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https://issues.apache.org/jira/browse/YARN-4338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14996246#comment-14996246
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Xinwei Qin  commented on YARN-4338:
-----------------------------------

Thanks [~Naganarasimha] for your suggestion, the test case passed with this 
modification.

> NPE in RegularContainerAllocator.preCheckForNewContainer()
> ----------------------------------------------------------
>
>                 Key: YARN-4338
>                 URL: https://issues.apache.org/jira/browse/YARN-4338
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: Xinwei Qin 
>            Priority: Minor
>         Attachments: YARN-4338.001.patch
>
>
> The codes in RegularContainerAllocator.preCheckForNewContainer():
> {code}
>     if (anyRequest.getNodeLabelExpression()
>         .equals(RMNodeLabelsManager.NO_LABEL)) {
>       missedNonPartitionedRequestSchedulingOpportunity =
>           application
>               .addMissedNonPartitionedRequestSchedulingOpportunity(priority);
>     }
> {code}
> {code}anyRequest.getNodeLabelExpression(){code}may return null.



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