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https://issues.apache.org/jira/browse/YARN-4855?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15506856#comment-15506856
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Naganarasimha G R commented on YARN-4855:
-----------------------------------------

Thanks [~Tao Jie],
agree if you want to update all it would be considerable effort but what about 
only for this command ? 
Why i am insisting once we provide a *"--fail-on-unknown-nodes"* then modifying 
to *"-fail-on-unknown-nodes"* will be compatability break and if new jira is 
only for this command then also it would not make sense. 
thoughts from others ? cc/ [~sunilg] & [~wangda]

> Should check if node exists when replace nodelabels
> ---------------------------------------------------
>
>                 Key: YARN-4855
>                 URL: https://issues.apache.org/jira/browse/YARN-4855
>             Project: Hadoop YARN
>          Issue Type: Improvement
>    Affects Versions: 2.6.0
>            Reporter: Tao Jie
>            Assignee: Tao Jie
>            Priority: Minor
>         Attachments: YARN-4855.001.patch, YARN-4855.002.patch, 
> YARN-4855.003.patch, YARN-4855.004.patch, YARN-4855.005.patch, 
> YARN-4855.006.patch, YARN-4855.007.patch, YARN-4855.008.patch, 
> YARN-4855.009.patch, YARN-4855.010.patch, YARN-4855.011.patch, 
> YARN-4855.012.patch
>
>
> Today when we add nodelabels to nodes, it would succeed even if nodes are not 
> existing NodeManger in cluster without any message.
> It could be like this:
> When we use *yarn rmadmin -replaceLabelsOnNode --fail-on-unkown-nodes 
> "node1=label1"* , it would be denied if node is unknown.



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