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                                                   <h5>General</h5>
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                       <h5>Common</h5>
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                       <h5>HDFS</h5>
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                       <h5>MapReduce</h5>
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                       <h5>MapReduce REST APIs</h5>
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                       <h5>YARN</h5>
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                  <a href="../../../../hadoop-yarn/hadoop-yarn-site/YARN.html">Architecture</a>
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                  <a href="../../../../hadoop-yarn/hadoop-yarn-site/NodeLabel.html">Node Labels</a>
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                       <h5>YARN REST APIs</h5>
                  <ul>
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                  <a href="../../../../hadoop-yarn/hadoop-yarn-site/WebServicesIntro.html">Introduction</a>
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                  <a href="../../../../hadoop-yarn/hadoop-yarn-site/ResourceManagerRest.html">Resource Manager</a>
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                       <h5>YARN Service</h5>
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<h1>Apache Hadoop Changelog</h1><section>
<h2><a name="Release_2.6.1_-_2015-09-23"></a>Release 2.6.1 - 2015-09-23</h2><section>
<h3><a name="IMPROVEMENTS:"></a>IMPROVEMENTS:</h3>
<table border="0" class="bodyTable">
<thead>

<tr class="a">
<th align="left"> JIRA </th>
<th align="left"> Summary </th>
<th align="left"> Priority </th>
<th align="left"> Component </th>
<th align="left"> Reporter </th>
<th align="left"> Contributor </th></tr>
</thead><tbody>

<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7278">HDFS-7278</a> </td>
<td align="left"> Add a command that allows sysadmins to manually trigger full block reports from a DN </td>
<td align="left">  Major </td>
<td align="left"> datanode </td>
<td align="left"> Colin P. McCabe </td>
<td align="left"> Colin P. McCabe </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2301">YARN-2301</a> </td>
<td align="left"> Improve yarn container command </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Jian He </td>
<td align="left"> Naganarasimha G R </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7531">HDFS-7531</a> </td>
<td align="left"> Improve the concurrent access on FsVolumeList </td>
<td align="left">  Major </td>
<td align="left"> datanode </td>
<td align="left"> Lei (Eddy) Xu </td>
<td align="left"> Lei (Eddy) Xu </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7579">HDFS-7579</a> </td>
<td align="left"> Improve log reporting during block report rpc failure </td>
<td align="left">  Minor </td>
<td align="left"> datanode </td>
<td align="left"> Charles Lamb </td>
<td align="left"> Charles Lamb </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7446">HDFS-7446</a> </td>
<td align="left"> HDFS inotify should have the ability to determine what txid it has read up to </td>
<td align="left">  Major </td>
<td align="left"> hdfs-client </td>
<td align="left"> Colin P. McCabe </td>
<td align="left"> Colin P. McCabe </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7182">HDFS-7182</a> </td>
<td align="left"> JMX metrics aren&#x2019;t accessible when NN is busy </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Ming Ma </td>
<td align="left"> Ming Ma </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11466">HADOOP-11466</a> </td>
<td align="left"> FastByteComparisons: do not use UNSAFE_COMPARER on the SPARC architecture because it is slower there </td>
<td align="left">  Minor </td>
<td align="left"> io, performance, util </td>
<td align="left"> Suman Somasundar </td>
<td align="left"> Suman Somasundar </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11506">HADOOP-11506</a> </td>
<td align="left"> Configuration variable expansion regex expensive for long values </td>
<td align="left">  Major </td>
<td align="left"> conf </td>
<td align="left"> Dmitriy V. Ryaboy </td>
<td align="left"> Gera Shegalov </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3230">YARN-3230</a> </td>
<td align="left"> Clarify application states on the web UI </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Jian He </td>
<td align="left"> Jian He </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-6267">MAPREDUCE-6267</a> </td>
<td align="left"> Refactor JobSubmitter#copyAndConfigureFiles into it&#x2019;s own class </td>
<td align="left">  Minor </td>
<td align="left"> . </td>
<td align="left"> Chris Trezzo </td>
<td align="left"> Chris Trezzo </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3249">YARN-3249</a> </td>
<td align="left"> Add a &#x201c;kill application&#x201d; button to Resource Manager&#x2019;s Web UI </td>
<td align="left">  Minor </td>
<td align="left"> resourcemanager </td>
<td align="left"> Ryu Kobayashi </td>
<td align="left"> Ryu Kobayashi </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3248">YARN-3248</a> </td>
<td align="left"> Display count of nodes blacklisted by apps in the web UI </td>
<td align="left">  Major </td>
<td align="left"> capacityscheduler, resourcemanager </td>
<td align="left"> Varun Vasudev </td>
<td align="left"> Varun Vasudev </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11812">HADOOP-11812</a> </td>
<td align="left"> Implement listLocatedStatus for ViewFileSystem to speed up split calculation </td>
<td align="left">  Blocker </td>
<td align="left"> fs </td>
<td align="left"> Gera Shegalov </td>
<td align="left"> Gera Shegalov </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-7139">HADOOP-7139</a> </td>
<td align="left"> Allow appending to existing SequenceFiles </td>
<td align="left">  Major </td>
<td align="left"> io </td>
<td align="left"> Stephen Rose </td>
<td align="left"> Kanaka Kumar Avvaru </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7314">HDFS-7314</a> </td>
<td align="left"> When the DFSClient lease cannot be renewed, abort open-for-write files rather than the entire DFSClient </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Ming Ma </td>
<td align="left"> Ming Ma </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3978">YARN-3978</a> </td>
