.apache.org/jira/browse/HBASE-13151) | IllegalArgumentException in compaction when table has a namespace | Major | regionserver, Scanners |
| [HBASE-13107](https://issues.apache.org/jira/browse/HBASE-13107) | Refactor MOB Snapshot logic to reduce code duplication. | Major | mob, snapshots |
| [HBASE-13157](https://issues.apache.org/jira/browse/HBASE-13157) | Add mob compaction actions and monkeys to Chaos Monkey | Major | integration tests, mob |
| [HBASE-12332](https://issues.apache.org/jira/browse/HBASE-12332) | [mob] improve how we resolve mobfiles in reads | Major | mob |
| [HBASE-13154](https://issues.apache.org/jira/browse/HBASE-13154) | Add support for mob in TestAcidGuarantees and IntegrationTestAcidGuarantees | Major | integration tests, mob |
| [HBASE-13012](https://issues.apache.org/jira/browse/HBASE-13012) | Add shell commands to trigger the mob file compactor | Major | regionserver, Scanners |
| [HBASE-11580](https://issues.apache.org/jira/browse/HBASE-11580) | Failover handling for secondary region replicas | Major | . |
| [HBASE-13152](https://issues.apache.org/jira/browse/HBASE-13152) | NPE in ExpiredMobFileCleanerChore | Major | regionserver, Scanners |
| [HBASE-11571](https://issues.apache.org/jira/browse/HBASE-11571) | Bulk load handling from secondary region replicas | Major | . |
| [HBASE-12670](https://issues.apache.org/jira/browse/HBASE-12670) | Add unit tests that exercise the added hfilelink link mob paths | Major | regionserver, Scanners |
| [HBASE-13130](https://issues.apache.org/jira/browse/HBASE-13130) | Add timeouts on TestMasterObserver, a frequent zombie show | Major | test |
| [HBASE-13117](https://issues.apache.org/jira/browse/HBASE-13117) | improve mob sweeper javadoc | Major | mob |
| [HBASE-13067](https://issues.apache.org/jira/browse/HBASE-13067) | Fix caching of stubs to allow IP address changes of restarted remote servers | Major | . |
| [HBASE-12561](https://issues.apache.org/jira/browse/HBASE-12561) | Replicas of regions can be cached from different instances of the table in MetaCache | Major | . |
| [HBASE-12714](https://issues.apache.org/jira/browse/HBASE-12714) | RegionReplicaReplicationEndpoint should not set the RPC Codec | Major | . |
| [HBASE-11842](https://issues.apache.org/jira/browse/HBASE-11842) | Integration test for async wal replication to secondary regions | Major | . |
| [HBASE-13013](https://issues.apache.org/jira/browse/HBASE-13013) | Add read lock to ExpiredMobFileCleanerChore | Major | master |
| [HBASE-12425](https://issues.apache.org/jira/browse/HBASE-12425) | Document the phases of the split transaction | Major | documentation |
| [HBASE-11569](https://issues.apache.org/jira/browse/HBASE-11569) | Flush / Compaction handling from secondary region replicas | Major | . |
| [HBASE-11910](https://issues.apache.org/jira/browse/HBASE-11910) | Document Premptive Call Me Maybe HBase findings in the online manual | Major | . |
| [HBASE-11567](https://issues.apache.org/jira/browse/HBASE-11567) | Write bulk load COMMIT events to WAL | Major | . |
| [HBASE-11568](https://issues.apache.org/jira/browse/HBASE-11568) | Async WAL replication for region replicas | Major | . |
| [HBASE-11861](https://issues.apache.org/jira/browse/HBASE-11861) | Native MOB Compaction mechanisms. | Major | regionserver, Scanners |
| [HBASE-10942](https://issues.apache.org/jira/browse/HBASE-10942) | support parallel request cancellation for multi-get | Major | . |
| [HBASE-12936](https://issues.apache.org/jira/browse/HBASE-12936) | Quota support for namespace should take region merge into account | Major | . |
| [HBASE-11574](https://issues.apache.org/jira/browse/HBASE-11574) | hbase:meta's regions can be replicated | Major | . |
| [HBASE-11908](https://issues.apache.org/jira/browse/HBASE-11908) | Region replicas should be added to the meta table at the time of table creation | Major | . |
| [HBASE-7847](https://issues.apache.org/jira/browse/HBASE-7847) | Use zookeeper multi to clear znodes | Major | . |
| [HBASE-12669](https://issues.apache.org/jira/browse/HBASE-12669) | Have compaction scanner save info about delete markers | Major | regionserver, Scanners |
| [HBASE-8410](https://issues.apache.org/jira/browse/HBASE-8410) | Basic quota support for namespaces | Major | . |
| [HBASE-12820](https://issues.apache.org/jira/browse/HBASE-12820) | Use table lock instead of MobZookeeper | Major | regionserver, Scanners |
| [HBASE-12848](https://issues.apache.org/jira/browse/HBASE-12848) | Utilize Flash storage for WAL | Major | . |
| [HBASE-12708](https://issues.apache.org/jira/browse/HBASE-12708) | Document newly introduced params for using Thrift-over-HTTPS. | Minor | documentation, Thrift |
| [HBASE-11533](https://issues.apache.org/jira/browse/HBASE-11533) | AsciiDoctor POC | Minor | build, documentation |
| [HBASE-12695](https://issues.apache.org/jira/browse/HBASE-12695) | JDK 1.8 compilation broken | Critical | build |
| [HBASE-12331](https://issues.apache.org/jira/browse/HBASE-12331) | Shorten the mob snapshot unit tests | Major | mob |
| [HBASE-12698](https://issues.apache.org/jira/browse/HBASE-12698) | Add mob cell count to the metadata of each mob file | Major | regionserver |
| [HBASE-12758](https://issues.apache.org/jira/browse/HBASE-12758) | treat mob region as any other region when generating rs manifest. | Major | mob, snapshots |
| [HBASE-12012](https://issues.apache.org/jira/browse/HBASE-12012) | Improve cancellation for the scan RPCs | Major | . |
| [HBASE-12738](https://issues.apache.org/jira/browse/HBASE-12738) | Chunk Ref Guide into file-per-chapter | Major | documentation |
| [HBASE-12528](https://issues.apache.org/jira/browse/HBASE-12528) | Document the newly introduced params for providing principal and keytabs. | Minor | documentation |
| [HBASE-12691](https://issues.apache.org/jira/browse/HBASE-12691) | sweep job needs to exit non-zero if job fails for any reason. | Major | mob |
| [HBASE-12648](https://issues.apache.org/jira/browse/HBASE-12648) | Document per cell TTLs | Minor | documentation |
| [HBASE-12646](https://issues.apache.org/jira/browse/HBASE-12646) | SnapshotInfo tool does not find mob data in snapshots | Major | mob, snapshots |
| [HBASE-11903](https://issues.apache.org/jira/browse/HBASE-11903) | Directly invoking split & merge of replica regions should be disallowed | Major | . |
| [HBASE-12523](https://issues.apache.org/jira/browse/HBASE-12523) | Update checkstyle plugin rules to match our use | Minor | build |
| [HBASE-12591](https://issues.apache.org/jira/browse/HBASE-12591) | Ignore the count of mob compaction metrics when there is issue | Minor | regionserver |
| [HBASE-12543](https://issues.apache.org/jira/browse/HBASE-12543) | Incorrect log info in the store compaction of mob | Minor | regionserver |
| [HBASE-12487](https://issues.apache.org/jira/browse/HBASE-12487) | Explicitly flush the file name in sweep job | Major | regionserver, Scanners |
| [HBASE-12486](https://issues.apache.org/jira/browse/HBASE-12486) | Move the mob table name tag to the 2nd one | Major | regionserver, Scanners |
| [HBASE-12489](https://issues.apache.org/jira/browse/HBASE-12489) | Incorrect 'mobFileCacheMissCount' calculated in the mob metrics | Major | regionserver, Scanners |
| [HBASE-12382](https://issues.apache.org/jira/browse/HBASE-12382) | Restore incremental compilation | Major | . |
| [HBASE-12343](https://issues.apache.org/jira/browse/HBASE-12343) | Document recommended configuration for 0.98 from HBASE-11964 | Major | . |
| [HBASE-4625](https://issues.apache.org/jira/browse/HBASE-4625) | Convert @deprecated HBaseTestCase tests JUnit4 style tests | Minor | . |
| [HBASE-12392](https://issues.apache.org/jira/browse/HBASE-12392) | Incorrect implementation of CompactionRequest.isRetainDeleteMarkers | Critical | regionserver, Scanners |
| [HBASE-12391](https://issues.apache.org/jira/browse/HBASE-12391) | Correct a typo in the mob metrics | Minor | regionserver, Scanners |
| [HBASE-11683](https://issues.apache.org/jira/browse/HBASE-11683) | Metrics for MOB | Major | regionserver, Scanners |
| [HBASE-11912](https://issues.apache.org/jira/browse/HBASE-11912) | Catch some bad practices at compile time with error-prone | Major | . |
| [HBASE-11645](https://issues.apache.org/jira/browse/HBASE-11645) | Snapshot for MOB | Major | snapshots |
| [HBASE-12093](https://issues.apache.org/jira/browse/HBASE-12093) | Support the mob attributes in hbase shell when create/alter table | Major | shell |
| [HBASE-12085](https://issues.apache.org/jira/browse/HBASE-12085) | mob status should print human readable numbers. | Major | mob, UI |
| [HBASE-12080](https://issues.apache.org/jira/browse/HBASE-12080) | Shorten the run time of integration test by default when using mvn failsafe:integration-test | Major | test |
| [HBASE-12066](https://issues.apache.org/jira/browse/HBASE-12066) | Avoid major compaction in TestMobSweeper | Major | Compaction, mob |
| [HBASE-11644](https://issues.apache.org/jira/browse/HBASE-11644) | External MOB compaction tools | Major | Compaction, master |
| [HBASE-11472](https://issues.apache.org/jira/browse/HBASE-11472) | Remove ZKTableStateClientSideReader class | Major | Client, Consensus, Zookeeper |
| [HBASE-11598](https://issues.apache.org/jira/browse/HBASE-11598) | Add simple rpc throttling | Minor | . |
| [HBASE-8139](https://issues.apache.org/jira/browse/HBASE-8139) | Allow job names to be overridden | Major | mapreduce, Usability |
| [HBASE-11646](https://issues.apache.org/jira/browse/HBASE-11646) | Handle the MOB in compaction | Major | Compaction |
| [HBASE-11986](https://issues.apache.org/jira/browse/HBASE-11986) | Document MOB in Ref Guide | Major | documentation |
| [HBASE-12000](https://issues.apache.org/jira/browse/HBASE-12000) | isMob and mobThreshold do not follow column descriptor property naming conventions | Major | regionserver, Scanners |
| [HBASE-11975](https://issues.apache.org/jira/browse/HBASE-11975) | Remove the explicit list of maven repositories in pom.xml | Major | . |
| [HBASE-7767](https://issues.apache.org/jira/browse/HBASE-7767) | Get rid of ZKTable, and table enable/disable state in ZK | Major | Zookeeper |
| [HBASE-11647](https://issues.apache.org/jira/browse/HBASE-11647) | MOB integration testing | Major | Performance, test |
| [HBASE-11911](https://issues.apache.org/jira/browse/HBASE-11911) | Break up tests into more fine grained categories | Major | . |
| [HBASE-11901](https://issues.apache.org/jira/browse/HBASE-11901) | Improve the value size of the reference cell in mob column | Major | . |
| [HBASE-11786](https://issues.apache.org/jira/browse/HBASE-11786) | Document web UI for tracking time spent in coprocessors | Minor | Coprocessors, documentation |
| [HBASE-11643](https://issues.apache.org/jira/browse/HBASE-11643) | Read and write MOB in HBase | Major | regionserver, Scanners |
| [HBASE-11779](https://issues.apache.org/jira/browse/HBASE-11779) | Document the new requirement to set JAVA\_HOME before starting HBase | Major | documentation |
| [HBASE-11607](https://issues.apache.org/jira/browse/HBASE-11607) | Document HBase metrics | Major | documentation, metrics |
| [HBASE-10674](https://issues.apache.org/jira/browse/HBASE-10674) | HBCK should be updated to do replica related checks | Major | . |
| [HBASE-4624](https://issues.apache.org/jira/browse/HBASE-4624) | Remove and convert @deprecated RemoteExceptionHandler.decodeRemoteException calls | Major | . |
| [HBASE-11261](https://issues.apache.org/jira/browse/HBASE-11261) | Handle splitting/merging of regions that have region\_replication greater than one | Major | . |
### OTHER:
| JIRA | Summary | Priority | Component |
|:---- |:---- | :--- |:---- |
| [HBASE-8770](https://issues.apache.org/jira/browse/HBASE-8770) | deletes and puts with the same ts should be resolved according to mvcc/seqNum | Blocker | . |
| [HBASE-20067](https://issues.apache.org/jira/browse/HBASE-20067) | Clean up findbugs warnings | Critical | . |
| [HBASE-10403](https://issues.apache.org/jira/browse/HBASE-10403) | Simplify offheap cache configuration | Minor | io |
| [HBASE-19976](https://issues.apache.org/jira/browse/HBASE-19976) | Dead lock if the worker threads in procedure executor are exhausted | Critical | . |
| [HBASE-19948](https://issues.apache.org/jira/browse/HBASE-19948) | Since HBASE-19873, HBaseClassTestRule, Small/Medium/Large has different semantic | Major | . |
| [HBASE-19296](https://issues.apache.org/jira/browse/HBASE-19296) | Fix findbugs and error-prone warnings (branch-2) | Major | . |
| [HBASE-19425](https://issues.apache.org/jira/browse/HBASE-19425) | Align the methods in Put/Delete/Increment/Append | Major | . |
| [HBASE-19627](https://issues.apache.org/jira/browse/HBASE-19627) | Stabilize the method signature for Cell and its impl | Critical | . |
| [HBASE-18429](https://issues.apache.org/jira/browse/HBASE-18429) | ITs attempt to modify immutable table/column descriptors | Critical | integration tests |
| [HBASE-18110](https://issues.apache.org/jira/browse/HBASE-18110) | [AMv2] Reenable tests temporarily disabled | Blocker | Region Assignment |
| [HBASE-18978](https://issues.apache.org/jira/browse/HBASE-18978) | Align the methods in Table and AsyncTable | Critical | asyncclient, Client |
| [HBASE-18805](https://issues.apache.org/jira/browse/HBASE-18805) | Unify Admin and AsyncAdmin | Major | . |
| [HBASE-18703](https://issues.apache.org/jira/browse/HBASE-18703) | Inconsistent behavior for preBatchMutate in doMiniBatchMutate and processRowsWithLocks | Critical | Coprocessors |
| [HBASE-18926](https://issues.apache.org/jira/browse/HBASE-18926) | Cleanup Optional\<T\> from method params | Major | . |
| [HBASE-17143](https://issues.apache.org/jira/browse/HBASE-17143) | Scan improvement | Blocker | Client, scan |
| [HBASE-18751](https://issues.apache.org/jira/browse/HBASE-18751) | Revisit the TimeRange and TimeRangeTracker | Major | . |
| [HBASE-7320](https://issues.apache.org/jira/browse/HBASE-7320) | Remove KeyValue.getBuffer() | Blocker | . |
| [HBASE-10462](https://issues.apache.org/jira/browse/HBASE-10462) | Recategorize some of the client facing Public / Private interfaces | Blocker | Client |
| [HBASE-18696](https://issues.apache.org/jira/browse/HBASE-18696) | Fix the problems when introducing the new hbase-mapreduce module | Blocker | mapreduce |
| [HBASE-18501](https://issues.apache.org/jira/browse/HBASE-18501) | Use TableDescriptor and ColumnFamilyDescriptor as far as possible | Critical | . |
| [HBASE-18266](https://issues.apache.org/jira/browse/HBASE-18266) | Eliminate the warnings from the spotbugs | Major | . |
| [HBASE-17359](https://issues.apache.org/jira/browse/HBASE-17359) | Implement async admin | Major | Client |
| [HBASE-15086](https://issues.apache.org/jira/browse/HBASE-15086) | Fix findbugs complaint so yetus reports more green | Major | build |
| [HBASE-6581](https://issues.apache.org/jira/browse/HBASE-6581) | Build with hadoop.profile=3.0 | Major | . |
| [HBASE-16617](https://issues.apache.org/jira/browse/HBASE-16617) | Procedure V2 - Improvements | Minor | master, proc-v2 |
| [HBASE-16833](https://issues.apache.org/jira/browse/HBASE-16833) | Implement asynchronous hbase client based on HBASE-15921 | Major | Client |
| [HBASE-18037](https://issues.apache.org/jira/browse/HBASE-18037) | Do not expose implementation classes to CP | Blocker | Coprocessors |
| [HBASE-15179](https://issues.apache.org/jira/browse/HBASE-15179) | Cell/DBB end-to-end on the write-path | Major | regionserver |
| [HBASE-16145](https://issues.apache.org/jira/browse/HBASE-16145) | MultiRowRangeFilter constructor shouldn't throw IOException | Minor | . |
| [HBASE-16567](https://issues.apache.org/jira/browse/HBASE-16567) | Upgrade to protobuf-3.1.x | Critical | Protobufs |
| [HBASE-11871](https://issues.apache.org/jira/browse/HBASE-11871) | Avoid usage of KeyValueUtil#ensureKeyValue | Major | regionserver |
| [HBASE-16432](https://issues.apache.org/jira/browse/HBASE-16432) | Revisit the asynchronous ipc implementation | Major | rpc |
| [HBASE-14460](https://issues.apache.org/jira/browse/HBASE-14460) | [Perf Regression] Merge of MVCC and SequenceId (HBASE-8763) slowed Increments, CheckAndPuts, batch operations | Critical | Performance |
| [HBASE-11425](https://issues.apache.org/jira/browse/HBASE-11425) | Cell/DBB end-to-end on the read-path | Major | regionserver, Scanners |
| [HBASE-14457](https://issues.apache.org/jira/browse/HBASE-14457) | Umbrella: Improve Multiple WAL for production usage | Major | . |
| [HBASE-14420](https://issues.apache.org/jira/browse/HBASE-14420) | Zombie Stomping Session | Critical | test |
| [HBASE-14869](https://issues.apache.org/jira/browse/HBASE-14869) | Better request latency and size histograms | Major | . |
| [HBASE-11339](https://issues.apache.org/jira/browse/HBASE-11339) | HBase MOB | Major | regionserver, Scanners |
| [HBASE-13747](https://issues.apache.org/jira/browse/HBASE-13747) | Promote Java 8 to "yes" in support matrix | Critical | java |
| [HBASE-7781](https://issues.apache.org/jira/browse/HBASE-7781) | Update security unit tests to use a KDC if available | Blocker | security, test |
| [HBASE-12859](https://issues.apache.org/jira/browse/HBASE-12859) | New master API to track major compaction completion | Major | . |
| [HBASE-18792](https://issues.apache.org/jira/browse/HBASE-18792) | hbase-2 needs to defend against hbck operations | Blocker | hbck |
| [HBASE-19963](https://issues.apache.org/jira/browse/HBASE-19963) | TestFSHDFSUtils assumes wrong default port for Hadoop 3.0.1+ | Major | test |
| [HBASE-20386](https://issues.apache.org/jira/browse/HBASE-20386) | [DOC] Align WALPlayer help text and refguide | Minor | documentation |
| [HBASE-20365](https://issues.apache.org/jira/browse/HBASE-20365) | start branch-2.0 specific website section | Critical | documentation, website |
| [HBASE-14175](https://issues.apache.org/jira/browse/HBASE-14175) | Adopt releasedocmaker for better generated release notes | Critical | . |
| [HBASE-14348](https://issues.apache.org/jira/browse/HBASE-14348) | Update download mirror link | Major | documentation, website |
| [HBASE-20299](https://issues.apache.org/jira/browse/HBASE-20299) | Update MOB in hbase refguide | Minor | mob |
| [HBASE-20132](https://issues.apache.org/jira/browse/HBASE-20132) | Change the "KV" to "Cell" for web UI | Minor | . |
| [HBASE-20199](https://issues.apache.org/jira/browse/HBASE-20199) | Add test to prevent further permission regression around table flush and snapshot | Critical | test |
| [HBASE-20223](https://issues.apache.org/jira/browse/HBASE-20223) | Use hbase-thirdparty 2.1.0 | Blocker | dependencies |
| [HBASE-19158](https://issues.apache.org/jira/browse/HBASE-19158) | Ref guide needs upgrade update | Blocker | documentation |
| [HBASE-20212](https://issues.apache.org/jira/browse/HBASE-20212) | Make all Public classes have InterfaceAudience category | Critical | Usability |
| [HBASE-20246](https://issues.apache.org/jira/browse/HBASE-20246) | Remove the spark module | Blocker | . |
| [HBASE-19552](https://issues.apache.org/jira/browse/HBASE-19552) | update hbase to use new thirdparty libs | Major | dependencies, thirdparty |
| [HBASE-20171](https://issues.apache.org/jira/browse/HBASE-20171) | Remove o.a.h.h.ProcedureState | Minor | . |
| [HBASE-15151](https://issues.apache.org/jira/browse/HBASE-15151) | Rely on nightly tests for findbugs compliance on existing branch | Critical | build, test |
| [HBASE-20075](https://issues.apache.org/jira/browse/HBASE-20075) | remove logic for branch-1.1 nightly testing | Minor | test |
| [HBASE-20072](https://issues.apache.org/jira/browse/HBASE-20072) | remove 1.1 release line from the prerequisite tables | Major | community, documentation |
| [HBASE-18882](https://issues.apache.org/jira/browse/HBASE-18882) | [TEST] Run MR branch-1 jobs against hbase2 cluster | Critical | mapreduce, test |
| [HBASE-20093](https://issues.apache.org/jira/browse/HBASE-20093) | Replace ServerLoad by ServerMetrics for ServerManager | Major | . |
| [HBASE-20097](https://issues.apache.org/jira/browse/HBASE-20097) | Merge TableDescriptors#getAll and TableDescriptors#getAllDescriptors into one | Minor | . |
| [HBASE-20084](https://issues.apache.org/jira/browse/HBASE-20084) | Refactor the RSRpcServices#doBatchOp | Minor | regionserver |
| [HBASE-20092](https://issues.apache.org/jira/browse/HBASE-20092) | Fix TestRegionMetrics#testRegionMetrics | Minor | test |
| [HBASE-20088](https://issues.apache.org/jira/browse/HBASE-20088) | Update copyright notices to year 2018 | Minor | . |
| [HBASE-20089](https://issues.apache.org/jira/browse/HBASE-20089) | make\_rc.sh should name SHA-512 checksum files with the extension .sha512 | Minor | . |
| [HBASE-18596](https://issues.apache.org/jira/browse/HBASE-18596) | [TEST] A hbase1 cluster should be able to replicate to a hbase2 cluster; verify | Blocker | . |
| [HBASE-19947](https://issues.apache.org/jira/browse/HBASE-19947) | MR jobs using ITU use wrong filesystem | Critical | integration tests |
| [HBASE-19946](https://issues.apache.org/jira/browse/HBASE-19946) | TestPerColumnFamilyFlush and TestWalAndCompactingMemStoreFlush fail against h3 | Major | test |
| [HBASE-19922](https://issues.apache.org/jira/browse/HBASE-19922) | ProtobufUtils::PRIMITIVES is unused | Major | Protobufs |
| [HBASE-19720](https://issues.apache.org/jira/browse/HBASE-19720) | Rename WALKey#getTabnename to WALKey#getTableName | Major | . |
| [HBASE-15042](https://issues.apache.org/jira/browse/HBASE-15042) | refactor so that site materials are in the Standard Maven Place | Minor | build, website |
| [HBASE-19596](https://issues.apache.org/jira/browse/HBASE-19596) | RegionMetrics/ServerMetrics/ClusterMetrics should apply to all public classes | Critical | Client |
| [HBASE-19620](https://issues.apache.org/jira/browse/HBASE-19620) | Add UT to confirm the race in MasterRpcServices.getProcedureResult | Minor | proc-v2, test |
| [HBASE-19652](https://issues.apache.org/jira/browse/HBASE-19652) | Turn down CleanerChore logging; too chatty | Major | . |
| [HBASE-19644](https://issues.apache.org/jira/browse/HBASE-19644) | add the checkstyle rule to reject the illegal imports | Major | . |
