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https://issues.apache.org/jira/browse/YARN-1641?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13900234#comment-13900234
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Hudson commented on YARN-1641:
------------------------------
SUCCESS: Integrated in Hadoop-Yarn-trunk #480 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/480/])
YARN-1641. ZK store should attempt a write periodically to ensure it is still
Active. (kasha) (kasha:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1567628)
* /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/RMStateStore.java
*
/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
*
/hadoop/common/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/test/java/org/apache/hadoop/yarn/server/resourcemanager/recovery/TestZKRMStateStore.java
> ZK store should attempt a write periodically to ensure it is still Active
> -------------------------------------------------------------------------
>
> Key: YARN-1641
> URL: https://issues.apache.org/jira/browse/YARN-1641
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Affects Versions: 2.3.0
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Fix For: 2.4.0
>
> Attachments: yarn-1641-1.patch, yarn-1641-2.patch
>
>
> Fencing in ZK store kicks in when the RM tries to write something to the
> store. If the RM doesn't write anything to the store, it doesn't get fenced
> and can continue to assume being the Active.
> By periodically writing a file (say, every RM_ZK_TIMEOUT_MS seconds), we can
> ensure it gets fenced.
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