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From w...@apache.org
Subject [46/49] hadoop git commit: HADOOP-12798. Update changelog and release notes (2016-03-04) (aw)
Date Thu, 10 Mar 2016 03:40:45 GMT
http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.1/CHANGES.2.6.1.md
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+
+<!---
+# 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.
+-->
+# Apache Hadoop Changelog
+
+## Release 2.6.1 - 2015-09-23
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### IMPORTANT ISSUES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-12280](https://issues.apache.org/jira/browse/HADOOP-12280) | Skip unit tests based on maven profile rather than NativeCodeLoader.isNativeCodeLoaded |  Minor | test | Masatake Iwasaki | Masatake Iwasaki |
+| [HADOOP-11812](https://issues.apache.org/jira/browse/HADOOP-11812) | Implement listLocatedStatus for ViewFileSystem to speed up split calculation |  Blocker | fs | Gera Shegalov | Gera Shegalov |
+| [HADOOP-11506](https://issues.apache.org/jira/browse/HADOOP-11506) | Configuration variable expansion regex expensive for long values |  Major | conf | Dmitriy V. Ryaboy | Gera Shegalov |
+| [HADOOP-11466](https://issues.apache.org/jira/browse/HADOOP-11466) | FastByteComparisons: do not use UNSAFE\_COMPARER on the SPARC architecture because it is slower there |  Minor | io, performance, util | Suman Somasundar | Suman Somasundar |
+| [HADOOP-7139](https://issues.apache.org/jira/browse/HADOOP-7139) | Allow appending to existing SequenceFiles |  Major | io | Stephen Rose | Kanaka Kumar Avvaru |
+| [HDFS-8384](https://issues.apache.org/jira/browse/HDFS-8384) | Allow NN to startup if there are files having a lease but are not under construction |  Minor | namenode | Tsz Wo Nicholas Sze | Jing Zhao |
+| [HDFS-7579](https://issues.apache.org/jira/browse/HDFS-7579) | Improve log reporting during block report rpc failure |  Minor | datanode | Charles Lamb | Charles Lamb |
+| [HDFS-7531](https://issues.apache.org/jira/browse/HDFS-7531) | Improve the concurrent access on FsVolumeList |  Major | datanode | Lei (Eddy) Xu | Lei (Eddy) Xu |
+| [HDFS-7446](https://issues.apache.org/jira/browse/HDFS-7446) | HDFS inotify should have the ability to determine what txid it has read up to |  Major | hdfs-client | Colin Patrick McCabe | Colin Patrick McCabe |
+| [HDFS-7314](https://issues.apache.org/jira/browse/HDFS-7314) | When the DFSClient lease cannot be renewed, abort open-for-write files rather than the entire DFSClient |  Major | . | Ming Ma | Ming Ma |
+| [HDFS-7278](https://issues.apache.org/jira/browse/HDFS-7278) | Add a command that allows sysadmins to manually trigger full block reports from a DN |  Major | datanode | Colin Patrick McCabe | Colin Patrick McCabe |
+| [HDFS-7182](https://issues.apache.org/jira/browse/HDFS-7182) | JMX metrics aren't accessible when NN is busy |  Major | . | Ming Ma | Ming Ma |
+| [MAPREDUCE-6267](https://issues.apache.org/jira/browse/MAPREDUCE-6267) | Refactor JobSubmitter#copyAndConfigureFiles into it's own class |  Minor | . | Chris Trezzo | Chris Trezzo |
+| [YARN-3978](https://issues.apache.org/jira/browse/YARN-3978) | Configurably turn off the saving of container info in Generic AHS |  Major | timelineserver, yarn | Eric Payne | Eric Payne |
+| [YARN-3249](https://issues.apache.org/jira/browse/YARN-3249) | Add a "kill application" button to Resource Manager's Web UI |  Minor | resourcemanager | Ryu Kobayashi | Ryu Kobayashi |
+| [YARN-3248](https://issues.apache.org/jira/browse/YARN-3248) | Display count of nodes blacklisted by apps in the web UI |  Major | capacityscheduler, resourcemanager | Varun Vasudev | Varun Vasudev |
+| [YARN-3230](https://issues.apache.org/jira/browse/YARN-3230) | Clarify application states on the web UI |  Major | . | Jian He | Jian He |
+| [YARN-2301](https://issues.apache.org/jira/browse/YARN-2301) | Improve yarn container command |  Major | . | Jian He | Naganarasimha G R |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-11934](https://issues.apache.org/jira/browse/HADOOP-11934) | Use of JavaKeyStoreProvider in LdapGroupsMapping causes infinite loop |  Blocker | security | Mike Yoder | Larry McCay |
+| [HADOOP-11932](https://issues.apache.org/jira/browse/HADOOP-11932) |  MetricsSinkAdapter hangs when being stopped |  Critical | . | Jian He | Brahma Reddy Battula |
+| [HADOOP-11802](https://issues.apache.org/jira/browse/HADOOP-11802) | DomainSocketWatcher thread terminates sometimes after there is an I/O error during requestShortCircuitShm |  Major | . | Eric Payne | Colin Patrick McCabe |
+| [HADOOP-11730](https://issues.apache.org/jira/browse/HADOOP-11730) | Regression: s3n read failure recovery broken |  Major | fs/s3 | Takenori Sato | Takenori Sato |
+| [HADOOP-11674](https://issues.apache.org/jira/browse/HADOOP-11674) | oneByteBuf in CryptoInputStream and CryptoOutputStream should be non static |  Critical | io | Sean Busbey | Sean Busbey |
+| [HADOOP-11604](https://issues.apache.org/jira/browse/HADOOP-11604) | Prevent ConcurrentModificationException while closing domain sockets during shutdown of DomainSocketWatcher thread. |  Critical | net | Liang Xie | Chris Nauroth |
+| [HADOOP-11491](https://issues.apache.org/jira/browse/HADOOP-11491) | HarFs incorrectly declared as requiring an authority |  Critical | fs | Gera Shegalov | Brahma Reddy Battula |
+| [HADOOP-11482](https://issues.apache.org/jira/browse/HADOOP-11482) | Use correct UGI when KMSClientProvider is called by a proxy user |  Major | . | Arun Suresh | Arun Suresh |
+| [HADOOP-11368](https://issues.apache.org/jira/browse/HADOOP-11368) | Fix SSLFactory truststore reloader thread leak in KMSClientProvider |  Major | kms | Arun Suresh | Arun Suresh |
+| [HADOOP-11350](https://issues.apache.org/jira/browse/HADOOP-11350) | The size of header buffer of HttpServer is too small when HTTPS is enabled |  Major | security | Benoy Antony | Benoy Antony |
+| [HADOOP-11343](https://issues.apache.org/jira/browse/HADOOP-11343) | Overflow is not properly handled in caclulating final iv for AES CTR |  Blocker | security | Jerry Chen | Jerry Chen |
+| [HADOOP-11333](https://issues.apache.org/jira/browse/HADOOP-11333) | Fix deadlock in DomainSocketWatcher when the notification pipe is full |  Major | . | zhaoyunjiong | zhaoyunjiong |
+| [HADOOP-11316](https://issues.apache.org/jira/browse/HADOOP-11316) | "mvn package -Pdist,docs -DskipTests -Dtar" fails because of non-ascii characters |  Blocker | . | Tsuyoshi Ozawa | Tsuyoshi Ozawa |
+| [HADOOP-11295](https://issues.apache.org/jira/browse/HADOOP-11295) | RPC Server Reader thread can't shutdown if RPCCallQueue is full |  Major | . | Ming Ma | Ming Ma |
+| [HADOOP-11238](https://issues.apache.org/jira/browse/HADOOP-11238) | Update the NameNode's Group Cache in the background when possible |  Minor | . | Chris Li | Chris Li |
+| [HADOOP-10786](https://issues.apache.org/jira/browse/HADOOP-10786) | Fix UGI#reloginFromKeytab on Java 8 |  Major | security | Tobi Vollebregt | Stephen Chu |
+| [HADOOP-8151](https://issues.apache.org/jira/browse/HADOOP-8151) | Error handling in snappy decompressor throws invalid exceptions |  Major | io, native | Todd Lipcon | Matt Foley |
+| [HDFS-8863](https://issues.apache.org/jira/browse/HDFS-8863) | The remaining space check in BlockPlacementPolicyDefault is flawed |  Critical | . | Kihwal Lee | Kihwal Lee |
+| [HDFS-8846](https://issues.apache.org/jira/browse/HDFS-8846) | Add a unit test for INotify functionality across a layout version upgrade |  Major | namenode | Zhe Zhang | Zhe Zhang |
+| [HDFS-8486](https://issues.apache.org/jira/browse/HDFS-8486) | DN startup may cause severe data loss |  Blocker | datanode | Daryn Sharp | Daryn Sharp |
+| [HDFS-8480](https://issues.apache.org/jira/browse/HDFS-8480) | Fix performance and timeout issues in HDFS-7929 by using hard-links to preserve old edit logs instead of copying them |  Critical | . | Zhe Zhang | Zhe Zhang |
+| [HDFS-8431](https://issues.apache.org/jira/browse/HDFS-8431) | hdfs crypto class not found in Windows |  Critical | scripts | Sumana Sathish | Anu Engineer |
+| [HDFS-8404](https://issues.apache.org/jira/browse/HDFS-8404) | Pending block replication can get stuck using older genstamp |  Major | namenode | Nathan Roberts | Nathan Roberts |
+| [HDFS-8270](https://issues.apache.org/jira/browse/HDFS-8270) | create() always retried with hardcoded timeout when file already exists with open lease |  Major | hdfs-client | Andrey Stepachev | J.Andreina |
+| [HDFS-8245](https://issues.apache.org/jira/browse/HDFS-8245) | Standby namenode doesn't process DELETED\_BLOCK if the add block request is in edit log. |  Major | . | Rushabh S Shah | Rushabh S Shah |
+| [HDFS-8219](https://issues.apache.org/jira/browse/HDFS-8219) | setStoragePolicy with folder behavior is different after cluster restart |  Major | . | Peter Shi | Surendra Singh Lilhore |
+| [HDFS-8127](https://issues.apache.org/jira/browse/HDFS-8127) | NameNode Failover during HA upgrade can cause DataNode to finalize upgrade |  Blocker | ha | Jing Zhao | Jing Zhao |
+| [HDFS-8072](https://issues.apache.org/jira/browse/HDFS-8072) | Reserved RBW space is not released if client terminates while writing block |  Major | datanode | Arpit Agarwal | Arpit Agarwal |
+| [HDFS-8070](https://issues.apache.org/jira/browse/HDFS-8070) | Pre-HDFS-7915 DFSClient cannot use short circuit on post-HDFS-7915 DataNode |  Blocker | caching | Gopal V | Colin Patrick McCabe |
+| [HDFS-8046](https://issues.apache.org/jira/browse/HDFS-8046) | Allow better control of getContentSummary |  Major | . | Kihwal Lee | Kihwal Lee |
+| [HDFS-7999](https://issues.apache.org/jira/browse/HDFS-7999) | FsDatasetImpl#createTemporary sometimes holds the FSDatasetImpl lock for a very long time |  Major | . | zhouyingchao | zhouyingchao |
+| [HDFS-7980](https://issues.apache.org/jira/browse/HDFS-7980) | Incremental BlockReport will dramatically slow down the startup of  a namenode |  Major | . | Hui Zheng | Walter Su |
+| [HDFS-7960](https://issues.apache.org/jira/browse/HDFS-7960) | The full block report should prune zombie storages even if they're not empty |  Critical | . | Lei (Eddy) Xu | Colin Patrick McCabe |
+| [HDFS-7930](https://issues.apache.org/jira/browse/HDFS-7930) | commitBlockSynchronization() does not remove locations |  Blocker | namenode | Konstantin Shvachko | Yi Liu |
+| [HDFS-7929](https://issues.apache.org/jira/browse/HDFS-7929) | inotify unable fetch pre-upgrade edit log segments once upgrade starts |  Major | . | Zhe Zhang | Zhe Zhang |