| [HBASE-19637](https://issues.apache.org/jira/browse/HBASE-19637) | Add .checkstyle to gitignore | Major | build |
| [HBASE-19550](https://issues.apache.org/jira/browse/HBASE-19550) | Wrap the cell passed via Mutation#add(Cell) to be of ExtendedCell | Major | . |
| [HBASE-18970](https://issues.apache.org/jira/browse/HBASE-18970) | The version of jruby we use now can't get interactive input from prompt | Critical | shell |
| [HBASE-19548](https://issues.apache.org/jira/browse/HBASE-19548) | Backport the missed doc fix from master to branch-2 | Major | . |
| [HBASE-19526](https://issues.apache.org/jira/browse/HBASE-19526) | Update hadoop version to 3.0 GA | Major | build, dependencies |
| [HBASE-19477](https://issues.apache.org/jira/browse/HBASE-19477) | Move and align documentation in hbase-annotations | Trivial | . |
| [HBASE-19267](https://issues.apache.org/jira/browse/HBASE-19267) | Eclipse project import issues on 2.0 | Major | build |
| [HBASE-19512](https://issues.apache.org/jira/browse/HBASE-19512) | Move EventType and ExecutorType from hbase-client to hbase-server | Major | regionserver |
| [HBASE-19485](https://issues.apache.org/jira/browse/HBASE-19485) | Minor improvement to TestCompactedHFilesDischarger | Trivial | . |
| [HBASE-18988](https://issues.apache.org/jira/browse/HBASE-18988) | Add release managers to reference guide | Trivial | documentation |
| [HBASE-19410](https://issues.apache.org/jira/browse/HBASE-19410) | Move zookeeper related UTs to hbase-zookeeper and mark them as ZKTests | Major | test, Zookeeper |
| [HBASE-19323](https://issues.apache.org/jira/browse/HBASE-19323) | Make netty engine default in hbase2 | Major | rpc |
| [HBASE-19416](https://issues.apache.org/jira/browse/HBASE-19416) | Document dynamic configurations currently support | Minor | documentation |
| [HBASE-19298](https://issues.apache.org/jira/browse/HBASE-19298) | CellScanner and CellScannable should be declared as IA.Public | Major | . |
| [HBASE-19408](https://issues.apache.org/jira/browse/HBASE-19408) | Remove WALActionsListener.Base | Trivial | . |
| [HBASE-19407](https://issues.apache.org/jira/browse/HBASE-19407) | [branch-2] Remove backup/restore | Blocker | . |
| [HBASE-19328](https://issues.apache.org/jira/browse/HBASE-19328) | Remove asked if splittable log messages | Minor | proc-v2 |
| [HBASE-19200](https://issues.apache.org/jira/browse/HBASE-19200) | make hbase-client only depend on ZKAsyncRegistry and ZNodePaths | Major | Client, Zookeeper |
| [HBASE-19123](https://issues.apache.org/jira/browse/HBASE-19123) | Purge 'complete' support from Coprocesor Observers | Major | Coprocessors |
| [HBASE-19241](https://issues.apache.org/jira/browse/HBASE-19241) | Improve javadoc for AsyncAdmin and cleanup warnings for the implementation classes | Major | documentation |
| [HBASE-14350](https://issues.apache.org/jira/browse/HBASE-14350) | Procedure V2 Phase 2: Assignment Manager | Blocker | master, proc-v2 |
| [HBASE-19224](https://issues.apache.org/jira/browse/HBASE-19224) | LICENSE failure for Hadoop 3.1 on dnsjava | Major | build |
| [HBASE-18817](https://issues.apache.org/jira/browse/HBASE-18817) | Pull hbase-spark module out of branch-2 | Blocker | spark |
| [HBASE-19217](https://issues.apache.org/jira/browse/HBASE-19217) | Update supplemental-models.xml for jetty-sslengine | Major | . |
| [HBASE-19179](https://issues.apache.org/jira/browse/HBASE-19179) | Remove hbase-prefix-tree | Critical | . |
| [HBASE-19176](https://issues.apache.org/jira/browse/HBASE-19176) | Remove hbase-native-client from branch-2 | Major | . |
| [HBASE-19097](https://issues.apache.org/jira/browse/HBASE-19097) | update testing to use Apache Yetus Test Patch version 0.6.0 | Major | build |
| [HBASE-19049](https://issues.apache.org/jira/browse/HBASE-19049) | Update kerby to 1.0.1 GA release | Major | dependencies |
| [HBASE-16338](https://issues.apache.org/jira/browse/HBASE-16338) | update jackson to 2.y | Major | dependencies |
| [HBASE-19007](https://issues.apache.org/jira/browse/HBASE-19007) | Align Services Interfaces in Master and RegionServer | Blocker | . |
| [HBASE-19043](https://issues.apache.org/jira/browse/HBASE-19043) | Purge TableWrapper and CoprocessorHConnnection | Major | Coprocessors |
| [HBASE-18991](https://issues.apache.org/jira/browse/HBASE-18991) | Remove RegionMergeRequest | Trivial | . |
| [HBASE-18927](https://issues.apache.org/jira/browse/HBASE-18927) | Add the DataType which is subset of KeyValue#Type to CellBuilder for building cell | Major | . |
| [HBASE-18833](https://issues.apache.org/jira/browse/HBASE-18833) | Ensure precommit personality is up to date on all active branches | Critical | test |
| [HBASE-10504](https://issues.apache.org/jira/browse/HBASE-10504) | Define Replication Interface | Blocker | Replication |
| [HBASE-18767](https://issues.apache.org/jira/browse/HBASE-18767) | Release hbase-2.0.0-alpha-3; Theme "Scrubbed API" | Major | . |
| [HBASE-18835](https://issues.apache.org/jira/browse/HBASE-18835) | The return type of ExtendedCell#deepClone should be ExtendedCell rather than Cell | Major | . |
| [HBASE-18766](https://issues.apache.org/jira/browse/HBASE-18766) | Make TableSnapshotScanner Audience Private | Major | . |
| [HBASE-18782](https://issues.apache.org/jira/browse/HBASE-18782) | Module untangling work | Major | . |
| [HBASE-18421](https://issues.apache.org/jira/browse/HBASE-18421) | update hadoop prerequisites docs to call out 2.8.1 | Major | community, dependencies, documentation |
| [HBASE-13868](https://issues.apache.org/jira/browse/HBASE-13868) | Correct "Disable automatic splitting" section in HBase book | Trivial | documentation |
| [HBASE-17972](https://issues.apache.org/jira/browse/HBASE-17972) | Remove mergePool from CompactSplitThread | Minor | regionserver |
| [HBASE-18768](https://issues.apache.org/jira/browse/HBASE-18768) | Move TestTableName to hbase-common from hbase-server | Major | . |
| [HBASE-17967](https://issues.apache.org/jira/browse/HBASE-17967) | clean up documentation references to -ROOT- table. | Minor | documentation |
| [HBASE-18710](https://issues.apache.org/jira/browse/HBASE-18710) | Move on to hbase-thirdparty 1.0.1 (it was just released). | Major | hbase-thirdparty |
| [HBASE-18705](https://issues.apache.org/jira/browse/HBASE-18705) | bin/hbase does not find cached\_classpath.txt | Major | . |
| [HBASE-18611](https://issues.apache.org/jira/browse/HBASE-18611) | Copy all tests from o.a.h.h.p.TestProtobufUtil to o.a.h.h.s.p.TestProtobufUtil | Minor | Protobufs, test |
| [HBASE-18670](https://issues.apache.org/jira/browse/HBASE-18670) | Add .DS\_Store to .gitignore | Minor | community |
| [HBASE-17614](https://issues.apache.org/jira/browse/HBASE-17614) | Move Backup/Restore into separate module | Blocker | . |
| [HBASE-18660](https://issues.apache.org/jira/browse/HBASE-18660) | Remove duplicate code from the checkAndPut method in HTable | Trivial | . |
| [HBASE-18653](https://issues.apache.org/jira/browse/HBASE-18653) | Undo hbase2 check against \< hadoop2.6.x; i.e. implement agreed drop of hadoop 2.4 and 2.5 support in hbase2 | Major | build |
| [HBASE-18630](https://issues.apache.org/jira/browse/HBASE-18630) | Prune dependencies; as is branch-2 has duplicates | Major | dependencies |
| [HBASE-18594](https://issues.apache.org/jira/browse/HBASE-18594) | Release hbase-2.0.0-alpha2 | Major | . |
| [HBASE-18623](https://issues.apache.org/jira/browse/HBASE-18623) | Frequent failed to parse at EOF warnings from WALEntryStream | Minor | . |
| [HBASE-18518](https://issues.apache.org/jira/browse/HBASE-18518) | Remove jersey1\* dependencies from project and jersey1\* jars from lib dir | Major | dependencies, pom, REST |
| [HBASE-18544](https://issues.apache.org/jira/browse/HBASE-18544) | Move the HRegion#addRegionToMETA to TestDefaultMemStore | Minor | regionserver |
| [HBASE-18582](https://issues.apache.org/jira/browse/HBASE-18582) | Correct the docs for Mutation#setCellVisibility | Minor | documentation |
| [HBASE-18588](https://issues.apache.org/jira/browse/HBASE-18588) | Verify we're using netty .so epolling on linux post HBASE-18271 | Major | test |
| [HBASE-18514](https://issues.apache.org/jira/browse/HBASE-18514) | Backport space quota "phase2" work to branch-2 | Blocker | . |
| [HBASE-18527](https://issues.apache.org/jira/browse/HBASE-18527) | update nightly builds to compensate for jenkins plugin upgrades | Blocker | community, test |
| [HBASE-18515](https://issues.apache.org/jira/browse/HBASE-18515) | Introduce Delete.add as a replacement for Delete#addDeleteMarker | Major | Client |
| [HBASE-16100](https://issues.apache.org/jira/browse/HBASE-16100) | Procedure V2 - Tools | Minor | proc-v2, tooling |
| [HBASE-15141](https://issues.apache.org/jira/browse/HBASE-15141) | Procedure V2 - Web UI | Blocker | proc-v2, UI |
| [HBASE-18465](https://issues.apache.org/jira/browse/HBASE-18465) | [AMv2] remove old split region code that is no longer needed | Major | Admin, rpc |
| [HBASE-16728](https://issues.apache.org/jira/browse/HBASE-16728) | Add hadoop.profile=3.0 pass to precommit checks. | Major | build, hadoop3 |
| [HBASE-18384](https://issues.apache.org/jira/browse/HBASE-18384) | Add link to refguide schema section on apache blog on hbase application archetypes | Minor | documentation |
| [HBASE-18344](https://issues.apache.org/jira/browse/HBASE-18344) | Introduce Append.addColumn as a replacement for Append.add | Trivial | . |
| [HBASE-18364](https://issues.apache.org/jira/browse/HBASE-18364) | Downgrade surefire | Major | . |
| [HBASE-18291](https://issues.apache.org/jira/browse/HBASE-18291) | Regenerate thrift2 python examples | Minor | . |
| [HBASE-18288](https://issues.apache.org/jira/browse/HBASE-18288) | Declared dependency on specific javax.ws.rs | Major | dependencies, REST |
| [HBASE-18284](https://issues.apache.org/jira/browse/HBASE-18284) | Update hbasecon asia logo on home page of hbase.apache.org | Major | . |
| [HBASE-12794](https://issues.apache.org/jira/browse/HBASE-12794) | Guidelines for filing JIRA issues | Major | documentation |
| [HBASE-18258](https://issues.apache.org/jira/browse/HBASE-18258) | Take down hbasecon2017 logo from hbase.apache.org and put up hbaseconasia2017 instead. | Major | . |
| [HBASE-17954](https://issues.apache.org/jira/browse/HBASE-17954) | Switch findbugs implementation to spotbugs | Major | build, community, test |
| [HBASE-17898](https://issues.apache.org/jira/browse/HBASE-17898) | Update dependencies | Critical | . |
| [HBASE-18187](https://issues.apache.org/jira/browse/HBASE-18187) | Release hbase-2.0.0-alpha1 | Major | . |
| [HBASE-18096](https://issues.apache.org/jira/browse/HBASE-18096) | Limit HFileUtil visibility and add missing annotations | Trivial | . |
| [HBASE-13074](https://issues.apache.org/jira/browse/HBASE-13074) | Cleaned up usage of hbase.master.lease.thread.wakefrequency | Trivial | wal |
| [HBASE-17968](https://issues.apache.org/jira/browse/HBASE-17968) | Update copyright year in NOTICE file | Trivial | build |
| [HBASE-17965](https://issues.apache.org/jira/browse/HBASE-17965) | Canary tool should print the regionserver name on failure | Minor | . |
| [HBASE-17828](https://issues.apache.org/jira/browse/HBASE-17828) | Revisit the IS annotation and the documentation | Critical | API |
| [HBASE-16215](https://issues.apache.org/jira/browse/HBASE-16215) | clean up references for EOM release lines | Major | community, website |
| [HBASE-17847](https://issues.apache.org/jira/browse/HBASE-17847) | update documentation to include positions on recent Hadoop releases | Critical | community, documentation |
| [HBASE-17834](https://issues.apache.org/jira/browse/HBASE-17834) | close stale github PRs | Minor | community |
| [HBASE-17802](https://issues.apache.org/jira/browse/HBASE-17802) | Add note that minor versions can add methods to Interfaces | Major | documentation |
| [HBASE-17782](https://issues.apache.org/jira/browse/HBASE-17782) | Extend IdReadWriteLock to support using both weak and soft reference | Major | . |
| [HBASE-17618](https://issues.apache.org/jira/browse/HBASE-17618) | Refactor the implementation of modify table and delete column in MOB | Major | mob |
| [HBASE-17609](https://issues.apache.org/jira/browse/HBASE-17609) | Allow for region merging in the UI | Major | . |
| [HBASE-16812](https://issues.apache.org/jira/browse/HBASE-16812) | Clean up the locks in MOB | Minor | mob |
| [HBASE-17502](https://issues.apache.org/jira/browse/HBASE-17502) | Document hadoop pre-2.6.1 and Java 1.8 Kerberos problem in our hadoop support matrix | Major | . |
| [HBASE-16710](https://issues.apache.org/jira/browse/HBASE-16710) | Add ZStandard Codec to Compression.java | Minor | . |
| [HBASE-17401](https://issues.apache.org/jira/browse/HBASE-17401) | Remove unnecessary semicolons in hbase-annotations | Trivial | . |
| [HBASE-17397](https://issues.apache.org/jira/browse/HBASE-17397) | AggregationClient cleanup | Minor | . |
| [HBASE-16869](https://issues.apache.org/jira/browse/HBASE-16869) | Typo in "Disabling Blockcache" doc | Trivial | documentation |
| [HBASE-17272](https://issues.apache.org/jira/browse/HBASE-17272) | Doc how to run Standalone HBase over an HDFS instance; all daemons in one JVM but persisting to an HDFS instance | Major | documentation |
| [HBASE-17121](https://issues.apache.org/jira/browse/HBASE-17121) | Undo the building of xref as part of site build | Major | . |
| [HBASE-16335](https://issues.apache.org/jira/browse/HBASE-16335) | update to latest apache parent pom | Major | build, dependencies |
| [HBASE-17046](https://issues.apache.org/jira/browse/HBASE-17046) | Add 1.1 doc to hbase.apache.org | Major | website |
| [HBASE-16955](https://issues.apache.org/jira/browse/HBASE-16955) | Fixup precommit protoc check to do new distributed protos and pb 3.1.0 build | Major | build, Protobufs |
| [HBASE-16413](https://issues.apache.org/jira/browse/HBASE-16413) | Add apache-hbase.slack.com #users channel to ref guide | Minor | documentation |
| [HBASE-16952](https://issues.apache.org/jira/browse/HBASE-16952) | Replace hadoop-maven-plugins with protobuf-maven-plugin for building protos | Major | build |
| [HBASE-16811](https://issues.apache.org/jira/browse/HBASE-16811) | Remove mob sweep job | Minor | . |
| [HBASE-16591](https://issues.apache.org/jira/browse/HBASE-16591) | Add a docker file only contains java 8 for running pre commit on master | Blocker | build |
| [HBASE-16518](https://issues.apache.org/jira/browse/HBASE-16518) | Remove old .arcconfig file | Trivial | tooling |
| [HBASE-16376](https://issues.apache.org/jira/browse/HBASE-16376) | Document implicit side-effects on partial results when calling Scan#setBatch(int) | Minor | API, documentation |
| [HBASE-16467](https://issues.apache.org/jira/browse/HBASE-16467) | Move AbstractHBaseTool to hbase-common | Trivial | . |
| [HBASE-16260](https://issues.apache.org/jira/browse/HBASE-16260) | Audit dependencies for Category-X | Critical | community, dependencies |
| [HBASE-16426](https://issues.apache.org/jira/browse/HBASE-16426) | Remove company affiliations from committer list | Major | documentation, website |
| [HBASE-16354](https://issues.apache.org/jira/browse/HBASE-16354) | Clean up defunct GitHub PRs | Major | community |
| [HBASE-15656](https://issues.apache.org/jira/browse/HBASE-15656) | Fix unused protobuf warning in Admin.proto | Minor | . |
| [HBASE-16073](https://issues.apache.org/jira/browse/HBASE-16073) | update compatibility\_checker for jacc dropping comma sep args | Critical | build, documentation |
| [HBASE-15989](https://issues.apache.org/jira/browse/HBASE-15989) | Remove hbase.online.schema.update.enable | Major | . |
| [HBASE-15888](https://issues.apache.org/jira/browse/HBASE-15888) | Extend HBASE-12769 for bulk load data replication | Major | Replication |
| [HBASE-15895](https://issues.apache.org/jira/browse/HBASE-15895) | remove unmaintained jenkins build analysis tool. | Minor | build |
| [HBASE-14635](https://issues.apache.org/jira/browse/HBASE-14635) | Fix flaky test TestSnapshotCloneIndependence | Major | test |
| [HBASE-4368](https://issues.apache.org/jira/browse/HBASE-4368) | Expose processlist in shell (per regionserver and perhaps by cluster) | Major | shell |
| [HBASE-15646](https://issues.apache.org/jira/browse/HBASE-15646) | Add some docs about exporting and importing snapshots using S3 | Major | documentation, snapshots |
| [HBASE-15729](https://issues.apache.org/jira/browse/HBASE-15729) | Remove old JDiff wrapper scripts in dev-support | Minor | build, community |
| [HBASE-15644](https://issues.apache.org/jira/browse/HBASE-15644) | Add maven-scala-plugin for scaladoc | Major | build |
| [HBASE-15494](https://issues.apache.org/jira/browse/HBASE-15494) | Close obviated PRs on github | Major | community |
| [HBASE-14678](https://issues.apache.org/jira/browse/HBASE-14678) | Experiment: Temporarily disable balancer and a few others to see if root of crashed/timedout JVMs | Critical | test |
| [HBASE-15502](https://issues.apache.org/jira/browse/HBASE-15502) | Skeleton unit test to copy/paste | Major | documentation |
| [HBASE-15220](https://issues.apache.org/jira/browse/HBASE-15220) | Change two logs in SimpleRegionNormalizer to INFO level | Minor | . |
| [HBASE-15017](https://issues.apache.org/jira/browse/HBASE-15017) | Close out GitHub pull requests that aren't likely to update into a usable patch | Trivial | community |
| [HBASE-14526](https://issues.apache.org/jira/browse/HBASE-14526) | Remove delayed rpc | Major | . |
| [HBASE-15099](https://issues.apache.org/jira/browse/HBASE-15099) | Move RegionStateListener class out of quotas package | Minor | . |
| [HBASE-15007](https://issues.apache.org/jira/browse/HBASE-15007) | update Hadoop support matrix to list 2.6.1+ as supported | Major | documentation, Operability |
| [HBASE-15003](https://issues.apache.org/jira/browse/HBASE-15003) | Remove BoundedConcurrentLinkedQueue and associated test | Minor | util |
| [HBASE-11985](https://issues.apache.org/jira/browse/HBASE-11985) | Document sizing rules of thumb | Major | documentation |
| [HBASE-14994](https://issues.apache.org/jira/browse/HBASE-14994) | Clean up some broken links and references to old APIs | Major | documentation |
| [HBASE-14534](https://issues.apache.org/jira/browse/HBASE-14534) | Bump yammer/coda/dropwizard metrics dependency version | Minor | . |
| [HBASE-14851](https://issues.apache.org/jira/browse/HBASE-14851) | Add test showing how to use TTL from thrift | Major | test, Thrift |
| [HBASE-14516](https://issues.apache.org/jira/browse/HBASE-14516) | categorize hadoop-compat tests | Critical | build, hadoop2, test |
| [HBASE-14308](https://issues.apache.org/jira/browse/HBASE-14308) | HTableDescriptor WARN is not actionable | Minor | Usability |
| [HBASE-14732](https://issues.apache.org/jira/browse/HBASE-14732) | Update HBase website skin and CSS | Major | documentation |
| [HBASE-14764](https://issues.apache.org/jira/browse/HBASE-14764) | Stop using post-site target | Major | documentation |
| [HBASE-14713](https://issues.apache.org/jira/browse/HBASE-14713) | Remove simple deprecated-since-1.0 code in hbase-server from hbase 2.0 | Major | . |
| [HBASE-14762](https://issues.apache.org/jira/browse/HBASE-14762) | Update docs about publishing website to show gitsubpub method instead of svnsubpub | Critical | documentation |
| [HBASE-14481](https://issues.apache.org/jira/browse/HBASE-14481) | Decommission HBase wiki | Blocker | documentation |
| [HBASE-11720](https://issues.apache.org/jira/browse/HBASE-11720) | Set up jenkins job to build site documentation | Minor | build, documentation |
| [HBASE-14026](https://issues.apache.org/jira/browse/HBASE-14026) | Clarify "Web API" in version and compatibility docs | Critical | documentation |
| [HBASE-13867](https://issues.apache.org/jira/browse/HBASE-13867) | Add endpoint coprocessor guide to HBase book | Major | Coprocessors, documentation |
| [HBASE-14652](https://issues.apache.org/jira/browse/HBASE-14652) | Improve / update publish-website script in dev-support | Major | scripts |
| [HBASE-14493](https://issues.apache.org/jira/browse/HBASE-14493) | Upgrade the jamon-runtime dependency | Minor | . |
| [HBASE-14502](https://issues.apache.org/jira/browse/HBASE-14502) | Purge use of jmock and remove as dependency | Major | test |
| [HBASE-14271](https://issues.apache.org/jira/browse/HBASE-14271) | Improve Nexus staging instructions | Minor | build, documentation |
| [HBASE-14424](https://issues.apache.org/jira/browse/HBASE-14424) | Document that DisabledRegionSplitPolicy blocks manual splits | Minor | documentation |
| [HBASE-14482](https://issues.apache.org/jira/browse/HBASE-14482) | Add hadoop 2.6.1 to the test-patch build list | Minor | build |
| [HBASE-14227](https://issues.apache.org/jira/browse/HBASE-14227) | Fold special cased MOB APIs into existing APIs | Blocker | mob |
| [HBASE-14361](https://issues.apache.org/jira/browse/HBASE-14361) | ReplicationSink should create Connection instances lazily | Major | Replication |
| [HBASE-14253](https://issues.apache.org/jira/browse/HBASE-14253) | update docs + build for maven 3.0.4+ | Major | build, documentation |
| [HBASE-14318](https://issues.apache.org/jira/browse/HBASE-14318) | make\_rc.sh should purge/re-resolve dependencies from local repository | Major | build |
| [HBASE-14290](https://issues.apache.org/jira/browse/HBASE-14290) | Spin up less threads in tests | Major | test |
| [HBASE-14091](https://issues.apache.org/jira/browse/HBASE-14091) | Update site documentation with code of conduct and project policy for transgressions | Major | documentation, website |
| [HBASE-14288](https://issues.apache.org/jira/browse/HBASE-14288) | Upgrade asciidoctor plugin to v1.5.2.1 | Minor | build |
| [HBASE-14085](https://issues.apache.org/jira/browse/HBASE-14085) | Correct LICENSE and NOTICE files in artifacts | Blocker | build |
| [HBASE-13089](https://issues.apache.org/jira/browse/HBASE-13089) | Fix test compilation error on building against htrace-3.2.0-incubating | Minor | . |
| [HBASE-14081](https://issues.apache.org/jira/browse/HBASE-14081) | (outdated) references to SVN/trunk in documentation | Minor | documentation, website |