<td align="left"> Configurably turn off the saving of container info in Generic AHS </td>
<td align="left">  Major </td>
<td align="left"> timelineserver, yarn </td>
<td align="left"> Eric Payne </td>
<td align="left"> Eric Payne </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-12280">HADOOP-12280</a> </td>
<td align="left"> Skip unit tests based on maven profile rather than NativeCodeLoader.isNativeCodeLoaded </td>
<td align="left">  Minor </td>
<td align="left"> test </td>
<td align="left"> Masatake Iwasaki </td>
<td align="left"> Masatake Iwasaki </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8384">HDFS-8384</a> </td>
<td align="left"> Allow NN to startup if there are files having a lease but are not under construction </td>
<td align="left">  Minor </td>
<td align="left"> namenode </td>
<td align="left"> Tsz Wo Nicholas Sze </td>
<td align="left"> Jing Zhao </td></tr>
</tbody>
</table></section><section>
<h3><a name="BUG_FIXES:"></a>BUG FIXES:</h3>
<table border="0" class="bodyTable">
<thead>

<tr class="a">
<th align="left"> JIRA </th>
<th align="left"> Summary </th>
<th align="left"> Priority </th>
<th align="left"> Component </th>
<th align="left"> Reporter </th>
<th align="left"> Contributor </th></tr>
</thead><tbody>

<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7213">HDFS-7213</a> </td>
<td align="left"> processIncrementalBlockReport performance degradation </td>
<td align="left">  Critical </td>
<td align="left"> namenode </td>
<td align="left"> Daryn Sharp </td>
<td align="left"> Eric Payne </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7235">HDFS-7235</a> </td>
<td align="left"> DataNode#transferBlock should report blocks that don&#x2019;t exist using reportBadBlock </td>
<td align="left">  Major </td>
<td align="left"> datanode, namenode </td>
<td align="left"> Yongjun Zhang </td>
<td align="left"> Yongjun Zhang </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7263">HDFS-7263</a> </td>
<td align="left"> Snapshot read can reveal future bytes for appended files. </td>
<td align="left">  Major </td>
<td align="left"> hdfs-client </td>
<td align="left"> Konstantin Shvachko </td>
<td align="left"> Tao Luo </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-10786">HADOOP-10786</a> </td>
<td align="left"> Fix UGI#reloginFromKeytab on Java 8 </td>
<td align="left">  Major </td>
<td align="left"> security </td>
<td align="left"> Tobi Vollebregt </td>
<td align="left"> Stephen Chu </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2856">YARN-2856</a> </td>
<td align="left"> Application recovery throw InvalidStateTransitonException: Invalid event: ATTEMPT_KILLED at ACCEPTED </td>
<td align="left">  Critical </td>
<td align="left"> resourcemanager </td>
<td align="left"> Rohith Sharma K S </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2816">YARN-2816</a> </td>
<td align="left"> NM fail to start with NPE during container recovery </td>
<td align="left">  Major </td>
<td align="left"> nodemanager </td>
<td align="left"> zhihai xu </td>
<td align="left"> zhihai xu </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2414">YARN-2414</a> </td>
<td align="left"> RM web UI: app page will crash if app is failed before any attempt has been created </td>
<td align="left">  Major </td>
<td align="left"> webapp </td>
<td align="left"> Zhijie Shen </td>
<td align="left"> Wangda Tan </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7225">HDFS-7225</a> </td>
<td align="left"> Remove stale block invalidation work when DN re-registers with different UUID </td>
<td align="left">  Major </td>
<td align="left"> namenode </td>
<td align="left"> Zhe Zhang </td>
<td align="left"> Zhe Zhang </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2865">YARN-2865</a> </td>
<td align="left"> Application recovery continuously fails with &#x201c;Application with id already present. Cannot duplicate&#x201d; </td>
<td align="left">  Critical </td>
<td align="left"> resourcemanager </td>
<td align="left"> Rohith Sharma K S </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7425">HDFS-7425</a> </td>
<td align="left"> NameNode block deletion logging uses incorrect appender. </td>
<td align="left">  Minor </td>
<td align="left"> namenode </td>
<td align="left"> Chris Nauroth </td>
<td align="left"> Chris Nauroth </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-4882">HDFS-4882</a> </td>
<td align="left"> Prevent the Namenode&#x2019;s LeaseManager from looping forever in checkLeases </td>
<td align="left">  Critical </td>
<td align="left"> hdfs-client, namenode </td>
<td align="left"> Zesheng Wu </td>
<td align="left"> Ravi Prakash </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2906">YARN-2906</a> </td>
<td align="left"> CapacitySchedulerPage shows HTML tags for a queue&#x2019;s Active Users </td>
<td align="left">  Major </td>
<td align="left"> capacityscheduler </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Jason Lowe </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11333">HADOOP-11333</a> </td>
<td align="left"> Fix deadlock in DomainSocketWatcher when the notification pipe is full </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> yunjiong zhao </td>
<td align="left"> yunjiong zhao </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2905">YARN-2905</a> </td>
<td align="left"> AggregatedLogsBlock page can infinitely loop if the aggregated log file is corrupted </td>
<td align="left">  Blocker </td>
<td align="left"> . </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Varun Saxena </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2894">YARN-2894</a> </td>
<td align="left"> When ACL&#x2019;s are enabled, if RM switches then application can not be viewed from web. </td>
<td align="left">  Major </td>
<td align="left"> resourcemanager </td>
<td align="left"> Rohith Sharma K S </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2874">YARN-2874</a> </td>
<td align="left"> Dead lock in &#x201c;DelegationTokenRenewer&#x201d; which blocks RM to execute any further apps </td>
<td align="left">  Blocker </td>
<td align="left"> resourcemanager </td>
<td align="left"> Naganarasimha G R </td>
<td align="left"> Naganarasimha G R </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11343">HADOOP-11343</a> </td>
<td align="left"> Overflow is not properly handled in caclulating final iv for AES CTR </td>
<td align="left">  Blocker </td>
<td align="left"> security </td>