+| [HDFS-7915](https://issues.apache.org/jira/browse/HDFS-7915) | The DataNode can sometimes allocate a ShortCircuitShm slot and fail to tell the DFSClient about it because of a network error |  Major | . | Colin Patrick McCabe | Colin Patrick McCabe |
+| [HDFS-7894](https://issues.apache.org/jira/browse/HDFS-7894) | Rolling upgrade readiness is not updated in jmx until query command is issued. |  Critical | . | Kihwal Lee | Brahma Reddy Battula |
+| [HDFS-7885](https://issues.apache.org/jira/browse/HDFS-7885) | Datanode should not trust the generation stamp provided by client |  Critical | datanode | vitthal (Suhas) Gogate | Tsz Wo Nicholas Sze |
+| [HDFS-7884](https://issues.apache.org/jira/browse/HDFS-7884) | NullPointerException in BlockSender |  Blocker | datanode | Tsz Wo Nicholas Sze | Brahma Reddy Battula |
+| [HDFS-7871](https://issues.apache.org/jira/browse/HDFS-7871) | NameNodeEditLogRoller can keep printing "Swallowing exception" message |  Critical | . | Jing Zhao | Jing Zhao |
+| [HDFS-7830](https://issues.apache.org/jira/browse/HDFS-7830) | DataNode does not release the volume lock when adding a volume fails. |  Major | datanode | Lei (Eddy) Xu | Lei (Eddy) Xu |
+| [HDFS-7788](https://issues.apache.org/jira/browse/HDFS-7788) | Post-2.6 namenode may not start up with an image containing inodes created with an old release. |  Blocker | . | Kihwal Lee | Rushabh S Shah |
+| [HDFS-7763](https://issues.apache.org/jira/browse/HDFS-7763) | fix zkfc hung issue due to not catching exception in a corner case |  Major | ha | Liang Xie | Liang Xie |
+| [HDFS-7742](https://issues.apache.org/jira/browse/HDFS-7742) | favoring decommissioning node for replication can cause a block to stay underreplicated for long periods |  Major | namenode | Nathan Roberts | Nathan Roberts |
+| [HDFS-7733](https://issues.apache.org/jira/browse/HDFS-7733) | NFS: readdir/readdirplus return null directory attribute on failure |  Major | nfs | Arpit Agarwal | Arpit Agarwal |
+| [HDFS-7714](https://issues.apache.org/jira/browse/HDFS-7714) | Simultaneous restart of HA NameNodes and DataNode can cause DataNode to register successfully with only one NameNode. |  Major | datanode | Chris Nauroth | Vinayakumar B |
+| [HDFS-7707](https://issues.apache.org/jira/browse/HDFS-7707) | Edit log corruption due to delayed block removal again |  Major | namenode | Yongjun Zhang | Yongjun Zhang |
+| [HDFS-7610](https://issues.apache.org/jira/browse/HDFS-7610) | Fix removal of dynamically added DN volumes |  Major | datanode | Lei (Eddy) Xu | Lei (Eddy) Xu |
+| [HDFS-7609](https://issues.apache.org/jira/browse/HDFS-7609) | Avoid retry cache collision when Standby NameNode loading edits |  Critical | namenode | Carrey Zhan | Ming Ma |
+| [HDFS-7596](https://issues.apache.org/jira/browse/HDFS-7596) | NameNode should prune dead storages from storageMap |  Major | namenode | Arpit Agarwal | Arpit Agarwal |
+| [HDFS-7587](https://issues.apache.org/jira/browse/HDFS-7587) | Edit log corruption can happen if append fails with a quota violation |  Blocker | namenode | Kihwal Lee | Jing Zhao |
+| [HDFS-7575](https://issues.apache.org/jira/browse/HDFS-7575) | Upgrade should generate a unique storage ID for each volume |  Critical | . | Lars Francke | Arpit Agarwal |
+| [HDFS-7552](https://issues.apache.org/jira/browse/HDFS-7552) | change FsVolumeList toString() to fix TestDataNodeVolumeFailureToleration |  Major | datanode, test | Liang Xie | Liang Xie |
+| [HDFS-7533](https://issues.apache.org/jira/browse/HDFS-7533) | Datanode sometimes does not shutdown on receiving upgrade shutdown command |  Major | . | Kihwal Lee | Eric Payne |
+| [HDFS-7503](https://issues.apache.org/jira/browse/HDFS-7503) | Namenode restart after large deletions can cause slow processReport (due to logging) |  Major | namenode | Arpit Agarwal | Arpit Agarwal |
+| [HDFS-7489](https://issues.apache.org/jira/browse/HDFS-7489) | Incorrect locking in FsVolumeList#checkDirs can hang datanodes |  Critical | datanode | Noah Lorang | Noah Lorang |
+| [HDFS-7470](https://issues.apache.org/jira/browse/HDFS-7470) | SecondaryNameNode need twice memory when calling reloadFromImageFile |  Major | namenode | zhaoyunjiong | zhaoyunjiong |
+| [HDFS-7443](https://issues.apache.org/jira/browse/HDFS-7443) | Datanode upgrade to BLOCKID\_BASED\_LAYOUT fails if duplicate block files are present in the same volume |  Blocker | . | Kihwal Lee | Colin Patrick McCabe |
+| [HDFS-7425](https://issues.apache.org/jira/browse/HDFS-7425) | NameNode block deletion logging uses incorrect appender. |  Minor | namenode | Chris Nauroth | Chris Nauroth |
+| [HDFS-7263](https://issues.apache.org/jira/browse/HDFS-7263) | Snapshot read can reveal future bytes for appended files. |  Major | hdfs-client | Konstantin Shvachko | Tao Luo |
+| [HDFS-7235](https://issues.apache.org/jira/browse/HDFS-7235) | DataNode#transferBlock should report blocks that don't exist using reportBadBlock |  Major | datanode, namenode | Yongjun Zhang | Yongjun Zhang |
+| [HDFS-7225](https://issues.apache.org/jira/browse/HDFS-7225) | Remove stale block invalidation work when DN re-registers with different UUID |  Major | namenode | Zhe Zhang | Zhe Zhang |
+| [HDFS-7213](https://issues.apache.org/jira/browse/HDFS-7213) | processIncrementalBlockReport performance degradation |  Critical | namenode | Daryn Sharp | Eric Payne |
+| [HDFS-7009](https://issues.apache.org/jira/browse/HDFS-7009) | Active NN and standby NN have different live nodes |  Major | datanode | Ming Ma | Ming Ma |
+| [HDFS-4882](https://issues.apache.org/jira/browse/HDFS-4882) | Prevent the Namenode's LeaseManager from looping forever in checkLeases |  Critical | hdfs-client, namenode | Zesheng Wu | Ravi Prakash |
+| [HDFS-3443](https://issues.apache.org/jira/browse/HDFS-3443) | Fix NPE when namenode transition to active during startup by adding checkNNStartup() in NameNodeRpcServer |  Major | auto-failover, ha | suja s | Vinayakumar B |
+| [MAPREDUCE-6361](https://issues.apache.org/jira/browse/MAPREDUCE-6361) | NPE issue in shuffle caused by concurrent issue between copySucceeded() in one thread and copyFailed() in another thread on the same host |  Critical | . | Junping Du | Junping Du |
+| [MAPREDUCE-6324](https://issues.apache.org/jira/browse/MAPREDUCE-6324) | Uber jobs fail to update AMRM token when it rolls over |  Blocker | mr-am | Jason Lowe | Jason Lowe |
+| [MAPREDUCE-6303](https://issues.apache.org/jira/browse/MAPREDUCE-6303) | Read timeout when retrying a fetch error can be fatal to a reducer |  Blocker | . | Jason Lowe | Jason Lowe |
+| [MAPREDUCE-6300](https://issues.apache.org/jira/browse/MAPREDUCE-6300) | Task list sort by task id broken |  Minor | . | Siqi Li | Siqi Li |
+| [MAPREDUCE-6238](https://issues.apache.org/jira/browse/MAPREDUCE-6238) | MR2 can't run local jobs with -libjars command options which is a regression from MR1 |  Critical | mrv2 | zhihai xu | zhihai xu |
+| [MAPREDUCE-6237](https://issues.apache.org/jira/browse/MAPREDUCE-6237) | Multiple mappers with DBInputFormat don't work because of reusing conections |  Major | mrv2 | Kannan Rajah | Kannan Rajah |
+| [MAPREDUCE-6230](https://issues.apache.org/jira/browse/MAPREDUCE-6230) | MR AM does not survive RM restart if RM activated a new AMRM secret key |  Blocker | mr-am | Jason Lowe | Jason Lowe |
+| [MAPREDUCE-6166](https://issues.apache.org/jira/browse/MAPREDUCE-6166) | Reducers do not validate checksum of map outputs when fetching directly to disk |  Major | mrv2 | Eric Payne | Eric Payne |
+| [MAPREDUCE-5649](https://issues.apache.org/jira/browse/MAPREDUCE-5649) | Reduce cannot use more than 2G memory  for the final merge |  Major | mrv2 | stanley shi | Gera Shegalov |
+| [YARN-4047](https://issues.apache.org/jira/browse/YARN-4047) | ClientRMService getApplications has high scheduler lock contention |  Major | resourcemanager | Jason Lowe | Jason Lowe |
+| [YARN-3999](https://issues.apache.org/jira/browse/YARN-3999) | RM hangs on draining events |  Major | . | Jian He | Jian He |
+| [YARN-3990](https://issues.apache.org/jira/browse/YARN-3990) | AsyncDispatcher may overloaded with RMAppNodeUpdateEvent when Node is connected/disconnected |  Critical | resourcemanager | Rohith Sharma K S | Bibin A Chundatt |
+| [YARN-3850](https://issues.apache.org/jira/browse/YARN-3850) | NM fails to read files from full disks which can lead to container logs being lost and other issues |  Blocker | log-aggregation, nodemanager | Varun Saxena | Varun Saxena |
+| [YARN-3832](https://issues.apache.org/jira/browse/YARN-3832) | Resource Localization fails on a cluster due to existing cache directories |  Critical | nodemanager | Ranga Swamy | Brahma Reddy Battula |
+| [YARN-3733](https://issues.apache.org/jira/browse/YARN-3733) | Fix DominantRC#compare() does not work as expected if cluster resource is empty |  Blocker | resourcemanager | Bibin A Chundatt | Rohith Sharma K S |
+| [YARN-3725](https://issues.apache.org/jira/browse/YARN-3725) | App submission via REST API is broken in secure mode due to Timeline DT service address is empty |  Blocker | resourcemanager, timelineserver | Zhijie Shen | Zhijie Shen |
+| [YARN-3585](https://issues.apache.org/jira/browse/YARN-3585) | NodeManager cannot exit on SHUTDOWN event triggered and NM recovery is enabled |  Critical | . | Peng Zhang | Rohith Sharma K S |
+| [YARN-3526](https://issues.apache.org/jira/browse/YARN-3526) | ApplicationMaster tracking URL is incorrectly redirected on a QJM cluster |  Major | resourcemanager, webapp | Weiwei Yang | Weiwei Yang |
+| [YARN-3493](https://issues.apache.org/jira/browse/YARN-3493) | RM fails to come up with error "Failed to load/recover state" when  mem settings are changed |  Critical | yarn | Sumana Sathish | Jian He |
+| [YARN-3464](https://issues.apache.org/jira/browse/YARN-3464) | Race condition in LocalizerRunner kills localizer before localizing all resources |  Critical | nodemanager | zhihai xu | zhihai xu |
+| [YARN-3393](https://issues.apache.org/jira/browse/YARN-3393) | Getting application(s) goes wrong when app finishes before starting the attempt |  Critical | timelineserver | Zhijie Shen | Zhijie Shen |
+| [YARN-3369](https://issues.apache.org/jira/browse/YARN-3369) | Missing NullPointer check in AppSchedulingInfo causes RM to die |  Blocker | resourcemanager | Giovanni Matteo Fumarola | Brahma Reddy Battula |
+| [YARN-3287](https://issues.apache.org/jira/browse/YARN-3287) | TimelineClient kerberos authentication failure uses wrong login context. |  Major | . | Jonathan Eagles | Daryn Sharp |