| [HBASE-14071](https://issues.apache.org/jira/browse/HBASE-14071) | Document troubleshooting unexpected filesystem usage by snapshots and WALs | Major | . |
| [HBASE-13446](https://issues.apache.org/jira/browse/HBASE-13446) | Add docs warning about missing data for downstream on versions prior to HBASE-13262 | Critical | documentation |
| [HBASE-14057](https://issues.apache.org/jira/browse/HBASE-14057) | HBase shell user\_permission should list super users defined on hbase-site.xml | Minor | shell |
| [HBASE-11276](https://issues.apache.org/jira/browse/HBASE-11276) | Add back support for running ChaosMonkey as standalone tool | Minor | . |
| [HBASE-14052](https://issues.apache.org/jira/browse/HBASE-14052) | Mark a few methods in CellUtil audience private since only make sense internally to hbase | Trivial | API |
| [HBASE-14053](https://issues.apache.org/jira/browse/HBASE-14053) | Disable DLR in branch-1+ | Major | Recovery |
| [HBASE-13869](https://issues.apache.org/jira/browse/HBASE-13869) | Fix typo in HBase book | Trivial | documentation |
| [HBASE-13964](https://issues.apache.org/jira/browse/HBASE-13964) | Skip region normalization for tables under namespace quota | Major | Balancer, Usability |
| [HBASE-13948](https://issues.apache.org/jira/browse/HBASE-13948) | Expand hadoop2 versions built on the pre-commit | Major | build |
| [HBASE-13956](https://issues.apache.org/jira/browse/HBASE-13956) | Add myself as 1.1 release manager | Trivial | website |
| [HBASE-13915](https://issues.apache.org/jira/browse/HBASE-13915) | Remove EOL HBase versions from java and hadoop prereq tables | Major | documentation |
| [HBASE-13929](https://issues.apache.org/jira/browse/HBASE-13929) | make\_rc.sh publishes empty shaded artifacts | Minor | build |
| [HBASE-13666](https://issues.apache.org/jira/browse/HBASE-13666) | book.pdf is not renamed during site build | Major | website |
| [HBASE-13660](https://issues.apache.org/jira/browse/HBASE-13660) | Add link to cloud bigtable schema modeling guide into our refguide | Major | documentation |
| [HBASE-13799](https://issues.apache.org/jira/browse/HBASE-13799) | javadoc how Scan gets polluted when used; if you set attributes or ask for scan metrics | Minor | documentation |
| [HBASE-13726](https://issues.apache.org/jira/browse/HBASE-13726) | stop using Hadoop's IOUtils | Major | dependencies |
| [HBASE-13716](https://issues.apache.org/jira/browse/HBASE-13716) | Stop using Hadoop's FSConstants | Blocker | Filesystem Integration |
| [HBASE-13582](https://issues.apache.org/jira/browse/HBASE-13582) | Update docs for HTrace | Minor | documentation |
| [HBASE-13713](https://issues.apache.org/jira/browse/HBASE-13713) | See about dropping ClassLoaderBase#getClassLoadingLock | Minor | . |
| [HBASE-13586](https://issues.apache.org/jira/browse/HBASE-13586) | Update book on Hadoop and Java supported versions for 1.1.x | Major | documentation |
| [HBASE-11677](https://issues.apache.org/jira/browse/HBASE-11677) | Make Logger instance modifiers consistent | Minor | util |
| [HBASE-13554](https://issues.apache.org/jira/browse/HBASE-13554) | Update book clarifying API stability guarantees | Major | documentation |
| [HBASE-13487](https://issues.apache.org/jira/browse/HBASE-13487) | Doc KEEP\_DELETED\_CELLS | Major | documentation |
| [HBASE-13187](https://issues.apache.org/jira/browse/HBASE-13187) | Add ITBLL that exercises per CF flush | Critical | integration tests |
| [HBASE-13361](https://issues.apache.org/jira/browse/HBASE-13361) | Remove or undeprecate {get\|set}ScannerCaching in HTable | Minor | Client |
| [HBASE-13310](https://issues.apache.org/jira/browse/HBASE-13310) | Fix high priority findbugs warnings | Major | . |
| [HBASE-13257](https://issues.apache.org/jira/browse/HBASE-13257) | Show coverage report on jenkins | Minor | . |
| [HBASE-13233](https://issues.apache.org/jira/browse/HBASE-13233) | add hbase-11339 branch to the patch testing script | Minor | . |
| [HBASE-13237](https://issues.apache.org/jira/browse/HBASE-13237) | Improve trademark marks on the hbase.apache.org homepage | Minor | documentation |
| [HBASE-13234](https://issues.apache.org/jira/browse/HBASE-13234) | Improve the obviousness of the download link on hbase.apache.org | Minor | documentation |
| [HBASE-7126](https://issues.apache.org/jira/browse/HBASE-7126) | Update website with info on how to report security bugs | Critical | documentation |
| [HBASE-12466](https://issues.apache.org/jira/browse/HBASE-12466) | Document visibility scan label generator usage and behavior | Major | documentation, security |
| [HBASE-13177](https://issues.apache.org/jira/browse/HBASE-13177) | Document HBASE-13012 | Major | documentation, mob |
| [HBASE-11670](https://issues.apache.org/jira/browse/HBASE-11670) | Build PDF of Ref Guide | Minor | documentation |
| [HBASE-12180](https://issues.apache.org/jira/browse/HBASE-12180) | Fix and reenable TestRegionReplicaReplicationEndpoint | Major | test |
| [HBASE-12995](https://issues.apache.org/jira/browse/HBASE-12995) | Document that HConnection#getTable methods do not check table existence since 0.98.1 | Trivial | . |
| [HBASE-13079](https://issues.apache.org/jira/browse/HBASE-13079) | Add an admonition to Scans example that the results scanner should be closed | Major | documentation |
| [HBASE-12168](https://issues.apache.org/jira/browse/HBASE-12168) | Document Rest gateway SPNEGO-based authentication for client | Major | documentation, REST, security |
| [HBASE-12701](https://issues.apache.org/jira/browse/HBASE-12701) | Document how to set the split policy on a given table | Major | documentation |
| [HBASE-12783](https://issues.apache.org/jira/browse/HBASE-12783) | Create efficient RegionLocator implementation | Major | . |
| [HBASE-12785](https://issues.apache.org/jira/browse/HBASE-12785) | Use FutureTask to timeout the attempt to get the lock for hbck | Minor | . |
| [HBASE-12623](https://issues.apache.org/jira/browse/HBASE-12623) | Remove pre-0.96 to 0.96 upgrade code | Major | . |
| [HBASE-12589](https://issues.apache.org/jira/browse/HBASE-12589) | Forward-port fix for TestFromClientSideWithCoprocessor.testMaxKeyValueSize | Major | test |
| [HBASE-12515](https://issues.apache.org/jira/browse/HBASE-12515) | update test-patch to use git | Minor | build |
| [HBASE-12438](https://issues.apache.org/jira/browse/HBASE-12438) | Add -Dsurefire.rerunFailingTestsCount=2 to patch build runs so flakies get rerun | Major | test |
| [HBASE-12362](https://issues.apache.org/jira/browse/HBASE-12362) | Interim documentation of important master and regionserver metrics | Major | documentation |
| [HBASE-12239](https://issues.apache.org/jira/browse/HBASE-12239) | Document hedged reads | Major | documentation |
| [HBASE-11791](https://issues.apache.org/jira/browse/HBASE-11791) | Update docs on visibility tags and ACLs, transparent encryption, secure bulk upload | Major | documentation |
| [HBASE-11961](https://issues.apache.org/jira/browse/HBASE-11961) | Document region state transitions | Minor | . |
| [HBASE-11619](https://issues.apache.org/jira/browse/HBASE-11619) | Remove unused test class from TestHLogSplit | Trivial | wal |
| [HBASE-4593](https://issues.apache.org/jira/browse/HBASE-4593) | Design and document the official procedure for posting patches, commits, commit messages, etc. to smooth process and make integration with tools easier | Major | documentation |
| [HBASE-11729](https://issues.apache.org/jira/browse/HBASE-11729) | Document HFile v3 | Trivial | documentation, HFile |
| [HBASE-11606](https://issues.apache.org/jira/browse/HBASE-11606) | Enable ZK-less region assignment by default | Minor | . |
| [HBASE-10398](https://issues.apache.org/jira/browse/HBASE-10398) | HBase book updates for Replication after HBASE-10322 | Major | documentation |
| [HBASE-11459](https://issues.apache.org/jira/browse/HBASE-11459) | Add more doc on compression codecs, how to hook up native lib, lz4, etc. | Minor | documentation |
| [HBASE-8450](https://issues.apache.org/jira/browse/HBASE-8450) | Update hbase-default.xml and general recommendations to better suit current hw, h2, experience, etc. | Critical | Usability |
> NOTE: Below pre-2.0.0 changes were generated otherwise. Imported as-is, unaltered.
```
Release Notes - HBase - Version 1.0.0 02/20/2015
** Sub-task
* [HBASE-11852] - Still see "UnsupportedOperationException: CollectionUsage threshold is not supported"
* [HBASE-12485] - Maintain SeqId monotonically increasing
* [HBASE-12511] - namespace permissions - add support from table creation privilege in a namespace 'C'
* [HBASE-12568] - Adopt Semantic Versioning and document it in the book
* [HBASE-12575] - Sanity check table coprocessor classes are loadable
* [HBASE-12606] - Sanity check encryption configuration before opening WAL or onlining regions
* [HBASE-12679] - Add HBaseInterfaceAudience.TOOLS and move some of the Public classes to LimitedPrivate
* [HBASE-12704] - Add demo client which uses doAs functionality on Thrift-over-HTTPS.
* [HBASE-12730] - Backport HBASE-5162 (Basic client pushback mechanism) to branch-1
* [HBASE-12735] - Refactor TAG so it can live as unit test and as an integration test
* [HBASE-12763] - Make it so there must be WALs for a server to be marked dead
* [HBASE-12776] - SpliTransaction: Log number of files to be split
* [HBASE-12779] - SplitTransaction: Add metrics
* [HBASE-12793] - [hbck] closeRegionSilentlyAndWait() should log cause of IOException and retry until hbase.hbck.close.timeout expires
* [HBASE-12802] - Remove unnecessary Table.flushCommits()
* [HBASE-12926] - Backport HBASE-12688 (Update site with a bootstrap-based UI) for HBASE-12918
* [HBASE-12980] - Delete of a table may not clean all rows from hbase:meta
** Bug
* [HBASE-8026] - HBase Shell docs for scan command does not reference VERSIONS
* [HBASE-9431] - Set 'hbase.bulkload.retries.number' to 10 as HBASE-8450 claims
* [HBASE-9910] - TestHFilePerformance and HFilePerformanceEvaluation should be merged in a single HFile performance test class.
* [HBASE-10499] - In write heavy scenario one of the regions does not get flushed causing RegionTooBusyException
* [HBASE-10528] - DefaultBalancer selects plans to move regions onto draining nodes
* [HBASE-11979] - Compaction progress reporting is wrong
* [HBASE-12028] - Abort the RegionServer, when it's handler threads die
* [HBASE-12070] - Add an option to hbck to fix ZK inconsistencies
* [HBASE-12108] - HBaseConfiguration: set classloader before loading xml files
* [HBASE-12267] - Replace HTable constructor in mapreduce.* classes with ConnectionFactory
* [HBASE-12270] - A bug in the bucket cache, with cache blocks on write enabled
* [HBASE-12339] - WAL performance evaluation tool doesn't roll logs
* [HBASE-12348] - preModifyColumn and preDeleteColumn in AC denies user to perform its operation though it has required rights
* [HBASE-12393] - The regionserver web will throw exception if we disable block cache
* [HBASE-12422] - Use ConnectionFactory in HTable constructors
* [HBASE-12431] - Use of getColumnLatestCell(byte[], int, int, byte[], int, int) is Not Thread Safe
* [HBASE-12454] - Setting didPerformCompaction early in HRegion#compact
* [HBASE-12467] - Master joins cluster but never completes initialization
* [HBASE-12480] - Regions in FAILED_OPEN/FAILED_CLOSE should be processed on master failover
* [HBASE-12564] - consolidate the getTableDescriptors() semantic
* [HBASE-12565] - Race condition in HRegion.batchMutate() causes partial data to be written when region closes
* [HBASE-12574] - Update replication metrics to not do so many map look ups.
* [HBASE-12585] - Fix refguide so it does hbase 1.0 style API everywhere with callout on how we used to do it in pre-1.0
* [HBASE-12607] - TestHBaseFsck#testParallelHbck fails running against hadoop 2.6.0
* [HBASE-12611] - Create autoCommit() method and remove clearBufferOnFail
* [HBASE-12617] - Running IntegrationTestBigLinkedList against cluster getting not an instance of org.apache.hadoop.hbase.MiniHBaseCluster
* [HBASE-12618] - Add 'Namespace' to headers while displaying user permissions.
* [HBASE-12622] - user_permission should require global admin to display global and ns permissions
* [HBASE-12632] - ThrottledInputStream/ExportSnapshot does not throttle
* [HBASE-12634] - Fix the AccessController#requireGlobalPermission(ns) with NS
* [HBASE-12635] - Delete acl notify znode of table after the table is deleted
* [HBASE-12637] - Compilation with Hadoop-2.4- is broken
* [HBASE-12642] - LoadIncrementalHFiles does not throw exception after hitting hbase.bulkload.retries.number setting
* [HBASE-12644] - Visibility Labels: issue with storing super users in labels table
* [HBASE-12647] - Truncate table should work with C as well
* [HBASE-12652] - Allow unmanaged connections in MetaTableAccessor
* [HBASE-12655] - WALPerformanceEvaluation miscalculates append/sync statistics for multiple regions
* [HBASE-12661] - rat check fails for several files
* [HBASE-12662] - region_status.rb is failing with NoMethodError
* [HBASE-12663] - unify getTableDescriptors() and listTableDescriptorsByNamespace()
* [HBASE-12664] - TestDefaultLoadBalancer.testBalanceCluster fails in CachedDNSToSwitchMapping
* [HBASE-12665] - When aborting, dump metrics
* [HBASE-12666] - TestAssignmentManager hanging; add timeouts
* [HBASE-12671] - HBASE-12652 broke branch-1 builds (TestAssignmentManager fails)
* [HBASE-12674] - Add permission check to getNamespaceDescriptor()
* [HBASE-12675] - Use interface methods in shell scripts
* [HBASE-12681] - truncate_preserve command fails with undefined method `getTable' error
* [HBASE-12683] - Compilation with hadoop-2.7.0-SNAPSHOT is broken
* [HBASE-12686] - Failures in split before PONR not clearing the daughter regions from regions in transition during rollback
* [HBASE-12692] - NPE from SnapshotManager#stop
* [HBASE-12694] - testTableExistsIfTheSpecifiedTableRegionIsSplitParent in TestSplitTransactionOnCluster class leaves regions in transition
* [HBASE-12696] - Possible NPE in HRegionFileSystem#splitStoreFile when skipStoreFileRangeCheck in splitPolicy return true
* [HBASE-12697] - Don't use RegionLocationFinder if localityCost == 0
* [HBASE-12699] - undefined method `setAsyncLogFlush' exception thrown when setting DEFERRED_LOG_FLUSH=>true
* [HBASE-12711] - Fix new findbugs warnings in hbase-thrift module
* [HBASE-12715] - getLastSequenceId always returns -1
* [HBASE-12716] - A bug in RegionSplitter.UniformSplit algorithm
* [HBASE-12718] - Convert TestAcidGuarantees from a unit test to an integration test
* [HBASE-12728] - buffered writes substantially less useful after removal of HTablePool
* [HBASE-12732] - Log messages in FileLink$FileLinkInputStream#tryOpen are reversed
* [HBASE-12739] - Avoid too large identifier of ZooKeeperWatcher
* [HBASE-12740] - Improve performance of TestHBaseFsck
* [HBASE-12741] - AccessController contains a javadoc issue
* [HBASE-12742] - ClusterStatusPublisher crashes with a IPv6 network interface.
* [HBASE-12744] - hbase-default.xml lists hbase.regionserver.global.memstore.size twice
* [HBASE-12746] - [1.0.0RC0] Distributed Log Replay is on (HBASE-12577 was insufficient)
* [HBASE-12747] - IntegrationTestMTTR will OOME if launched with mvn verify
* [HBASE-12750] - getRequestsCount() in ClusterStatus returns total number of request
* [HBASE-12767] - Fix a StoreFileScanner NPE in reverse scan flow
* [HBASE-12771] - TestFailFast#testFastFail failing
* [HBASE-12774] - Fix the inconsistent permission checks for bulkloading.
* [HBASE-12781] - thrift2 listen port will bind always to the passed command line address
* [HBASE-12782] - ITBLL fails for me if generator does anything but 5M per maptask
* [HBASE-12791] - HBase does not attempt to clean up an aborted split when the regionserver shutting down
* [HBASE-12798] - Map Reduce jobs should not create Tables in setConf()
* [HBASE-12801] - Failed to truncate a table while maintaing binary region boundaries
* [HBASE-12804] - ImportTsv fails to delete partition files created by it
* [HBASE-12810] - Update to htrace-incubating
* [HBASE-12811] - [AccessController] NPE while scanning a table with user not having READ permission on the namespace
* [HBASE-12817] - Data missing while scanning using PREFIX_TREE data block encoding
* [HBASE-12819] - ExportSnapshot doesn't close FileSystem instances
* [HBASE-12824] - CompressionTest fails with org.apache.hadoop.hbase.io.hfile.AbstractHFileReader$NotSeekedException: Not seeked to a key/value
* [HBASE-12831] - Changing the set of vis labels a user has access to doesn't generate an audit log event
* [HBASE-12832] - Describe table from shell no longer shows Table's attributes, only CF attributes
* [HBASE-12833] - [shell] table.rb leaks connections
* [HBASE-12835] - HBASE-12422 changed new HTable(Configuration) to not use managed Connections anymore
* [HBASE-12837] - ReplicationAdmin leaks zk connections
* [HBASE-12844] - ServerManager.isServerReacable() should sleep between retries
* [HBASE-12847] - TestZKLessSplitOnCluster frequently times out in 0.98 builds
* [HBASE-12862] - Uppercase "wals" in RegionServer webUI
* [HBASE-12863] - Master info port on RS UI is always 0
* [HBASE-12864] - IntegrationTestTableSnapshotInputFormat fails
* [HBASE-12874] - LoadIncrementalHFiles should use unmanaged connection
* [HBASE-12878] - Incorrect HFile path in TestHFilePerformance print output (fix for easier debugging)
* [HBASE-12881] - TestFastFail is not compatible with surefire.rerunFailingTestsCount
* [HBASE-12886] - Correct tag option name in PerformanceEvaluation
* [HBASE-12892] - Add a class to allow taking a snapshot from the command line
* [HBASE-12897] - Minimum memstore size is a percentage
* [HBASE-12898] - Add in used undeclared dependencies
* [HBASE-12901] - Possible deadlock while onlining a region and get region plan for other region run parallel
* [HBASE-12904] - Threading issues in region_mover.rb
* [HBASE-12915] - Disallow small scan with batching
* [HBASE-12916] - No access control for replicating WAL entries
* [HBASE-12917] - HFilePerformanceEvaluation Scan tests fail with StackOverflowError due to recursive call in createCell function
* [HBASE-12918] - Backport asciidoc changes
* [HBASE-12919] - Compilation with Hadoop-2.4- is broken again
* [HBASE-12925] - Use acl cache for doing access control checks in prepare and clean phases of Bulkloading.
* [HBASE-12942] - After disabling the hfile block cache, Regionserver UI is throwing java.lang.NullPointerException
* [HBASE-12956] - Binding to 0.0.0.0 is broken after HBASE-10569
* [HBASE-12958] - SSH doing hbase:meta get but hbase:meta not assigned
* [HBASE-12962] - TestHFileBlockIndex.testBlockIndex() commented out during HBASE-10531
* [HBASE-12966] - NPE in HMaster while recovering tables in Enabling state
* [HBASE-12971] - Replication stuck due to large default value for replication.source.maxretriesmultiplier
* [HBASE-12976] - Set default value for hbase.client.scanner.max.result.size
* [HBASE-12978] - Region goes permanently offline (WAS: hbase:meta has a row missing hregioninfo and it causes my long-running job to fail)
* [HBASE-12984] - SSL cannot be used by the InfoPort after removing deprecated code in HBASE-10336
* [HBASE-12985] - Javadoc warning and findbugs fixes to get us green again
* [HBASE-12989] - region_mover.rb unloadRegions method uses ArrayList concurrently resulting in errors
* [HBASE-12991] - Use HBase 1.0 interfaces in hbase-rest
* [HBASE-12996] - Reversed field on Filter should be transient
* [HBASE-12998] - Compilation with Hdfs-2.7.0-SNAPSHOT is broken after HDFS-7647
* [HBASE-13003] - Get tests in TestHFileBlockIndex back
* [HBASE-13009] - HBase REST UI inaccessible
* [HBASE-13010] - HFileOutputFormat2 partitioner's path is hard-coded as '/tmp'
* [HBASE-13026] - Wrong error message in case incorrect snapshot name OR Incorrect table name
* [HBASE-13027] - mapreduce.TableInputFormatBase should create its own Connection if needed
* [HBASE-13028] - Cleanup mapreduce API changes
* [HBASE-13030] - [1.0.0 polish] Make ScanMetrics public again and align Put 'add' with Get, Delete, etc., addColumn
* [HBASE-13037] - LoadIncrementalHFile should try to verify the content of unmatched families
* [HBASE-13038] - Fix the java doc warning continuously reported by Hadoop QA
* [HBASE-13039] - Add patchprocess/* to .gitignore to fix builds of branches
** Improvement
* [HBASE-5699] - Run with > 1 WAL in HRegionServer
* [HBASE-11195] - Potentially improve block locality during major compaction for old regions
* [HBASE-11412] - Minimize a number of hbase-client transitive dependencies
* [HBASE-11639] - [Visibility controller] Replicate the visibility of Cells as strings
* [HBASE-12071] - Separate out thread pool for Master <-> RegionServer communication
* [HBASE-12121] - maven release plugin does not allow for customized goals
* [HBASE-12204] - Backport HBASE-12016 'Reduce number of versions in Meta table. Make it configurable' to branch-1
* [HBASE-12373] - Provide a command to list visibility labels
* [HBASE-12583] - Allow creating reference files even the split row not lies in the storefile range if required
* [HBASE-12597] - Add RpcClient interface and enable changing of RpcClient implementation
* [HBASE-12608] - region_mover.rb does not log moving region count correctly when loading regions
* [HBASE-12630] - Provide capability for dropping malfunctioning ConfigurationObserver automatically
* [HBASE-12640] - Add Thrift-over-HTTPS and doAs support for Thrift Server
* [HBASE-12641] - Grant all permissions of hbase zookeeper node to hbase superuser in a secure cluster
* [HBASE-12651] - Backport HBASE-12559 'Provide LoadBalancer with online configuration capability' to branch-1
* [HBASE-12653] - Move TestRegionServerOnlineConfigChange & TestConfigurationManager to Junit4 tests
* [HBASE-12659] - Replace the method calls to grant and revoke in shell scripts with AccessControlClient
* [HBASE-12668] - Adapt PayloadCarryingRpcController so it can also be used in async way
* [HBASE-12676] - Fix the misleading ASCII art in IntegrationTestBigLinkedList
* [HBASE-12678] - HBCK should print command line arguments
* [HBASE-12680] - Refactor base ClusterManager in HBase to not have the notion of sending a signal.
