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https://issues.apache.org/jira/browse/YARN-1721?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13899729#comment-13899729
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Sandy Ryza commented on YARN-1721:
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To avoid deadlocks, we'll need to make sure that if we lock queues in move, we
lock them before the apps they run in.
> When moving app between queues in Fair Scheduler, grab lock on FSSchedulerApp
> -----------------------------------------------------------------------------
>
> Key: YARN-1721
> URL: https://issues.apache.org/jira/browse/YARN-1721
> Project: Hadoop YARN
> Issue Type: Bug
> Components: scheduler
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
>
> FairScheduler.moveApplication should grab lock on FSSchedulerApp, so that
> allocate() can't be modifying it at the same time.
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