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https://issues.apache.org/jira/browse/YARN-2757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhihai xu updated YARN-2757:
----------------------------
    Issue Type: Sub-task  (was: Bug)
        Parent: YARN-2492

> potential NPE in checkNodeLabelExpression of SchedulerUtils for nodeLabels.
> ---------------------------------------------------------------------------
>
>                 Key: YARN-2757
>                 URL: https://issues.apache.org/jira/browse/YARN-2757
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: zhihai xu
>            Assignee: zhihai xu
>            Priority: Minor
>         Attachments: YARN-2757.000.patch
>
>
> pontential NPE in checkNodeLabelExpression of SchedulerUtils for nodeLabels.
> since we check the nodeLabels null at 
> {code}
>         if (!str.trim().isEmpty()
>             && (nodeLabels == null || !nodeLabels.contains(str.trim()))) {
>           return false;
>         }
> {code}
> We should also check nodeLabels null at 
> {code}
>       if (!nodeLabels.isEmpty()) {
>         return false;
>       }
> {code}



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