* [HBASE-12719] - Add test WAL provider to quantify FSHLog overhead in the absence of HDFS.
* [HBASE-12720] - Make InternalScan LimitedPrivate
* [HBASE-12736] - Let MetaScanner recycle a given Connection
* [HBASE-12745] - Visibility Labels: support visibility labels for user groups.
* [HBASE-12762] - Region with no hfiles will have the highest locality cost in LocalityCostFunction
* [HBASE-12768] - Support enable cache_data_on_write in Shell while creating table
* [HBASE-12773] - Add warning message when user is trying to bulkload a large HFile.
* [HBASE-12825] - CallRunner exception messages should include destination host:port
* [HBASE-12893] - IntegrationTestBigLinkedListWithVisibility should use buffered writes
* [HBASE-12899] - HBase should prefix htrace configuration keys with "hbase.htrace" rather than just "hbase."
* [HBASE-12929] - TableMapReduceUtil.initTableMapperJob unnecessarily limits the types of outputKeyClass and outputValueClass
* [HBASE-12973] - RegionCoprocessorEnvironment should provide HRegionInfo directly
* [HBASE-12979] - Use setters instead of return values for handing back statistics from HRegion methods
* [HBASE-12997] - FSHLog should print pipeline on low replication
* [HBASE-13008] - Better default for hbase.regionserver.regionSplitLimit parameter.
** New Feature
* [HBASE-9531] - a command line (hbase shell) interface to retreive the replication metrics and show replication lag
* [HBASE-10560] - Per cell TTLs
* [HBASE-12709] - [mvn] Add unit test excludes command line flag to the build.
* [HBASE-12731] - Heap occupancy based client pushback
** Task
* [HBASE-12493] - User class should provide a way to re-use existing token
* [HBASE-12567] - Track remaining issues for HBase-1.0
* [HBASE-12624] - Remove rename_snapshot.rb from code as there is no equivalent renameSnapshot api in Admin class
* [HBASE-12625] - Deprecate certain methods in classes annotated with InterfaceAudience.Public in branch-1
* [HBASE-12689] - Move version on from 0.99.2 to HBASE-1.0.0-SNAPSHOT
* [HBASE-12724] - Upgrade the interface audience of RegionScanner from Private to LimitedPrivate
* [HBASE-12726] - Backport to branch-1.0 addendum for "Minimize a number of hbase-client transitive dependencies"
* [HBASE-12788] - Promote Abortable to LimitedPrivate
* [HBASE-12834] - Promote ScanType to LimitedPrivate
** Test
* [HBASE-12163] - Move test annotation classes to the same package as in master
* [HBASE-12645] - HBaseTestingUtility is using ${$HOME} for rootDir
* [HBASE-12685] - TestSplitLogManager#testLogFilesAreArchived sometimes times out due to race condition
* [HBASE-12799] - ITAG fails with java.lang.RuntimeException if table does not exist
* [HBASE-12885] - Unit test for RAW / VERSIONS scanner specifications
Release Notes - HBase - Version 0.99.2 12/07/2014
** Sub-task
* [HBASE-10671] - Add missing InterfaceAudience annotations for classes in hbase-common and hbase-client modules
* [HBASE-11164] - Document and test rolling updates from 0.98 -> 1.0
* [HBASE-11915] - Document and test 0.94 -> 1.0.0 update
* [HBASE-11964] - Improve spreading replication load from failed regionservers
* [HBASE-12075] - Preemptive Fast Fail
* [HBASE-12128] - Cache configuration and RpcController selection for Table in Connection
* [HBASE-12147] - Porting Online Config Change from 89-fb
* [HBASE-12202] - Support DirectByteBuffer usage in HFileBlock
* [HBASE-12214] - Visibility Controller in the peer cluster should be able to extract visibility tags from the replicated cells
* [HBASE-12288] - Support DirectByteBuffer usage in DataBlock Encoding area
* [HBASE-12297] - Support DBB usage in Bloom and HFileIndex area
* [HBASE-12313] - Redo the hfile index length optimization so cell-based rather than serialized KV key
* [HBASE-12353] - Turn down logging on some spewing unit tests
* [HBASE-12354] - Update dependencies in time for 1.0 release
* [HBASE-12355] - Update maven plugins
* [HBASE-12363] - Improve how KEEP_DELETED_CELLS works with MIN_VERSIONS
* [HBASE-12379] - Try surefire 2.18-SNAPSHOT
* [HBASE-12400] - Fix refguide so it does connection#getTable rather than new HTable everywhere: first cut!
* [HBASE-12404] - Task 5 from parent: Replace internal HTable constructor use with HConnection#getTable (0.98, 0.99)
* [HBASE-12471] - Task 4. replace internal ConnectionManager#{delete,get}Connection use with #close, #createConnection (0.98, 0.99) under src/main/java
* [HBASE-12517] - Several HConstant members are assignable
* [HBASE-12518] - Task 4 polish. Remove CM#{get,delete}Connection
* [HBASE-12519] - Remove tabs used as whitespace
* [HBASE-12526] - Remove unused imports
* [HBASE-12577] - Disable distributed log replay by default
** Bug
* [HBASE-7211] - Improve hbase ref guide for the testing part.
* [HBASE-9003] - TableMapReduceUtil should not rely on org.apache.hadoop.util.JarFinder#getJar
* [HBASE-9117] - Remove HTablePool and all HConnection pooling related APIs
* [HBASE-9157] - ZKUtil.blockUntilAvailable loops forever with non-recoverable errors
* [HBASE-9527] - Review all old api that takes a table name as a byte array and ensure none can pass ns + tablename
* [HBASE-10536] - ImportTsv should fail fast if any of the column family passed to the job is not present in the table
* [HBASE-10780] - HFilePrettyPrinter#processFile should return immediately if file does not exist
* [HBASE-11099] - Two situations where we could open a region with smaller sequence number
* [HBASE-11562] - CopyTable should provide an option to shuffle the mapper tasks
* [HBASE-11835] - Wrong managenement of non expected calls in the client
* [HBASE-12017] - Use Connection.createTable() instead of HTable constructors.
* [HBASE-12029] - Use Table and RegionLocator in HTable.getRegionLocations()
* [HBASE-12053] - SecurityBulkLoadEndPoint set 777 permission on input data files
* [HBASE-12072] - Standardize retry handling for master operations
* [HBASE-12083] - Deprecate new HBaseAdmin() in favor of Connection.getAdmin()
* [HBASE-12142] - Truncate command does not preserve ACLs table
* [HBASE-12194] - Make TestEncodedSeekers faster
* [HBASE-12219] - Cache more efficiently getAll() and get() in FSTableDescriptors
* [HBASE-12226] - TestAccessController#testPermissionList failing on master
* [HBASE-12229] - NullPointerException in SnapshotTestingUtils
* [HBASE-12234] - Make TestMultithreadedTableMapper a little more stable.
* [HBASE-12237] - HBaseZeroCopyByteString#wrap() should not be called in hbase-client code
* [HBASE-12238] - A few ugly exceptions on startup
* [HBASE-12240] - hbase-daemon.sh should remove pid file if process not found running
* [HBASE-12241] - The crash of regionServer when taking deadserver's replication queue breaks replication
* [HBASE-12242] - Fix new javadoc warnings in Admin, etc.
* [HBASE-12246] - Compilation with hadoop-2.3.x and 2.2.x is broken
* [HBASE-12247] - Replace setHTable() with initializeTable() in TableInputFormat.
* [HBASE-12248] - broken link in hbase shell help
* [HBASE-12252] - IntegrationTestBulkLoad fails with illegal partition error
* [HBASE-12257] - TestAssignmentManager unsynchronized access to regionPlans
* [HBASE-12258] - Make TestHBaseFsck less flaky
* [HBASE-12261] - Add checkstyle to HBase build process
* [HBASE-12263] - RegionServer listens on localhost in distributed cluster when DNS is unavailable
* [HBASE-12265] - HBase shell 'show_filters' points to internal Facebook URL
* [HBASE-12274] - Race between RegionScannerImpl#nextInternal() and RegionScannerImpl#close() may produce null pointer exception
* [HBASE-12277] - Refactor bulkLoad methods in AccessController to its own interface
* [HBASE-12278] - Race condition in TestSecureLoadIncrementalHFilesSplitRecovery
* [HBASE-12279] - Generated thrift files were generated with the wrong parameters
* [HBASE-12281] - ClonedPrefixTreeCell should implement HeapSize
* [HBASE-12285] - Builds are failing, possibly because of SUREFIRE-1091
* [HBASE-12294] - Can't build the docs after the hbase-checkstyle module was added
* [HBASE-12301] - user_permission command does not show global permissions
* [HBASE-12302] - VisibilityClient getAuths does not propagate remote service exception correctly
* [HBASE-12304] - CellCounter will throw AIOBE when output directory is not specified
* [HBASE-12306] - CellCounter output's wrong value for Total Families Across all Rows in output file
* [HBASE-12308] - Fix typo in hbase-rest profile name
* [HBASE-12312] - Another couple of createTable race conditions
* [HBASE-12314] - Add chaos monkey policy to execute two actions concurrently
* [HBASE-12315] - Fix 0.98 Tests after checkstyle got parented
* [HBASE-12316] - test-patch.sh (Hadoop-QA) outputs the wrong release audit warnings URL
* [HBASE-12318] - Add license header to checkstyle xml files
* [HBASE-12319] - Inconsistencies during region recovery due to close/open of a region during recovery
* [HBASE-12322] - Add clean up command to ITBLL
* [HBASE-12327] - MetricsHBaseServerSourceFactory#createContextName has wrong conditions
* [HBASE-12329] - Table create with duplicate column family names quietly succeeds
* [HBASE-12334] - Handling of DeserializationException causes needless retry on failure
* [HBASE-12336] - RegionServer failed to shutdown for NodeFailoverWorker thread
* [HBASE-12337] - Import tool fails with NullPointerException if clusterIds is not initialized
* [HBASE-12346] - Scan's default auths behavior under Visibility labels
* [HBASE-12352] - Add hbase-annotation-tests to runtime classpath so can run hbase it tests.
* [HBASE-12356] - Rpc with region replica does not propagate tracing spans
* [HBASE-12359] - MulticastPublisher should specify IPv4/v6 protocol family when creating multicast channel
* [HBASE-12366] - Add login code to HBase Canary tool.
* [HBASE-12372] - [WINDOWS] Enable log4j configuration in hbase.cmd
* [HBASE-12375] - LoadIncrementalHFiles fails to load data in table when CF name starts with '_'
* [HBASE-12377] - HBaseAdmin#deleteTable fails when META region is moved around the same timeframe
* [HBASE-12384] - TestTags can hang on fast test hosts
* [HBASE-12386] - Replication gets stuck following a transient zookeeper error to remote peer cluster
* [HBASE-12398] - Region isn't assigned in an extreme race condition
* [HBASE-12399] - Master startup race between metrics and RpcServer
* [HBASE-12402] - ZKPermissionWatcher race condition in refreshing the cache leaving stale ACLs and causing AccessDenied
* [HBASE-12407] - HConnectionKey doesn't contain CUSTOM_CONTROLLER_CONF_KEY in CONNECTION_PROPERTIES
* [HBASE-12414] - Move HFileLink.exists() to base class
* [HBASE-12417] - Scan copy constructor does not retain small attribute
* [HBASE-12419] - "Partial cell read caused by EOF" ERRORs on replication source during replication
* [HBASE-12420] - BucketCache logged startup message is egregiously large
* [HBASE-12423] - Use a non-managed Table in TableOutputFormat
* [HBASE-12428] - region_mover.rb script is broken if port is not specified
* [HBASE-12440] - Region may remain offline on clean startup under certain race condition
* [HBASE-12445] - hbase is removing all remaining cells immediately after the cell marked with marker = KeyValue.Type.DeleteColumn via PUT
* [HBASE-12448] - Fix rate reporting in compaction progress DEBUG logging
* [HBASE-12449] - Use the max timestamp of current or old cell's timestamp in HRegion.append()
* [HBASE-12450] - Unbalance chaos monkey might kill all region servers without starting them back
* [HBASE-12459] - Use a non-managed Table in mapred.TableOutputFormat
* [HBASE-12460] - Moving Chore to hbase-common module.
* [HBASE-12461] - FSVisitor logging is excessive
* [HBASE-12464] - meta table region assignment stuck in the FAILED_OPEN state due to region server not fully ready to serve
* [HBASE-12478] - HBASE-10141 and MIN_VERSIONS are not compatible
* [HBASE-12479] - Backport HBASE-11689 (Track meta in transition) to 0.98 and branch-1
* [HBASE-12490] - Replace uses of setAutoFlush(boolean, boolean)
* [HBASE-12491] - TableMapReduceUtil.findContainingJar() NPE
* [HBASE-12495] - Use interfaces in the shell scripts
* [HBASE-12513] - Graceful stop script does not restore the balancer state
* [HBASE-12514] - Cleanup HFileOutputFormat legacy code
* [HBASE-12520] - Add protected getters on TableInputFormatBase
* [HBASE-12533] - staging directories are not deleted after secure bulk load
* [HBASE-12536] - Reduce the effective scope of GLOBAL CREATE and ADMIN permission
* [HBASE-12537] - HBase should log the remote host on replication error
* [HBASE-12539] - HFileLinkCleaner logs are uselessly noisy
* [HBASE-12541] - Add misc debug logging to hanging tests in TestHCM and TestBaseLoadBalancer
* [HBASE-12544] - ops_mgt.xml missing in branch-1
* [HBASE-12550] - Check all storefiles are referenced before splitting
* [HBASE-12560] - [WINDOWS] Append the classpath from Hadoop to HBase classpath in bin/hbase.cmd
* [HBASE-12576] - Add metrics for rolling the HLog if there are too few DN's in the write pipeline
* [HBASE-12580] - Zookeeper instantiated even though we might not need it in the shell
* [HBASE-12581] - TestCellACLWithMultipleVersions failing since task 5 HBASE-12404 (HBASE-12404 addendum)
* [HBASE-12584] - Fix branch-1 failing since task 5 HBASE-12404 (HBASE-12404 addendum)
* [HBASE-12595] - Use Connection.getTable() in table.rb
* [HBASE-12600] - Remove REPLAY tag dependency in Distributed Replay Mode
* [HBASE-12610] - Close connection in TableInputFormatBase
* [HBASE-12611] - Create autoCommit() method and remove clearBufferOnFail
* [HBASE-12614] - Potentially unclosed StoreFile(s) in DefaultCompactor#compact()
* [HBASE-12616] - We lost the IntegrationTestBigLinkedList COMMANDS in recent usage refactoring
** Improvement
* [HBASE-2609] - Harmonize the Get and Delete operations
* [HBASE-4955] - Use the official versions of surefire & junit
* [HBASE-8361] - Bulk load and other utilities should not create tables for user
* [HBASE-8572] - Enhance delete_snapshot.rb to call snapshot deletion API with regex
* [HBASE-10082] - Describe 'table' output is all on one line, could use better formatting
* [HBASE-10483] - Provide API for retrieving info port when hbase.master.info.port is set to 0
* [HBASE-11639] - [Visibility controller] Replicate the visibility of Cells as strings
* [HBASE-11870] - Optimization : Avoid copy of key and value for tags addition in AC and VC
* [HBASE-12161] - Add support for grant/revoke on namespaces in AccessControlClient
* [HBASE-12243] - HBaseFsck should auto set ignorePreCheckPermission to true if no fix option is set.
* [HBASE-12249] - Script to help you adhere to the patch-naming guidelines
* [HBASE-12264] - ImportTsv should fail fast if output is not specified and table does not exist
* [HBASE-12271] - Add counters for files skipped during snapshot export
* [HBASE-12272] - Generate Thrift code through maven
* [HBASE-12328] - Need to separate JvmMetrics for Master and RegionServer
* [HBASE-12389] - Reduce the number of versions configured for the ACL table
* [HBASE-12390] - Change revision style from svn to git
* [HBASE-12411] - Optionally enable p-reads and private readers for compactions
* [HBASE-12416] - RegionServerCallable should report what host it was communicating with
* [HBASE-12424] - Finer grained logging and metrics for split transactions
* [HBASE-12432] - RpcRetryingCaller should log after fixed number of retries like AsyncProcess
* [HBASE-12434] - Add a command to compact all the regions in a regionserver
* [HBASE-12447] - Add support for setTimeRange for RowCounter and CellCounter
* [HBASE-12455] - Add 'description' to bean and attribute output when you do /jmx?description=true
* [HBASE-12529] - Use ThreadLocalRandom for RandomQueueBalancer
* [HBASE-12569] - Control MaxDirectMemorySize in the same manner as heap size
** New Feature
* [HBASE-8707] - Add LongComparator for filter
* [HBASE-12286] - [shell] Add server/cluster online load of configuration changes
* [HBASE-12361] - Show data locality of region in table page
* [HBASE-12496] - A blockedRequestsCount metric
** Task
* [HBASE-10200] - Better error message when HttpServer fails to start due to java.net.BindException
* [HBASE-10870] - Deprecate and replace HCD methods that have a 'should' prefix with a 'get' instead
* [HBASE-12250] - Adding an endpoint for updating the regionserver config
* [HBASE-12344] - Split up TestAdmin
* [HBASE-12381] - Add maven enforcer rules for build assumptions
* [HBASE-12388] - Document that WALObservers don't get empty edits.
* [HBASE-12427] - Change branch-1 version from 0.99.2-SNAPSHOT to 0.99.3-SNAPSHOT
* [HBASE-12442] - Bring KeyValue#createFirstOnRow() back to branch-1 as deprecated methods
* [HBASE-12456] - Update surefire from 2.18-SNAPSHOT to 2.18
* [HBASE-12516] - Clean up master so QA Bot is in known good state
* [HBASE-12522] - Backport WAL refactoring to branch-1
** Test
* [HBASE-12317] - Run IntegrationTestRegionReplicaPerf w.o mapred
* [HBASE-12335] - IntegrationTestRegionReplicaPerf is flaky
* [HBASE-12367] - Integration tests should not restore the cluster if the CM is not destructive
* [HBASE-12378] - Add a test to verify that the read-replica is able to read after a compaction
* [HBASE-12401] - Add some timestamp signposts in IntegrationTestMTTR
* [HBASE-12403] - IntegrationTestMTTR flaky due to aggressive RS restart timeout
* [HBASE-12472] - Improve debuggability of IntegrationTestBulkLoad
* [HBASE-12549] - Fix TestAssignmentManagerOnCluster#testAssignRacingWithSSH() flaky test
* [HBASE-12554] - TestBaseLoadBalancer may timeout due to lengthy rack lookup
** Umbrella
* [HBASE-10602] - Cleanup HTable public interface
* [HBASE-10856] - Prep for 1.0
Release Notes - HBase - Version 0.99.1 10/15/2014
** Sub-task
* [HBASE-11160] - Undo append waiting on region edit/sequence id update
* [HBASE-11178] - Remove deprecation annotations from mapred namespace
* [HBASE-11738] - Document improvements to LoadTestTool and PerformanceEvaluation
* [HBASE-11872] - Avoid usage of KeyValueUtil#ensureKeyValue from Compactor
* [HBASE-11874] - Support Cell to be passed to StoreFile.Writer rather than KeyValue
* [HBASE-11917] - Deprecate / Remove HTableUtil
* [HBASE-11920] - Add CP hooks for ReplicationEndPoint
* [HBASE-11930] - Document new permission check to roll WAL writer
* [HBASE-11980] - Change sync to hsync, remove unused InfoServer, and reference our httpserver instead of hadoops
* [HBASE-11997] - CopyTable with bulkload
* [HBASE-12023] - HRegion.applyFamilyMapToMemstore creates too many iterator objects.
* [HBASE-12046] - HTD/HCD setters should be builder-style
* [HBASE-12047] - Avoid usage of KeyValueUtil#ensureKeyValue in simple cases
* [HBASE-12050] - Avoid KeyValueUtil#ensureKeyValue from DefaultMemStore
* [HBASE-12051] - Avoid KeyValueUtil#ensureKeyValue from DefaultMemStore
* [HBASE-12059] - Create hbase-annotations module
* [HBASE-12062] - Fix usage of Collections.toArray
* [HBASE-12068] - [Branch-1] Avoid need to always do KeyValueUtil#ensureKeyValue for Filter transformCell
* [HBASE-12069] - Finish making HFile.Writer Cell-centric; undo APIs that expect KV serializations.
* [HBASE-12076] - Move InterfaceAudience imports to hbase-annotations
* [HBASE-12077] - FilterLists create many ArrayList$Itr objects per row.
* [HBASE-12079] - Deprecate KeyValueUtil#ensureKeyValue(s)
* [HBASE-12082] - Find a way to set timestamp on Cells on the server
* [HBASE-12086] - Fix bugs in HTableMultiplexer
* [HBASE-12096] - In ZKSplitLog Coordination and AggregateImplementation replace enhaced for statements with basic for statement to avoid unnecessary object allocation
* [HBASE-12104] - Some optimization and bugfix for HTableMultiplexer
* [HBASE-12110] - Fix .arcconfig
* [HBASE-12112] - Avoid KeyValueUtil#ensureKeyValue some more simple cases
* [HBASE-12115] - Fix NumberFormat Exception in TableInputFormatBase.
* [HBASE-12189] - Fix new issues found by coverity static analysis
* [HBASE-12210] - Avoid KeyValue in Prefix Tree
** Bug
* [HBASE-6994] - minor doc update about DEFAULT_ACCEPTABLE_FACTOR
* [HBASE-8808] - Use Jacoco to generate Unit Test coverage reports
* [HBASE-8936] - Fixing TestSplitLogWorker while running Jacoco tests.
* [HBASE-9005] - Improve documentation around KEEP_DELETED_CELLS, time range scans, and delete markers
* [HBASE-9513] - Why is PE#RandomSeekScanTest way slower in 0.96 than in 0.94?
