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https://issues.apache.org/jira/browse/YARN-4348?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15046944#comment-15046944
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Tsuyoshi Ozawa commented on YARN-4348:
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Ran tests locally and pass tests on branch-2.6. Committing this to branch-2.6.

> ZKRMStateStore.syncInternal shouldn't wait for sync completion for avoiding 
> blocking ZK's event thread
> ------------------------------------------------------------------------------------------------------
>
>                 Key: YARN-4348
>                 URL: https://issues.apache.org/jira/browse/YARN-4348
>             Project: Hadoop YARN
>          Issue Type: Bug
>    Affects Versions: 2.7.2, 2.6.2
>            Reporter: Tsuyoshi Ozawa
>            Assignee: Tsuyoshi Ozawa
>            Priority: Blocker
>             Fix For: 2.6.3, 2.7.3
>
>         Attachments: YARN-4348-branch-2.7.002.patch, 
> YARN-4348-branch-2.7.003.patch, YARN-4348-branch-2.7.004.patch, 
> YARN-4348.001.patch, YARN-4348.001.patch, log.txt
>
>
> Jian mentioned that the current internal ZK configuration of ZKRMStateStore 
> can cause a following situation:
> 1. syncInternal timeouts, 
> 2. but sync succeeded later on.
> We should use zkResyncWaitTime as the timeout value.



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