[jira] [Commented] (YARN-10896) RM fail over is not reporting the nodes DECOMMISSIONED

["Prabhu Joseph (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/YARN-10896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17420718#comment-17420718 ] 

Prabhu Joseph commented on YARN-10896:
--------------------------------------

Thanks [~Sushil-K-S] for the patch. 

{code} assertEquals(2, rm.getRMContext().getInactiveRMNodes().size()); {code}

1. Why it returns 2, there are only one Inactive node present right?

> RM fail over is not reporting the nodes DECOMMISSIONED 
> -------------------------------------------------------
>
>                 Key: YARN-10896
>                 URL: https://issues.apache.org/jira/browse/YARN-10896
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: resourcemanager
>            Reporter: Sushil Ks
>            Assignee: Sushil Ks
>            Priority: Major
>         Attachments: YARN-10896.001.patch
>
>
> Whenever we add the host entries into the exclude file in order to DECOMMISSION the Nodemanager, we would issue the *yarn rmadmin -refreshNodes* command to transition the nodes from RUNNING to DECOMMISSIONED state. However if the fail over to standby resource manager happens and the exclude file has the list of hosts to be disallowed, then these disallowed nodes are never seen through the Cluster Metrics on the new active resource manager. 
> Whatever host entries that are present in the exclude files are being listed in the Cluster Metrics whenever resource manager is restarted, i.e as part of the service init of *NodeListManager* , however during fail over this info is lost. Hence this patch tries to set the  *DECOMMISSIONED* nodes inside the RM Context so that its available through Cluster Metrics whenever we issue the *yarn rmadmin -refreshNodes* command.



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