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https://issues.apache.org/jira/browse/YARN-1849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13941283#comment-13941283
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Karthik Kambatla commented on YARN-1849:
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Thanks [~jianhe]. Agree with you partially; in fact, I was thinking of doing
that initially. However, in case we do end up into these NULLs for managed AMs,
not handling them leads to the NM going down. Logging the errors will let us
know that things are wrong, but not take the nodes down.
> 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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