* [HBASE-10314] - Add Chaos Monkey that doesn't touch the master
* [HBASE-10748] - hbase-daemon.sh fails to execute with 'sh' command
* [HBASE-10757] - Change HTable class doc so it sends people to HCM getting instances
* [HBASE-11145] - UNEXPECTED!!! when HLog sync: Queue full
* [HBASE-11266] - Remove shaded references to logger
* [HBASE-11394] - Replication can have data loss if peer id contains hyphen "-"
* [HBASE-11401] - Late-binding sequenceid presumes a particular KeyValue mvcc format hampering experiment
* [HBASE-11405] - Multiple invocations of hbck in parallel disables balancer permanently
* [HBASE-11804] - Raise default heap size if unspecified
* [HBASE-11815] - Flush and compaction could just close the tmp writer if there is an exception
* [HBASE-11890] - HBase REST Client is hard coded to http protocol
* [HBASE-11906] - Meta data loss with distributed log replay
* [HBASE-11967] - HMaster in standalone won't go down if it gets 'Unhandled exception'
* [HBASE-11974] - When a disabled table is scanned, NotServingRegionException is thrown instead of TableNotEnabledException
* [HBASE-11982] - Bootstraping hbase:meta table creates a WAL file in region dir
* [HBASE-11988] - AC/VC system table create on postStartMaster fails too often in test
* [HBASE-11991] - Region states may be out of sync
* [HBASE-11994] - PutCombiner floods the M/R log with repeated log messages.
* [HBASE-12007] - StochasticBalancer should avoid putting user regions on master
* [HBASE-12019] - hbase-daemon.sh overwrite HBASE_ROOT_LOGGER and HBASE_SECURITY_LOGGER variables
* [HBASE-12024] - Fix javadoc warning
* [HBASE-12025] - TestHttpServerLifecycle.testStartedServerWithRequestLog hangs frequently
* [HBASE-12034] - If I kill single RS in branch-1, all regions end up on Master!
* [HBASE-12038] - Replace internal uses of signatures with byte[] and String tableNames to use the TableName equivalents.
* [HBASE-12041] - AssertionError in HFilePerformanceEvaluation.UniformRandomReadBenchmark
* [HBASE-12042] - Replace internal uses of HTable(Configuration, String) with HTable(Configuration, TableName)
* [HBASE-12043] - REST server should respond with FORBIDDEN(403) code on AccessDeniedException
* [HBASE-12044] - REST delete operation should not retry disableTable for DoNotRetryIOException
* [HBASE-12045] - REST proxy users configuration in hbase-site.xml is ignored
* [HBASE-12052] - BulkLoad Failed due to no write permission on input files
* [HBASE-12054] - bad state after NamespaceUpgrade with reserved table names
* [HBASE-12056] - RPC logging too much in DEBUG mode
* [HBASE-12064] - hbase.master.balancer.stochastic.numRegionLoadsToRemember is not used
* [HBASE-12065] - Import tool is not restoring multiple DeleteFamily markers of a row
* [HBASE-12067] - Remove deprecated metrics classes.
* [HBASE-12078] - Missing Data when scanning using PREFIX_TREE DATA-BLOCK-ENCODING
* [HBASE-12095] - SecureWALCellCodec should handle the case where encryption is disabled
* [HBASE-12098] - User granted namespace table create permissions can't create a table
* [HBASE-12099] - TestScannerModel fails if using jackson 1.9.13
* [HBASE-12106] - Move test annotations to test artifact
* [HBASE-12109] - user_permission command for namespace does not return correct result
* [HBASE-12119] - Master regionserver web UI NOT_FOUND
* [HBASE-12120] - HBase shell doesn't allow deleting of a cell by user with W-only permissions to it
* [HBASE-12122] - Try not to assign user regions to master all the time
* [HBASE-12123] - Failed assertion in BucketCache after 11331
* [HBASE-12124] - Closed region could stay closed if master stops at bad time
* [HBASE-12126] - Region server coprocessor endpoint
* [HBASE-12130] - HBASE-11980 calls hflush and hsync doing near double the syncing work
* [HBASE-12134] - publish_website.sh script is too optimistic
* [HBASE-12135] - Website is broken
* [HBASE-12136] - Race condition between client adding tableCF replication znode and server triggering TableCFsTracker
* [HBASE-12137] - Alter table add cf doesn't do compression test
* [HBASE-12139] - StochasticLoadBalancer doesn't work on large lightly loaded clusters
* [HBASE-12140] - Add ConnectionFactory.createConnection() to create using default HBaseConfiguration.
* [HBASE-12145] - Fix javadoc and findbugs so new folks aren't freaked when they see them
* [HBASE-12146] - RegionServerTracker should escape data in log messages
* [HBASE-12149] - TestRegionPlacement is failing undeterministically
* [HBASE-12151] - Make dev scripts executable
* [HBASE-12153] - Fixing TestReplicaWithCluster
* [HBASE-12156] - TableName cache isn't used for one of valueOf methods.
* [HBASE-12158] - TestHttpServerLifecycle.testStartedServerWithRequestLog goes zombie on occasion
* [HBASE-12160] - Make Surefire's argLine configurable in the command line
* [HBASE-12164] - Check for presence of user Id in SecureBulkLoadEndpoint#secureBulkLoadHFiles() is inaccurate
* [HBASE-12165] - TestEndToEndSplitTransaction.testFromClientSideWhileSplitting fails
* [HBASE-12166] - TestDistributedLogSplitting.testMasterStartsUpWithLogReplayWork
* [HBASE-12167] - NPE in AssignmentManager
* [HBASE-12170] - TestReplicaWithCluster.testReplicaAndReplication timeouts
* [HBASE-12181] - Some tests create a table and try to use it before regions get assigned
* [HBASE-12183] - FuzzyRowFilter doesn't support reverse scans
* [HBASE-12184] - ServerShutdownHandler throws NPE
* [HBASE-12191] - Make TestCacheOnWrite faster.
* [HBASE-12196] - SSH should retry in case failed to assign regions
* [HBASE-12197] - Move REST
* [HBASE-12198] - Fix the bug of not updating location cache
* [HBASE-12199] - Make TestAtomicOperation and TestEncodedSeekers faster
* [HBASE-12200] - When an RPC server handler thread dies, throw exception
* [HBASE-12206] - NPE in RSRpcServices
* [HBASE-12209] - NPE in HRegionServer#getLastSequenceId
* [HBASE-12218] - Make HBaseCommonTestingUtil#deleteDir try harder
** Improvement
* [HBASE-10153] - improve VerifyReplication to compute BADROWS more accurately
* [HBASE-10411] - [Book] Add a kerberos 'request is a replay (34)' issue at troubleshooting section
* [HBASE-11796] - Add client support for atomic checkAndMutate
* [HBASE-11879] - Change TableInputFormatBase to take interface arguments
* [HBASE-11907] - Use the joni byte[] regex engine in place of j.u.regex in RegexStringComparator
* [HBASE-11948] - graceful_stop.sh should use hbase-daemon.sh when executed on the decomissioned node
* [HBASE-12010] - Use TableName.META_TABLE_NAME instead of indirectly from HTableDescriptor
* [HBASE-12011] - Add namespace column during display of user tables
* [HBASE-12013] - Make region_mover.rb support multiple regionservers per host
* [HBASE-12021] - Hbase shell does not respect the HBASE_OPTS set by the user in console
* [HBASE-12032] - Script to stop regionservers via RPC
* [HBASE-12049] - Help for alter command is a bit confusing
* [HBASE-12090] - Bytes: more Unsafe, more Faster
* [HBASE-12118] - Explain how to grant permission to a namespace in grant command usage
* [HBASE-12176] - WALCellCodec Encoders support for non-KeyValue Cells
* [HBASE-12212] - HBaseTestingUtility#waitUntilAllRegionsAssigned should wait for RegionStates
* [HBASE-12220] - Add hedgedReads and hedgedReadWins metrics
** New Feature
* [HBASE-11990] - Make setting the start and stop row for a specific prefix easier
* [HBASE-11995] - Use Connection and ConnectionFactory where possible
* [HBASE-12127] - Move the core Connection creation functionality into ConnectionFactory
* [HBASE-12133] - Add FastLongHistogram for metric computation
* [HBASE-12143] - Minor fix for Table code
** Task
* [HBASE-9004] - Fix Documentation around Minor compaction and ttl
* [HBASE-11692] - Document how and why to do a manual region split
* [HBASE-11730] - Document release managers for non-deprecated branches
* [HBASE-11761] - Add a FAQ item for updating a maven-managed application from 0.94 -> 0.96+
* [HBASE-11960] - Provide a sample to show how to use Thrift client authentication
* [HBASE-11978] - Backport 'HBASE-7767 Get rid of ZKTable, and table enable/disable state in ZK' to 1.0
* [HBASE-11981] - Document how to find the units of measure for a given HBase metric
** Test
* [HBASE-11798] - TestBucketWriterThread may hang due to WriterThread stopping prematurely
* [HBASE-11838] - Enable PREFIX_TREE in integration tests
* [HBASE-12008] - Remove IntegrationTestImportTsv#testRunFromOutputCommitter
* [HBASE-12055] - TestBucketWriterThread hangs flakily based on timing
Release Notes - HBase - Version 0.99.0 9/22/2014
** Sub-task
* [HBASE-2251] - PE defaults to 1k rows - uncommon use case, and easy to hit benchmarks
* [HBASE-5175] - Add DoubleColumnInterpreter
* [HBASE-6873] - Clean up Coprocessor loading failure handling
* [HBASE-8541] - implement flush-into-stripes in stripe compactions
* [HBASE-9149] - javadoc cleanup of to reflect .META. rename to hbase:meta
* [HBASE-9261] - Add cp hooks after {start|close}RegionOperation
* [HBASE-9489] - Add cp hooks in online merge before and after setting PONR
* [HBASE-9846] - Integration test and LoadTestTool support for cell ACLs
* [HBASE-9858] - Integration test and LoadTestTool support for cell Visibility
* [HBASE-9889] - Make sure we clean up scannerReadPoints upon any exceptions
* [HBASE-9941] - The context ClassLoader isn't set while calling into a coprocessor
* [HBASE-9966] - Create IntegrationTest for Online Bloom Filter Change
* [HBASE-9977] - Define C interface of HBase Client Asynchronous APIs
* [HBASE-10043] - Fix Potential Resouce Leak in MultiTableInputFormatBase
* [HBASE-10094] - Add batching to HLogPerformanceEvaluation
* [HBASE-10110] - Fix Potential Resource Leak in StoreFlusher
* [HBASE-10124] - Make Sub Classes Static When Possible
* [HBASE-10143] - Clean up dead local stores in FSUtils
* [HBASE-10150] - Write attachment Id of tested patch into JIRA comment
* [HBASE-10156] - FSHLog Refactor (WAS -> Fix up the HBASE-8755 slowdown when low contention)
* [HBASE-10158] - Add sync rate histogram to HLogPE
* [HBASE-10169] - Batch coprocessor
* [HBASE-10297] - LoadAndVerify Integration Test for cell visibility
* [HBASE-10347] - HRegionInfo changes for adding replicaId and MetaEditor/MetaReader changes for region replicas
* [HBASE-10348] - HTableDescriptor changes for region replicas
* [HBASE-10350] - Master/AM/RegionStates changes to create and assign region replicas
* [HBASE-10351] - LoadBalancer changes for supporting region replicas
* [HBASE-10352] - Region and RegionServer changes for opening region replicas, and refreshing store files
* [HBASE-10354] - Add an API for defining consistency per request
* [HBASE-10355] - Failover RPC's from client using region replicas
* [HBASE-10356] - Failover RPC's for multi-get
* [HBASE-10357] - Failover RPC's for scans
* [HBASE-10359] - Master/RS WebUI changes for region replicas
* [HBASE-10361] - Enable/AlterTable support for region replicas
* [HBASE-10362] - HBCK changes for supporting region replicas
* [HBASE-10391] - Deprecate KeyValue#getBuffer
* [HBASE-10420] - Replace KV.getBuffer with KV.get{Row|Family|Qualifier|Value|Tags}Array
* [HBASE-10513] - Provide user documentation for region replicas
* [HBASE-10517] - NPE in MetaCache.clearCache()
* [HBASE-10519] - Add handling for swallowed InterruptedException thrown by Thread.sleep in rest related files
* [HBASE-10520] - Add handling for swallowed InterruptedException thrown by Thread.sleep in MiniZooKeeperCluster
* [HBASE-10521] - Add handling for swallowed InterruptedException thrown by Thread.sleep in RpcServer
* [HBASE-10522] - Correct wrong handling and add proper handling for swallowed InterruptedException thrown by Thread.sleep in client
* [HBASE-10523] - Correct wrong handling and add proper handling for swallowed InterruptedException thrown by Thread.sleep in util
* [HBASE-10524] - Correct wrong handling and add proper handling for swallowed InterruptedException thrown by Thread.sleep in regionserver
* [HBASE-10526] - Using Cell instead of KeyValue in HFileOutputFormat
* [HBASE-10529] - Make Cell extend Cloneable
* [HBASE-10530] - Add util methods in CellUtil
* [HBASE-10531] - Revisit how the key byte[] is passed to HFileScanner.seekTo and reseekTo
* [HBASE-10532] - Make KeyValueComparator in KeyValue to accept Cell instead of KeyValue.
* [HBASE-10550] - Register HBase tokens with ServiceLoader
* [HBASE-10561] - Forward port: HBASE-10212 New rpc metric: number of active handler
* [HBASE-10572] - Create an IntegrationTest for region replicas
* [HBASE-10573] - Use Netty 4
* [HBASE-10616] - Integration test for multi-get calls
* [HBASE-10620] - LoadBalancer.needsBalance() should check for co-located region replicas as well
* [HBASE-10630] - NullPointerException in ConnectionManager$HConnectionImplementation.locateRegionInMeta() due to missing region info
* [HBASE-10633] - StoreFileRefresherChore throws ConcurrentModificationException sometimes
* [HBASE-10634] - Multiget doesn't fully work
* [HBASE-10648] - Pluggable Memstore
* [HBASE-10650] - Fix incorrect handling of IE that restores current thread's interrupt status within while/for loops in RegionServer
* [HBASE-10651] - Fix incorrect handling of IE that restores current thread's interrupt status within while/for loops in Replication
* [HBASE-10652] - Fix incorrect handling of IE that restores current thread's interrupt status within while/for loops in rpc
* [HBASE-10661] - TestStochasticLoadBalancer.testRegionReplicationOnMidClusterWithRacks() is flaky
* [HBASE-10672] - Table snapshot should handle tables whose REGION_REPLICATION is greater than one
* [HBASE-10680] - Check if the block keys, index keys can be used as Cells instead of byte[]
* [HBASE-10688] - Add a draining_node script to manage nodes in draining mode
* [HBASE-10691] - test-patch.sh should continue even if compilation against hadoop 1.0 / 1.1 fails
* [HBASE-10697] - Convert TestSimpleTotalOrderPartitioner to junit4 test
* [HBASE-10701] - Cache invalidation improvements from client side
* [HBASE-10704] - BaseLoadBalancer#roundRobinAssignment() may add same region to assignment plan multiple times
* [HBASE-10717] - TestFSHDFSUtils#testIsSameHdfs fails with IllegalArgumentException running against hadoop 2.3
* [HBASE-10723] - Convert TestExplicitColumnTracker to junit4 test
* [HBASE-10729] - Enable table doesn't balance out replicas evenly if the replicas were unassigned earlier
* [HBASE-10734] - Fix RegionStates.getRegionAssignments to not add duplicate regions
* [HBASE-10741] - Deprecate HTablePool and HTableFactory
* [HBASE-10743] - Replica map update is problematic in RegionStates
* [HBASE-10750] - Pluggable MemStoreLAB
* [HBASE-10778] - Unique keys accounting in MultiThreadedReader is incorrect
* [HBASE-10779] - Doc hadoop1 deprecated in 0.98 and NOT supported in hbase 1.0
* [HBASE-10781] - Remove hadoop-one-compat module and all references to hadoop1
* [HBASE-10791] - Add integration test to demonstrate performance improvement
* [HBASE-10794] - multi-get should handle replica location missing from cache
* [HBASE-10796] - Set default log level as INFO
* [HBASE-10801] - Ensure DBE interfaces can work with Cell
* [HBASE-10810] - LoadTestTool should share the connection and connection pool
* [HBASE-10815] - Master regionserver should be rolling-upgradable
* [HBASE-10817] - Add some tests on a real cluster for replica: multi master, replication
* [HBASE-10818] - Add integration test for bulkload with replicas
* [HBASE-10822] - Thread local addendum to HBASE-10656 Counter
* [HBASE-10841] - Scan,Get,Put,Delete,etc setters should consistently return this
* [HBASE-10855] - Enable hfilev3 by default
* [HBASE-10858] - TestRegionRebalancing is failing
* [HBASE-10859] - Use HFileLink in opening region files from secondaries
* [HBASE-10888] - Enable distributed log replay as default
* [HBASE-10915] - Decouple region closing (HM and HRS) from ZK
* [HBASE-10918] - [VisibilityController] System table backed ScanLabelGenerator
* [HBASE-10929] - Change ScanQueryMatcher to use Cells instead of KeyValue.
* [HBASE-10930] - Change Filters and GetClosestRowBeforeTracker to work with Cells
* [HBASE-10957] - HBASE-10070: HMaster can abort with NPE in #rebuildUserRegions
* [HBASE-10962] - Decouple region opening (HM and HRS) from ZK
* [HBASE-10963] - Refactor cell ACL tests
* [HBASE-10972] - OOBE in prefix key encoding
* [HBASE-10985] - Decouple Split Transaction from Zookeeper
* [HBASE-10993] - Deprioritize long-running scanners
* [HBASE-11025] - Infrastructure for pluggable consensus service
* [HBASE-11027] - Remove kv.isDeleteXX() and related methods and use CellUtil apis.
* [HBASE-11053] - Change DeleteTracker APIs to work with Cell
* [HBASE-11054] - Create new hook in StoreScanner to help user creating his own delete tracker
* [HBASE-11059] - ZK-less region assignment
* [HBASE-11069] - Decouple region merging from ZooKeeper
* [HBASE-11072] - Abstract WAL splitting from ZK
* [HBASE-11077] - [AccessController] Restore compatible early-out access denial
* [HBASE-11088] - Support Visibility Expression Deletes in Shell
* [HBASE-11092] - Server interface should have method getConsensusProvider()
* [HBASE-11094] - Distributed log replay is incompatible for rolling restarts
* [HBASE-11098] - Improve documentation around our blockcache options
* [HBASE-11101] - Documentation review
* [HBASE-11102] - Document JDK versions supported by each release
* [HBASE-11108] - Split ZKTable into interface and implementation
* [HBASE-11109] - flush region sequence id may not be larger than all edits flushed
* [HBASE-11135] - Change region sequenceid generation so happens earlier in the append cycle rather than just before added to file
* [HBASE-11140] - LocalHBaseCluster should create ConsensusProvider per each server
* [HBASE-11161] - Provide example of POJO encoding with protobuf
* [HBASE-11171] - More doc improvements on block cache options
* [HBASE-11214] - Fixes for scans on a replicated table
* [HBASE-11229] - Change block cache percentage metrics to be doubles rather than ints
* [HBASE-11280] - Document distributed log replay and distributed log splitting
* [HBASE-11307] - Deprecate SlabCache
* [HBASE-11318] - Classes in security subpackages missing @InterfaceAudience annotations.
* [HBASE-11332] - Fix for metas location cache from HBASE-10785
* [HBASE-11367] - Pluggable replication endpoint
* [HBASE-11372] - Remove SlabCache
* [HBASE-11384] - [Visibility Controller]Check for users covering authorizations for every mutation
* [HBASE-11395] - Add logging for HBase table operations
* [HBASE-11471] - Move TableStateManager and ZkTableStateManager and Server to hbase-server
* [HBASE-11483] - Check the rest of the book for new XML validity errors and fix
* [HBASE-11508] - Document changes to IPC config parameters from HBASE-11492
* [HBASE-11511] - Write flush events to WAL
* [HBASE-11512] - Write region open/close events to WAL
* [HBASE-11520] - Simplify offheap cache config by removing the confusing "hbase.bucketcache.percentage.in.combinedcache"
* [HBASE-11559] - Add dumping of DATA block usage to the BlockCache JSON report.
* [HBASE-11572] - Add support for doing get/scans against a particular replica_id
* [HBASE-11573] - Report age on eviction
* [HBASE-11610] - Enhance remote meta updates
* [HBASE-11651] - Add conf which disables MetaMigrationConvertingToPB check (for experts only)
* [HBASE-11722] - Document new shortcut commands introduced by HBASE-11649
* [HBASE-11734] - Document changed behavior of hbase.hstore.time.to.purge.deletes
* [HBASE-11736] - Document SKIP_FLUSH snapshot option
* [HBASE-11737] - Document callQueue improvements from HBASE-11355 and HBASE-11724
* [HBASE-11739] - Document blockCache contents report in the UI
* [HBASE-11740] - RegionStates.getRegionAssignments() gets stuck on clone
* [HBASE-11752] - Document blockcache prefetch option
* [HBASE-11753] - Document HBASE_SHELL_OPTS environment variable
* [HBASE-11781] - Document new TableMapReduceUtil scanning options
* [HBASE-11784] - Document global configuration for maxVersion
* [HBASE-11822] - Convert EnvironmentEdge#getCurrentTimeMillis to getCurrentTime
* [HBASE-11919] - Remove the deprecated pre/postGet CP hook
* [HBASE-11923] - Potential race condition in RecoverableZookeeper.checkZk()
* [HBASE-11934] - Support KeyValueCodec to encode non KeyValue cells.
* [HBASE-11941] - Rebuild site because of major structural changes to HTML
* [HBASE-11963] - Synchronize peer cluster replication connection attempts
** Brainstorming
* [HBASE-9507] - Promote methods of WALActionsListener to WALObserver
* [HBASE-11209] - Increase the default value for hbase.hregion.memstore.block.multipler from 2 to 4
** Bug
* [HBASE-3787] - Increment is non-idempotent but client retries RPC
* [HBASE-4931] - CopyTable instructions could be improved.
* [HBASE-5356] - region_mover.rb can hang if table region it belongs to is deleted.
* [HBASE-6506] - Setting CACHE_BLOCKS to false in an hbase shell scan doesn't work
* [HBASE-6642] - enable_all,disable_all,drop_all can call "list" command with regex directly.
* [HBASE-6701] - Revisit thrust of paragraph on splitting
* [HBASE-7226] - HRegion.checkAndMutate uses incorrect comparison result for <, <=, > and >=
* [HBASE-7963] - HBase VerifyReplication not working when security enabled
* [HBASE-8112] - Deprecate HTable#batch(final List<? extends Row>)
* [HBASE-8269] - Fix data locallity documentation.
* [HBASE-8304] - Bulkload fails to remove files if fs.default.name / fs.defaultFS is configured without default port
* [HBASE-8529] - checkOpen is missing from multi, mutate, get and multiGet etc.
* [HBASE-8701] - distributedLogReplay need to apply wal edits in the receiving order of those edits
* [HBASE-8713] - [hadoop1] Log spam each time the WAL is rolled
* [HBASE-8803] - region_mover.rb should move multiple regions at a time
* [HBASE-8817] - Enhance The Apache HBase Reference Guide
* [HBASE-9151] - HBCK cannot fix when meta server znode deleted, this can happen if all region servers stopped and there are no logs to split.
* [HBASE-9292] - Syncer fails but we won't go down
* [HBASE-9294] - NPE in /rs-status during RS shutdown
* [HBASE-9346] - HBCK should provide an option to check if regions boundaries are the same in META and in stores.
* [HBASE-9445] - Snapshots should create column family dirs for empty regions
* [HBASE-9473] - Change UI to list 'system tables' rather than 'catalog tables'.