+| [YARN-3267](https://issues.apache.org/jira/browse/YARN-3267) | Timelineserver applies the ACL rules after applying the limit on the number of records |  Major | . | Prakash Ramachandran | Chang Li |
+| [YARN-3251](https://issues.apache.org/jira/browse/YARN-3251) | Fix CapacityScheduler deadlock when computing absolute max avail capacity (short term fix for 2.6.1) |  Blocker | . | Jason Lowe | Craig Welch |
+| [YARN-3242](https://issues.apache.org/jira/browse/YARN-3242) | Asynchrony in ZK-close can lead to ZKRMStateStore watcher receiving events for old client |  Critical | resourcemanager | zhihai xu | zhihai xu |
+| [YARN-3239](https://issues.apache.org/jira/browse/YARN-3239) | WebAppProxy does not support a final tracking url which has query fragments and params |  Major | . | Hitesh Shah | Jian He |
+| [YARN-3238](https://issues.apache.org/jira/browse/YARN-3238) | Connection timeouts to nodemanagers are retried at multiple levels |  Blocker | . | Jason Lowe | Jason Lowe |
+| [YARN-3231](https://issues.apache.org/jira/browse/YARN-3231) | FairScheduler: Changing queueMaxRunningApps interferes with pending jobs |  Critical | . | Siqi Li | Siqi Li |
+| [YARN-3227](https://issues.apache.org/jira/browse/YARN-3227) | Timeline renew delegation token fails when RM user's TGT is expired |  Critical | . | Jonathan Eagles | Zhijie Shen |
+| [YARN-3222](https://issues.apache.org/jira/browse/YARN-3222) | RMNodeImpl#ReconnectNodeTransition should send scheduler events in sequential order |  Critical | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-3207](https://issues.apache.org/jira/browse/YARN-3207) | secondary filter matches entites which do not have the key being filtered for. |  Major | timelineserver | Prakash Ramachandran | Zhijie Shen |
+| [YARN-3103](https://issues.apache.org/jira/browse/YARN-3103) | AMRMClientImpl does not update AMRM token properly |  Blocker | client | Jason Lowe | Jason Lowe |
+| [YARN-3094](https://issues.apache.org/jira/browse/YARN-3094) | reset timer for liveness monitors after RM recovery |  Major | resourcemanager | Jun Gong | Jun Gong |
+| [YARN-3055](https://issues.apache.org/jira/browse/YARN-3055) | The token is not renewed properly if it's shared by jobs (oozie) in DelegationTokenRenewer |  Blocker | security | Yi Liu | Daryn Sharp |
+| [YARN-3024](https://issues.apache.org/jira/browse/YARN-3024) | LocalizerRunner should give DIE action when all resources are localized |  Major | nodemanager | Chengbing Liu | Chengbing Liu |
+| [YARN-2997](https://issues.apache.org/jira/browse/YARN-2997) | NM keeps sending already-sent completed containers to RM until containers are removed from context |  Major | nodemanager | Chengbing Liu | Chengbing Liu |
+| [YARN-2992](https://issues.apache.org/jira/browse/YARN-2992) | ZKRMStateStore crashes due to session expiry |  Blocker | resourcemanager | Karthik Kambatla | Karthik Kambatla |
+| [YARN-2978](https://issues.apache.org/jira/browse/YARN-2978) | ResourceManager crashes with NPE while getting queue info |  Critical | . | Jason Tufo | Varun Saxena |
+| [YARN-2964](https://issues.apache.org/jira/browse/YARN-2964) | RM prematurely cancels tokens for jobs that submit jobs (oozie) |  Blocker | resourcemanager | Daryn Sharp | Jian He |
+| [YARN-2952](https://issues.apache.org/jira/browse/YARN-2952) | Incorrect version check in RMStateStore |  Major | . | Jian He | Rohith Sharma K S |
+| [YARN-2922](https://issues.apache.org/jira/browse/YARN-2922) | ConcurrentModificationException in CapacityScheduler's LeafQueue |  Major | capacityscheduler, resourcemanager, scheduler | Jason Tufo | Rohith Sharma K S |
+| [YARN-2917](https://issues.apache.org/jira/browse/YARN-2917) | Potential deadlock in AsyncDispatcher when system.exit called in AsyncDispatcher#dispatch and AsyscDispatcher#serviceStop from shutdown hook |  Critical | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-2910](https://issues.apache.org/jira/browse/YARN-2910) | FSLeafQueue can throw ConcurrentModificationException |  Major | fairscheduler | Wilfred Spiegelenburg | Wilfred Spiegelenburg |
+| [YARN-2906](https://issues.apache.org/jira/browse/YARN-2906) | CapacitySchedulerPage shows HTML tags for a queue's Active Users |  Major | capacityscheduler | Jason Lowe | Jason Lowe |
+| [YARN-2905](https://issues.apache.org/jira/browse/YARN-2905) | AggregatedLogsBlock page can infinitely loop if the aggregated log file is corrupted |  Blocker | . | Jason Lowe | Varun Saxena |
+| [YARN-2894](https://issues.apache.org/jira/browse/YARN-2894) | When ACL's are enabled, if RM switches then application can not be viewed from web. |  Major | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-2890](https://issues.apache.org/jira/browse/YARN-2890) | MiniYarnCluster should turn on timeline service if configured to do so |  Major | . | Mit Desai | Mit Desai |
+| [YARN-2874](https://issues.apache.org/jira/browse/YARN-2874) | Dead lock in "DelegationTokenRenewer" which blocks RM to execute any further apps |  Blocker | resourcemanager | Naganarasimha G R | Naganarasimha G R |
+| [YARN-2865](https://issues.apache.org/jira/browse/YARN-2865) | Application recovery continuously fails with "Application with id already present. Cannot duplicate" |  Critical | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-2856](https://issues.apache.org/jira/browse/YARN-2856) | Application recovery throw InvalidStateTransitonException: Invalid event: ATTEMPT\_KILLED at ACCEPTED |  Critical | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-2816](https://issues.apache.org/jira/browse/YARN-2816) | NM fail to start with NPE during container recovery |  Major | nodemanager | zhihai xu | zhihai xu |
+| [YARN-2637](https://issues.apache.org/jira/browse/YARN-2637) | maximum-am-resource-percent could be respected for both LeafQueue/User when trying to activate applications. |  Critical | resourcemanager | Wangda Tan | Craig Welch |
+| [YARN-2414](https://issues.apache.org/jira/browse/YARN-2414) | RM web UI: app page will crash if app is failed before any attempt has been created |  Major | webapp | Zhijie Shen | Wangda Tan |
+| [YARN-2340](https://issues.apache.org/jira/browse/YARN-2340) | NPE thrown when RM restart after queue is STOPPED. There after RM can not recovery application's and remain in standby |  Critical | resourcemanager, scheduler | Nishan Shetty | Rohith Sharma K S |
+| [YARN-2246](https://issues.apache.org/jira/browse/YARN-2246) | Job History Link in RM UI is redirecting to the URL which contains Job Id twice |  Major | webapp | Devaraj K | Devaraj K |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-11710](https://issues.apache.org/jira/browse/HADOOP-11710) | Make CryptoOutputStream behave like DFSOutputStream wrt synchronization |  Critical | fs | Sean Busbey | Sean Busbey |
+| [HDFS-7035](https://issues.apache.org/jira/browse/HDFS-7035) | Make adding a new data directory to the DataNode an atomic operation and improve error handling |  Major | datanode | Lei (Eddy) Xu | Lei (Eddy) Xu |
+| [YARN-3740](https://issues.apache.org/jira/browse/YARN-3740) | Fixed the typo with the configuration name: APPLICATION\_HISTORY\_PREFIX\_MAX\_APPS |  Major | resourcemanager, webapp, yarn | Xuan Gong | Xuan Gong |
+| [YARN-3700](https://issues.apache.org/jira/browse/YARN-3700) | ATS Web Performance issue at load time when large number of jobs |  Major | resourcemanager, webapp, yarn | Xuan Gong | Xuan Gong |
+| [YARN-3544](https://issues.apache.org/jira/browse/YARN-3544) | AM logs link missing in the RM UI for a completed app |  Blocker | . | Hitesh Shah | Xuan Gong |
+| [YARN-3487](https://issues.apache.org/jira/browse/YARN-3487) | CapacityScheduler scheduler lock obtained unnecessarily when calling getQueue |  Critical | capacityscheduler | Jason Lowe | Jason Lowe |
+| [YARN-3171](https://issues.apache.org/jira/browse/YARN-3171) | Sort by Application id, AppAttempt & ContainerID doesn't work in ATS / RM web ui |  Minor | timelineserver | Jeff Zhang | Naganarasimha G R |
+| [YARN-3124](https://issues.apache.org/jira/browse/YARN-3124) | Capacity Scheduler LeafQueue/ParentQueue should use QueueCapacities to track capacities-by-label |  Major | api, client, resourcemanager | Wangda Tan | Wangda Tan |
+| [YARN-3099](https://issues.apache.org/jira/browse/YARN-3099) | Capacity Scheduler LeafQueue/ParentQueue should use ResourceUsage to track used-resources-by-label. |  Major | api, client, resourcemanager | Wangda Tan | Wangda Tan |
+| [YARN-3098](https://issues.apache.org/jira/browse/YARN-3098) | Create common QueueCapacities class in Capacity Scheduler to track capacities-by-labels of queues |  Major | capacityscheduler | Wangda Tan | Wangda Tan |
+| [YARN-3092](https://issues.apache.org/jira/browse/YARN-3092) | Create common ResourceUsage class to track labeled resource usages in Capacity Scheduler |  Major | api, client, resourcemanager | Wangda Tan | Wangda Tan |
+| [YARN-3011](https://issues.apache.org/jira/browse/YARN-3011) | NM dies because of the failure of resource localization |  Major | nodemanager | Wang Hao | Varun Saxena |
+| [YARN-2920](https://issues.apache.org/jira/browse/YARN-2920) | CapacityScheduler should be notified when labels on nodes changed |  Major | . | Wangda Tan | Wangda Tan |
+| [YARN-2918](https://issues.apache.org/jira/browse/YARN-2918) | Don't fail RM if queue's configured labels are not existed in cluster-node-labels |  Major | resourcemanager | Rohith Sharma K S | Wangda Tan |
+| [YARN-2900](https://issues.apache.org/jira/browse/YARN-2900) | Application (Attempt and Container) Not Found in AHS results in Internal Server Error (500) |  Major | timelineserver | Jonathan Eagles | Mit Desai |
+| [YARN-2766](https://issues.apache.org/jira/browse/YARN-2766) |  ApplicationHistoryManager is expected to return a sorted list of apps/attempts/containers |  Major | timelineserver | Robert Kanter | Robert Kanter |
+| [YARN-2694](https://issues.apache.org/jira/browse/YARN-2694) | Ensure only single node labels specified in resource request / host, and node label expression only specified when resourceName=ANY |  Major | capacityscheduler, resourcemanager | Wangda Tan | Wangda Tan |
+| [YARN-1984](https://issues.apache.org/jira/browse/YARN-1984) | LeveldbTimelineStore does not handle db exceptions properly |  Major | . | Jason Lowe | Varun Saxena |
+| [YARN-1884](https://issues.apache.org/jira/browse/YARN-1884) | ContainerReport should have nodeHttpAddress |  Major | . | Zhijie Shen | Xuan Gong |
+| [YARN-1809](https://issues.apache.org/jira/browse/YARN-1809) | Synchronize RM and Generic History Service Web-UIs |  Major | . | Zhijie Shen | Xuan Gong |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |

http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.1/RELEASENOTES.2.6.1.md
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diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.1/RELEASENOTES.2.6.1.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.1/RELEASENOTES.2.6.1.md
new file mode 100644
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+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.1/RELEASENOTES.2.6.1.md
@@ -0,0 +1,45 @@
+
+<!---
+# 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.
+-->
+# Apache Hadoop  2.6.1 Release Notes
+
+These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.
+
+
+---
+
+* [HADOOP-7139](https://issues.apache.org/jira/browse/HADOOP-7139) | *Major* | **Allow appending to existing SequenceFiles**
+
+Existing sequence files can be appended.
+
+
+---
+
+* [HDFS-8486](https://issues.apache.org/jira/browse/HDFS-8486) | *Blocker* | **DN startup may cause severe data loss**
+
+<!-- markdown -->
+Public service notice:
+* Every restart of a 2.6.x or 2.7.0 DN incurs a risk of unwanted block deletion.
+* Apply this patch if you are running a pre-2.7.1 release.
+
+
+---
+
+* [HDFS-8270](https://issues.apache.org/jira/browse/HDFS-8270) | *Major* | **create() always retried with hardcoded timeout when file already exists with open lease**
+
+Proxy level retries will not be done on AlreadyBeingCreatedExeption for create() op.

http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.2/CHANGES.2.6.2.md
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diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.2/CHANGES.2.6.2.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.2/CHANGES.2.6.2.md
new file mode 100644
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--- /dev/null
+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.2/CHANGES.2.6.2.md
@@ -0,0 +1,83 @@
+
+<!---
+# 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.
+-->
+# Apache Hadoop Changelog
+
+## Release 2.6.2 - 2015-10-28
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### IMPORTANT ISSUES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [YARN-3727](https://issues.apache.org/jira/browse/YARN-3727) | For better error recovery, check if the directory exists before using it for localization. |  Major | nodemanager | zhihai xu | zhihai xu |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [MAPREDUCE-6497](https://issues.apache.org/jira/browse/MAPREDUCE-6497) | Fix wrong value of JOB\_FINISHED event in JobHistoryEventHandler |  Major | . | Shinichi Yamashita | Shinichi Yamashita |
+| [MAPREDUCE-6454](https://issues.apache.org/jira/browse/MAPREDUCE-6454) | MapReduce doesn't set the HADOOP\_CLASSPATH for jar lib in distributed cache. |  Critical | . | Junping Du | Junping Du |
+| [MAPREDUCE-6334](https://issues.apache.org/jira/browse/MAPREDUCE-6334) | Fetcher#copyMapOutput is leaking usedMemory upon IOException during InMemoryMapOutput shuffle handler |  Blocker | . | Eric Payne | Eric Payne |
+| [YARN-4087](https://issues.apache.org/jira/browse/YARN-4087) | Followup fixes after YARN-2019 regarding RM behavior when state-store error occurs |  Major | . | Jian He | Jian He |
+| [YARN-4005](https://issues.apache.org/jira/browse/YARN-4005) | Completed container whose app is finished is not removed from NMStateStore |  Major | . | Jun Gong | Jun Gong |
+| [YARN-3896](https://issues.apache.org/jira/browse/YARN-3896) | RMNode transitioned from RUNNING to REBOOTED because its response id had not been reset synchronously |  Major | resourcemanager | Jun Gong | Jun Gong |
+| [YARN-3802](https://issues.apache.org/jira/browse/YARN-3802) | Two RMNodes for the same NodeId are used in RM sometimes after NM is reconnected. |  Major | resourcemanager | zhihai xu | zhihai xu |
+| [YARN-3798](https://issues.apache.org/jira/browse/YARN-3798) | ZKRMStateStore shouldn't create new session without occurrance of SESSIONEXPIED |  Blocker | resourcemanager | Bibin A Chundatt | Varun Saxena |
+| [YARN-3780](https://issues.apache.org/jira/browse/YARN-3780) | Should use equals when compare Resource in RMNodeImpl#ReconnectNodeTransition |  Minor | resourcemanager | zhihai xu | zhihai xu |
+| [YARN-3554](https://issues.apache.org/jira/browse/YARN-3554) | Default value for maximum nodemanager connect wait time is too high |  Major | . | Jason Lowe | Naganarasimha G R |
+| [YARN-3194](https://issues.apache.org/jira/browse/YARN-3194) | RM should handle NMContainerStatuses sent by NM while registering if NM is Reconnected node |  Blocker | resourcemanager | Rohith Sharma K S | Rohith Sharma K S |
+| [YARN-2019](https://issues.apache.org/jira/browse/YARN-2019) | Retrospect on decision of making RM crashed if any exception throw in ZKRMStateStore |  Critical | . | Junping Du | Jian He |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [YARN-4101](https://issues.apache.org/jira/browse/YARN-4101) | RM should print alert messages if Zookeeper and Resourcemanager gets connection issue |  Critical | yarn | Yesha Vora | Xuan Gong |
+| [YARN-4092](https://issues.apache.org/jira/browse/YARN-4092) | RM HA UI redirection needs to be fixed when both RMs are in standby mode |  Major | resourcemanager | Xuan Gong | Xuan Gong |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |

