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

[Jian He (JIRA)]

    [ 
https://issues.apache.org/jira/browse/YARN-4000?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14746967#comment-14746967
 ] 

Jian He commented on YARN-4000:
-------------------------------

I see,  a few more comments:
- QueueException -> QueueInvalidException
- If appDiagnosticsBeforeKilling already contains the associated diagnostics, 
we do not need this if/else ?
{code}
if (appDiagnosticsBeforeKilling.isEmpty()) {
  
   diags = getAppKilledDiagnostics();

} else {

  diags = appDiagnosticsBeforeKilling;
}
{code}

> 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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