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Posted to commits@hbase.apache.org by st...@apache.org on 2018/08/28 03:12:19 UTC
svn commit: r28986 [2/4] - /dev/hbase/hbase-2.0.2RC0/
Added: dev/hbase/hbase-2.0.2RC0/CHANGES.md
==============================================================================
--- dev/hbase/hbase-2.0.2RC0/CHANGES.md (added)
+++ dev/hbase/hbase-2.0.2RC0/CHANGES.md Tue Aug 28 03:12:19 2018
@@ -0,0 +1,6365 @@
+# 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.
+
+
+
+CHANGES.md and RELEASENOTES.md were generated using yetus releasedocmaker.
+
+First make sure what is in JIRA agrees with what is in git and vice-versa
+(See HBASE-14025 for original exposition on how to do this followed by
+the travails of various release managers. See also HBASE-18828 for a
+deriviative makes the move to yetus releasedocmaker).
+
+Then make sure that anything in current release as noted in JIRA has
+not made it out in earlier major/minor (see HBASE-14025 for how to
+reconcile which).
+
+Obtain a yetus release (see HBASE-18828 for some help). To run
+releasedocmaker, do as follows (below example is for hbase-2.0.0):
+
+ $ ./release-doc-maker/releasedocmaker.py -p HBASE --fileversions \
+ -v 2.0.0 -l --sortorder=newer --skip-credits
+
+Rename the output as CHANGES.md and RELEASENOTES.md. Edit both to put
+document title above the apache license so markdown readers work. You
+may have to bulk import old-style CHANGES.txt on to the end in a code
+comment to preserve continuity of the CHANGELOG.
+-->
+
+## Release 2.0.2 - Unreleased (as of 2018-08-27)
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-20884](https://issues.apache.org/jira/browse/HBASE-20884) | Replace usage of our Base64 implementation with java.util.Base64 | Major | . |
+| [HBASE-20691](https://issues.apache.org/jira/browse/HBASE-20691) | Storage policy should allow deferring to HDFS | Blocker | Filesystem Integration, wal |
+
+
+### 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 |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-20387](https://issues.apache.org/jira/browse/HBASE-20387) | flaky infrastructure should work for all branches | Critical | test |
+| [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-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-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-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-20733](https://issues.apache.org/jira/browse/HBASE-20733) | QABot should run checkstyle tests if the checkstyle configs change | Minor | build, community |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-21120](https://issues.apache.org/jira/browse/HBASE-21120) | MoveRegionProcedure makes no progress; goes to STUCK | Major | amv2 |
+| [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-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-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-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-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-21029](https://issues.apache.org/jira/browse/HBASE-21029) | Miscount of memstore's heap/offheap size if same cell was put | Major | . |
+| [HBASE-20981](https://issues.apache.org/jira/browse/HBASE-20981) | Rollback stateCount accounting thrown-off when exception out of rollbackState | Major | amv2 |
+| [HBASE-21018](https://issues.apache.org/jira/browse/HBASE-21018) | RS crashed because AsyncFS was unable to update HDFS data encryption key | Critical | wal |
+| [HBASE-21007](https://issues.apache.org/jira/browse/HBASE-21007) | Memory leak in HBase rest server | Critical | REST |
+| [HBASE-20924](https://issues.apache.org/jira/browse/HBASE-20924) | Backport "HBASE-20846 Restore procedure locks when master restarts" | Major | amv2 |
+| [HBASE-20871](https://issues.apache.org/jira/browse/HBASE-20871) | Backport HBASE-20847 to branch-2.0: "The parent procedure of RegionTransitionProcedure may not have the table lock" | Critical | amv2 |
+| [HBASE-20829](https://issues.apache.org/jira/browse/HBASE-20829) | Remove the addFront assertion in MasterProcedureScheduler.doAdd | Major | Replication |
+| [HBASE-20996](https://issues.apache.org/jira/browse/HBASE-20996) | Backport to branch-2.0 HBASE-20722 "Make RegionServerTracker only depend on children changed event" | Major | . |
+| [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-20565](https://issues.apache.org/jira/browse/HBASE-20565) | ColumnRangeFilter combined with ColumnPaginationFilter can produce incorrect result since 1.4 | Major | Filters |
+| [HBASE-20917](https://issues.apache.org/jira/browse/HBASE-20917) | MetaTableMetrics#stop references uninitialized requestsMap for non-meta region | Major | . |
+| [HBASE-20870](https://issues.apache.org/jira/browse/HBASE-20870) | Wrong HBase root dir in ITBLL's Search Tool | Minor | integration tests |
