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From "Varun Saxena (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4000) RM crashes with NPE if leaf queue becomes parent queue during restart
Date Wed, 16 Sep 2015 06:37:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14746985#comment-14746985
] 

Varun Saxena commented on YARN-4000:
------------------------------------

[~jianhe], moreover there will be subclasses of RMAppEvent which also have their version of
diagnostics.
Maybe we would want to refactor that as well. Do it as part of this JIRA only ?

> 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
>         Attachments: YARN-4000.01.patch, YARN-4000.02.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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