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https://issues.apache.org/jira/browse/TEZ-2548?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14581477#comment-14581477
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Jeff Zhang commented on TEZ-2548:
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Link with TEZ-2550, this seems AM hang issue
> TezClient submitDAG can hang if the AM is in the process of shutting down
> -------------------------------------------------------------------------
>
> Key: TEZ-2548
> URL: https://issues.apache.org/jira/browse/TEZ-2548
> Project: Apache Tez
> Issue Type: Bug
> Reporter: Hitesh Shah
> Assignee: Hitesh Shah
> Attachments: TEZ-2548.1.patch, TEZ-2548.2.patch
>
>
> submitDAG and serviceStop are both synchronized causing submitDAG to be
> locked out during the shutdown process.
> Seen by [~gopalv]
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