+| [HBASE-20903](https://issues.apache.org/jira/browse/HBASE-20903) | backport HBASE-20792 "info:servername and info:sn inconsistent for OPEN region" to branch-2.0 | Major | . |
+| [HBASE-20869](https://issues.apache.org/jira/browse/HBASE-20869) | Endpoint-based Export use incorrect user to write to destination | Major | Coprocessors |
+| [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-20854](https://issues.apache.org/jira/browse/HBASE-20854) | Wrong retries number in RpcRetryingCaller's log message | Minor | Client, logging |
+| [HBASE-20822](https://issues.apache.org/jira/browse/HBASE-20822) | TestAsyncNonMetaRegionLocator is flakey | Major | asyncclient |
+| [HBASE-20789](https://issues.apache.org/jira/browse/HBASE-20789) | TestBucketCache#testCacheBlockNextBlockMetadataMissing is flaky | Major | . |
+| [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-20769](https://issues.apache.org/jira/browse/HBASE-20769) | getSplits() has a out of bounds problem in TableSnapshotInputFormatImpl | Major | . |
+| [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-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 |
+| [HBASE-20778](https://issues.apache.org/jira/browse/HBASE-20778) | Make it so WALPE runs on DFS | Major | test |
+| [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-20765](https://issues.apache.org/jira/browse/HBASE-20765) | Move branch-2.0 version to 2.0.2-SNAPSHOT from 2.0.1 | Trivial | . |
+| [HBASE-20681](https://issues.apache.org/jira/browse/HBASE-20681) | IntegrationTestDriver fails after HADOOP-15406 due to missing hamcrest-core | Major | integration tests |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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 | . |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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-21093](https://issues.apache.org/jira/browse/HBASE-21093) | Move TestCreateTableProcedure.testMRegions to a separated file | Major | test |
+| [HBASE-21094](https://issues.apache.org/jira/browse/HBASE-21094) | Remove the explicit timeout config for TestTruncateTableProcedure | Major | test |
+| [HBASE-21050](https://issues.apache.org/jira/browse/HBASE-21050) | Exclusive lock may be held by a SUCCESS state procedure forever | Major | amv2 |
+| [HBASE-21054](https://issues.apache.org/jira/browse/HBASE-21054) | Copy down docs, amend to suite branch-2.0, and then commit | Major | documentation |
+| [HBASE-21046](https://issues.apache.org/jira/browse/HBASE-21046) | Set version to 2.0.2 on branch-2.0 in prep for first RC | Major | . |
+| [HBASE-21044](https://issues.apache.org/jira/browse/HBASE-21044) | Disable flakey TestShell list\_procedures | Major | test |
+| [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-21009](https://issues.apache.org/jira/browse/HBASE-21009) | Backport to branch-2.0 HBASE-20739 "Add priority for SCP" | Major | amv2 |
+| [HBASE-21004](https://issues.apache.org/jira/browse/HBASE-21004) | Backport to branch-2.0 HBASE-20708 "Remove the usage of RecoverMetaProcedure" | Major | amv2 |
+| [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-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-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-20914](https://issues.apache.org/jira/browse/HBASE-20914) | Trim Master memory usage | Major | 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-20887](https://issues.apache.org/jira/browse/HBASE-20887) | Backport HBASE-20865 "CreateTableProcedure is stuck in retry loop in CREATE\_TABLE\_WRITE\_FS\_LAYOUT state" | Major | backport |
+| [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-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-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-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-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-20745](https://issues.apache.org/jira/browse/HBASE-20745) | Log when master proc wal rolls | Major | debugging |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-20512](https://issues.apache.org/jira/browse/HBASE-20512) | document change to running tests on secure clusters | Critical | documentation, integration tests, Usability |
+| [HBASE-20989](https://issues.apache.org/jira/browse/HBASE-20989) | Minor, miscellaneous logging fixes | Trivial | logging |
+
+
+## Release 2.0.1 - Released June 20th, 2018
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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 |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-20640](https://issues.apache.org/jira/browse/HBASE-20640) | TestQuotaGlobalsSettingsBypass missing test category and ClassRule | Critical | test |
+| [HBASE-20548](https://issues.apache.org/jira/browse/HBASE-20548) | Master fails to startup on large clusters, refreshing block distribution | Major | . |
