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https://issues.apache.org/jira/browse/YARN-2962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14339900#comment-14339900
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Tsuyoshi Ozawa commented on YARN-2962:
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[~varun_saxena], Yes, RMStateStore#checkVersion validates the version. I think 
this change can be a major upgrade of the version.

> ZKRMStateStore: Limit the number of znodes under a znode
> --------------------------------------------------------
>
>                 Key: YARN-2962
>                 URL: https://issues.apache.org/jira/browse/YARN-2962
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.6.0
>            Reporter: Karthik Kambatla
>            Assignee: Varun Saxena
>            Priority: Critical
>
> We ran into this issue where we were hitting the default ZK server message 
> size configs, primarily because the message had too many znodes even though 
> they individually they were all small.



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