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https://issues.apache.org/jira/browse/YARN-3565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14547411#comment-14547411
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Naganarasimha G R commented on YARN-3565:
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Thanks [~aw], for looking it .

> NodeHeartbeatRequest/RegisterNodeManagerRequest should use NodeLabel object 
> instead of String
> ---------------------------------------------------------------------------------------------
>
>                 Key: YARN-3565
>                 URL: https://issues.apache.org/jira/browse/YARN-3565
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: api, client, resourcemanager
>            Reporter: Wangda Tan
>            Assignee: Naganarasimha G R
>            Priority: Blocker
>         Attachments: YARN-3565-20150502-1.patch, YARN-3565.20150515-1.patch, 
> YARN-3565.20150516-1.patch
>
>
> Now NM HB/Register uses Set<String>, it will be hard to add new fields if we 
> want to support specifying NodeLabel type such as exclusivity/constraints, 
> etc. We need to make sure rolling upgrade works.



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