<td align="left"> Haifeng Chen </td>
<td align="left"> Haifeng Chen </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11368">HADOOP-11368</a> </td>
<td align="left"> Fix SSLFactory truststore reloader thread leak in KMSClientProvider </td>
<td align="left">  Major </td>
<td align="left"> kms </td>
<td align="left"> Arun Suresh </td>
<td align="left"> Arun Suresh </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7489">HDFS-7489</a> </td>
<td align="left"> Incorrect locking in FsVolumeList#checkDirs can hang datanodes </td>
<td align="left">  Critical </td>
<td align="left"> datanode </td>
<td align="left"> Noah Lorang </td>
<td align="left"> Noah Lorang </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2910">YARN-2910</a> </td>
<td align="left"> FSLeafQueue can throw ConcurrentModificationException </td>
<td align="left">  Major </td>
<td align="left"> fairscheduler </td>
<td align="left"> Wilfred Spiegelenburg </td>
<td align="left"> Wilfred Spiegelenburg </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7503">HDFS-7503</a> </td>
<td align="left"> Namenode restart after large deletions can cause slow processReport (due to logging) </td>
<td align="left">  Major </td>
<td align="left"> namenode </td>
<td align="left"> Arpit Agarwal </td>
<td align="left"> Arpit Agarwal </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2917">YARN-2917</a> </td>
<td align="left"> Potential deadlock in AsyncDispatcher when system.exit called in AsyncDispatcher#dispatch and AsyscDispatcher#serviceStop from shutdown hook </td>
<td align="left">  Critical </td>
<td align="left"> resourcemanager </td>
<td align="left"> Rohith Sharma K S </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11238">HADOOP-11238</a> </td>
<td align="left"> Update the NameNode&#x2019;s Group Cache in the background when possible </td>
<td align="left">  Minor </td>
<td align="left"> . </td>
<td align="left"> Chris Li </td>
<td align="left"> Chris Li </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-6166">MAPREDUCE-6166</a> </td>
<td align="left"> Reducers do not validate checksum of map outputs when fetching directly to disk </td>
<td align="left">  Major </td>
<td align="left"> mrv2 </td>
<td align="left"> Eric Payne </td>
<td align="left"> Eric Payne </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2964">YARN-2964</a> </td>
<td align="left"> RM prematurely cancels tokens for jobs that submit jobs (oozie) </td>
<td align="left">  Blocker </td>
<td align="left"> resourcemanager </td>
<td align="left"> Daryn Sharp </td>
<td align="left"> Jian He </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7552">HDFS-7552</a> </td>
<td align="left"> change FsVolumeList toString() to fix TestDataNodeVolumeFailureToleration </td>
<td align="left">  Major </td>
<td align="left"> datanode, test </td>
<td align="left"> Liang Xie </td>
<td align="left"> Liang Xie </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7443">HDFS-7443</a> </td>
<td align="left"> Datanode upgrade to BLOCKID_BASED_LAYOUT fails if duplicate block files are present in the same volume </td>
<td align="left">  Blocker </td>
<td align="left"> . </td>
<td align="left"> Kihwal Lee </td>
<td align="left"> Colin P. McCabe </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2952">YARN-2952</a> </td>
<td align="left"> Incorrect version check in RMStateStore </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Jian He </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2340">YARN-2340</a> </td>
<td align="left"> NPE thrown when RM restart after queue is STOPPED. There after RM can not recovery application&#x2019;s and remain in standby </td>
<td align="left">  Critical </td>
<td align="left"> resourcemanager, scheduler </td>
<td align="left"> Nishan Shetty </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2992">YARN-2992</a> </td>
<td align="left"> ZKRMStateStore crashes due to session expiry </td>
<td align="left">  Blocker </td>
<td align="left"> resourcemanager </td>
<td align="left"> Karthik Kambatla </td>
<td align="left"> Karthik Kambatla </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2922">YARN-2922</a> </td>
<td align="left"> ConcurrentModificationException in CapacityScheduler&#x2019;s LeafQueue </td>
<td align="left">  Major </td>
<td align="left"> capacityscheduler, resourcemanager, scheduler </td>
<td align="left"> Jason Tufo </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2978">YARN-2978</a> </td>
<td align="left"> ResourceManager crashes with NPE while getting queue info </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Jason Tufo </td>
<td align="left"> Varun Saxena </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2997">YARN-2997</a> </td>
<td align="left"> NM keeps sending already-sent completed containers to RM until containers are removed from context </td>
<td align="left">  Major </td>
<td align="left"> nodemanager </td>
<td align="left"> Chengbing Liu </td>
<td align="left"> Chengbing Liu </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7596">HDFS-7596</a> </td>
<td align="left"> NameNode should prune dead storages from storageMap </td>
<td align="left">  Major </td>
<td align="left"> namenode </td>
<td align="left"> Arpit Agarwal </td>
<td align="left"> Arpit Agarwal </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7533">HDFS-7533</a> </td>
<td align="left"> Datanode sometimes does not shutdown on receiving upgrade shutdown command </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Kihwal Lee </td>
<td align="left"> Eric Payne </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7470">HDFS-7470</a> </td>
<td align="left"> SecondaryNameNode need twice memory when calling reloadFromImageFile </td>
<td align="left">  Major </td>
<td align="left"> namenode </td>
<td align="left"> yunjiong zhao </td>
<td align="left"> yunjiong zhao </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2637">YARN-2637</a> </td>
<td align="left"> maximum-am-resource-percent could be respected for both LeafQueue/User when trying to activate applications. </td>
<td align="left">  Critical </td>
<td align="left"> resourcemanager </td>
<td align="left"> Wangda Tan </td>
<td align="left"> Craig Welch </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11350">HADOOP-11350</a> </td>
<td align="left"> The size of header buffer of HttpServer is too small when HTTPS is enabled </td>
<td align="left">  Major </td>
<td align="left"> security </td>
<td align="left"> Benoy Antony </td>
