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https://issues-test.apache.org/jira/browse/YARN-5536?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16090127#comment-16090127
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Junping Du commented on YARN-5536:
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Hi [~mingma], I am more conservative on removing previous format support given 
original format (without timeout) has been used for years for cluster 
management (configuration compatibility should be treated as API). If we all 
agree JSON format is the right direction we are heading to, the next step 
should be deprecate it in next major release (3.x), and then totally drop it 
since Hadoop 4.x. Make sense?

> Multiple format support (JSON, etc.) for exclude node file in NM graceful 
> decommission with timeout
> ---------------------------------------------------------------------------------------------------
>
>                 Key: YARN-5536
>                 URL: https://issues-test.apache.org/jira/browse/YARN-5536
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: graceful
>            Reporter: Junping Du
>
> 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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