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Karthik Kambatla commented on YARN-1849: ---------------------------------------- This time around, it turns out the master container is null: {code} if (rmAppAttempt != null) { if (rmAppAttempt.getMasterContainer().getId() .equals(containerStatus.getContainerId()) && containerStatus.getState() == ContainerState.COMPLETE) {code} Looks like it is not necessary for an UnmanagedAM to have a master container. > 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 > > While running an UnmanagedAM on secure cluster, ran into an NPE on > failover/restart. This is similar to YARN-1821. -- This message was sent by Atlassian JIRA (v6.2#6252)