<td align="left"> Benoy Antony </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7610">HDFS-7610</a> </td>
<td align="left"> Fix removal of dynamically added DN volumes </td>
<td align="left">  Major </td>
<td align="left"> datanode </td>
<td align="left"> Lei (Eddy) Xu </td>
<td align="left"> Lei (Eddy) Xu </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-3443">HDFS-3443</a> </td>
<td align="left"> Fix NPE when namenode transition to active during startup by adding checkNNStartup() in NameNodeRpcServer </td>
<td align="left">  Major </td>
<td align="left"> auto-failover, ha </td>
<td align="left"> suja s </td>
<td align="left"> Vinayakumar B </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7575">HDFS-7575</a> </td>
<td align="left"> Upgrade should generate a unique storage ID for each volume </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Lars Francke </td>
<td align="left"> Arpit Agarwal </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11482">HADOOP-11482</a> </td>
<td align="left"> Use correct UGI when KMSClientProvider is called by a proxy user </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Arun Suresh </td>
<td align="left"> Arun Suresh </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3024">YARN-3024</a> </td>
<td align="left"> LocalizerRunner should give DIE action when all resources are localized </td>
<td align="left">  Major </td>
<td align="left"> nodemanager </td>
<td align="left"> Chengbing Liu </td>
<td align="left"> Chengbing Liu </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11316">HADOOP-11316</a> </td>
<td align="left"> &#x201c;mvn package -Pdist,docs -DskipTests -Dtar&#x201d; fails because of non-ascii characters </td>
<td align="left">  Blocker </td>
<td align="left"> . </td>
<td align="left"> Tsuyoshi Ozawa </td>
<td align="left"> Tsuyoshi Ozawa </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3103">YARN-3103</a> </td>
<td align="left"> AMRMClientImpl does not update AMRM token properly </td>
<td align="left">  Blocker </td>
<td align="left"> client </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Jason Lowe </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-6230">MAPREDUCE-6230</a> </td>
<td align="left"> MR AM does not survive RM restart if RM activated a new AMRM secret key </td>
<td align="left">  Blocker </td>
<td align="left"> mr-am </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Jason Lowe </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7707">HDFS-7707</a> </td>
<td align="left"> Edit log corruption due to delayed block removal again </td>
<td align="left">  Major </td>
<td align="left"> namenode </td>
<td align="left"> Yongjun Zhang </td>
<td align="left"> Yongjun Zhang </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7733">HDFS-7733</a> </td>
<td align="left"> NFS: readdir/readdirplus return null directory attribute on failure </td>
<td align="left">  Major </td>
<td align="left"> nfs </td>
<td align="left"> Arpit Agarwal </td>
<td align="left"> Arpit Agarwal </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-6237">MAPREDUCE-6237</a> </td>
<td align="left"> Multiple mappers with DBInputFormat don&#x2019;t work because of reusing conections </td>
<td align="left">  Major </td>
<td align="left"> mrv2 </td>
<td align="left"> Kannan Rajah </td>
<td align="left"> Kannan Rajah </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3094">YARN-3094</a> </td>
<td align="left"> reset timer for liveness monitors after RM recovery </td>
<td align="left">  Major </td>
<td align="left"> resourcemanager </td>
<td align="left"> Jun Gong </td>
<td align="left"> Jun Gong </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7714">HDFS-7714</a> </td>
<td align="left"> Simultaneous restart of HA NameNodes and DataNode can cause DataNode to register successfully with only one NameNode. </td>
<td align="left">  Major </td>
<td align="left"> datanode </td>
<td align="left"> Chris Nauroth </td>
<td align="left"> Vinayakumar B </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2246">YARN-2246</a> </td>
<td align="left"> Job History Link in RM UI is redirecting to the URL which contains Job Id twice </td>
<td align="left">  Major </td>
<td align="left"> webapp </td>
<td align="left"> Devaraj K </td>
<td align="left"> Devaraj K </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11295">HADOOP-11295</a> </td>
<td align="left"> RPC Server Reader thread can&#x2019;t shutdown if RPCCallQueue is full </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Ming Ma </td>
<td align="left"> Ming Ma </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7788">HDFS-7788</a> </td>
<td align="left"> Post-2.6 namenode may not start up with an image containing inodes created with an old release. </td>
<td align="left">  Blocker </td>
<td align="left"> . </td>
<td align="left"> Kihwal Lee </td>
<td align="left"> Rushabh S Shah </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11604">HADOOP-11604</a> </td>
<td align="left"> Prevent ConcurrentModificationException while closing domain sockets during shutdown of DomainSocketWatcher thread. </td>
<td align="left">  Critical </td>
<td align="left"> net </td>
<td align="left"> Liang Xie </td>
<td align="left"> Chris Nauroth </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3238">YARN-3238</a> </td>
<td align="left"> Connection timeouts to nodemanagers are retried at multiple levels </td>
<td align="left">  Blocker </td>
<td align="left"> . </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Jason Lowe </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3207">YARN-3207</a> </td>
<td align="left"> secondary filter matches entites which do not have the key being filtered for. </td>
<td align="left">  Major </td>
<td align="left"> timelineserver </td>
<td align="left"> Prakash Ramachandran </td>
<td align="left"> Zhijie Shen </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7009">HDFS-7009</a> </td>
<td align="left"> Active NN and standby NN have different live nodes </td>
<td align="left">  Major </td>
<td align="left"> datanode </td>
<td align="left"> Ming Ma </td>
<td align="left"> Ming Ma </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7763">HDFS-7763</a> </td>
<td align="left"> fix zkfc hung issue due to not catching exception in a corner case </td>
<td align="left">  Major </td>
<td align="left"> ha </td>
<td align="left"> Liang Xie </td>
<td align="left"> Liang Xie </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3239">YARN-3239</a> </td>