* [HBASE-9485] - TableOutputCommitter should implement recovery if we don't want jobs to start from 0 on RM restart
* [HBASE-9708] - Improve Snapshot Name Error Message
* [HBASE-9721] - RegionServer should not accept regionOpen RPC intended for another(previous) server
* [HBASE-9745] - Append HBASE_CLASSPATH to end of Java classpath and use another env var for prefix
* [HBASE-9746] - RegionServer can't start when replication tries to replicate to an unknown host
* [HBASE-9754] - Eliminate threadlocal from MVCC code
* [HBASE-9778] - Add hint to ExplicitColumnTracker to avoid seeking
* [HBASE-9990] - HTable uses the conf for each "newCaller"
* [HBASE-10018] - Remove region location prefetching
* [HBASE-10061] - TableMapReduceUtil.findOrCreateJar calls updateMap(null, ) resulting in thrown NPE
* [HBASE-10069] - Potential duplicate calls to log#appendNoSync() in HRegion#doMiniBatchMutation()
* [HBASE-10073] - Revert HBASE-9718 (Add a test scope dependency on org.slf4j:slf4j-api to hbase-client)
* [HBASE-10079] - Race in TableName cache
* [HBASE-10080] - Unnecessary call to locateRegion when creating an HTable instance
* [HBASE-10084] - [WINDOWS] bin\hbase.cmd should allow whitespaces in java.library.path and classpath
* [HBASE-10087] - Store should be locked during a memstore snapshot
* [HBASE-10090] - Master could hang in assigning meta
* [HBASE-10097] - Remove a region name string creation in HRegion#nextInternal
* [HBASE-10098] - [WINDOWS] pass in native library directory from hadoop for unit tests
* [HBASE-10099] - javadoc warning introduced by LabelExpander 188: warning - @return tag has no arguments
* [HBASE-10101] - testOfflineRegionReAssginedAfterMasterRestart times out sometimes.
* [HBASE-10103] - TestNodeHealthCheckChore#testRSHealthChore: Stoppable must have been stopped
* [HBASE-10107] - [JDK7] TestHBaseSaslRpcClient.testHBaseSaslRpcClientCreation failing on Jenkins
* [HBASE-10108] - NullPointerException thrown while use Canary with '-regionserver' option
* [HBASE-10112] - Hbase rest query params for maxVersions and maxValues are not parsed
* [HBASE-10114] - _scan_internal() in table.rb should accept argument that specifies reverse scan
* [HBASE-10117] - Avoid synchronization in HRegionScannerImpl.isFilterDone
* [HBASE-10118] - Major compact keeps deletes with future timestamps
* [HBASE-10120] - start-hbase.sh doesn't respect --config in non-distributed mode
* [HBASE-10123] - Change default ports; move them out of linux ephemeral port range
* [HBASE-10132] - sun.security.pkcs11.wrapper.PKCS11Exception: CKR_ARGUMENTS_BAD
* [HBASE-10135] - Remove ? extends from HLogSplitter#getOutputCounts
* [HBASE-10137] - GeneralBulkAssigner with retain assignment plan can be used in EnableTableHandler to bulk assign the regions
* [HBASE-10138] - incorrect or confusing test value is used in block caches
* [HBASE-10142] - TestLogRolling#testLogRollOnDatanodeDeath test failure
* [HBASE-10146] - Bump HTrace version to 2.04
* [HBASE-10148] - [VisibilityController] Tolerate regions in recovery
* [HBASE-10149] - TestZKPermissionsWatcher.testPermissionsWatcher test failure
* [HBASE-10155] - HRegion isRecovering state is wrongly coming in postOpen hook
* [HBASE-10161] - [AccessController] Tolerate regions in recovery
* [HBASE-10163] - Example Thrift DemoClient is flaky
* [HBASE-10176] - Canary#sniff() should close the HTable instance
* [HBASE-10178] - Potential null object dereference in TablePermission#equals()
* [HBASE-10179] - HRegionServer underreports readRequestCounts by 1 under certain conditions
* [HBASE-10182] - Potential null object deference in AssignmentManager#handleRegion()
* [HBASE-10186] - region_mover.rb broken because ServerName constructor is changed to private
* [HBASE-10187] - AccessController#preOpen - Include 'labels' table also into special tables list.
* [HBASE-10193] - Cleanup HRegion if one of the store fails to open at region initialization
* [HBASE-10194] - [Usability]: Instructions in CompactionTool no longer accurate because of namespaces
* [HBASE-10196] - Enhance HBCK to understand the case after online region merge
* [HBASE-10205] - ConcurrentModificationException in BucketAllocator
* [HBASE-10207] - ZKVisibilityLabelWatcher : Populate the labels cache on startup
* [HBASE-10210] - during master startup, RS can be you-are-dead-ed by master in error
* [HBASE-10215] - TableNotFoundException should be thrown after removing stale znode in ETH
* [HBASE-10219] - HTTPS support for HBase in RegionServerListTmpl.jamon
* [HBASE-10220] - Put all test service principals into the superusers list
* [HBASE-10221] - Region from coprocessor invocations can be null on failure
* [HBASE-10223] - [VisibilityController] cellVisibility presence check on Delete mutation is wrong
* [HBASE-10225] - Bug in calls to RegionObsever.postScannerFilterRow
* [HBASE-10226] - [AccessController] Namespace grants not always checked
* [HBASE-10231] - Potential NPE in HBaseFsck#checkMetaRegion()
* [HBASE-10232] - Remove native profile from hbase-shell
* [HBASE-10233] - VisibilityController is too chatty at DEBUG level
* [HBASE-10249] - TestReplicationSyncUpTool fails because failover takes too long
* [HBASE-10251] - Restore API Compat for PerformanceEvaluation.generateValue()
* [HBASE-10260] - Canary Doesn't pick up Configuration properly.
* [HBASE-10264] - [MapReduce]: CompactionTool in mapred mode is missing classes in its classpath
* [HBASE-10267] - TestNamespaceCommands occasionally fails
* [HBASE-10268] - TestSplitLogWorker occasionally fails
* [HBASE-10271] - [regression] Cannot use the wildcard address since HBASE-9593
* [HBASE-10272] - Cluster becomes nonoperational if the node hosting the active Master AND ROOT/META table goes offline
* [HBASE-10274] - MiniZookeeperCluster should close ZKDatabase when shutdown ZooKeeperServers
* [HBASE-10284] - Build broken with svn 1.8
* [HBASE-10292] - TestRegionServerCoprocessorExceptionWithAbort fails occasionally
* [HBASE-10298] - TestIOFencing occasionally fails
* [HBASE-10302] - Fix rat check issues in hbase-native-client.
* [HBASE-10304] - Running an hbase job jar: IllegalAccessError: class com.google.protobuf.ZeroCopyLiteralByteString cannot access its superclass com.google.protobuf.LiteralByteString
* [HBASE-10307] - IntegrationTestIngestWithEncryption assumes localhost cluster
* [HBASE-10310] - ZNodeCleaner session expired for /hbase/master
* [HBASE-10312] - Flooding the cluster with administrative actions leads to collapse
* [HBASE-10313] - Duplicate servlet-api jars in hbase 0.96.0
* [HBASE-10315] - Canary shouldn't exit with 3 if there is no master running.
* [HBASE-10316] - Canary#RegionServerMonitor#monitorRegionServers() should close the scanner returned by table.getScanner()
* [HBASE-10317] - getClientPort method of MiniZooKeeperCluster does not always return the correct value
* [HBASE-10318] - generate-hadoopX-poms.sh expects the version to have one extra '-'
* [HBASE-10320] - Avoid ArrayList.iterator() ExplicitColumnTracker
* [HBASE-10321] - CellCodec has broken the 96 client to 98 server compatibility
* [HBASE-10322] - Strip tags from KV while sending back to client on reads
* [HBASE-10326] - Super user should be able scan all the cells irrespective of the visibility labels
* [HBASE-10327] - Remove remove(K, V) from type PoolMap<K,V>
* [HBASE-10329] - Fail the writes rather than proceeding silently to prevent data loss when AsyncSyncer encounters null writer and its writes aren't synced by other Asyncer
* [HBASE-10330] - TableInputFormat/TableRecordReaderImpl leaks HTable
* [HBASE-10332] - Missing .regioninfo file during daughter open processing
* [HBASE-10333] - Assignments are not retained on a cluster start
* [HBASE-10334] - RegionServer links in table.jsp is broken
* [HBASE-10335] - AuthFailedException in zookeeper may block replication forever
* [HBASE-10336] - Remove deprecated usage of Hadoop HttpServer in InfoServer
* [HBASE-10337] - HTable.get() uninteruptible
* [HBASE-10338] - Region server fails to start with AccessController coprocessor if installed into RegionServerCoprocessorHost
* [HBASE-10339] - Mutation::getFamilyMap method was lost in 98
* [HBASE-10349] - Table became unusable when master balanced its region after table was dropped
* [HBASE-10365] - HBaseFsck should clean up connection properly when repair is completed
* [HBASE-10370] - Compaction in out-of-date Store causes region split failure
* [HBASE-10371] - Compaction creates empty hfile, then selects this file for compaction and creates empty hfile and over again
* [HBASE-10375] - hbase-default.xml hbase.status.multicast.address.port does not match code
* [HBASE-10384] - Failed to increment serveral columns in one Increment
* [HBASE-10392] - Correct references to hbase.regionserver.global.memstore.upperLimit
* [HBASE-10397] - Fix findbugs introduced from HBASE-9426
* [HBASE-10400] - [hbck] Continue if region dir missing on region merge attempt
* [HBASE-10401] - [hbck] perform overlap group merges in parallel
* [HBASE-10407] - String Format Exception
* [HBASE-10412] - Distributed log replay : Cell tags getting missed
* [HBASE-10413] - Tablesplit.getLength returns 0
* [HBASE-10417] - index is not incremented in PutSortReducer#reduce()
* [HBASE-10422] - ZeroCopyLiteralByteString.zeroCopyGetBytes has an unusable prototype and conflicts with AsyncHBase
* [HBASE-10426] - user_permission in security.rb calls non-existent UserPermission#getTable method
* [HBASE-10428] - Test jars should have scope test
* [HBASE-10429] - Make Visibility Controller to throw a better msg if it is of type RegionServerCoprocessor
* [HBASE-10431] - Rename com.google.protobuf.ZeroCopyLiteralByteString
* [HBASE-10432] - Rpc retries non-recoverable error
* [HBASE-10433] - SecureProtobufWALReader does not handle unencrypted WALs if configured to encrypt
* [HBASE-10434] - Store Tag compression information for a WAL in its header
* [HBASE-10435] - Lower the log level of Canary region server match
* [HBASE-10436] - restore regionserver lists removed from hbase 0.96+ jmx
* [HBASE-10438] - NPE from LRUDictionary when size reaches the max init value
* [HBASE-10441] - [docs] nit default max versions is now 1 instead of 3 after HBASE-8450
* [HBASE-10442] - prepareDelete() isn't called before doPreMutationHook for a row deletion case
* [HBASE-10443] - IndexOutOfBoundExceptions when processing compressed tags in HFile
* [HBASE-10446] - Backup master gives Error 500 for debug dump
* [HBASE-10447] - Memstore flusher scans storefiles also when the scanner heap gets reset
* [HBASE-10448] - ZKUtil create and watch methods don't set watch in some cases
* [HBASE-10449] - Wrong execution pool configuration in HConnectionManager
* [HBASE-10451] - Enable back Tag compression on HFiles
* [HBASE-10452] - Fix potential bugs in exception handlers
* [HBASE-10454] - Tags presence file info can be wrong in HFiles when PrefixTree encoding is used
* [HBASE-10455] - cleanup InterruptedException management
* [HBASE-10456] - Balancer should not run if it's just turned off.
* [HBASE-10458] - Typo in book chapter 9 architecture.html
* [HBASE-10459] - Broken link F.1. HBase Videos
* [HBASE-10460] - Return value of Scan#setSmall() should be void
* [HBASE-10461] - table.close() in TableEventHandler#reOpenAllRegions() should be enclosed in finally block
* [HBASE-10469] - Hbase book client.html has a broken link
* [HBASE-10470] - Import generates huge log file while importing large amounts of data
* [HBASE-10472] - Manage the interruption in ZKUtil#getData
* [HBASE-10476] - HBase Master log grows very fast after stopped hadoop (due to connection exception)
* [HBASE-10477] - Regression from HBASE-10337
* [HBASE-10478] - Hbase book presentations page has broken link
* [HBASE-10481] - API Compatibility JDiff script does not properly handle arguments in reverse order
* [HBASE-10482] - ReplicationSyncUp doesn't clean up its ZK, needed for tests
* [HBASE-10485] - PrefixFilter#filterKeyValue() should perform filtering on row key
* [HBASE-10486] - ProtobufUtil Append & Increment deserialization lost cell level timestamp
* [HBASE-10488] - 'mvn site' is broken due to org.apache.jasper.JspC not found
* [HBASE-10490] - Simplify RpcClient code
* [HBASE-10493] - InclusiveStopFilter#filterKeyValue() should perform filtering on row key
* [HBASE-10495] - upgrade script is printing usage two times with help option.
* [HBASE-10500] - Some tools OOM when BucketCache is enabled
* [HBASE-10501] - Improve IncreasingToUpperBoundRegionSplitPolicy to avoid too many regions
* [HBASE-10506] - Fail-fast if client connection is lost before the real call be executed in RPC layer
* [HBASE-10510] - HTable is not closed in LoadTestTool#loadTable()
* [HBASE-10514] - Forward port HBASE-10466, possible data loss when failed flushes
* [HBASE-10516] - Refactor code where Threads.sleep is called within a while/for loop
* [HBASE-10525] - Allow the client to use a different thread for writing to ease interrupt
* [HBASE-10533] - commands.rb is giving wrong error messages on exceptions
* [HBASE-10534] - Rowkey in TsvImporterTextMapper initializing with wrong length
* [HBASE-10537] - Let the ExportSnapshot mapper fail and retry on error
* [HBASE-10539] - HRegion.addAndGetGlobalMemstoreSize returns previous size
* [HBASE-10545] - RS Hangs waiting on region to close on shutdown; has to timeout before can go down
* [HBASE-10546] - Two scanner objects are open for each hbase map task but only one scanner object is closed
* [HBASE-10547] - TestFixedLengthWrapper#testReadWrite occasionally fails with the IBM JDK
* [HBASE-10548] - Correct commons-math dependency version
* [HBASE-10549] - When there is a hole, LoadIncrementalHFiles will hang in an infinite loop.
* [HBASE-10552] - HFilePerformanceEvaluation.GaussianRandomReadBenchmark fails sometimes.
* [HBASE-10556] - Possible data loss due to non-handled DroppedSnapshotException for user-triggered flush from client/shell
* [HBASE-10563] - Set name for FlushHandler thread
* [HBASE-10564] - HRegionServer.nextLong should be removed since it's not used anywhere, or should be used somewhere it meant to
* [HBASE-10565] - FavoredNodesPlan accidentally uses an internal Netty type
* [HBASE-10566] - cleanup rpcTimeout in the client
* [HBASE-10567] - Add overwrite manifest option to ExportSnapshot
* [HBASE-10575] - ReplicationSource thread can't be terminated if it runs into the loop to contact peer's zk ensemble and fails continuously
* [HBASE-10579] - [Documentation]: ExportSnapshot tool package incorrectly documented
* [HBASE-10580] - IntegrationTestingUtility#restoreCluster leak resource when running in a mini cluster mode
* [HBASE-10581] - ACL znode are left without PBed during upgrading hbase0.94* to hbase0.96+
* [HBASE-10582] - 0.94->0.96 Upgrade: ACL can't be repopulated when ACL table contains row for table '-ROOT' or '.META.'
* [HBASE-10585] - Avoid early creation of Node objects in LRUDictionary.BidirectionalLRUMap
* [HBASE-10586] - hadoop2-compat IPC metric registred twice
* [HBASE-10587] - Master metrics clusterRequests is wrong
* [HBASE-10593] - FileInputStream in JenkinsHash#main() is never closed
* [HBASE-10594] - Speed up TestRestoreSnapshotFromClient
* [HBASE-10598] - Written data can not be read out because MemStore#timeRangeTracker might be updated concurrently
* [HBASE-10600] - HTable#batch() should perform validation on empty Put
* [HBASE-10604] - Fix parseArgs javadoc
* [HBASE-10606] - Bad timeout in RpcRetryingCaller#callWithRetries w/o parameters
* [HBASE-10608] - Acquire the FS Delegation Token for Secure ExportSnapshot
* [HBASE-10611] - Description for hbase:acl table is wrong on master-status#catalogTables
* [HBASE-10614] - Master could not be stopped
* [HBASE-10618] - User should not be allowed to disable/drop visibility labels table
* [HBASE-10621] - Unable to grant user permission to namespace
* [HBASE-10622] - Improve log and Exceptions in Export Snapshot
* [HBASE-10624] - Fix 2 new findbugs warnings introduced by HBASE-10598
* [HBASE-10627] - A logic mistake in HRegionServer isHealthy
* [HBASE-10631] - Avoid extra seek on FileLink open
* [HBASE-10632] - Region lost in limbo after ArrayIndexOutOfBoundsException during assignment
* [HBASE-10637] - rpcClient: Setup the iostreams when writing
* [HBASE-10639] - Unload script displays wrong counts (off by one) when unloading regions
* [HBASE-10644] - TestSecureExportSnapshot#testExportFileSystemState fails on hadoop-1
* [HBASE-10656] - high-scale-lib's Counter depends on Oracle (Sun) JRE, and also has some bug
* [HBASE-10660] - MR over snapshots can OOM when alternative blockcache is enabled
* [HBASE-10662] - RegionScanner is never closed if the region has been moved-out or re-opened when performing scan request
* [HBASE-10665] - TestCompaction and TestCompactionWithCoprocessor run too long
* [HBASE-10666] - TestMasterCoprocessorExceptionWithAbort hangs at shutdown
* [HBASE-10668] - TestExportSnapshot runs too long
* [HBASE-10669] - [hbck tool] Usage is wrong for hbck tool for -sidelineCorruptHfiles option
* [HBASE-10675] - IntegrationTestIngestWithACL should allow User to be passed as Parameter
* [HBASE-10677] - boundaries check in hbck throwing IllegalArgumentException
* [HBASE-10679] - Both clients get wrong scan results if the first scanner expires and the second scanner is created with the same scannerId on the same region
* [HBASE-10682] - region_mover.rb throws "can't convert nil into String" for regions moved
* [HBASE-10685] - [WINDOWS] TestKeyStoreKeyProvider fails on windows
* [HBASE-10686] - [WINDOWS] TestStripeStoreFileManager fails on windows
* [HBASE-10687] - Fix description about HBaseLocalFileSpanReceiver in reference manual
* [HBASE-10692] - The Multi TableMap job don't support the security HBase cluster
* [HBASE-10694] - TableSkewCostFunction#cost() casts integral division result to double
* [HBASE-10705] - CompactionRequest#toString() may throw NullPointerException
* [HBASE-10706] - Disable writeToWal in tests where possible
* [HBASE-10714] - SyncFuture hangs when sequence is 0
* [HBASE-10715] - TimeRange has a poorly formatted error message
* [HBASE-10716] - [Configuration]: hbase.regionserver.region.split.policy should be part of hbase-default.xml
* [HBASE-10718] - TestHLogSplit fails when it sets a KV size to be negative
* [HBASE-10720] - rpcClient: Wrong log level when closing the connection
* [HBASE-10726] - Fix java.lang.ArrayIndexOutOfBoundsException in StochasticLoadBalancer$LocalityBasedCandidateGenerator
* [HBASE-10731] - Fix environment variables typos in scripts
* [HBASE-10735] - [WINDOWS] Set -XX:MaxPermSize for unit tests
* [HBASE-10736] - Fix Javadoc warnings introduced in HBASE-10169
* [HBASE-10737] - HConnectionImplementation should stop RpcClient on close
* [HBASE-10738] - AssignmentManager should shut down executors on stop
* [HBASE-10739] - RS web UI NPE if master shuts down sooner
* [HBASE-10745] - Access ShutdownHook#fsShutdownHooks should be synchronized
* [HBASE-10749] - CellComparator.compareStatic() compares type wrongly
* [HBASE-10751] - TestHRegion testWritesWhileScanning occasional fail since HBASE-10514 went in
* [HBASE-10755] - MetricsRegionSourceImpl creates metrics that start with a lower case
* [HBASE-10760] - Wrong methods' names in ClusterLoadState class
* [HBASE-10762] - clone_snapshot doesn't check for missing namespace
* [HBASE-10766] - SnapshotCleaner allows to delete referenced files
* [HBASE-10770] - Don't exit from the Canary daemon mode if no regions are present
* [HBASE-10792] - RingBufferTruck does not release its payload
* [HBASE-10793] - AuthFailed as a valid zookeeper state
* [HBASE-10799] - [WINDOWS] TestImportTSVWithVisibilityLabels.testBulkOutputWithTsvImporterTextMapper fails on windows
* [HBASE-10802] - CellComparator.compareStaticIgnoreMvccVersion compares type wrongly
* [HBASE-10804] - Add a validations step to ExportSnapshot
* [HBASE-10805] - Speed up KeyValueHeap.next() a bit
* [HBASE-10806] - Two protos missing in hbase-protocol/pom.xml
* [HBASE-10809] - HBaseAdmin#deleteTable fails when META region happen to move around same time
* [HBASE-10814] - RpcClient: some calls can get stuck when connection is closing
* [HBASE-10825] - Add copy-from option to ExportSnapshot
* [HBASE-10829] - Flush is skipped after log replay if the last recovered edits file is skipped
* [HBASE-10830] - Integration test MR jobs attempt to load htrace jars from the wrong location
* [HBASE-10831] - IntegrationTestIngestWithACL is not setting up LoadTestTool correctly
* [HBASE-10833] - Region assignment may fail during cluster start up
* [HBASE-10838] - Insufficient AccessController covering permission check
* [HBASE-10839] - NullPointerException in construction of RegionServer in Security Cluster
* [HBASE-10840] - Fix findbug warn induced by HBASE-10569
* [HBASE-10845] - Memstore snapshot size isn't updated in DefaultMemStore#rollback()
* [HBASE-10846] - Links between active and backup masters are broken
* [HBASE-10848] - Filter SingleColumnValueFilter combined with NullComparator does not work
* [HBASE-10849] - Fix increased javadoc warns
* [HBASE-10850] - essential column family optimization is broken
* [HBASE-10851] - Wait for regionservers to join the cluster
* [HBASE-10853] - NPE in RSRpcServices.get on trunk
* [HBASE-10854] - [VisibilityController] Apply MAX_VERSIONS from schema or request when scanning
* [HBASE-10860] - Insufficient AccessController covering permission check
* [HBASE-10862] - Update config field names in hbase-default.xml description for hbase.hregion.memstore.block.multiplier
* [HBASE-10863] - Scan doesn't return rows for user who has authorization by visibility label in secure deployment
* [HBASE-10864] - Spelling nit
* [HBASE-10890] - ExportSnapshot needs to add acquired token to job
* [HBASE-10895] - unassign a region fails due to the hosting region server is in FailedServerList
* [HBASE-10897] - On master start, deadlock if refresh UI
* [HBASE-10899] - [AccessController] Apply MAX_VERSIONS from schema or request when scanning
* [HBASE-10903] - HBASE-10740 regression; cannot pass commands for zk to run
* [HBASE-10917] - Fix hbase book "Tests" page
* [HBASE-10922] - Log splitting status should always be closed
* [HBASE-10931] - Enhance logs
* [HBASE-10941] - default for max version isn't updated in doc after change on 0.96
* [HBASE-10948] - Fix hbase table file 'x' mode
* [HBASE-10949] - Reversed scan could hang
* [HBASE-10954] - Fix TestCloseRegionHandler.testFailedFlushAborts
* [HBASE-10955] - HBCK leaves the region in masters in-memory RegionStates if region hdfs dir is lost
* [HBASE-10958] - [dataloss] Bulk loading with seqids can prevent some log entries from being replayed
* [HBASE-10964] - Delete mutation is not consistent with Put wrt timestamp
* [HBASE-10966] - RowCounter misinterprets column names that have colons in their qualifier
* [HBASE-10967] - CatalogTracker.waitForMeta should not wait indefinitely silently
* [HBASE-10968] - Null check in TableSnapshotInputFormat#TableSnapshotRegionRecordReader#initialize() is redundant
* [HBASE-10970] - [AccessController] Issues with covering cell permission checks
* [HBASE-10976] - Start CatalogTracker after cluster ID is available
* [HBASE-10979] - Fix AnnotationReadingPriorityFunction "scan" handling
* [HBASE-10995] - Fix resource leak related to unclosed HBaseAdmin
* [HBASE-11005] - Remove dead code in HalfStoreFileReader#getScanner#seekBefore()
* [HBASE-11009] - We sync every hbase:meta table write twice
* [HBASE-11011] - Avoid extra getFileStatus() calls on Region startup
* [HBASE-11012] - InputStream is not properly closed in two methods of JarFinder
* [HBASE-11018] - ZKUtil.getChildDataAndWatchForNewChildren() will not return null as indicated
* [HBASE-11028] - FSLog: Avoid an extra sync if the current transaction is already sync'd
* [HBASE-11030] - HBaseTestingUtility.getMiniHBaseCluster should be able to return null
* [HBASE-11036] - Online schema change with region merge may cause data loss
* [HBASE-11038] - Filtered scans can bypass metrics collection
* [HBASE-11049] - HBase WALPlayer needs to add credentials to job to play to table
* [HBASE-11052] - Sending random data crashes thrift service
* [HBASE-11055] - Extends the sampling size
* [HBASE-11064] - Odd behaviors of TableName for empty namespace
* [HBASE-11081] - Trunk Master won't start; looking for Constructor that takes conf only
* [HBASE-11082] - Potential unclosed TraceScope in FSHLog#replaceWriter()
* [HBASE-11096] - stop method of Master and RegionServer coprocessor is not invoked
* [HBASE-11112] - PerformanceEvaluation should document --multiGet option on its printUsage.