http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.2/RELEASENOTES.2.6.2.md
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diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.2/RELEASENOTES.2.6.2.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.2/RELEASENOTES.2.6.2.md
new file mode 100644
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+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.2/RELEASENOTES.2.6.2.md
@@ -0,0 +1,21 @@
+
+<!---
+# 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.
+-->
+# Apache Hadoop  2.6.2 Release Notes
+
+These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.

http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.3/CHANGES.2.6.3.md
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diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.3/CHANGES.2.6.3.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.3/CHANGES.2.6.3.md
new file mode 100644
index 0000000..e0c4f1c
--- /dev/null
+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.3/CHANGES.2.6.3.md
@@ -0,0 +1,103 @@
+
+<!---
+# 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.
+-->
+# Apache Hadoop Changelog
+
+## Release 2.6.3 - 2015-12-17
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### IMPORTANT ISSUES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-12413](https://issues.apache.org/jira/browse/HADOOP-12413) | AccessControlList should avoid calling getGroupNames in isUserInList with empty groups. |  Major | security | zhihai xu | zhihai xu |
+| [HDFS-9434](https://issues.apache.org/jira/browse/HDFS-9434) | Recommission a datanode with 500k blocks may pause NN for 30 seconds |  Major | namenode | Tsz Wo Nicholas Sze | Tsz Wo Nicholas Sze |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-12577](https://issues.apache.org/jira/browse/HADOOP-12577) | Bump up commons-collections version to 3.2.2 to address a security flaw |  Blocker | build, security | Wei-Chiu Chuang | Wei-Chiu Chuang |
+| [HADOOP-12526](https://issues.apache.org/jira/browse/HADOOP-12526) | [Branch-2] there are duplicate dependency definitions in pom's |  Major | build | Sangjin Lee | Sangjin Lee |
+| [HADOOP-12230](https://issues.apache.org/jira/browse/HADOOP-12230) | hadoop-project declares duplicate, conflicting curator dependencies |  Minor | build | Steve Loughran | Rakesh R |
+| [HADOOP-11267](https://issues.apache.org/jira/browse/HADOOP-11267) | TestSecurityUtil fails when run with JDK8 because of empty principal names |  Minor | security, test | Stephen Chu | Stephen Chu |
+| [HADOOP-10134](https://issues.apache.org/jira/browse/HADOOP-10134) | [JDK8] Fix Javadoc errors caused by incorrect or illegal tags in doc comments |  Minor | . | Andrew Purtell | Andrew Purtell |
+| [HADOOP-9242](https://issues.apache.org/jira/browse/HADOOP-9242) | Duplicate surefire plugin config in hadoop-common |  Major | test | Andrey Klochkov | Andrey Klochkov |
+| [HDFS-9470](https://issues.apache.org/jira/browse/HDFS-9470) | Encryption zone on root not loaded from fsimage after NN restart |  Critical | . | Xiao Chen | Xiao Chen |
+| [HDFS-9431](https://issues.apache.org/jira/browse/HDFS-9431) | DistributedFileSystem#concat fails if the target path is relative. |  Major | hdfs-client | Kazuho Fujii | Kazuho Fujii |
+| [HDFS-9289](https://issues.apache.org/jira/browse/HDFS-9289) | Make DataStreamer#block thread safe and verify genStamp in commitBlock |  Critical | . | Chang Li | Chang Li |
+| [HDFS-9273](https://issues.apache.org/jira/browse/HDFS-9273) | ACLs on root directory may be lost after NN restart |  Critical | namenode | Xiao Chen | Xiao Chen |
+| [HDFS-9083](https://issues.apache.org/jira/browse/HDFS-9083) | Replication violates block placement policy. |  Blocker | namenode | Rushabh S Shah | Rushabh S Shah |
+| [HDFS-8615](https://issues.apache.org/jira/browse/HDFS-8615) | Correct HTTP method in WebHDFS document |  Major | documentation | Akira AJISAKA | Brahma Reddy Battula |
+| [MAPREDUCE-6549](https://issues.apache.org/jira/browse/MAPREDUCE-6549) | multibyte delimiters with LineRecordReader cause duplicate records |  Major | mrv1, mrv2 | Dustin Cote | Wilfred Spiegelenburg |
+| [MAPREDUCE-6540](https://issues.apache.org/jira/browse/MAPREDUCE-6540) | TestMRTimelineEventHandling fails |  Major | test | Sangjin Lee | Sangjin Lee |
+| [MAPREDUCE-6528](https://issues.apache.org/jira/browse/MAPREDUCE-6528) | Memory leak for HistoryFileManager.getJobSummary() |  Critical | jobhistoryserver | Junping Du | Junping Du |
+| [MAPREDUCE-6481](https://issues.apache.org/jira/browse/MAPREDUCE-6481) | LineRecordReader may give incomplete record and wrong position/key information for uncompressed input sometimes. |  Critical | mrv2 | zhihai xu | zhihai xu |
+| [MAPREDUCE-6377](https://issues.apache.org/jira/browse/MAPREDUCE-6377) | JHS sorting on state column not working in webUi |  Minor | jobhistoryserver | Bibin A Chundatt | zhihai xu |
+| [MAPREDUCE-6273](https://issues.apache.org/jira/browse/MAPREDUCE-6273) | HistoryFileManager should check whether summaryFile exists to avoid FileNotFoundException causing HistoryFileInfo into MOVE\_FAILED state |  Minor | jobhistoryserver | zhihai xu | zhihai xu |
+| [MAPREDUCE-5948](https://issues.apache.org/jira/browse/MAPREDUCE-5948) | org.apache.hadoop.mapred.LineRecordReader does not handle multibyte record delimiters well |  Critical | . | Kris Geusebroek | Akira AJISAKA |
+| [MAPREDUCE-5883](https://issues.apache.org/jira/browse/MAPREDUCE-5883) | "Total megabyte-seconds" in job counters is slightly misleading |  Minor | . | Nathan Roberts | Nathan Roberts |
+| [YARN-4434](https://issues.apache.org/jira/browse/YARN-4434) | NodeManager Disk Checker parameter documentation is not correct |  Minor | documentation, nodemanager | Takashi Ohnishi | Weiwei Yang |
+| [YARN-4424](https://issues.apache.org/jira/browse/YARN-4424) | Fix deadlock in RMAppImpl |  Blocker | . | Yesha Vora | Jian He |
+| [YARN-4365](https://issues.apache.org/jira/browse/YARN-4365) | FileSystemNodeLabelStore should check for root dir existence on startup |  Major | resourcemanager | Jason Lowe | Kuhu Shukla |
+| [YARN-4348](https://issues.apache.org/jira/browse/YARN-4348) | ZKRMStateStore.syncInternal shouldn't wait for sync completion for avoiding blocking ZK's event thread |  Blocker | . | Tsuyoshi Ozawa | Tsuyoshi Ozawa |
+| [YARN-4344](https://issues.apache.org/jira/browse/YARN-4344) | NMs reconnecting with changed capabilities can lead to wrong cluster resource calculations |  Critical | resourcemanager | Varun Vasudev | Varun Vasudev |
+| [YARN-4326](https://issues.apache.org/jira/browse/YARN-4326) | Fix TestDistributedShell timeout as AHS in MiniYarnCluster no longer binds to default port 8188 |  Major | . | MENG DING | MENG DING |
+| [YARN-4320](https://issues.apache.org/jira/browse/YARN-4320) | TestJobHistoryEventHandler fails as AHS in MiniYarnCluster no longer binds to default port 8188 |  Major | . | Varun Saxena | Varun Saxena |
+| [YARN-4312](https://issues.apache.org/jira/browse/YARN-4312) | TestSubmitApplicationWithRMHA fails on branch-2.7 and branch-2.6 as some of the test cases time out |  Major | . | Varun Saxena | Varun Saxena |
+| [YARN-4241](https://issues.apache.org/jira/browse/YARN-4241) | Fix typo of property name in yarn-default.xml |  Major | documentation | Anthony Rojas | Anthony Rojas |
+| [YARN-3925](https://issues.apache.org/jira/browse/YARN-3925) | ContainerLogsUtils#getContainerLogFile fails to read container log files from full disks. |  Critical | nodemanager | zhihai xu | zhihai xu |
+| [YARN-3878](https://issues.apache.org/jira/browse/YARN-3878) | AsyncDispatcher can hang while stopping if it is configured for draining events on stop |  Critical | . | Varun Saxena | Varun Saxena |
+| [YARN-2859](https://issues.apache.org/jira/browse/YARN-2859) | ApplicationHistoryServer binds to default port 8188 in MiniYARNCluster |  Critical | timelineserver | Hitesh Shah | Vinod Kumar Vavilapalli |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-10668](https://issues.apache.org/jira/browse/HADOOP-10668) | TestZKFailoverControllerStress#testExpireBackAndForth occasionally fails |  Major | test | Ted Yu | Ming Ma |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |

http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.3/RELEASENOTES.2.6.3.md
----------------------------------------------------------------------
diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.3/RELEASENOTES.2.6.3.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.3/RELEASENOTES.2.6.3.md
new file mode 100644
index 0000000..e262545
--- /dev/null
+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.3/RELEASENOTES.2.6.3.md
@@ -0,0 +1,21 @@
+
+<!---
+# 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.
+-->
+# Apache Hadoop  2.6.3 Release Notes
+
+These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.