<td align="left"> WebAppProxy does not support a final tracking url which has query fragments and params </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Hitesh Shah </td>
<td align="left"> Jian He </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3251">YARN-3251</a> </td>
<td align="left"> Fix CapacityScheduler deadlock when computing absolute max avail capacity (short term fix for 2.6.1) </td>
<td align="left">  Blocker </td>
<td align="left"> . </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Craig Welch </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7871">HDFS-7871</a> </td>
<td align="left"> NameNodeEditLogRoller can keep printing &#x201c;Swallowing exception&#x201d; message </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Jing Zhao </td>
<td align="left"> Jing Zhao </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3222">YARN-3222</a> </td>
<td align="left"> RMNodeImpl#ReconnectNodeTransition should send scheduler events in sequential order </td>
<td align="left">  Critical </td>
<td align="left"> resourcemanager </td>
<td align="left"> Rohith Sharma K S </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3231">YARN-3231</a> </td>
<td align="left"> FairScheduler: Changing queueMaxRunningApps interferes with pending jobs </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Siqi Li </td>
<td align="left"> Siqi Li </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3242">YARN-3242</a> </td>
<td align="left"> Asynchrony in ZK-close can lead to ZKRMStateStore watcher receiving events for old client </td>
<td align="left">  Critical </td>
<td align="left"> resourcemanager </td>
<td align="left"> zhihai xu </td>
<td align="left"> zhihai xu </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11674">HADOOP-11674</a> </td>
<td align="left"> oneByteBuf in CryptoInputStream and CryptoOutputStream should be non static </td>
<td align="left">  Critical </td>
<td align="left"> io </td>
<td align="left"> Sean Busbey </td>
<td align="left"> Sean Busbey </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7885">HDFS-7885</a> </td>
<td align="left"> Datanode should not trust the generation stamp provided by client </td>
<td align="left">  Critical </td>
<td align="left"> datanode </td>
<td align="left"> vitthal (Suhas) Gogate </td>
<td align="left"> Tsz Wo Nicholas Sze </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3227">YARN-3227</a> </td>
<td align="left"> Timeline renew delegation token fails when RM user&#x2019;s TGT is expired </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Jonathan Eagles </td>
<td align="left"> Zhijie Shen </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3287">YARN-3287</a> </td>
<td align="left"> TimelineClient kerberos authentication failure uses wrong login context. </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Jonathan Eagles </td>
<td align="left"> Daryn Sharp </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7830">HDFS-7830</a> </td>
<td align="left"> DataNode does not release the volume lock when adding a volume fails. </td>
<td align="left">  Major </td>
<td align="left"> datanode </td>
<td align="left"> Lei (Eddy) Xu </td>
<td align="left"> Lei (Eddy) Xu </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3267">YARN-3267</a> </td>
<td align="left"> Timelineserver applies the ACL rules after applying the limit on the number of records </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Prakash Ramachandran </td>
<td align="left"> Chang Li </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7915">HDFS-7915</a> </td>
<td align="left"> The DataNode can sometimes allocate a ShortCircuitShm slot and fail to tell the DFSClient about it because of a network error </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Colin P. McCabe </td>
<td align="left"> Colin P. McCabe </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7929">HDFS-7929</a> </td>
<td align="left"> inotify unable fetch pre-upgrade edit log segments once upgrade starts </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Zhe Zhang </td>
<td align="left"> Zhe Zhang </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7587">HDFS-7587</a> </td>
<td align="left"> Edit log corruption can happen if append fails with a quota violation </td>
<td align="left">  Blocker </td>
<td align="left"> namenode </td>
<td align="left"> Kihwal Lee </td>
<td align="left"> Jing Zhao </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7930">HDFS-7930</a> </td>
<td align="left"> commitBlockSynchronization() does not remove locations </td>
<td align="left">  Blocker </td>
<td align="left"> namenode </td>
<td align="left"> Konstantin Shvachko </td>
<td align="left"> Yi Liu </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3369">YARN-3369</a> </td>
<td align="left"> Missing NullPointer check in AppSchedulingInfo causes RM to die </td>
<td align="left">  Blocker </td>
<td align="left"> resourcemanager </td>
<td align="left"> Giovanni Matteo Fumarola </td>
<td align="left"> Brahma Reddy Battula </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3393">YARN-3393</a> </td>
<td align="left"> Getting application(s) goes wrong when app finishes before starting the attempt </td>
<td align="left">  Critical </td>
<td align="left"> timelineserver </td>
<td align="left"> Zhijie Shen </td>
<td align="left"> Zhijie Shen </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7884">HDFS-7884</a> </td>
<td align="left"> NullPointerException in BlockSender </td>
<td align="left">  Blocker </td>
<td align="left"> datanode </td>
<td align="left"> Tsz Wo Nicholas Sze </td>
<td align="left"> Brahma Reddy Battula </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7960">HDFS-7960</a> </td>
<td align="left"> The full block report should prune zombie storages even if they&#x2019;re not empty </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Lei (Eddy) Xu </td>
<td align="left"> Colin P. McCabe </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7742">HDFS-7742</a> </td>
<td align="left"> favoring decommissioning node for replication can cause a block to stay underreplicated for long periods </td>
<td align="left">  Major </td>
<td align="left"> namenode </td>
<td align="left"> Nathan Roberts </td>
<td align="left"> Nathan Roberts </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-6303">MAPREDUCE-6303</a> </td>
<td align="left"> Read timeout when retrying a fetch error can be fatal to a reducer </td>
