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From "Haibo Chen (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-8992) Fair scheduler can delete a dynamic queue while an application attempt is being added to the queue
Date Fri, 09 Nov 2018 00:02:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-8992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16680630#comment-16680630
] 

Haibo Chen commented on YARN-8992:
----------------------------------

See [^YARN-8990.002.patch] for the proposed fix included in the patch.

> Fair scheduler can delete a dynamic queue while an application attempt is being added
to the queue
> --------------------------------------------------------------------------------------------------
>
>                 Key: YARN-8992
>                 URL: https://issues.apache.org/jira/browse/YARN-8992
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: fairscheduler
>    Affects Versions: 3.1.1
>            Reporter: Haibo Chen
>            Priority: Major
>
> As discovered in YARN-8990, QueueManager can see a leaf queue being empty while FSLeafQueue.addApp()
is called in the middle of      
> {code:java}
> return queue.getNumRunnableApps() == 0 &&
>           leafQueue.getNumNonRunnableApps() == 0 &&
>           leafQueue.getNumAssignedApps() == 0;{code}



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