Tao Yang updated YARN-7003:
    Attachment: YARN-7003.001.patch

> DRAINING state of queues can't be recovered after RM restart
> ------------------------------------------------------------
>                 Key: YARN-7003
>                 URL: https://issues.apache.org/jira/browse/YARN-7003
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: capacityscheduler
>    Affects Versions: 2.9.0, 3.0.0-alpha4
>            Reporter: Tao Yang
>            Assignee: Tao Yang
>         Attachments: YARN-7003.001.patch
> DRAINING state is a temporary state in RM memory, when queue state is set to 
> be STOPPED but there are still some pending or active apps in it, the queue 
> state will be changed to DRAINING instead of STOPPED after refreshing queues. 
> We've encountered the problem that the state of this queue will aways be 
> STOPPED after RM restarted, so that it can be removed at any time and leave 
> some apps in a non-existing queue.
> To fix this problem, we could recover DRAINING state in the recovery process 
> of pending/active apps. I will upload a patch with test case later for review.

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