<td align="left">  Blocker </td>
<td align="left"> . </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Jason Lowe </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7999">HDFS-7999</a> </td>
<td align="left"> FsDatasetImpl#createTemporary sometimes holds the FSDatasetImpl lock for a very long time </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> zhouyingchao </td>
<td align="left"> zhouyingchao </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8072">HDFS-8072</a> </td>
<td align="left"> Reserved RBW space is not released if client terminates while writing block </td>
<td align="left">  Major </td>
<td align="left"> datanode </td>
<td align="left"> Arpit Agarwal </td>
<td align="left"> Arpit Agarwal </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8046">HDFS-8046</a> </td>
<td align="left"> Allow better control of getContentSummary </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Kihwal Lee </td>
<td align="left"> Kihwal Lee </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2890">YARN-2890</a> </td>
<td align="left"> MiniYarnCluster should turn on timeline service if configured to do so </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Mit Desai </td>
<td align="left"> Mit Desai </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3055">YARN-3055</a> </td>
<td align="left"> The token is not renewed properly if it&#x2019;s shared by jobs (oozie) in DelegationTokenRenewer </td>
<td align="left">  Blocker </td>
<td align="left"> security </td>
<td align="left"> Yi Liu </td>
<td align="left"> Daryn Sharp </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8127">HDFS-8127</a> </td>
<td align="left"> NameNode Failover during HA upgrade can cause DataNode to finalize upgrade </td>
<td align="left">  Blocker </td>
<td align="left"> ha </td>
<td align="left"> Jing Zhao </td>
<td align="left"> Jing Zhao </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-6300">MAPREDUCE-6300</a> </td>
<td align="left"> Task list sort by task id broken </td>
<td align="left">  Minor </td>
<td align="left"> . </td>
<td align="left"> Siqi Li </td>
<td align="left"> Siqi Li </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3493">YARN-3493</a> </td>
<td align="left"> RM fails to come up with error &#x201c;Failed to load/recover state&#x201d; when  mem settings are changed </td>
<td align="left">  Critical </td>
<td align="left"> yarn </td>
<td align="left"> Sumana Sathish </td>
<td align="left"> Jian He </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-6238">MAPREDUCE-6238</a> </td>
<td align="left"> MR2 can&#x2019;t run local jobs with -libjars command options which is a regression from MR1 </td>
<td align="left">  Critical </td>
<td align="left"> mrv2 </td>
<td align="left"> zhihai xu </td>
<td align="left"> zhihai xu </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11730">HADOOP-11730</a> </td>
<td align="left"> Regression: s3n read failure recovery broken </td>
<td align="left">  Major </td>
<td align="left"> fs/s3 </td>
<td align="left"> Takenori Sato </td>
<td align="left"> Takenori Sato </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11802">HADOOP-11802</a> </td>
<td align="left"> DomainSocketWatcher thread terminates sometimes after there is an I/O error during requestShortCircuitShm </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Eric Payne </td>
<td align="left"> Colin P. McCabe </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8070">HDFS-8070</a> </td>
<td align="left"> Pre-HDFS-7915 DFSClient cannot use short circuit on post-HDFS-7915 DataNode </td>
<td align="left">  Blocker </td>
<td align="left"> caching </td>
<td align="left"> Gopal V </td>
<td align="left"> Colin P. McCabe </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3464">YARN-3464</a> </td>
<td align="left"> Race condition in LocalizerRunner kills localizer before localizing all resources </td>
<td align="left">  Critical </td>
<td align="left"> nodemanager </td>
<td align="left"> zhihai xu </td>
<td align="left"> zhihai xu </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-6324">MAPREDUCE-6324</a> </td>
<td align="left"> Uber jobs fail to update AMRM token when it rolls over </td>
<td align="left">  Blocker </td>
<td align="left"> mr-am </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Jason Lowe </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11491">HADOOP-11491</a> </td>
<td align="left"> HarFs incorrectly declared as requiring an authority </td>
<td align="left">  Critical </td>
<td align="left"> fs </td>
<td align="left"> Gera Shegalov </td>
<td align="left"> Brahma Reddy Battula </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-5649">MAPREDUCE-5649</a> </td>
<td align="left"> Reduce cannot use more than 2G memory  for the final merge </td>
<td align="left">  Major </td>
<td align="left"> mrv2 </td>
<td align="left"> stanley shi </td>
<td align="left"> Gera Shegalov </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8219">HDFS-8219</a> </td>
<td align="left"> setStoragePolicy with folder behavior is different after cluster restart </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Peter Shi </td>
<td align="left"> Surendra Singh Lilhore </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7980">HDFS-7980</a> </td>
<td align="left"> Incremental BlockReport will dramatically slow down the startup of  a namenode </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Hui Zheng </td>
<td align="left"> Walter Su </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7894">HDFS-7894</a> </td>
<td align="left"> Rolling upgrade readiness is not updated in jmx until query command is issued. </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Kihwal Lee </td>
<td align="left"> Brahma Reddy Battula </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8245">HDFS-8245</a> </td>
<td align="left"> Standby namenode doesn&#x2019;t process DELETED_BLOCK if the add block request is in edit log. </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Rushabh S Shah </td>
<td align="left"> Rushabh S Shah </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/MAPREDUCE-6361">MAPREDUCE-6361</a> </td>
<td align="left"> NPE issue in shuffle caused by concurrent issue between copySucceeded() in one thread and copyFailed() in another thread on the same host </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Junping Du </td>
