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https://issues.apache.org/jira/browse/YARN-325?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13547673#comment-13547673
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Arun C Murthy commented on YARN-325:
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[~jlowe] This seems limited to a corner case (not that it should be ignore
*smile*) in LeafQueue.assignedReservedContainer.
The issue is that LeafQueue.assignReserved is a synchronized method which calls
completedContainer... need to figure a way around this.
> RM CapacityScheduler can deadlock when getQueueInfo() is called and a
> container is completing
> ---------------------------------------------------------------------------------------------
>
> Key: YARN-325
> URL: https://issues.apache.org/jira/browse/YARN-325
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler
> Affects Versions: 2.0.2-alpha, 0.23.5
> Reporter: Jason Lowe
> Priority: Critical
>
> If a client calls getQueueInfo on a parent queue (e.g.: the root queue) and
> containers are completing then the RM can deadlock. getQueueInfo() locks the
> ParentQueue and then calls the child queues' getQueueInfo() methods in turn.
> However when a container completes, it locks the LeafQueue then calls back
> into the ParentQueue. When the two mix, it's a recipe for deadlock.
> Stacktrace to follow.
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