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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
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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  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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+++ 
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
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+++ 
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
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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
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+++ 
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
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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
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+++ 
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
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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
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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
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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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