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https://issues.apache.org/jira/browse/YARN-1849?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13940640#comment-13940640
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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.
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