Hadoop QA commented on YARN-2753:

{color:red}-1 overall{color}.  Here are the results of testing the latest 
  against trunk revision 971e91c.

    {color:red}-1 patch{color}.  The patch command could not apply the patch.

Console output: https://builds.apache.org/job/PreCommit-YARN-Build/5599//console

This message is automatically generated.

> potential NPE in checkRemoveLabelsFromNode of CommonNodeLabelsManager
> ---------------------------------------------------------------------
>                 Key: YARN-2753
>                 URL: https://issues.apache.org/jira/browse/YARN-2753
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>         Attachments: YARN-2753.000.patch, YARN-2753.001.patch, 
> YARN-2753.002.patch, YARN-2753.003.patch
> potential NPE(NullPointerException) in checkRemoveLabelsFromNode of 
> CommonNodeLabelsManager.
> It because when a Node is created, Node.labels can be null.
> In this case, nm.labels; may be null.
> So we need check originalLabels not null before use 
> it(originalLabels.containsAll).

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