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https://issues.apache.org/jira/browse/YARN-5536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16146459#comment-16146459
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Robert Kanter commented on YARN-5536:
-------------------------------------

Sounds like we won't have time to implement the "full version".  In that case, 
I think we should do the 2nd faster option (remove the XML format) - it will be 
safer from a compatibility perspective if we don't have to worry about the XML 
formatting.  The downside (being unable to specify an individual timeout per 
host) sounds like an uncommon use case.  [~djp], what do you think?

> Multiple format support (JSON, etc.) for exclude node file in NM graceful 
> decommission with timeout
> ---------------------------------------------------------------------------------------------------
>
>                 Key: YARN-5536
>                 URL: https://issues.apache.org/jira/browse/YARN-5536
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: graceful
>            Reporter: Junping Du
>            Priority: Blocker
>
> Per discussion in YARN-4676, we agree that multiple format (other than xml) 
> should be supported to decommission nodes with timeout values.



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