[ 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)