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https://issues.apache.org/jira/browse/YARN-2136?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14085826#comment-14085826
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Varun Saxena commented on YARN-2136:
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Yes, no more store operations can be performed once RM switches to standby. But 
there might be some threads processing store/update once that is going on. I 
thought JIRA was to handle that case.

> RMStateStore can explicitly handle store/update events when fenced
> ------------------------------------------------------------------
>
>                 Key: YARN-2136
>                 URL: https://issues.apache.org/jira/browse/YARN-2136
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Jian He
>
> RMStateStore can choose to handle/ignore store/update events upfront instead 
> of invoking more ZK operations if state store is at fenced state. 



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