http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.4/CHANGES.2.6.4.md
----------------------------------------------------------------------
diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.4/CHANGES.2.6.4.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.4/CHANGES.2.6.4.md
new file mode 100644
index 0000000..e38a93a
--- /dev/null
+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.4/CHANGES.2.6.4.md
@@ -0,0 +1,114 @@
+
+<!---
+# 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.
+-->
+# Apache Hadoop Changelog
+
+## Release 2.6.4 - 2016-02-11
+
+### INCOMPATIBLE CHANGES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [YARN-3154](https://issues.apache.org/jira/browse/YARN-3154) | Should not upload partial logs for MR jobs or other "short-running' applications |  Blocker | nodemanager, resourcemanager | Xuan Gong | Xuan Gong |
+
+
+### IMPORTANT ISSUES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### NEW FEATURES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
+### IMPROVEMENTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HDFS-9415](https://issues.apache.org/jira/browse/HDFS-9415) | Document dfs.cluster.administrators and dfs.permissions.superusergroup |  Major | documentation | Arpit Agarwal | Xiaobing Zhou |
+| [HDFS-9314](https://issues.apache.org/jira/browse/HDFS-9314) | Improve BlockPlacementPolicyDefault's picking of excess replicas |  Major | . | Ming Ma | Xiao Chen |
+| [HDFS-8722](https://issues.apache.org/jira/browse/HDFS-8722) | Optimize datanode writes for small writes and flushes |  Critical | . | Kihwal Lee | Kihwal Lee |
+| [HDFS-8647](https://issues.apache.org/jira/browse/HDFS-8647) | Abstract BlockManager's rack policy into BlockPlacementPolicy |  Major | . | Ming Ma | Brahma Reddy Battula |
+| [HDFS-7694](https://issues.apache.org/jira/browse/HDFS-7694) | FSDataInputStream should support "unbuffer" |  Major | . | Colin Patrick McCabe | Colin Patrick McCabe |
+| [MAPREDUCE-6436](https://issues.apache.org/jira/browse/MAPREDUCE-6436) | JobHistory cache issue |  Blocker | . | Ryu Kobayashi | Kai Sasaki |
+
+
+### BUG FIXES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-12706](https://issues.apache.org/jira/browse/HADOOP-12706) | TestLocalFsFCStatistics#testStatisticsThreadLocalDataCleanUp times out occasionally |  Major | test | Jason Lowe | Sangjin Lee |
+| [HADOOP-12107](https://issues.apache.org/jira/browse/HADOOP-12107) | long running apps may have a huge number of StatisticsData instances under FileSystem |  Critical | fs | Sangjin Lee | Sangjin Lee |
+| [HADOOP-11252](https://issues.apache.org/jira/browse/HADOOP-11252) | RPC client does not time out by default |  Critical | ipc | Wilfred Spiegelenburg | Masatake Iwasaki |
+| [HDFS-9600](https://issues.apache.org/jira/browse/HDFS-9600) | do not check replication if the block is under construction |  Critical | . | Phil Yang | Phil Yang |
+| [HDFS-9574](https://issues.apache.org/jira/browse/HDFS-9574) | Reduce client failures during datanode restart |  Major | . | Kihwal Lee | Kihwal Lee |
+| [HDFS-9445](https://issues.apache.org/jira/browse/HDFS-9445) | Datanode may deadlock while handling a bad volume |  Blocker | . | Kihwal Lee | Walter Su |
+| [HDFS-9313](https://issues.apache.org/jira/browse/HDFS-9313) | Possible NullPointerException in BlockManager if no excess replica can be chosen |  Major | . | Ming Ma | Ming Ma |
+| [HDFS-9294](https://issues.apache.org/jira/browse/HDFS-9294) | DFSClient  deadlock when close file and failed to renew lease |  Blocker | hdfs-client | DENG FEI | Brahma Reddy Battula |
+| [HDFS-9220](https://issues.apache.org/jira/browse/HDFS-9220) | Reading small file (\< 512 bytes) that is open for append fails due to incorrect checksum |  Blocker | . | Bogdan Raducanu | Jing Zhao |
+| [HDFS-9178](https://issues.apache.org/jira/browse/HDFS-9178) | Slow datanode I/O can cause a wrong node to be marked bad |  Critical | . | Kihwal Lee | Kihwal Lee |
+| [HDFS-8767](https://issues.apache.org/jira/browse/HDFS-8767) | RawLocalFileSystem.listStatus() returns null for UNIX pipefile |  Critical | . | Haohui Mai | Kanaka Kumar Avvaru |
+| [HDFS-6945](https://issues.apache.org/jira/browse/HDFS-6945) | BlockManager should remove a block from excessReplicateMap and decrement ExcessBlocks metric when the block is removed |  Critical | namenode | Akira AJISAKA | Akira AJISAKA |
+| [HDFS-4660](https://issues.apache.org/jira/browse/HDFS-4660) | Block corruption can happen during pipeline recovery |  Blocker | datanode | Peng Zhang | Kihwal Lee |
+| [MAPREDUCE-6621](https://issues.apache.org/jira/browse/MAPREDUCE-6621) | Memory Leak in JobClient#submitJobInternal() |  Major | . | Xuan Gong | Xuan Gong |
+| [MAPREDUCE-6619](https://issues.apache.org/jira/browse/MAPREDUCE-6619) | HADOOP\_CLASSPATH is overwritten in MR container |  Major | mrv2 | shanyu zhao | Junping Du |
+| [MAPREDUCE-6618](https://issues.apache.org/jira/browse/MAPREDUCE-6618) | YarnClientProtocolProvider leaking the YarnClient thread. |  Major | . | Xuan Gong | Xuan Gong |
+| [MAPREDUCE-6577](https://issues.apache.org/jira/browse/MAPREDUCE-6577) | MR AM unable to load native library without MR\_AM\_ADMIN\_USER\_ENV set |  Critical | mr-am | Sangjin Lee | Sangjin Lee |
+| [MAPREDUCE-6554](https://issues.apache.org/jira/browse/MAPREDUCE-6554) | MRAppMaster servicestart failing  with NPE in MRAppMaster#parsePreviousJobHistory |  Critical | . | Bibin A Chundatt | Bibin A Chundatt |
+| [MAPREDUCE-6492](https://issues.apache.org/jira/browse/MAPREDUCE-6492) | AsyncDispatcher exit with NPE on TaskAttemptImpl#sendJHStartEventForAssignedFailTask |  Critical | . | Bibin A Chundatt | Bibin A Chundatt |
+| [MAPREDUCE-6363](https://issues.apache.org/jira/browse/MAPREDUCE-6363) | [NNBench] Lease mismatch error when running with multiple mappers |  Critical | benchmarks | Brahma Reddy Battula | Bibin A Chundatt |
+| [MAPREDUCE-5982](https://issues.apache.org/jira/browse/MAPREDUCE-5982) | Task attempts that fail from the ASSIGNED state can disappear |  Major | mr-am | Jason Lowe | Chang Li |
+| [YARN-4598](https://issues.apache.org/jira/browse/YARN-4598) | Invalid event: RESOURCE\_FAILED at CONTAINER\_CLEANEDUP\_AFTER\_KILL |  Major | nodemanager | tangshangwen | tangshangwen |
+| [YARN-4581](https://issues.apache.org/jira/browse/YARN-4581) | AHS writer thread leak makes RM crash while RM is recovering |  Major | resourcemanager | sandflee | sandflee |
+| [YARN-4546](https://issues.apache.org/jira/browse/YARN-4546) | ResourceManager crash due to scheduling opportunity overflow |  Critical | resourcemanager | Jason Lowe | Jason Lowe |
+| [YARN-4452](https://issues.apache.org/jira/browse/YARN-4452) | NPE when submit Unmanaged application |  Critical | . | Naganarasimha G R | Naganarasimha G R |
+| [YARN-4414](https://issues.apache.org/jira/browse/YARN-4414) | Nodemanager connection errors are retried at multiple levels |  Major | nodemanager | Jason Lowe | Chang Li |
+| [YARN-4380](https://issues.apache.org/jira/browse/YARN-4380) | TestResourceLocalizationService.testDownloadingResourcesOnContainerKill fails intermittently |  Major | test | Tsuyoshi Ozawa | Varun Saxena |
+| [YARN-4354](https://issues.apache.org/jira/browse/YARN-4354) | Public resource localization fails with NPE |  Blocker | nodemanager | Jason Lowe | Jason Lowe |
+| [YARN-4180](https://issues.apache.org/jira/browse/YARN-4180) | AMLauncher does not retry on failures when talking to NM |  Critical | resourcemanager | Anubhav Dhoot | Anubhav Dhoot |
+| [YARN-3857](https://issues.apache.org/jira/browse/YARN-3857) | Memory leak in ResourceManager with SIMPLE mode |  Critical | resourcemanager | mujunchao | mujunchao |
+| [YARN-3849](https://issues.apache.org/jira/browse/YARN-3849) | Too much of preemption activity causing continuos killing of containers across queues |  Critical | capacityscheduler | Sunil G | Sunil G |
+| [YARN-3842](https://issues.apache.org/jira/browse/YARN-3842) | NMProxy should retry on NMNotYetReadyException |  Critical | . | Karthik Kambatla | Robert Kanter |
+| [YARN-3697](https://issues.apache.org/jira/browse/YARN-3697) | FairScheduler: ContinuousSchedulingThread can fail to shutdown |  Critical | fairscheduler | zhihai xu | zhihai xu |
+| [YARN-3695](https://issues.apache.org/jira/browse/YARN-3695) | ServerProxy (NMProxy, etc.) shouldn't retry forever for non network exception. |  Major | . | Junping Du | Raju Bairishetti |
+| [YARN-3535](https://issues.apache.org/jira/browse/YARN-3535) | Scheduler must re-request container resources when RMContainer transitions from ALLOCATED to KILLED |  Critical | capacityscheduler, fairscheduler, resourcemanager | Peng Zhang | Peng Zhang |
+| [YARN-2975](https://issues.apache.org/jira/browse/YARN-2975) | FSLeafQueue app lists are accessed without required locks |  Blocker | . | Karthik Kambatla | Karthik Kambatla |
+
+
+### TESTS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [HADOOP-12736](https://issues.apache.org/jira/browse/HADOOP-12736) | TestTimedOutTestsListener#testThreadDumpAndDeadlocks sometimes times out |  Major | . | Xiao Chen | Xiao Chen |
+
+
+### SUB-TASKS:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+| [YARN-3893](https://issues.apache.org/jira/browse/YARN-3893) | Both RM in active state when Admin#transitionToActive failure from refeshAll() |  Critical | resourcemanager | Bibin A Chundatt | Bibin A Chundatt |
+| [YARN-2902](https://issues.apache.org/jira/browse/YARN-2902) | Killing a container that is localizing can orphan resources in the DOWNLOADING state |  Major | nodemanager | Jason Lowe | Varun Saxena |
+
+
+### OTHER:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |

http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.4/RELEASENOTES.2.6.4.md
----------------------------------------------------------------------
diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.4/RELEASENOTES.2.6.4.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.4/RELEASENOTES.2.6.4.md
new file mode 100644
index 0000000..3eee62b
--- /dev/null
+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.6.4/RELEASENOTES.2.6.4.md
@@ -0,0 +1,28 @@
+
+<!---
+# 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.
+-->
+# Apache Hadoop  2.6.4 Release Notes
+
+These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.
+
+
+---
+
+* [YARN-3154](https://issues.apache.org/jira/browse/YARN-3154) | *Blocker* | **Should not upload partial logs for MR jobs or other "short-running' applications**
+
+Applications which made use of the LogAggregationContext in their application will need to revisit this code in order to make sure that their logs continue to get rolled out.

