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https://issues.apache.org/jira/browse/YARN-7003?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16470564#comment-16470564
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Tao Yang edited comment on YARN-7003 at 5/10/18 3:41 PM:
---------------------------------------------------------

UT failures seem irrelative with this patch. Attached v4 patch to fix 
check-style warning and trigger again.


was (Author: tao yang):
UT failures seems irrelative with this patch. Attached v4 patch to fix 
check-style warning and trigger again.

> 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
>            Priority: Major
>         Attachments: YARN-7003.001.patch, YARN-7003.002.patch, 
> YARN-7003.003.patch, YARN-7003.004.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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