[
https://issues.apache.org/jira/browse/YARN-2721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14179842#comment-14179842
]
Tsuyoshi OZAWA commented on YARN-2721:
--------------------------------------
Good job, Jian. Created YARN-2725 for adding tests to cover these cases.
> 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
>
> Attachments: YARN-2721.1.patch
>
>
> 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.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
