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https://issues.apache.org/jira/browse/YARN-63?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13449089#comment-13449089
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Robert Joseph Evans commented on YARN-63:
-----------------------------------------

It would also be nice to change it so that when an invalid transition happens 
in the node that more then just an error is logged, but I am not really sure 
what else it should do.  So adding in those transitions are probably not that 
critical.
                
> RMNodeImpl is missing valid transitions from the UNHEALTHY state
> ----------------------------------------------------------------
>
>                 Key: YARN-63
>                 URL: https://issues.apache.org/jira/browse/YARN-63
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>    Affects Versions: 2.1.0-alpha, 0.23.3
>            Reporter: Jason Lowe
>            Assignee: Jason Lowe
>             Fix For: 2.2.0-alpha, 0.23.3
>
>         Attachments: YARN-63-branch-0.23.patch, YARN-63.patch
>
>
> The ResourceManager isn't properly handling nodes that have been marked 
> UNHEALTHY when they are lost or are decommissioned.

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