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https://issues.apache.org/jira/browse/YARN-9075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16719695#comment-16719695
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Billie Rinaldi commented on YARN-9075:
--------------------------------------

[~leftnoteasy], regarding stopping the services twice, the code you referenced 
is a second pass to stop any existing services that did not appear in the 
manifest, which allows the user to remove auxiliary services. I am working on a 
patch addressing your other suggestions. Thanks again!

> Dynamically add or remove auxiliary services
> --------------------------------------------
>
>                 Key: YARN-9075
>                 URL: https://issues.apache.org/jira/browse/YARN-9075
>             Project: Hadoop YARN
>          Issue Type: Improvement
>          Components: nodemanager
>            Reporter: Billie Rinaldi
>            Assignee: Billie Rinaldi
>            Priority: Major
>         Attachments: YARN-9075.001.patch, YARN-9075.002.patch, 
> YARN-9075.003.patch, YARN-9075_Dynamic_Aux_Services_V1.pdf
>
>
> It would be useful to support adding, removing, or updating auxiliary 
> services without requiring a restart of NMs.



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