<td align="left"> Junping Du </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3526">YARN-3526</a> </td>
<td align="left"> ApplicationMaster tracking URL is incorrectly redirected on a QJM cluster </td>
<td align="left">  Major </td>
<td align="left"> resourcemanager, webapp </td>
<td align="left"> Weiwei Yang </td>
<td align="left"> Weiwei Yang </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8404">HDFS-8404</a> </td>
<td align="left"> Pending block replication can get stuck using older genstamp </td>
<td align="left">  Major </td>
<td align="left"> namenode </td>
<td align="left"> Nathan Roberts </td>
<td align="left"> Nathan Roberts </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8431">HDFS-8431</a> </td>
<td align="left"> hdfs crypto class not found in Windows </td>
<td align="left">  Critical </td>
<td align="left"> scripts </td>
<td align="left"> Sumana Sathish </td>
<td align="left"> Anu Engineer </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11934">HADOOP-11934</a> </td>
<td align="left"> Use of JavaKeyStoreProvider in LdapGroupsMapping causes infinite loop </td>
<td align="left">  Blocker </td>
<td align="left"> security </td>
<td align="left"> Mike Yoder </td>
<td align="left"> Larry McCay </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7609">HDFS-7609</a> </td>
<td align="left"> Avoid retry cache collision when Standby NameNode loading edits </td>
<td align="left">  Critical </td>
<td align="left"> namenode </td>
<td align="left"> Carrey Zhan </td>
<td align="left"> Ming Ma </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3725">YARN-3725</a> </td>
<td align="left"> App submission via REST API is broken in secure mode due to Timeline DT service address is empty </td>
<td align="left">  Blocker </td>
<td align="left"> resourcemanager, timelineserver </td>
<td align="left"> Zhijie Shen </td>
<td align="left"> Zhijie Shen </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8486">HDFS-8486</a> </td>
<td align="left"> DN startup may cause severe data loss </td>
<td align="left">  Blocker </td>
<td align="left"> datanode </td>
<td align="left"> Daryn Sharp </td>
<td align="left"> Daryn Sharp </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8270">HDFS-8270</a> </td>
<td align="left"> create() always retried with hardcoded timeout when file already exists with open lease </td>
<td align="left">  Major </td>
<td align="left"> hdfs-client </td>
<td align="left"> Andrey Stepachev </td>
<td align="left"> J.Andreina </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3585">YARN-3585</a> </td>
<td align="left"> NodeManager cannot exit on SHUTDOWN event triggered and NM recovery is enabled </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Peng Zhang </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3733">YARN-3733</a> </td>
<td align="left"> Fix DominantRC#compare() does not work as expected if cluster resource is empty </td>
<td align="left">  Blocker </td>
<td align="left"> resourcemanager </td>
<td align="left"> Bibin A Chundatt </td>
<td align="left"> Rohith Sharma K S </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8480">HDFS-8480</a> </td>
<td align="left"> Fix performance and timeout issues in HDFS-7929 by using hard-links to preserve old edit logs instead of copying them </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Zhe Zhang </td>
<td align="left"> Zhe Zhang </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3832">YARN-3832</a> </td>
<td align="left"> Resource Localization fails on a cluster due to existing cache directories </td>
<td align="left">  Critical </td>
<td align="left"> nodemanager </td>
<td align="left"> Ranga Swamy </td>
<td align="left"> Brahma Reddy Battula </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-8151">HADOOP-8151</a> </td>
<td align="left"> Error handling in snappy decompressor throws invalid exceptions </td>
<td align="left">  Major </td>
<td align="left"> io, native </td>
<td align="left"> Todd Lipcon </td>
<td align="left"> Matt Foley </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3850">YARN-3850</a> </td>
<td align="left"> NM fails to read files from full disks which can lead to container logs being lost and other issues </td>
<td align="left">  Blocker </td>
<td align="left"> log-aggregation, nodemanager </td>
<td align="left"> Varun Saxena </td>
<td align="left"> Varun Saxena </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3990">YARN-3990</a> </td>
<td align="left"> AsyncDispatcher may overloaded with RMAppNodeUpdateEvent when Node is connected/disconnected </td>
<td align="left">  Critical </td>
<td align="left"> resourcemanager </td>
<td align="left"> Rohith Sharma K S </td>
<td align="left"> Bibin A Chundatt </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11932">HADOOP-11932</a> </td>
<td align="left">  MetricsSinkAdapter hangs when being stopped </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Jian He </td>
<td align="left"> Brahma Reddy Battula </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3999">YARN-3999</a> </td>
<td align="left"> RM hangs on draining events </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Jian He </td>
<td align="left"> Jian He </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-4047">YARN-4047</a> </td>
<td align="left"> ClientRMService getApplications has high scheduler lock contention </td>
<td align="left">  Major </td>
<td align="left"> resourcemanager </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Jason Lowe </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8863">HDFS-8863</a> </td>
<td align="left"> The remaining space check in BlockPlacementPolicyDefault is flawed </td>
<td align="left">  Critical </td>
<td align="left"> . </td>
<td align="left"> Kihwal Lee </td>
<td align="left"> Kihwal Lee </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-8846">HDFS-8846</a> </td>
<td align="left"> Add a unit test for INotify functionality across a layout version upgrade </td>
<td align="left">  Major </td>
<td align="left"> namenode </td>
<td align="left"> Zhe Zhang </td>
<td align="left"> Zhe Zhang </td></tr>
</tbody>
</table></section><section>
<h3><a name="SUB-TASKS:"></a>SUB-TASKS:</h3>
<table border="0" class="bodyTable">
<thead>

<tr class="a">
<th align="left"> JIRA </th>
<th align="left"> Summary </th>
<th align="left"> Priority </th>
<th align="left"> Component </th>
<th align="left"> Reporter </th>
<th align="left"> Contributor </th></tr>
</thead><tbody>

<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HDFS-7035">HDFS-7035</a> </td>
