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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4832) NM side resource value should get updated if change applied in RM side
Date Tue, 10 May 2016 20:21:12 GMT

    [ https://issues.apache.org/jira/browse/YARN-4832?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15278796#comment-15278796
] 

Jian He commented on YARN-4832:
-------------------------------

Thanks Junping for working on the patch, some comments:
I'm thinking of a simpler implementation is to let RM keep on sending the resource to NM,
thus avoiding the new timeout logic in ResourceTrackerService. The extra data sent is only
the Resource object, which should be fairly small. 
NM can react on updating it's resource if current resource does not equal to the resource
sent from RM. 
Also, I think we only need to add additional resource field in NM heartbeatResource. Adding
the same field in NM RegistrationResponse does not make much difference, but that we have
a new field to maintain. 

> NM side resource value should get updated if change applied in RM side
> ----------------------------------------------------------------------
>
>                 Key: YARN-4832
>                 URL: https://issues.apache.org/jira/browse/YARN-4832
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, resourcemanager
>            Reporter: Junping Du
>            Assignee: Junping Du
>            Priority: Critical
>         Attachments: YARN-4832-demo.patch, YARN-4832.patch
>
>
> Now, if we execute CLI to update node (single or multiple) resource in RM side, NM will
not receive any notification. It doesn't affect resource scheduling but will make resource
usage metrics reported by NM a bit weird. We should sync up new resource between RM and NM.



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