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https://issues.apache.org/jira/browse/YARN-3964?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14909029#comment-14909029
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Naganarasimha G R commented on YARN-3964:
-----------------------------------------

Hi [~sunilg],
Point2 is debatable, my 2 cents here is, if {{delegated-centralized}} was the 
default i can agree, and if we have a default implementation which serves some 
purpose like {{MemoryRMStateStore}} then fine, if not i am not too convinced to 
create a dummy provider instance when user is explicitly setting  
{{delegated-centralized}}, cc/ [~leftnoteasy] ur thoughts ?

> Support NodeLabelsProvider at Resource Manager side
> ---------------------------------------------------
>
>                 Key: YARN-3964
>                 URL: https://issues.apache.org/jira/browse/YARN-3964
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Dian Fu
>            Assignee: Dian Fu
>         Attachments: YARN-3964 design doc.pdf, YARN-3964.002.patch, 
> YARN-3964.003.patch, YARN-3964.004.patch, YARN-3964.005.patch, 
> YARN-3964.006.patch, YARN-3964.007.patch, YARN-3964.007.patch, 
> YARN-3964.008.patch, YARN-3964.009.patch, YARN-3964.1.patch
>
>
> Currently, CLI/REST API is provided in Resource Manager to allow users to 
> specify labels for nodes. For labels which may change over time, users will 
> have to start a cron job to update the labels. This has the following 
> limitations:
> - The cron job needs to be run in the YARN admin user.
> - This makes it a little complicate to maintain as users will have to make 
> sure this service/daemon is alive.
> Adding a Node Labels Provider in Resource Manager will provide user more 
> flexibility.



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