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From "Jian He (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-4740) container complete msg may lost while AM restart in race condition
Date Tue, 01 Mar 2016 17:04:18 GMT

    [ https://issues.apache.org/jira/browse/YARN-4740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15174027#comment-15174027
] 

Jian He commented on YARN-4740:
-------------------------------

thanks [~sandflee] !
- could you add a check that the completed container is indeed in the returned allocate response
? also check that the completed container is not in the RMAppAttemptImpl#justFinishedContainers.
{code}
    // sleep a while make sure allocate() get complete container,
    // before this msg pass to AM, AM may crash
    Thread.sleep(1000);
    am1.allocate(
        new ArrayList<ResourceRequest>(), new ArrayList<ContainerId>());
{code}
- it's unnecessary to parameterize the test based on whether RMWorkPreservingEnabled or not,
because the test is not doing any RM restart at all.
{code}
    testAMRestartNotLostContainerCompleteMsg(true);
    testAMRestartNotLostContainerCompleteMsg(false);
{code}

> container complete msg may lost while AM restart in race condition
> ------------------------------------------------------------------
>
>                 Key: YARN-4740
>                 URL: https://issues.apache.org/jira/browse/YARN-4740
>             Project: Hadoop YARN
>          Issue Type: Bug
>            Reporter: sandflee
>            Assignee: sandflee
>         Attachments: YARN-4740.01.patch
>
>
> 1, container completed, and the msg is store in RMAppAttempt.justFinishedContainers
> 2,  AM allocate and before allocateResponse came to AM, AM crashed
> 3,  AM restart and couldn't get the container complete msg.



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