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https://issues.apache.org/jira/browse/YARN-2753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wangda Tan updated YARN-2753:
-----------------------------
    Summary: Fix potential issues and code clean up for *NodeLabelsManager  
(was: Shouldn't change the value in labelCollections if the key already exists 
and potential NPE at CommonNodeLabelsManager.)

> Fix potential issues and code clean up for *NodeLabelsManager
> -------------------------------------------------------------
>
>                 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
>
>
> CommonNodeLabelsManager#addToCluserNodeLabels should not change the value in 
> labelCollections if the key already exists otherwise the Label.resource will 
> be changed(reset).
> potential NPE(NullPointerException) in checkRemoveLabelsFromNode of 
> CommonNodeLabelsManager.
> 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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