<td align="left"> Make adding a new data directory to the DataNode an atomic operation and improve error handling </td>
<td align="left">  Major </td>
<td align="left"> datanode </td>
<td align="left"> Lei (Eddy) Xu </td>
<td align="left"> Lei (Eddy) Xu </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2766">YARN-2766</a> </td>
<td align="left">  ApplicationHistoryManager is expected to return a sorted list of apps/attempts/containers </td>
<td align="left">  Major </td>
<td align="left"> timelineserver </td>
<td align="left"> Robert Kanter </td>
<td align="left"> Robert Kanter </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-1984">YARN-1984</a> </td>
<td align="left"> LeveldbTimelineStore does not handle db exceptions properly </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Varun Saxena </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2920">YARN-2920</a> </td>
<td align="left"> CapacityScheduler should be notified when labels on nodes changed </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Wangda Tan </td>
<td align="left"> Wangda Tan </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3092">YARN-3092</a> </td>
<td align="left"> Create common ResourceUsage class to track labeled resource usages in Capacity Scheduler </td>
<td align="left">  Major </td>
<td align="left"> api, client, resourcemanager </td>
<td align="left"> Wangda Tan </td>
<td align="left"> Wangda Tan </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3011">YARN-3011</a> </td>
<td align="left"> NM dies because of the failure of resource localization </td>
<td align="left">  Major </td>
<td align="left"> nodemanager </td>
<td align="left"> Wang Hao </td>
<td align="left"> Varun Saxena </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3099">YARN-3099</a> </td>
<td align="left"> Capacity Scheduler LeafQueue/ParentQueue should use ResourceUsage to track used-resources-by-label. </td>
<td align="left">  Major </td>
<td align="left"> api, client, resourcemanager </td>
<td align="left"> Wangda Tan </td>
<td align="left"> Wangda Tan </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3098">YARN-3098</a> </td>
<td align="left"> Create common QueueCapacities class in Capacity Scheduler to track capacities-by-labels of queues </td>
<td align="left">  Major </td>
<td align="left"> capacityscheduler </td>
<td align="left"> Wangda Tan </td>
<td align="left"> Wangda Tan </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2694">YARN-2694</a> </td>
<td align="left"> Ensure only single node labels specified in resource request / host, and node label expression only specified when resourceName=ANY </td>
<td align="left">  Major </td>
<td align="left"> capacityscheduler, resourcemanager </td>
<td align="left"> Wangda Tan </td>
<td align="left"> Wangda Tan </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3124">YARN-3124</a> </td>
<td align="left"> Capacity Scheduler LeafQueue/ParentQueue should use QueueCapacities to track capacities-by-label </td>
<td align="left">  Major </td>
<td align="left"> api, client, resourcemanager </td>
<td align="left"> Wangda Tan </td>
<td align="left"> Wangda Tan </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-1809">YARN-1809</a> </td>
<td align="left"> Synchronize RM and Generic History Service Web-UIs </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Zhijie Shen </td>
<td align="left"> Xuan Gong </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-1884">YARN-1884</a> </td>
<td align="left"> ContainerReport should have nodeHttpAddress </td>
<td align="left">  Major </td>
<td align="left"> . </td>
<td align="left"> Zhijie Shen </td>
<td align="left"> Xuan Gong </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/HADOOP-11710">HADOOP-11710</a> </td>
<td align="left"> Make CryptoOutputStream behave like DFSOutputStream wrt synchronization </td>
<td align="left">  Critical </td>
<td align="left"> fs </td>
<td align="left"> Sean Busbey </td>
<td align="left"> Sean Busbey </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3171">YARN-3171</a> </td>
<td align="left"> Sort by Application id, AppAttempt &amp; ContainerID doesn&#x2019;t work in ATS / RM web ui </td>
<td align="left">  Minor </td>
<td align="left"> timelineserver </td>
<td align="left"> Jeff Zhang </td>
<td align="left"> Naganarasimha G R </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3487">YARN-3487</a> </td>
<td align="left"> CapacityScheduler scheduler lock obtained unnecessarily when calling getQueue </td>
<td align="left">  Critical </td>
<td align="left"> capacityscheduler </td>
<td align="left"> Jason Lowe </td>
<td align="left"> Jason Lowe </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3544">YARN-3544</a> </td>
<td align="left"> AM logs link missing in the RM UI for a completed app </td>
<td align="left">  Blocker </td>
<td align="left"> . </td>
<td align="left"> Hitesh Shah </td>
<td align="left"> Xuan Gong </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2918">YARN-2918</a> </td>
<td align="left"> Don&#x2019;t fail RM if queue&#x2019;s configured labels are not existed in cluster-node-labels </td>
<td align="left">  Major </td>
<td align="left"> resourcemanager </td>
<td align="left"> Rohith Sharma K S </td>
<td align="left"> Wangda Tan </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3700">YARN-3700</a> </td>
<td align="left"> ATS Web Performance issue at load time when large number of jobs </td>
<td align="left">  Major </td>
<td align="left"> resourcemanager, webapp, yarn </td>
<td align="left"> Xuan Gong </td>
<td align="left"> Xuan Gong </td></tr>
<tr class="b">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-3740">YARN-3740</a> </td>
<td align="left"> Fixed the typo with the configuration name: APPLICATION_HISTORY_PREFIX_MAX_APPS </td>
<td align="left">  Major </td>
<td align="left"> resourcemanager, webapp, yarn </td>
<td align="left"> Xuan Gong </td>
<td align="left"> Xuan Gong </td></tr>
<tr class="a">
<td align="left"> <a class="externalLink" href="https://issues.apache.org/jira/browse/YARN-2900">YARN-2900</a> </td>
<td align="left"> Application (Attempt and Container) Not Found in AHS results in Internal Server Error (500) </td>
<td align="left">  Major </td>
<td align="left"> timelineserver </td>
<td align="left"> Jonathan Eagles </td>
<td align="left"> Mit Desai </td></tr>
</tbody>
</table></section></section>
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