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https://issues.apache.org/jira/browse/YARN-1821?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13930991#comment-13930991
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Jian He commented on YARN-1821:
-------------------------------
Thanks for finding one more UMA issue again ! :) will look at the patch soon
today or tmr.
> NPE on registerNodeManager if the request has containers for UnmanagedAMs
> -------------------------------------------------------------------------
>
> Key: YARN-1821
> URL: https://issues.apache.org/jira/browse/YARN-1821
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: resourcemanager
> Reporter: Karthik Kambatla
> Assignee: Karthik Kambatla
> Priority: Blocker
> Attachments: yarn-1821-1.patch
>
>
> On RM restart (or failover), NM re-registers with the RM. If it was running
> containers for Unmanaged AMs, it runs into the following NPE:
> {noformat}
> Caused by:
> org.apache.hadoop.ipc.RemoteException(java.lang.NullPointerException):
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.resourcemanager.ResourceTrackerService.registerNodeManager(ResourceTrackerService.java:213)
> at
> org.apache.hadoop.yarn.server.api.impl.pb.service.ResourceTrackerPBServiceImpl.registerNodeManager(ResourceTrackerPBServiceImpl.java:54)
> {noformat}
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