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https://issues.apache.org/jira/browse/YARN-2721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14179067#comment-14179067
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Jian He commented on YARN-2721:
-------------------------------
Curator should handle the retry properly which is addressed in YARN-2716.
As a temporary fix, we can simply ignore the potential NodeExist exception for
now. Creating a patch.
> Race condition: ZKRMStateStore retry logic may throw NodeExist exception
> -------------------------------------------------------------------------
>
> Key: YARN-2721
> URL: https://issues.apache.org/jira/browse/YARN-2721
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Jian He
> Assignee: Jian He
> Fix For: 2.6.0
>
>
> Blindly retrying operations in zookeeper will not work for non-idempotent
> operations (like create znode). The reason is that the client can do a create
> znode, but the response may not be returned because the server can die or
> timeout. In case of retrying the create znode, it will throw a NODE_EXISTS
> exception from the earlier create from the same session.
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