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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-897) CapacityScheduler wrongly sorted queues
Date Fri, 19 Jul 2013 12:34:49 GMT

    [ https://issues.apache.org/jira/browse/YARN-897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13713605#comment-13713605
] 

Arun C Murthy commented on YARN-897:
------------------------------------

Good point, I think it's appropriate to modify completedContainer to include the queue name.
Thanks.
                
> CapacityScheduler wrongly sorted queues
> ---------------------------------------
>
>                 Key: YARN-897
>                 URL: https://issues.apache.org/jira/browse/YARN-897
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 2.0.4-alpha
>            Reporter: Djellel Eddine Difallah
>            Priority: Blocker
>         Attachments: TestBugParentQueue.java, YARN-897-1.patch, YARN-897-2.patch
>
>
> The childQueues of a ParentQueue are stored in a TreeSet where UsedCapacity defines the
sort order. This ensures the queue with least UsedCapacity to receive resources next. On containerAssignment
we correctly update the order, but we miss to do so on container completions. This corrupts
the TreeSet structure, and under-capacity queues might starve for resources.

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