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https://issues.apache.org/jira/browse/YARN-1888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13951591#comment-13951591
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Karthik Kambatla commented on YARN-1888:
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Don't think this is a bug. People should be able to run multiple NMs on a node. 
The port 0 is primarily for convenience. 

> Not add NodeManager to inactiveRMNodes when reboot NodeManager which have 
> different port
> ----------------------------------------------------------------------------------------
>
>                 Key: YARN-1888
>                 URL: https://issues.apache.org/jira/browse/YARN-1888
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.3.0
>            Reporter: zhaoyunjiong
>            Priority: Minor
>         Attachments: YARN-1888.patch
>
>
> When NodeManager's port set to 0, reboot NodeManager will cause "Losts Nodes" 
> inaccurate.



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