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https://issues.apache.org/jira/browse/YARN-4000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14971124#comment-14971124
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Varun Saxena commented on YARN-4000:
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Thanks [~jianhe] for the commit and review.
Thanks [~leftnoteasy], [~kasha] and [~jlowe] for the review.
> RM crashes with NPE if leaf queue becomes parent queue during restart
> ---------------------------------------------------------------------
>
> Key: YARN-4000
> URL: https://issues.apache.org/jira/browse/YARN-4000
> Project: Hadoop YARN
> Issue Type: Bug
> Components: capacityscheduler, resourcemanager
> Affects Versions: 2.6.0
> Reporter: Jason Lowe
> Assignee: Varun Saxena
> Fix For: 2.8.0, 2.7.2
>
> Attachments: YARN-4000-branch-2.7.01.patch, YARN-4000.01.patch,
> YARN-4000.02.patch, YARN-4000.03.patch, YARN-4000.04.patch,
> YARN-4000.05.patch, YARN-4000.06.patch
>
>
> This is a similar situation to YARN-2308. If an application is active in
> queue A and then the RM restarts with a changed capacity scheduler
> configuration where queue A becomes a parent queue to other subqueues then
> the RM will crash with a NullPointerException.
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