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From "jian he (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-5086) MR app master deletes staging dir when sent a reboot command from the RM
Date Wed, 20 Mar 2013 21:07:17 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-5086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13608211#comment-13608211
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jian he commented on MAPREDUCE-5086:
------------------------------------

Is this required in all the tests?
{code}
+     jobid.setAppId(appId);
+     ContainerAllocator mockAlloc = mock(ContainerAllocator.class);
{code}
jobid.setAppId(appId); 
Agree this is not needed, it originally exists in other tests, no idea why.
ContainerAllocator mockAlloc = mock(ContainerAllocator.class);
This is needed because  "super.notifyIsLastAMRetry" will need containerAllocator
                
> MR app master deletes staging dir when sent a reboot command from the RM
> ------------------------------------------------------------------------
>
>                 Key: MAPREDUCE-5086
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5086
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>            Reporter: jian he
>            Assignee: jian he
>         Attachments: YARN-472.1.patch, YARN-472.2.patch
>
>
> If the RM is restarted when the MR job is running, then it sends a reboot command to
the job. The job ends up deleting the staging dir and that causes the next attempt to fail.

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