* [HBASE-11117] - [AccessController] checkAndPut/Delete hook should check only Read permission
* [HBASE-11118] - non environment variable solution for "IllegalAccessError: class com.google.protobuf.ZeroCopyLiteralByteString cannot access its superclass com.google.protobuf.LiteralByteString"
* [HBASE-11120] - Update documentation about major compaction algorithm
* [HBASE-11133] - Add an option to skip snapshot verification after Export
* [HBASE-11139] - BoundedPriorityBlockingQueue#poll() should check the return value from awaitNanos()
* [HBASE-11143] - Improve replication metrics
* [HBASE-11149] - Wire encryption is broken
* [HBASE-11150] - Images in website are broken
* [HBASE-11155] - Fix Validation Errors in Ref Guide
* [HBASE-11162] - RegionServer webui uses the default master info port irrespective of the user configuration.
* [HBASE-11168] - [docs] Remove references to RowLocks in post 0.96 docs.
* [HBASE-11169] - nit: fix incorrect javadoc in OrderedBytes about BlobVar and BlobCopy
* [HBASE-11176] - Make /src/main/xslt/configuration_to_docbook_section.xsl produce better Docbook
* [HBASE-11177] - 'hbase.rest.filter.classes' exists in hbase-default.xml twice
* [HBASE-11185] - Parallelize Snapshot operations
* [HBASE-11186] - Improve TestExportSnapshot verifications
* [HBASE-11189] - Subprocedure should be marked as complete upon failure
* [HBASE-11190] - Fix easy typos in documentation
* [HBASE-11194] - [AccessController] issue with covering permission check in case of concurrent op on same row
* [HBASE-11196] - Update description of -ROOT- in ref guide
* [HBASE-11202] - Cleanup on HRegion class
* [HBASE-11212] - Fix increment index in KeyValueSortReducer
* [HBASE-11215] - Deprecate void setAutoFlush(boolean autoFlush, boolean clearBufferOnFail)
* [HBASE-11217] - Race between SplitLogManager task creation + TimeoutMonitor
* [HBASE-11218] - Data loss in HBase standalone mode
* [HBASE-11226] - Document and increase the default value for hbase.hstore.flusher.count
* [HBASE-11234] - FastDiffDeltaEncoder#getFirstKeyInBlock returns wrong result
* [HBASE-11237] - Bulk load initiated by user other than hbase fails
* [HBASE-11238] - Add info about SlabCache and BucketCache to Ref Guide
* [HBASE-11239] - Forgot to svn add test that was part of HBASE-11171, TestCacheConfig
* [HBASE-11248] - KeyOnlyKeyValue#toString() passes wrong offset to keyToString()
* [HBASE-11251] - LoadTestTool should grant READ permission for the users that are given READ access for specific cells
* [HBASE-11252] - Fixing new javadoc warnings in master branch
* [HBASE-11253] - IntegrationTestWithCellVisibilityLoadAndVerify failing since HBASE-10326
* [HBASE-11255] - Negative request num in region load
* [HBASE-11260] - hbase-default.xml refers to hbase.regionserver.global.memstore.upperLimit which is deprecated
* [HBASE-11267] - Dynamic metrics2 metrics may consume large amount of heap memory
* [HBASE-11268] - HTablePool is now a deprecated class, should update docs to reflect this
* [HBASE-11273] - Fix jersey and slf4j deps
* [HBASE-11275] - [AccessController] postCreateTable hook fails when another CP creates table on their startup
* [HBASE-11277] - RPCServer threads can wedge under high load
* [HBASE-11279] - Block cache could be disabled by mistake
* [HBASE-11285] - Expand coprocs info in Ref Guide
* [HBASE-11297] - Remove some synchros in the rpcServer responder
* [HBASE-11298] - Simplification in RpcServer code
* [HBASE-11302] - ReplicationSourceManager#sources is not thread safe
* [HBASE-11310] - Delete's copy constructor should copy the attributes also
* [HBASE-11311] - Secure Bulk Load does not execute chmod 777 on the files
* [HBASE-11312] - Minor refactoring of TestVisibilityLabels class
* [HBASE-11320] - Reenable bucket cache logging
* [HBASE-11324] - Update 2.5.2.8. Managed Compactions
* [HBASE-11327] - ExportSnapshot hit stackoverflow error when target snapshotDir doesn't contain uri
* [HBASE-11329] - Minor fixup of new blockcache tab number formatting
* [HBASE-11335] - Fix the TABLE_DIR param in TableSnapshotInputFormat
* [HBASE-11337] - Document how to create, modify, delete a table using Java
* [HBASE-11338] - Expand documentation on bloom filters
* [HBASE-11340] - Remove references to xcievers in documentation
* [HBASE-11341] - ZKProcedureCoordinatorRpcs should respond only to members
* [HBASE-11342] - The method isChildReadLock in class ZKInterProcessLockBase is wrong
* [HBASE-11347] - For some errors, the client can retry infinitely
* [HBASE-11353] - Wrong Write Request Count
* [HBASE-11363] - Access checks in preCompact and preCompactSelection are out of sync
* [HBASE-11371] - Typo in Thrift2 docs
* [HBASE-11373] - hbase-protocol compile failed for name conflict of RegionTransition
* [HBASE-11374] - RpcRetryingCaller#callWithoutRetries has a timeout of zero
* [HBASE-11378] - TableMapReduceUtil overwrites user supplied options for multiple tables/scaners job
* [HBASE-11380] - HRegion lock object is not being released properly, leading to snapshot failure
* [HBASE-11382] - Adding unit test for HBASE-10964 (Delete mutation is not consistent with Put wrt timestamp)
* [HBASE-11387] - metrics: wrong totalRequestCount
* [HBASE-11391] - Thrift table creation will fail with default TTL with sanity checks
* [HBASE-11396] - Invalid meta entries can lead to unstartable master
* [HBASE-11397] - When merging expired stripes, we need to create an empty file to preserve metadata.
* [HBASE-11399] - Improve Quickstart chapter and move Pseudo-distributed and distributed to it
* [HBASE-11403] - Fix race conditions around Object#notify
* [HBASE-11413] - [findbugs] RV: Negating the result of compareTo()/compare()
* [HBASE-11418] - build target "site" doesn't respect hadoop-two.version property
* [HBASE-11422] - Specification of scope is missing for certain Hadoop dependencies
* [HBASE-11423] - Visibility label and per cell ACL feature not working with HTable#mutateRow() and MultiRowMutationEndpoint
* [HBASE-11424] - Avoid usage of CellUtil#getTagArray(Cell cell) within server
* [HBASE-11430] - lastFlushSeqId has been updated wrongly during region open
* [HBASE-11432] - [AccessController] Remove cell first strategy
* [HBASE-11433] - LruBlockCache does not respect its configurable parameters
* [HBASE-11435] - Visibility labelled cells fail to getting replicated
* [HBASE-11439] - StripeCompaction may not obey the OffPeak rule to compaction
* [HBASE-11442] - ReplicationSourceManager doesn't cleanup the queues for recovered sources
* [HBASE-11445] - TestZKProcedure#testMultiCohortWithMemberTimeoutDuringPrepare is flaky
* [HBASE-11448] - Fix javadoc warnings
* [HBASE-11449] - IntegrationTestIngestWithACL fails to use different users after HBASE-10810
* [HBASE-11457] - Increment HFile block encoding IVs accounting for ciper's internal use
* [HBASE-11458] - NPEs if RegionServer cannot initialize
* [HBASE-11460] - Deadlock in HMaster on masterAndZKLock in HConnectionManager
* [HBASE-11463] - (findbugs) HE: Class defines equals() and uses Object.hashCode()
* [HBASE-11465] - [VisibilityController] Reserved tags check not happening for Append/Increment
* [HBASE-11475] - Distributed log replay should also replay compaction events
* [HBASE-11476] - Expand 'Conceptual View' section of Data Model chapter
* [HBASE-11477] - book.xml has Docbook validity issues (again)
* [HBASE-11481] - TableSnapshotInputFormat javadoc wrongly claims HBase "enforces security"
* [HBASE-11487] - ScanResponse carries non-zero cellblock for CloseScanRequest (ScanRequest with close_scanner = true)
* [HBASE-11488] - cancelTasks in SubprocedurePool can hang during task error
* [HBASE-11489] - ClassNotFoundException while running IT tests in trunk using 'mvn verify'
* [HBASE-11492] - Hadoop configuration overrides some ipc parameters including tcpNoDelay
* [HBASE-11493] - Autorestart option is not working because of stale znode "shutdown"
* [HBASE-11496] - HBASE-9745 broke cygwin CLASSPATH translation
* [HBASE-11502] - Track down broken images in Ref Guide
* [HBASE-11505] - 'snapshot' shell command shadows 'snapshot' shell when 'help' is invoked
* [HBASE-11506] - IntegrationTestWithCellVisibilityLoadAndVerify allow User to be passed as arg
* [HBASE-11509] - Forward port HBASE-11039 to trunk and branch-1 after HBASE-11489
* [HBASE-11510] - Visibility serialization format tag gets duplicated in Append/Increment'ed cells
* [HBASE-11514] - Fix findbugs warnings in blockcache
* [HBASE-11517] - TestReplicaWithCluster turns zombie
* [HBASE-11518] - doc update for how to create non-shared HConnection
* [HBASE-11523] - JSON serialization of PE Options is broke
* [HBASE-11525] - Region server holding in region states is out of sync with meta
* [HBASE-11527] - Cluster free memory limit check should consider L2 block cache size also when L2 cache is onheap.
* [HBASE-11530] - RegionStates adds regions to wrong servers
* [HBASE-11531] - RegionStates for regions under region-in-transition znode are not updated on startup
* [HBASE-11534] - Remove broken JAVA_HOME autodetection in hbase-config.sh
* [HBASE-11535] - ReplicationPeer map is not thread safe
* [HBASE-11536] - Puts of region location to Meta may be out of order which causes inconsistent of region location
* [HBASE-11537] - Avoid synchronization on instances of ConcurrentMap
* [HBASE-11540] - Document HBASE-11474
* [HBASE-11541] - Wrong result when scaning meta with startRow
* [HBASE-11545] - mapred.TableSnapshotInputFormat is missing InterfaceAudience annotation
* [HBASE-11550] - Custom value for BUCKET_CACHE_BUCKETS_KEY should be sorted
* [HBASE-11551] - BucketCache$WriterThread.run() doesn't handle exceptions correctly
* [HBASE-11554] - Remove Reusable poolmap Rpc client type.
* [HBASE-11555] - TableSnapshotRegionSplit should be public
* [HBASE-11558] - Caching set on Scan object gets lost when using TableMapReduceUtil in 0.95+
* [HBASE-11561] - deprecate ImmutableBytesWritable.getSize and replace with getLength
* [HBASE-11564] - Improve cancellation management in the rpc layer
* [HBASE-11565] - Stale connection could stay for a while
* [HBASE-11575] - Pseudo distributed mode does not work as documented
* [HBASE-11579] - CopyTable should check endtime value only if != 0
* [HBASE-11582] - Fix Javadoc warning in DataInputInputStream and CacheConfig
* [HBASE-11586] - HFile's HDFS op latency sampling code is not used
* [HBASE-11588] - RegionServerMetricsWrapperRunnable misused the 'period' parameter
* [HBASE-11589] - AccessControlException should be a not retriable exception
* [HBASE-11591] - Scanner fails to retrieve KV from bulk loaded file with highest sequence id than the cell's mvcc in a non-bulk loaded file
* [HBASE-11593] - TestCacheConfig failing consistently in precommit builds
* [HBASE-11594] - Unhandled NoNodeException in distributed log replay mode
* [HBASE-11603] - Apply version of HADOOP-8027 to our JMXJsonServlet
* [HBASE-11609] - LoadIncrementalHFiles fails if the namespace is specified
* [HBASE-11617] - incorrect AgeOfLastAppliedOp and AgeOfLastShippedOp in replication Metrics when no new replication OP
* [HBASE-11620] - Record the class name of Writer in WAL header so that only proper Reader can open the WAL file
* [HBASE-11627] - RegionSplitter's rollingSplit terminated with "/ by zero", and the _balancedSplit file was not deleted properly
* [HBASE-11632] - Region split needs to clear force split flag at the end of SplitRequest run
* [HBASE-11659] - Region state RPC call is not idempotent
* [HBASE-11662] - Launching shell with long-form --debug fails
* [HBASE-11668] - Re-add HBASE_LIBRARY_PATH to bin/hbase
* [HBASE-11671] - TestEndToEndSplitTransaction fails on master
* [HBASE-11678] - BucketCache ramCache fills heap after running a few hours
* [HBASE-11687] - No need to abort on postOpenDeployTasks exception if region opening is cancelled
* [HBASE-11703] - Meta region state could be corrupted
* [HBASE-11705] - callQueueSize should be decremented in a fail-fast scenario
* [HBASE-11708] - RegionSplitter incorrectly calculates splitcount
* [HBASE-11709] - TestMasterShutdown can fail sometime
* [HBASE-11716] - LoadTestDataGeneratorWithVisibilityLabels should handle Delete mutations
* [HBASE-11717] - Remove unused config 'hbase.offheapcache.percentage' from hbase-default.xml and book
* [HBASE-11718] - Remove some logs in RpcClient.java
* [HBASE-11719] - Remove some unused paths in AsyncClient
* [HBASE-11725] - Backport failover checking change to 1.0
* [HBASE-11726] - Master should fail-safe if starting with a pre 0.96 layout
* [HBASE-11727] - Assignment wait time error in case of ServerNotRunningYetException
* [HBASE-11728] - Data loss while scanning using PREFIX_TREE DATA-BLOCK-ENCODING
* [HBASE-11733] - Avoid copy-paste in Master/Region CoprocessorHost
* [HBASE-11744] - RpcServer code should not use a collection from netty internal
* [HBASE-11745] - FilterAllFilter should return ReturnCode.SKIP
* [HBASE-11755] - VisibilityController returns the wrong value for preBalanceSwitch()
* [HBASE-11766] - Backdoor CoprocessorHConnection is no longer being used for local writes
* [HBASE-11770] - TestBlockCacheReporting.testBucketCache is not stable
* [HBASE-11772] - Bulk load mvcc and seqId issues with native hfiles
* [HBASE-11773] - Wrong field used for protobuf construction in RegionStates.
* [HBASE-11782] - Document that hbase.MetaMigrationConvertingToPB needs to be set to true for migrations pre 0.96
* [HBASE-11787] - TestRegionLocations is not categorized
* [HBASE-11788] - hbase is not deleting the cell when a Put with a KeyValue, KeyValue.Type.Delete is submitted
* [HBASE-11789] - LoadIncrementalHFiles is not picking up the -D option
* [HBASE-11794] - StripeStoreFlusher causes NullPointerException
* [HBASE-11797] - Create Table interface to replace HTableInterface
* [HBASE-11802] - Scan copy constructor doesn't copy reversed member variable
* [HBASE-11813] - CellScanner#advance may overflow stack
* [HBASE-11814] - TestAssignmentManager.testCloseFailed() and testOpenCloseRacing() is flaky
* [HBASE-11816] - Initializing custom Metrics implementation failed in Mapper or Reducer
* [HBASE-11820] - ReplicationSource : Set replication codec class as RPC codec class on a clonned Configuration
* [HBASE-11823] - Cleanup javadoc warnings.
* [HBASE-11832] - maven release plugin overrides command line arguments
* [HBASE-11836] - IntegrationTestTimeBoundedMultiGetRequestsWithRegionReplicas tests simple get by default
* [HBASE-11839] - TestRegionRebalance is flakey
* [HBASE-11844] - region_mover.rb load enters an infinite loop if region already present on target server
* [HBASE-11851] - RpcClient can try to close a connection not ready to close
* [HBASE-11856] - hbase-common needs a log4j.properties resource for handling unit test logging output
* [HBASE-11857] - Restore ReaderBase.initAfterCompression() and WALCellCodec.create(Configuration, CompressionContext)
* [HBASE-11859] - 'hadoop jar' references in documentation should mention hbase-server.jar, not hbase.jar
* [HBASE-11863] - WAL files are not archived and stays in the WAL directory after splitting
* [HBASE-11876] - RegionScanner.nextRaw(...) should not update metrics
* [HBASE-11878] - TestVisibilityLabelsWithDistributedLogReplay#testAddVisibilityLabelsOnRSRestart sometimes fails due to VisibilityController not yet initialized
* [HBASE-11880] - NPE in MasterStatusServlet
* [HBASE-11882] - Row level consistency may not be maintained with bulk load and compaction
* [HBASE-11886] - The creator of the table should have all permissions on the table
* [HBASE-11887] - Memory retention in branch-1; millions of instances of LiteralByteString for column qualifier and value
* [HBASE-11892] - configs contain stale entries
* [HBASE-11893] - RowTooBigException should be in hbase-client module
* [HBASE-11896] - LoadIncrementalHFiles fails in secure mode if the namespace is specified
* [HBASE-11898] - CoprocessorHost.Environment should cache class loader instance
* [HBASE-11905] - Add orca to server UIs and update logo.
* [HBASE-11921] - Minor fixups that come of testing branch-1
* [HBASE-11932] - Stop the html-single from building a html-single of every chapter and cluttering the docbkx directory
* [HBASE-11936] - IsolationLevel must be attribute of a Query not a Scan
* [HBASE-11946] - Get xref and API docs to build properly again
* [HBASE-11947] - NoSuchElementException in balancer for master regions
* [HBASE-11949] - Setting hfile.block.cache.size=0 doesn't actually disable blockcache
* [HBASE-11959] - TestAssignmentManagerOnCluster is flaky
* [HBASE-11972] - The "doAs user" used in the update to hbase:acl table RPC is incorrect
* [HBASE-11976] - Server startcode is not checked for bulk region assignment
* [HBASE-11984] - TestClassFinder failing on occasion
* [HBASE-11989] - IntegrationTestLoadAndVerify cannot be configured anymore on distributed mode
** Improvement
* [HBASE-2217] - VM OPTS for shell only
* [HBASE-3270] - When we create the .version file, we should create it in a tmp location and then move it into place
* [HBASE-4163] - Create Split Strategy for YCSB Benchmark
* [HBASE-4495] - CatalogTracker has an identity crisis; needs to be cut-back in scope
* [HBASE-5349] - Automagically tweak global memstore and block cache sizes based on workload
* [HBASE-5923] - Cleanup checkAndXXX logic
* [HBASE-6626] - Add a chapter on HDFS in the troubleshooting section of the HBase reference guide.
* [HBASE-6990] - Pretty print TTL
* [HBASE-7088] - Duplicate code in RowCounter
* [HBASE-7849] - Provide administrative limits around bulkloads of files into a single region
* [HBASE-7910] - Dont use reflection for security
* [HBASE-7987] - Snapshot Manifest file instead of multiple empty files
* [HBASE-8076] - add better doc for HBaseAdmin#offline API.
* [HBASE-8298] - In shell, provide alias of 'desc' for 'describe'
* [HBASE-8315] - Documentation should have more information of LRU Stats
* [HBASE-8332] - Add truncate as HMaster method
* [HBASE-8495] - Change ownership of the directory to bulk load
* [HBASE-8604] - improve reporting of incorrect peer address in replication
* [HBASE-8755] - A new write thread model for HLog to improve the overall HBase write throughput
* [HBASE-8763] - Combine MVCC and SeqId
* [HBASE-8807] - HBase MapReduce Job-Launch Documentation Misplaced
* [HBASE-8970] - [book] Filter language documentation is hidden
* [HBASE-9343] - Implement stateless scanner for Stargate
* [HBASE-9345] - Add support for specifying filters in scan
* [HBASE-9426] - Make custom distributed barrier procedure pluggable
* [HBASE-9501] - Provide throttling for replication
* [HBASE-9524] - Multi row get does not return any results even if any one of the rows specified in the query is missing and improve exception handling
* [HBASE-9542] - Have Get and MultiGet do cellblocks, currently they are pb all the time
* [HBASE-9829] - make the compaction logging less confusing
* [HBASE-9857] - Blockcache prefetch option
* [HBASE-9866] - Support the mode where REST server authorizes proxy users
* [HBASE-9892] - Add info port to ServerName to support multi instances in a node
* [HBASE-9999] - Add support for small reverse scan
* [HBASE-10010] - eliminate the put latency spike on the new log file beginning
* [HBASE-10048] - Add hlog number metric in regionserver
* [HBASE-10074] - consolidate and improve capacity/sizing documentation
* [HBASE-10086] - [book] document the HBase canary tool usage in the HBase Book
* [HBASE-10116] - SlabCache metrics improvements
* [HBASE-10128] - Improve the copy table doc to include information about versions
* [HBASE-10141] - instead of putting expired store files thru compaction, just archive them
* [HBASE-10157] - Provide CP hook post log replay
* [HBASE-10164] - Allow heapsize of different units to be passed as HBASE_HEAPSIZE
* [HBASE-10173] - Need HFile version check in security coprocessors
* [HBASE-10175] - 2-thread ChaosMonkey steps on its own toes
* [HBASE-10202] - Documentation is lacking information about rolling-restart.sh script.
