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https://issues.apache.org/jira/browse/YARN-1849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13941037#comment-13941037
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Jian He commented on YARN-1849:
-------------------------------

Hi, I want to take a look at the patch, can you wait for some time ?  I'll do 
it today.

> NPE in ResourceTrackerService#registerNodeManager for UAM on secure clusters
> ----------------------------------------------------------------------------
>
>                 Key: YARN-1849
>                 URL: https://issues.apache.org/jira/browse/YARN-1849
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.4.0
>            Reporter: Karthik Kambatla
>            Assignee: Karthik Kambatla
>            Priority: Blocker
>         Attachments: yarn-1849-1.patch, yarn-1849-2.patch, yarn-1849-2.patch, 
> yarn-1849-3.patch
>
>
> While running an UnmanagedAM on secure cluster, ran into an NPE on 
> failover/restart. This is similar to YARN-1821. 



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