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https://issues.apache.org/jira/browse/YARN-1934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13971433#comment-13971433
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Hudson commented on YARN-1934:
------------------------------
SUCCESS: Integrated in Hadoop-Hdfs-trunk #1734 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1734/])
YARN-1934. Fixed a potential NPE in ZKRMStateStore caused by handling
Disconnected event from ZK. Contributed by Karthik Kambatla. (jianhe:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1587776)
* /hadoop/common/trunk/hadoop-yarn-project/CHANGES.txt
*
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/ZKRMStateStore.java
> Potential NPE in ZKRMStateStore caused by handling Disconnected event from ZK.
> ------------------------------------------------------------------------------
>
> Key: YARN-1934
> URL: https://issues.apache.org/jira/browse/YARN-1934
> Project: Hadoop YARN
> Issue Type: Bug
> Components: resourcemanager
> Affects Versions: 2.4.0
> Reporter: Rohith
> Assignee: Karthik Kambatla
> Priority: Blocker
> Fix For: 2.4.1
>
> Attachments: RM.txt, yarn-1934-0.patch
>
>
> For ZK disconnected event , zkClient is set to null. It is very much prone to
> throw NPE.
> {noformat}
> case Disconnected:
> LOG.info("ZKRMStateStore Session disconnected");
> oldZkClient = zkClient;
> zkClient = null;
> break;
> {noformat}
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