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Posted to yarn-issues@hadoop.apache.org by "Varun Saxena (JIRA)" <ji...@apache.org> on 2015/09/09 14:35:46 UTC

[jira] [Commented] (YARN-4000) RM crashes with NPE if leaf queue becomes parent queue during restart

    [ https://issues.apache.org/jira/browse/YARN-4000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14736768#comment-14736768 ] 

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

I meant in terms starting RM from scratch only. I mean the configuration isnt rejected on start(will be rejected on switchover though). So I thought in this case, we can fail the currently running apps instead of not letting RM start. Anyways fail-fast config seems to be a viable option instead choosing either of the approaches.

> 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
>
> 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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