[jira] [Created] (YARN-1821) NM throws NPE on re-register with RM if it has containers for Unmanaged AMs

["Karthik Kambatla (JIRA)" <ji...@apache.org>]

Karthik Kambatla created YARN-1821:
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             Summary: NM throws NPE on re-register with RM if it has containers for Unmanaged AMs
                 Key: YARN-1821
                 URL: https://issues.apache.org/jira/browse/YARN-1821
             Project: Hadoop YARN
          Issue Type: Sub-task
            Reporter: Karthik Kambatla
            Priority: Blocker


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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