* [HBASE-10211] - Improve AccessControl documentation in hbase book
* [HBASE-10213] - Add read log size per second metrics for replication source
* [HBASE-10228] - Support setCellVisibility and setAuthorizations in Shell
* [HBASE-10229] - Support OperationAttributes in Increment and Append in Shell
* [HBASE-10239] - Improve determinism and debugability of TestAccessController
* [HBASE-10252] - Don't write back to WAL/memstore when Increment amount is zero (mostly for query rather than update intention)
* [HBASE-10263] - make LruBlockCache single/multi/in-memory ratio user-configurable and provide preemptive mode for in-memory type block
* [HBASE-10265] - Upgrade to commons-logging 1.1.3
* [HBASE-10277] - refactor AsyncProcess
* [HBASE-10289] - Avoid random port usage by default JMX Server. Create Custome JMX server
* [HBASE-10323] - Auto detect data block encoding in HFileOutputFormat
* [HBASE-10324] - refactor deferred-log-flush/Durability related interface/code/naming to align with changed semantic of the new write thread model
* [HBASE-10331] - Insure security tests use SecureTestUtil methods for grants
* [HBASE-10344] - Improve write performance by ignoring sync to hdfs when an asyncer's writes have been synced by other asyncer
* [HBASE-10346] - Add Documentation for stateless scanner
* [HBASE-10368] - Add Mutation.setWriteToWAL() back to 0.98
* [HBASE-10373] - Add more details info for ACL group in HBase book
* [HBASE-10389] - Add namespace help info in table related shell commands
* [HBASE-10395] - endTime won't be set in VerifyReplication if startTime is not set
* [HBASE-10419] - Add multiget support to PerformanceEvaluation
* [HBASE-10423] - Report back the message of split or rollback failure to the master
* [HBASE-10427] - clean up HRegionLocation/ServerName usage
* [HBASE-10430] - Support compressTags in shell for enabling tag encoding
* [HBASE-10471] - Remove HTD.isAsyncLogFlush() from trunk
* [HBASE-10479] - HConnection interface is public but is used internally, and contains a bunch of methods
* [HBASE-10487] - Avoid allocating new KeyValue and according bytes-copying for appended kvs which don't have existing values
* [HBASE-10498] - Add new APIs to load balancer interface
* [HBASE-10511] - Add latency percentiles on PerformanceEvaluation
* [HBASE-10518] - DirectMemoryUtils.getDirectMemoryUsage spams when none is configured
* [HBASE-10569] - Co-locate meta and master
* [HBASE-10570] - Allow overrides of Surefire secondPartForkMode and testFailureIgnore
* [HBASE-10589] - Reduce unnecessary TestRowProcessorEndpoint resource usage
* [HBASE-10590] - Update contents about tracing in the Reference Guide
* [HBASE-10591] - Sanity check table configuration in createTable
* [HBASE-10592] - Refactor PerformanceEvaluation tool
* [HBASE-10597] - IOEngine#read() should return the number of bytes transferred
* [HBASE-10599] - Replace System.currentMillis() with EnvironmentEdge.currentTimeMillis in memstore flusher and related places
* [HBASE-10603] - Deprecate RegionSplitter CLI tool
* [HBASE-10615] - Make LoadIncrementalHFiles skip reference files
* [HBASE-10638] - Improve error message when there is no region server available for move
* [HBASE-10641] - Configurable Bucket Sizes in bucketCache
* [HBASE-10663] - Some code cleanup of class Leases and ScannerListener.leaseExpired
* [HBASE-10678] - Make verifyrep tool implement toolrunner
* [HBASE-10690] - Drop Hadoop-1 support
* [HBASE-10693] - Correct declarations of Atomic* fields from 'volatile' to 'final'
* [HBASE-10744] - AM#CloseRegion no need to retry on FailedServerException
* [HBASE-10746] - Bump the version of HTrace to 3.0
* [HBASE-10752] - Port HBASE-10270 'Remove DataBlockEncoding from BlockCacheKey' to trunk
* [HBASE-10769] - hbase/bin/hbase-cleanup.sh has wrong usage string
* [HBASE-10771] - Primitive type put/get APIs in ByteRange
* [HBASE-10785] - Metas own location should be cached
* [HBASE-10788] - Add 99th percentile of latency in PE
* [HBASE-10797] - Add support for -h and --help to rolling_restart.sh and fix the usage string output
* [HBASE-10813] - Possible over-catch of exceptions
* [HBASE-10823] - Resolve LATEST_TIMESTAMP to current server time before scanning for ACLs
* [HBASE-10835] - DBE encode path improvements
* [HBASE-10842] - Some loggers not declared static final
* [HBASE-10861] - Extend ByteRange to create Mutable and Immutable ByteRange
* [HBASE-10871] - Indefinite OPEN/CLOSE wait on busy RegionServers
* [HBASE-10873] - Control number of regions assigned to backup masters
* [HBASE-10883] - Restrict the universe of labels and authorizations
* [HBASE-10884] - [REST] Do not disable block caching when scanning
* [HBASE-10885] - Support visibility expressions on Deletes
* [HBASE-10887] - tidy ThriftUtilities format
* [HBASE-10892] - [Shell] Add support for globs in user_permission
* [HBASE-10902] - Make Secure Bulk Load work across remote secure clusters
* [HBASE-10911] - ServerShutdownHandler#toString shows meaningless message
* [HBASE-10916] - [VisibilityController] Stackable ScanLabelGenerators
* [HBASE-10923] - Control where to put meta region
* [HBASE-10925] - Do not OOME, throw RowTooBigException instead
* [HBASE-10926] - Use global procedure to flush table memstore cache
* [HBASE-10934] - Provide Admin interface to abstract HBaseAdmin
* [HBASE-10950] - Add a configuration point for MaxVersion of Column Family
* [HBASE-10951] - Use PBKDF2 to generate test encryption keys in the shell
* [HBASE-10952] - [REST] Let the user turn off block caching if desired
* [HBASE-10960] - Enhance HBase Thrift 1 to include "append" and "checkAndPut" operations
* [HBASE-10984] - Add description about setting up htrace-zipkin to documentation
* [HBASE-11000] - Add autoflush option to PerformanceEvaluation
* [HBASE-11001] - Shell support for granting cell permissions for testing
* [HBASE-11002] - Shell support for changing cell visibility for testing
* [HBASE-11004] - Extend traces through FSHLog#sync
* [HBASE-11007] - BLOCKCACHE in schema descriptor seems not aptly named
* [HBASE-11008] - Align bulk load, flush, and compact to require Action.CREATE
* [HBASE-11026] - Provide option to filter out all rows in PerformanceEvaluation tool
* [HBASE-11044] - [Shell] Show groups for user in 'whoami' output
* [HBASE-11047] - Remove TimeoutMontior
* [HBASE-11048] - Support setting custom priority per client RPC
* [HBASE-11068] - Update code to use Admin factory method instead of constructor
* [HBASE-11074] - Have PE emit histogram stats as it runs rather than dump once at end of test
* [HBASE-11083] - ExportSnapshot should provide capability to limit bandwidth consumption
* [HBASE-11086] - Add htrace support for PerfEval
* [HBASE-11119] - Update ExportSnapShot to optionally not use a tmp file on external file system
* [HBASE-11123] - Upgrade instructions from 0.94 to 0.98
* [HBASE-11126] - Add RegionObserver pre hooks that operate under row lock
* [HBASE-11128] - Add -target option to ExportSnapshot to export with a different name
* [HBASE-11134] - Add a -list-snapshots option to SnapshotInfo
* [HBASE-11136] - Add permission check to roll WAL writer
* [HBASE-11137] - Add mapred.TableSnapshotInputFormat
* [HBASE-11151] - move tracing modules from hbase-server to hbase-common
* [HBASE-11167] - Avoid usage of java.rmi package Exception in MemStore
* [HBASE-11201] - Enable global procedure members to return values to procedure master
* [HBASE-11211] - LoadTestTool option for specifying number of regions per server
* [HBASE-11219] - HRegionServer#createRegionLoad() should reuse RegionLoad.Builder instance when called in a loop
* [HBASE-11220] - Add listeners to ServerManager and AssignmentManager
* [HBASE-11240] - Print hdfs pipeline when hlog's sync is slow
* [HBASE-11259] - Compression.java different compressions load system classpath differently causing errors
* [HBASE-11304] - Enable HBaseAdmin.execProcedure to return data from procedure execution
* [HBASE-11305] - Remove bunch of unused imports in HConnectionManager
* [HBASE-11315] - Keeping MVCC for configurable longer time
* [HBASE-11319] - No need to use favored node mapping initialization to find all regions
* [HBASE-11326] - Use an InputFormat for ExportSnapshot
* [HBASE-11331] - [blockcache] lazy block decompression
* [HBASE-11344] - Hide row keys and such from the web UIs
* [HBASE-11348] - Make frequency and sleep times of chaos monkeys configurable
* [HBASE-11349] - [Thrift] support authentication/impersonation
* [HBASE-11350] - [PE] Allow random value size
* [HBASE-11355] - a couple of callQueue related improvements
* [HBASE-11362] - Minor improvements to LoadTestTool and PerformanceEvaluation
* [HBASE-11370] - SSH doesn't need to scan meta if not using ZK for assignment
* [HBASE-11376] - Presplit table in IntegrationTestBigLinkedList's Generator tool
* [HBASE-11390] - PerformanceEvaluation: add an option to use a single connection
* [HBASE-11398] - Print the stripes' state with file size info
* [HBASE-11407] - hbase-client should not require Jackson for pure HBase queries be executed
* [HBASE-11415] - [PE] Dump config before running test
* [HBASE-11421] - HTableInterface javadoc correction
* [HBASE-11434] - [AccessController] Disallow inbound cells with reserved tags
* [HBASE-11436] - Support start Row and stop Row in HBase Export
* [HBASE-11437] - Modify cell tag handling code to treat the length as unsigned
* [HBASE-11438] - [Visibility Controller] Support UTF8 character as Visibility Labels
* [HBASE-11440] - Make KeyValueCodecWithTags as the default codec for replication in trunk
* [HBASE-11444] - Remove use of reflection for User#getShortName
* [HBASE-11446] - Reduce the frequency of RNG calls in SecureWALCellCodec#EncryptedKvEncoder
* [HBASE-11450] - Improve file size info in SnapshotInfo tool
* [HBASE-11452] - add getUserPermission feature in AccessControlClient as client API
* [HBASE-11473] - Add BaseWALObserver class
* [HBASE-11474] - [Thrift2] support authentication/impersonation
* [HBASE-11491] - Add an option to sleep randomly during the tests with the PE tool
* [HBASE-11497] - Expose RpcScheduling implementations as LimitedPrivate interfaces
* [HBASE-11513] - Combine SingleMultiple Queue RpcExecutor into a single class
* [HBASE-11516] - Track time spent in executing coprocessors in each region.
* [HBASE-11553] - Abstract visibility label related services into an interface
* [HBASE-11566] - make ExportSnapshot extendable by removing 'final'
* [HBASE-11583] - Refactoring out the configuration changes for enabling VisibilityLabels in the unit tests.
* [HBASE-11623] - mutateRowsWithLocks might require updatesLock.readLock with waitTime=0
* [HBASE-11630] - Refactor TestAdmin to use Admin interface instead of HBaseAdmin
* [HBASE-11631] - Wait a little till server is online in assigning meta
* [HBASE-11649] - Add shortcut commands to bin/hbase for test tools
* [HBASE-11650] - Write hbase.id to a temporary location and move into place
* [HBASE-11657] - Put HTable region methods in an interface
* [HBASE-11664] - Build broken - TestVisibilityWithCheckAuths
* [HBASE-11667] - Comment ClientScanner logic for NSREs.
* [HBASE-11674] - LoadIncrementalHFiles should be more verbose after unrecoverable error
* [HBASE-11679] - Replace "HTable" with "HTableInterface" where backwards-compatible
* [HBASE-11696] - Make CombinedBlockCache resizable.
* [HBASE-11697] - Improve the 'Too many blocks' message on UI blockcache status page
* [HBASE-11701] - Start and end of memstore flush log should be on the same level
* [HBASE-11702] - Better introspection of long running compactions
* [HBASE-11706] - Set versions for VerifyReplication
* [HBASE-11731] - Add option to only run a subset of the shell tests
* [HBASE-11748] - Cleanup and add pool usage tracing to Compression
* [HBASE-11749] - Better error logging when coprocessors loading has failed.
* [HBASE-11754] - [Shell] Record table property SPLITS_FILE in descriptor
* [HBASE-11757] - Provide a common base abstract class for both RegionObserver and MasterObserver
* [HBASE-11774] - Avoid allocating unnecessary tag iterators
* [HBASE-11777] - Find a way to set sequenceId on Cells on the server
* [HBASE-11790] - Bulk load should use HFileOutputFormat2 in all cases
* [HBASE-11805] - KeyValue to Cell Convert in WALEdit APIs
* [HBASE-11810] - Access SSL Passwords through Credential Provider API
* [HBASE-11821] - [ImportTSV] Abstract labels tags creation into pluggable Interface
* [HBASE-11825] - Create Connection and ConnectionManager
* [HBASE-11826] - Split each tableOrRegionName admin methods into two targetted methods
* [HBASE-11828] - callers of SeverName.valueOf should use equals and not ==
* [HBASE-11845] - HFile tool should implement Tool, disable blockcache by default
* [HBASE-11846] - HStore#assertBulkLoadHFileOk should log if a full HFile verification will be performed during a bulkload
* [HBASE-11847] - HFile tool should be able to print block headers
* [HBASE-11865] - Result implements CellScannable; rather it should BE a CellScanner
* [HBASE-11873] - Hbase Version CLI enhancement
* [HBASE-11877] - Make TableSplit more readable
* [HBASE-11891] - Introduce HBaseInterfaceAudience level to denote class names that appear in configs.
* [HBASE-11897] - Add append and remove peer table-cfs cmds for replication
** New Feature
* [HBASE-4089] - blockCache contents report
* [HBASE-6104] - Require EXEC permission to call coprocessor endpoints
* [HBASE-7667] - Support stripe compaction
* [HBASE-7840] - Enhance the java it framework to start & stop a distributed hbase & hadoop cluster
* [HBASE-8751] - Enable peer cluster to choose/change the ColumnFamilies/Tables it really want to replicate from a source cluster
* [HBASE-9047] - Tool to handle finishing replication when the cluster is offline
* [HBASE-10119] - Allow HBase coprocessors to clean up when they fail
* [HBASE-10151] - No-op HeapMemoryTuner
* [HBASE-10416] - Improvements to the import flow
* [HBASE-10881] - Support reverse scan in thrift2
* [HBASE-10935] - support snapshot policy where flush memstore can be skipped to prevent production cluster freeze
* [HBASE-11724] - Add to RWQueueRpcExecutor the ability to split get and scan handlers
* [HBASE-11885] - Provide a Dockerfile to easily build and run HBase from source
* [HBASE-11909] - Region count listed by HMaster UI and hbck are different
** Task
* [HBASE-4456] - [doc] Add a section about RS failover
* [HBASE-4920] - We need a mascot, a totem
* [HBASE-5697] - Audit HBase for usage of deprecated hadoop 0.20.x property names.
* [HBASE-6139] - Add troubleshooting section for CentOS 6.2 page allocation failure issue
* [HBASE-6192] - Document ACL matrix in the book
* [HBASE-7394] - Document security config requirements from HBASE-7357
* [HBASE-8035] - Add site target check to precommit tests
* [HBASE-8844] - Document the removal of replication state AKA start/stop_replication
* [HBASE-9580] - Document the meaning of @InterfaceAudience in hbase ref guide
* [HBASE-9733] - Book should have individual Disqus comment per page
* [HBASE-9875] - NamespaceJanitor chore is not used
* [HBASE-10134] - Fix findbug warning in VisibilityController
* [HBASE-10159] - Replaced deprecated interface Closeable
* [HBASE-10206] - Explain tags in the hbase book
* [HBASE-10246] - Wrap long lines in recently added source files
* [HBASE-10364] - Allow configuration option for parent znode in LoadTestTool
* [HBASE-10388] - Add export control notice in README
* [HBASE-10439] - Document how to configure REST server impersonation
* [HBASE-10473] - Add utility for adorning http Context
* [HBASE-10601] - Upgrade hadoop dependency to 2.3.0 release
* [HBASE-10609] - Remove filterKeyValue(Cell ignored) from FilterBase
* [HBASE-10612] - Remove unnecessary dependency on org.eclipse.jdt:core
* [HBASE-10670] - HBaseFsck#connect() should use new connection
* [HBASE-10700] - IntegrationTestWithCellVisibilityLoadAndVerify should allow current user to be the admin
* [HBASE-10740] - Upgrade zookeeper to 3.4.6 release
* [HBASE-10786] - If snapshot verification fails with 'Regions moved', the message should contain the name of region causing the failure
* [HBASE-10787] - TestHCM#testConnection* take too long
* [HBASE-10821] - Make ColumnInterpreter#getValue() abstract
* [HBASE-10824] - Enhance detection of protobuf generated code in line length check
* [HBASE-10889] - test-patch.sh should exclude thrift generated code from long line detection
* [HBASE-10906] - Change error log for NamingException in TableInputFormatBase to WARN level
* [HBASE-10912] - setUp / tearDown in TestSCVFWithMiniCluster should be done once per run
* [HBASE-10956] - Upgrade hadoop-2 dependency to 2.4.0
* [HBASE-11016] - Remove Filter#filterRow(List)
* [HBASE-11032] - Replace deprecated methods in FileSystem with their replacements
* [HBASE-11050] - Replace empty catch block in TestHLog#testFailedToCreateHLogIfParentRenamed with @Test(expected=)
* [HBASE-11076] - Update refguide on getting 0.94.x to run on hadoop 2.2.0+
* [HBASE-11090] - Backport HBASE-11083 ExportSnapshot should provide capability to limit bandwidth consumption
* [HBASE-11107] - Provide utility method equivalent to 0.92's Result.getBytes().getSize()
* [HBASE-11154] - Document how to use Reverse Scan API
* [HBASE-11199] - One-time effort to pretty-print the Docbook XML, to make further patch review easier
* [HBASE-11203] - Clean up javadoc and findbugs warnings in trunk
* [HBASE-11204] - Document bandwidth consumption limit feature for ExportSnapshot
* [HBASE-11227] - Mention 8- and 16-bit fixed-with encodings in OrderedBytes docstring
* [HBASE-11230] - Remove getRowOrBefore from HTableInterface and HTable
* [HBASE-11317] - Expand unit testing to cover Mockito and MRUnit and give more examples
* [HBASE-11364] - [BlockCache] Add a flag to cache data blocks in L1 if multi-tier cache
* [HBASE-11600] - DataInputputStream and DoubleOutputStream are no longer being used
* [HBASE-11604] - Disable co-locating meta/master by default
* [HBASE-11621] - Make MiniDFSCluster run faster
* [HBASE-11666] - Enforce JDK7 javac for builds on branch-1 and master
* [HBASE-11682] - Explain hotspotting
* [HBASE-11723] - Document all options of bin/hbase command
* [HBASE-11735] - Document Configurable Bucket Sizes in bucketCache
* [HBASE-11762] - Record the class name of Codec in WAL header
* [HBASE-11800] - Coprocessor service methods in HTableInterface should be annotated public
* [HBASE-11849] - Clean up orphaned private audience classes
* [HBASE-11858] - Audit regionserver classes that are missing InterfaceAudience
** Test
* [HBASE-8889] - TestIOFencing#testFencingAroundCompaction occasionally fails
* [HBASE-9928] - TestHRegion should clean up test-data directory upon completion
* [HBASE-9953] - PerformanceEvaluation: Decouple data size from client concurrency
* [HBASE-10044] - test-patch.sh should accept documents by known file extensions
* [HBASE-10130] - TestSplitLogManager#testTaskResigned fails sometimes
* [HBASE-10180] - TestByteBufferIOEngine#testByteBufferIOEngine occasionally fails
* [HBASE-10189] - Intermittent TestReplicationSyncUpTool failure
* [HBASE-10301] - TestAssignmentManagerOnCluster#testOpenCloseRacing fails intermittently
* [HBASE-10377] - Add test for HBASE-10370 Compaction in out-of-date Store causes region split failure
* [HBASE-10394] - Test for Replication with tags
* [HBASE-10406] - Column family option is not effective in IntegrationTestSendTraceRequests
* [HBASE-10408] - Intermittent TestDistributedLogSplitting#testLogReplayForDisablingTable failure
* [HBASE-10440] - integration tests fail due to nonce collisions
* [HBASE-10465] - TestZKPermissionsWatcher.testPermissionsWatcher fails sometimes
* [HBASE-10475] - TestRegionServerCoprocessorExceptionWithAbort may timeout due to concurrent lease removal
* [HBASE-10480] - TestLogRollPeriod#testWithEdits may fail due to insufficient waiting
* [HBASE-10543] - Two rare test failures with TestLogsCleaner and TestSplitLogWorker
* [HBASE-10635] - thrift#TestThriftServer fails due to TTL validity check
* [HBASE-10649] - TestMasterMetrics fails occasionally
* [HBASE-10764] - TestLoadIncrementalHFilesSplitRecovery#testBulkLoadPhaseFailure takes too long
* [HBASE-10767] - Load balancer may interfere with tests in TestHBaseFsck
* [HBASE-10774] - Restore TestMultiTableInputFormat
* [HBASE-10782] - Hadoop2 MR tests fail occasionally because of mapreduce.jobhistory.address is no set in job conf
* [HBASE-10828] - TestRegionObserverInterface#testHBase3583 should wait for all regions to be assigned
* [HBASE-10852] - TestDistributedLogSplitting#testDisallowWritesInRecovering occasionally fails
* [HBASE-10867] - TestRegionPlacement#testRegionPlacement occasionally fails
* [HBASE-10868] - TestAtomicOperation should close HRegion instance after each subtest
* [HBASE-10988] - Properly wait for server in TestThriftServerCmdLine
* [HBASE-11010] - TestChangingEncoding is unnecessarily slow
* [HBASE-11019] - incCount() method should be properly stubbed in HConnectionTestingUtility#getMockedConnectionAndDecorate()
* [HBASE-11037] - Race condition in TestZKBasedOpenCloseRegion
* [HBASE-11051] - checkJavacWarnings in test-patch.sh should bail out early if there is compilation error
* [HBASE-11057] - Improve TestShell coverage of grant and revoke comamnds
* [HBASE-11104] - IntegrationTestImportTsv#testRunFromOutputCommitter misses credential initialization
* [HBASE-11152] - test-patch.sh should be able to handle the case where $TERM is not defined
* [HBASE-11166] - Categorize tests in hbase-prefix-tree module
* [HBASE-11328] - testMoveRegion could fail
* [HBASE-11345] - Add an option not to restore cluster after an IT test
* [HBASE-11375] - Validate compile-protobuf profile in test-patch.sh
* [HBASE-11404] - TestLogLevel should stop the server at the end
* [HBASE-11443] - TestIOFencing#testFencingAroundCompactionAfterWALSync times out
* [HBASE-11615] - TestZKLessAMOnCluster.testForceAssignWhileClosing failed on Jenkins
* [HBASE-11713] - Adding hbase shell unit test coverage for visibility labels.
* [HBASE-11918] - TestVisibilityLabelsWithDistributedLogReplay#testAddVisibilityLabelsOnRSRestart sometimes fails due to VisibilityController initialization not being recognized
* [HBASE-11942] - Fix TestHRegionBusyWait
* [HBASE-11966] - Minor error in TestHRegion.testCheckAndMutate_WithCorrectValue()
** Umbrella
* [HBASE-7319] - Extend Cell usage through read path
* [HBASE-9945] - Coprocessor loading and execution improvements
* [HBASE-10909] - Abstract out ZooKeeper usage in HBase - phase 1
```
Reference in New Issue View Git Blame Copy Permalink