+| [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-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 |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [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-20698](https://issues.apache.org/jira/browse/HBASE-20698) | Master don't record right server version until new started region server call regionServerReport method | Major | proc-v2 |
+| [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-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 |
+| [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-20661](https://issues.apache.org/jira/browse/HBASE-20661) | Move version from 2.0.0 to 2.0.1-SNAPSHOT in branch-2.0 | Major | build |
+| [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-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-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-20589](https://issues.apache.org/jira/browse/HBASE-20589) | Don't need to assign meta to a new RS when standby master become active | Major | . |
+| [HBASE-20591](https://issues.apache.org/jira/browse/HBASE-20591) | nightly job doesn't respect maven options | Critical | test |
+| [HBASE-20583](https://issues.apache.org/jira/browse/HBASE-20583) | SplitLogWorker should handle FileNotFoundException when split a wal | Major | . |
+| [HBASE-20571](https://issues.apache.org/jira/browse/HBASE-20571) | JMXJsonServlet generates invalid JSON if it has NaN in metrics | Major | UI |
+| [HBASE-20544](https://issues.apache.org/jira/browse/HBASE-20544) | downstream HBaseTestingUtility fails with invalid port | Blocker | test |
+| [HBASE-20411](https://issues.apache.org/jira/browse/HBASE-20411) | Ameliorate MutableSegment synchronize | Major | . |
+| [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-20554](https://issues.apache.org/jira/browse/HBASE-20554) | "WALs outstanding" message from CleanerChore is noisy | Trivial | . |
+| [HBASE-20521](https://issues.apache.org/jira/browse/HBASE-20521) | TableOutputFormat.checkOutputSpecs conf checking sequence cause pig script run fail | Major | mapreduce |
+| [HBASE-20517](https://issues.apache.org/jira/browse/HBASE-20517) | Fix PerformanceEvaluation 'column' parameter | Major | test |
+| [HBASE-20169](https://issues.apache.org/jira/browse/HBASE-20169) | NPE when calling HBTU.shutdownMiniCluster (TestAssignmentManagerMetrics is flakey) | Critical | test |
+| [HBASE-20514](https://issues.apache.org/jira/browse/HBASE-20514) | On Master restart if table is stuck in DISABLING state, CLOSED regions should not be considered stuck in-transition | Major | amv2 |
+| [HBASE-20476](https://issues.apache.org/jira/browse/HBASE-20476) | Open sequence number could go backwards in AssignProcedure | Major | Region Assignment |
+| [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-18842](https://issues.apache.org/jira/browse/HBASE-18842) | The hbase shell clone\_snaphost command returns bad error message | Minor | shell |
+| [HBASE-20404](https://issues.apache.org/jira/browse/HBASE-20404) | Ugly cleanerchore complaint that dir is not empty | Major | master |
+| [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-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 |
+
+
+### 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-20721](https://issues.apache.org/jira/browse/HBASE-20721) | Set version on branch-2.0 to 2.0.1 in prep for 2.0.1 RC | 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-20483](https://issues.apache.org/jira/browse/HBASE-20483) | [PERFORMANCE] Flushing is 2x slower in hbase2. | Major | Performance |
+| [HBASE-20702](https://issues.apache.org/jira/browse/HBASE-20702) | Processing crash, skip ONLINE'ing empty rows | Major | amv2 |
+| [HBASE-20628](https://issues.apache.org/jira/browse/HBASE-20628) | SegmentScanner does over-comparing when one flushing | Critical | Performance |
+| [HBASE-19724](https://issues.apache.org/jira/browse/HBASE-19724) | Fix Checkstyle errors in hbase-hadoop2-compat | Minor | . |
+| [HBASE-20620](https://issues.apache.org/jira/browse/HBASE-20620) | Tighter ByteBufferKeyValue Cell Comparator; part 2 | Major | Performance |
+| [HBASE-20564](https://issues.apache.org/jira/browse/HBASE-20564) | Tighter ByteBufferKeyValue Cell Comparator | Major | Performance |
+| [HBASE-20520](https://issues.apache.org/jira/browse/HBASE-20520) | Failed effort upping default HDFS blocksize, hbase.regionserver.hlog.blocksize | Major | conf |
+| [HBASE-20539](https://issues.apache.org/jira/browse/HBASE-20539) | Disable IMC; part 2 | Minor | in-memory-compaction |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component |
+|:---- |:---- | :--- |:---- |
+| [HBASE-20665](https://issues.apache.org/jira/browse/HBASE-20665) | "Already cached block XXX" message should be DEBUG | Minor | BlockCache |
+| [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 |
+
+## 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 doesnât 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 | . |
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