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https://issues.apache.org/jira/browse/YARN-8990?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16680481#comment-16680481
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Haibo Chen commented on YARN-8990:
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Thanks [~wilfreds] for the patch! I have taken the liberty to update the patch
to fix another race condition (though much more rare): 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}
> FS: race condition in app submit and queue cleanup
> --------------------------------------------------
>
> Key: YARN-8990
> URL: https://issues.apache.org/jira/browse/YARN-8990
> Project: Hadoop YARN
> Issue Type: Bug
> Components: fairscheduler
> Affects Versions: 3.2.0
> Reporter: Wilfred Spiegelenburg
> Assignee: Wilfred Spiegelenburg
> Priority: Blocker
> Attachments: YARN-8990.001.patch
>
>
> With the introduction of the dynamic queue deletion in YARN-8191 a race
> condition was introduced that can cause a queue to be removed while an
> application submit is in progress.
> The issue occurs in {{FairScheduler.addApplication()}} when an application is
> submitted to a dynamic queue which is empty or the queue does not exist yet.
> If during the processing of the application submit the
> {{AllocationFileLoaderService}} kicks of for an update the queue clean up
> will be run first. The application submit first creates the queue and get a
> reference back to the queue.
> Other checks are performed and as the last action before getting ready to
> generate an AppAttempt the queue is updated to show the submitted application
> ID..
> The time between the queue creation and the queue update to show the submit
> is long enough for the queue to be removed. The application however is lost
> and will never get any resources assigned.
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