[jira] [Commented] (YARN-4528) decreaseContainer Message maybe lost if NM restart

[MENG DING (JIRA)]

    [ 
https://issues.apache.org/jira/browse/YARN-4528?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15081267#comment-15081267
 ] 

MENG DING commented on YARN-4528:
---------------------------------

Hi, [~sandflee]

I am not quite sure about the benefit of directly decreasing resource in NM 
(point #2 in your comment). The targetResource is already being persisted in NM 
state store for NM recovery, and RM does not need to check the status of the NM 
decrease anyway. 
{code}
        // Persist container resource change for recovery
        this.context.getNMStateStore().storeContainerResourceChanged(
            containerId, targetResource);
{code}


> decreaseContainer Message maybe lost if NM restart
> --------------------------------------------------
>
>                 Key: YARN-4528
>                 URL: https://issues.apache.org/jira/browse/YARN-4528
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: sandflee
>         Attachments: YARN-4528.01.patch
>
>
> we may pending the container decrease msg util next heartbeat. or checks the 
> resource with rmContainer when node register.



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