http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/CHANGES.2.7.0.md
----------------------------------------------------------------------
diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/CHANGES.2.7.0.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/CHANGES.2.7.0.md
index 81ff61e..3e27138 100644
--- a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/CHANGES.2.7.0.md
+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/CHANGES.2.7.0.md
@@ -24,17 +24,24 @@
 
 | JIRA | Summary | Priority | Component | Reporter | Contributor |
 |:---- |:---- | :--- |:---- |:---- |:---- |
-| [HADOOP-11498](https://issues.apache.org/jira/browse/HADOOP-11498) | Bump the version of HTrace to 3.1.0-incubating |  Major | . | Masatake Iwasaki | Masatake Iwasaki |
+| [HADOOP-11498](https://issues.apache.org/jira/browse/HADOOP-11498) | Bump the version of HTrace to 3.1.0-incubating |  Major | tracing | Masatake Iwasaki | Masatake Iwasaki |
 | [HADOOP-11492](https://issues.apache.org/jira/browse/HADOOP-11492) | Bump up curator version to 2.7.1 |  Major | . | Karthik Kambatla | Arun Suresh |
 | [HADOOP-11385](https://issues.apache.org/jira/browse/HADOOP-11385) | Prevent cross site scripting attack on JMXJSONServlet |  Critical | . | Haohui Mai | Haohui Mai |
 | [HADOOP-11311](https://issues.apache.org/jira/browse/HADOOP-11311) | Restrict uppercase key names from being created with JCEKS |  Major | security | Andrew Wang | Andrew Wang |
 | [HADOOP-10530](https://issues.apache.org/jira/browse/HADOOP-10530) | Make hadoop trunk build on Java7+ only |  Blocker | build | Steve Loughran | Steve Loughran |
+| [HDFS-7210](https://issues.apache.org/jira/browse/HDFS-7210) | Avoid two separate RPC's namenode.append() and namenode.getFileInfo() for an append call from DFSClient |  Major | hdfs-client, namenode | Vinayakumar B | Vinayakumar B |
 | [HDFS-6651](https://issues.apache.org/jira/browse/HDFS-6651) | Deletion failure can leak inodes permanently |  Critical | . | Kihwal Lee | Jing Zhao |
 | [HDFS-6252](https://issues.apache.org/jira/browse/HDFS-6252) | Phase out the old web UI in HDFS |  Minor | namenode | Fengdong Yu | Haohui Mai |
 | [YARN-3217](https://issues.apache.org/jira/browse/YARN-3217) | Remove httpclient dependency from hadoop-yarn-server-web-proxy |  Major | . | Akira AJISAKA | Brahma Reddy Battula |
 | [YARN-3154](https://issues.apache.org/jira/browse/YARN-3154) | Should not upload partial logs for MR jobs or other "short-running' applications |  Blocker | nodemanager, resourcemanager | Xuan Gong | Xuan Gong |
 
 
+### IMPORTANT ISSUES:
+
+| JIRA | Summary | Priority | Component | Reporter | Contributor |
+|:---- |:---- | :--- |:---- |:---- |:---- |
+
+
 ### NEW FEATURES:
 
 | JIRA | Summary | Priority | Component | Reporter | Contributor |
@@ -125,7 +132,6 @@
 | [HADOOP-10976](https://issues.apache.org/jira/browse/HADOOP-10976) | moving the source code of hadoop-tools docs to the directory under hadoop-tools |  Minor | documentation | Masatake Iwasaki | Masatake Iwasaki |
 | [HADOOP-10847](https://issues.apache.org/jira/browse/HADOOP-10847) | Remove the usage of sun.security.x509.\* in testing code |  Minor | security | Kai Zheng | pascal oliva |
 | [HADOOP-10809](https://issues.apache.org/jira/browse/HADOOP-10809) | hadoop-azure: page blob support |  Major | tools | Mike Liddell | Eric Hanson |
-| [HADOOP-10786](https://issues.apache.org/jira/browse/HADOOP-10786) | Fix UGI#reloginFromKeytab on Java 8 |  Major | security | Tobi Vollebregt | Stephen Chu |
 | [HADOOP-10670](https://issues.apache.org/jira/browse/HADOOP-10670) | Allow AuthenticationFilters to load secret from signature secret files |  Minor | security | Kai Zheng | Kai Zheng |
 | [HADOOP-10626](https://issues.apache.org/jira/browse/HADOOP-10626) | Limit Returning Attributes for LDAP search |  Major | security | Jason Hubbard | Jason Hubbard |
 | [HADOOP-10563](https://issues.apache.org/jira/browse/HADOOP-10563) | Remove the dependency of jsp in trunk |  Major | . | Haohui Mai | Haohui Mai |
@@ -221,7 +227,6 @@
 | [HDFS-7252](https://issues.apache.org/jira/browse/HDFS-7252) | small refinement to the use of isInAnEZ in FSNamesystem |  Trivial | . | Yi Liu | Yi Liu |
 | [HDFS-7242](https://issues.apache.org/jira/browse/HDFS-7242) | Code improvement for FSN#checkUnreadableBySuperuser |  Minor | namenode | Yi Liu | Yi Liu |
 | [HDFS-7223](https://issues.apache.org/jira/browse/HDFS-7223) | Tracing span description of IPC client is too long |  Minor | . | Masatake Iwasaki | Masatake Iwasaki |
-| [HDFS-7210](https://issues.apache.org/jira/browse/HDFS-7210) | Avoid two separate RPC's namenode.append() and namenode.getFileInfo() for an append call from DFSClient |  Major | hdfs-client, namenode | Vinayakumar B | Vinayakumar B |
 | [HDFS-7190](https://issues.apache.org/jira/browse/HDFS-7190) | Bad use of Preconditions in startFileInternal() |  Major | namenode | Konstantin Shvachko | Dawson Choong |
 | [HDFS-7186](https://issues.apache.org/jira/browse/HDFS-7186) | Document the "hadoop trace" command. |  Minor | documentation | Masatake Iwasaki | Masatake Iwasaki |
 | [HDFS-7182](https://issues.apache.org/jira/browse/HDFS-7182) | JMX metrics aren't accessible when NN is busy |  Major | . | Ming Ma | Ming Ma |
@@ -231,7 +236,7 @@
 | [HDFS-6741](https://issues.apache.org/jira/browse/HDFS-6741) | Improve permission denied message when FSPermissionChecker#checkOwner fails |  Trivial | . | Stephen Chu | Harsh J |
 | [HDFS-6735](https://issues.apache.org/jira/browse/HDFS-6735) | A minor optimization to avoid pread() be blocked by read() inside the same DFSInputStream |  Major | hdfs-client | Liang Xie | Lars Hofhansl |
 | [HDFS-6565](https://issues.apache.org/jira/browse/HDFS-6565) | Use jackson instead jetty json in hdfs-client |  Major | . | Haohui Mai | Akira AJISAKA |
-| [HDFS-6133](https://issues.apache.org/jira/browse/HDFS-6133) | Make Balancer support exclude specified path |  Major | balancer & mover, datanode | zhaoyunjiong | zhaoyunjiong |
+| [HDFS-6133](https://issues.apache.org/jira/browse/HDFS-6133) | Add a feature for replica pinning so that a pinned replica will not be moved by Balancer/Mover. |  Major | balancer & mover, datanode | zhaoyunjiong | zhaoyunjiong |
 | [HDFS-5853](https://issues.apache.org/jira/browse/HDFS-5853) | Add "hadoop.user.group.metrics.percentiles.intervals" to hdfs-default.xml |  Minor | documentation, namenode | Akira AJISAKA | Akira AJISAKA |
 | [HDFS-3342](https://issues.apache.org/jira/browse/HDFS-3342) | SocketTimeoutException in BlockSender.sendChunks could have a better error message |  Minor | datanode | Todd Lipcon | Yongjun Zhang |
 | [HDFS-2219](https://issues.apache.org/jira/browse/HDFS-2219) | Fsck should work with fully qualified file paths. |  Minor | tools | Jitendra Nath Pandey | Tsz Wo Nicholas Sze |
@@ -449,6 +454,7 @@
 | [HADOOP-10953](https://issues.apache.org/jira/browse/HADOOP-10953) | NetworkTopology#add calls NetworkTopology#toString without holding the netlock |  Minor | net | Liang Xie | Liang Xie |
 | [HADOOP-10852](https://issues.apache.org/jira/browse/HADOOP-10852) | NetgroupCache is not thread-safe |  Major | security | Benoy Antony | Benoy Antony |
 | [HADOOP-10840](https://issues.apache.org/jira/browse/HADOOP-10840) | Fix OutOfMemoryError caused by metrics system in Azure File System |  Major | metrics | shanyu zhao | shanyu zhao |
+| [HADOOP-10786](https://issues.apache.org/jira/browse/HADOOP-10786) | Fix UGI#reloginFromKeytab on Java 8 |  Major | security | Tobi Vollebregt | Stephen Chu |
 | [HADOOP-10748](https://issues.apache.org/jira/browse/HADOOP-10748) | HttpServer2 should not load JspServlet |  Major | . | Haohui Mai | Haohui Mai |
 | [HADOOP-10717](https://issues.apache.org/jira/browse/HADOOP-10717) | HttpServer2 should load jsp DTD from local jars instead of going remote |  Blocker | . | Dapeng Sun | Dapeng Sun |
 | [HADOOP-10714](https://issues.apache.org/jira/browse/HADOOP-10714) | AmazonS3Client.deleteObjects() need to be limited to 1000 entries per call |  Critical | fs/s3 | David S. Wang | Juan Yu |
@@ -479,7 +485,7 @@
 | [HDFS-7960](https://issues.apache.org/jira/browse/HDFS-7960) | The full block report should prune zombie storages even if they're not empty |  Critical | . | Lei (Eddy) Xu | Colin Patrick McCabe |
 | [HDFS-7957](https://issues.apache.org/jira/browse/HDFS-7957) | Truncate should verify quota before making changes |  Critical | namenode | Jing Zhao | Jing Zhao |
 | [HDFS-7956](https://issues.apache.org/jira/browse/HDFS-7956) | Improve logging for DatanodeRegistration. |  Major | namenode | Konstantin Shvachko | Plamen Jeliazkov |
-| [HDFS-7953](https://issues.apache.org/jira/browse/HDFS-7953) | NN Web UI fails to navigate to paths that contain # |  Minor | namenode | kanaka kumar avvaru | kanaka kumar avvaru |
+| [HDFS-7953](https://issues.apache.org/jira/browse/HDFS-7953) | NN Web UI fails to navigate to paths that contain # |  Minor | namenode | Kanaka Kumar Avvaru | Kanaka Kumar Avvaru |
 | [HDFS-7945](https://issues.apache.org/jira/browse/HDFS-7945) | The WebHdfs system on DN does not honor the length parameter |  Blocker | . | Haohui Mai | Haohui Mai |
 | [HDFS-7943](https://issues.apache.org/jira/browse/HDFS-7943) | Append cannot handle the last block with length greater than the preferred block size |  Blocker | . | Jing Zhao | Jing Zhao |
 | [HDFS-7942](https://issues.apache.org/jira/browse/HDFS-7942) | NFS: support regexp grouping in nfs.exports.allowed.hosts |  Major | nfs | Brandon Li | Brandon Li |

http://git-wip-us.apache.org/repos/asf/hadoop/blob/95d30a6e/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/RELEASENOTES.2.7.0.md
----------------------------------------------------------------------
diff --git a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/RELEASENOTES.2.7.0.md b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/RELEASENOTES.2.7.0.md
index e429b22..d8c4b7c 100644
--- a/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/RELEASENOTES.2.7.0.md
+++ b/hadoop-common-project/hadoop-common/src/site/markdown/release/2.7.0/RELEASENOTES.2.7.0.md
@@ -18,7 +18,7 @@
 -->
 # Apache Hadoop  2.7.0 Release Notes
 
-These release notes cover new developer and user-facing incompatibilities, features, and major improvements.
+These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.
 
