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From "Wangda Tan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4000) RM crashes with NPE if leaf queue becomes parent queue during restart
Date Mon, 10 Aug 2015 17:29:46 GMT

    [ https://issues.apache.org/jira/browse/YARN-4000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14680408#comment-14680408

Wangda Tan commented on YARN-4000:

+1 to what [~jlowe]'s suggestion, we should kill app (if rm.fail-fast is false) or fail RM
(if rm.fail-fast is true).

This is similar to https://issues.apache.org/jira/browse/YARN-3764, we need to consider LeafQueue's
movement as well. 
Currently RM restart will be succeeded (haven't verified, just my guess) if we move a leaf
queue from one parent to another during restart. We should fail app/rm in the case before
we support removing queues.

> 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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