 
 ---
@@ -30,13 +30,6 @@ ProtocolBuffer is packaged in Ubuntu
 
 ---
 
-* [HADOOP-11729](https://issues.apache.org/jira/browse/HADOOP-11729) | *Minor* | **Fix link to cgroups doc in site.xml**
-
-Committed this to trunk, branch-2, and branch-2.7. Thanks Masatake for your contribution!
-
-
----
-
 * [HADOOP-11498](https://issues.apache.org/jira/browse/HADOOP-11498) | *Major* | **Bump the version of HTrace to 3.1.0-incubating**
 
 **WARNING: No release note provided for this incompatible change.**
@@ -44,21 +37,16 @@ Committed this to trunk, branch-2, and branch-2.7. Thanks Masatake for your cont
 
 ---
 
-* [HADOOP-11497](https://issues.apache.org/jira/browse/HADOOP-11497) | *Major* | **Fix typo in ClusterSetup.html#Hadoop\_Startup**
-
-Correct startup command for cluster data nodes
-
-
----
-
 * [HADOOP-11492](https://issues.apache.org/jira/browse/HADOOP-11492) | *Major* | **Bump up curator version to 2.7.1**
 
+<!-- markdown -->
 Apache Curator version change: Apache Hadoop has updated the version of Apache Curator used from 2.6.0 to 2.7.1. This change should be binary and source compatible for the majority of downstream users. Notable exceptions:
-# Binary incompatible change: org.apache.curator.utils.PathUtils.validatePath(String) changed return types. Downstream users of this method will need to recompile.
-# Source incompatible change: org.apache.curator.framework.recipes.shared.SharedCountReader added a method to its interface definition. Downstream users with custom implementations of this interface can continue without binary compatibility problems but will need to modify their source code to recompile.
-# Source incompatible change: org.apache.curator.framework.recipes.shared.SharedValueReader added a method to its interface definition. Downstream users with custom implementations of this interface can continue without binary compatibility problems but will need to modify their source code to recompile.
 
-Downstream users are reminded that while the Hadoop community will attempt to avoid egregious incompatible dependency changes, there is currently no policy around when Hadoop's exposed dependencies will change across versions (ref http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/Compatibility.html#Java\_Classpath).
+* Binary incompatible change: org.apache.curator.utils.PathUtils.validatePath(String) changed return types. Downstream users of this method will need to recompile.
+* Source incompatible change: org.apache.curator.framework.recipes.shared.SharedCountReader added a method to its interface definition. Downstream users with custom implementations of this interface can continue without binary compatibility problems but will need to modify their source code to recompile.
+* Source incompatible change: org.apache.curator.framework.recipes.shared.SharedValueReader added a method to its interface definition. Downstream users with custom implementations of this interface can continue without binary compatibility problems but will need to modify their source code to recompile.
+
+Downstream users are reminded that while the Hadoop community will attempt to avoid egregious incompatible dependency changes, there is currently no policy around when Hadoop's exposed dependencies will change across versions (ref http://hadoop.apache.org/docs/current/hadoop-project-dist/hadoop-common/Compatibility.html#Java_Classpath ).
 
 
 ---
@@ -88,13 +76,6 @@ fs.s3a.max.total.tasks:    the maximum number of tasks that the LinkedBlockingQu
 
 ---
 
-* [HADOOP-11348](https://issues.apache.org/jira/browse/HADOOP-11348) | *Minor* | **Remove unused variable from CMake error message for finding openssl**
-
-Test failure is unrelated.  Committed to 2.7.  Thanks, Dian.
-
-
----
-
 * [HADOOP-11311](https://issues.apache.org/jira/browse/HADOOP-11311) | *Major* | **Restrict uppercase key names from being created with JCEKS**
 
 Keys with uppercase names can no longer be created when using the JavaKeyStoreProvider to resolve ambiguity about case-sensitivity in the KeyStore spec.
@@ -148,13 +129,6 @@ New fs -find command
 
 ---
 
-* [HDFS-8001](https://issues.apache.org/jira/browse/HDFS-8001) | *Trivial* | **RpcProgramNfs3 : wrong parsing of dfs.blocksize**
-
-patch is fully backward compatible.
-
-
----
-
 * [HDFS-7806](https://issues.apache.org/jira/browse/HDFS-7806) | *Minor* | **Refactor: move StorageType from hadoop-hdfs to hadoop-common**
 
 This fix moves the public class StorageType from the package org.apache.hadoop.hdfs to org.apache.hadoop.fs.
@@ -177,13 +151,6 @@ LibHDFS now supports 32-bit build targets on Windows.
 
 ---
 
-* [HDFS-7457](https://issues.apache.org/jira/browse/HDFS-7457) | *Major* | **DatanodeID generates excessive garbage**
-
-Thanks for the reviews, gentlemen. I've committed this to trunk and branch-2. Thanks for identifying and working on the issue, Daryn.
-
-
----
-
 * [HDFS-7411](https://issues.apache.org/jira/browse/HDFS-7411) | *Major* | **Refactor and improve decommissioning logic into DecommissionManager**
 
 This change introduces a new configuration key used to throttle decommissioning work, "dfs.namenode.decommission.blocks.per.interval". This new key overrides and deprecates the previous related configuration key "dfs.namenode.decommission.nodes.per.interval". The new key is intended to result in more predictable pause times while scanning decommissioning nodes.
@@ -191,17 +158,16 @@ This change introduces a new configuration key used to throttle decommissioning
 
 ---
 
-* [HDFS-7326](https://issues.apache.org/jira/browse/HDFS-7326) | *Minor* | **Add documentation for hdfs debug commands**
+* [HDFS-7270](https://issues.apache.org/jira/browse/HDFS-7270) | *Major* | **Add congestion signaling capability to DataNode write protocol**
 
-Added documentation for the hdfs debug commands to the following URL in the documentation website.
+Introduced a new configuration dfs.pipeline.ecn. When the configuration is turned on, DataNodes will signal in the writing pipelines when they are overloaded. The client can back off based on this congestion signal to avoid overloading the system.
 
-hadoop-project-dist/hadoop-hdfs/HDFSCommands.html
 
-In order to view the new documentation, build the website in a staging area:
-$ mvn clean site; mvn site:stage -DstagingDirectory=/tmp/hadoop-site
+---
+
+* [HDFS-7210](https://issues.apache.org/jira/browse/HDFS-7210) | *Major* | **Avoid two separate RPC's namenode.append() and namenode.getFileInfo() for an append call from DFSClient**
 
-Point your browser to 
-file:///tmp/hadoop-site/hadoop-project/hadoop-project-dist/hadoop-hdfs/HDFSCommands.html
+**WARNING: No release note provided for this incompatible change.**
 
 
 ---
@@ -220,9 +186,9 @@ file:///tmp/hadoop-site/hadoop-project/hadoop-project-dist/hadoop-hdfs/HDFSComma
 
 ---
 
-* [HDFS-6133](https://issues.apache.org/jira/browse/HDFS-6133) | *Major* | **Make Balancer support exclude specified path**
+* [HDFS-6133](https://issues.apache.org/jira/browse/HDFS-6133) | *Major* | **Add a feature for replica pinning so that a pinned replica will not be moved by Balancer/Mover.**
 
-Add a feature for replica pinning so that when a replica is pinned in a datanode, it will not be moved by Balancer/Mover.  The replica pinning feature can be enabled/disabled by "dfs.datanode.block-pinning.enabled", where the default is false.
+Add a feature for replica pinning so that when a replica is pinned in a datanode, it will not be moved by Balancer/Mover. The replica pinning feature can be enabled/disabled by "dfs.datanode.block-pinning.enabled", where the default is false.
 
 
 ---
@@ -252,6 +218,7 @@ Based on the reconfiguration framework provided by HADOOP-7001, enable reconfigu
 
 * [MAPREDUCE-5583](https://issues.apache.org/jira/browse/MAPREDUCE-5583) | *Major* | **Ability to limit running map and reduce tasks**
 
+<!-- markdown -->
 This introduces two new MR2 job configs, mentioned below, which allow users to control the maximum simultaneously-running tasks of the submitted job, across the cluster:
 
 * mapreduce.job.running.map.limit (default: 0, for no limit)
@@ -274,22 +241,4 @@ Removed commons-httpclient dependency from hadoop-yarn-server-web-proxy module.
 Applications which made use of the LogAggregationContext in their application will need to revisit this code in order to make sure that their logs continue to get rolled out.
 
 
----
-
-* [YARN-2230](https://issues.apache.org/jira/browse/YARN-2230) | *Minor* | **Fix description of yarn.scheduler.maximum-allocation-vcores in yarn-default.xml (or code)**
-
-I have modified the description of the yarn.scheduler.maximum-allocation-vcores setting in yarn-default.xml to be reflective of the actual behavior (throw InvalidRequestException when the limit is crossed).
-
-Since this is a documentation change, I have not added any test cases.
-
-Please review the patch, thanks!
-
-
----
-
-* [YARN-1904](https://issues.apache.org/jira/browse/YARN-1904) | *Major* | **Uniform the XXXXNotFound messages from ClientRMService and ApplicationHistoryClientService**
-
-I just committed this. Thanks Zhijie!
-
-
 


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