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From "Hadoop QA (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1316) JobTracker holds stale references to retired jobs via unreported tasks
Date Mon, 18 Jan 2010 14:53:54 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12801797#action_12801797

Hadoop QA commented on MAPREDUCE-1316:

-1 overall.  Here are the results of testing the latest attachment 
  against trunk revision 900159.

    +1 @author.  The patch does not contain any @author tags.

    +1 tests included.  The patch appears to include 12 new or modified tests.

    -1 javadoc.  The javadoc tool appears to have generated 1 warning messages.

    +1 javac.  The applied patch does not increase the total number of javac compiler warnings.

    -1 findbugs.  The patch appears to introduce 4 new Findbugs warnings.

    +1 release audit.  The applied patch does not increase the total number of release audit

    +1 core tests.  The patch passed core unit tests.

    +1 contrib tests.  The patch passed contrib unit tests.

Test results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/393/testReport/
Findbugs warnings: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/393/artifact/trunk/build/test/findbugs/newPatchFindbugsWarnings.html
Checkstyle results: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/393/artifact/trunk/build/test/checkstyle-errors.html
Console output: http://hudson.zones.apache.org/hudson/job/Mapreduce-Patch-h6.grid.sp2.yahoo.net/393/console

This message is automatically generated.

> JobTracker holds stale references to retired jobs via unreported tasks 
> -----------------------------------------------------------------------
>                 Key: MAPREDUCE-1316
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1316
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>            Reporter: Amar Kamat
>            Assignee: Amar Kamat
>            Priority: Blocker
>         Attachments: mapreduce-1316-v1.11.patch, mapreduce-1316-v1.13-branch20-yahoo.patch,
mapreduce-1316-v1.14-branch20-yahoo.patch, mapreduce-1316-v1.14.1-branch20-yahoo.patch, mapreduce-1316-v1.15-branch20-yahoo.patch,
mapreduce-1316-v1.15.patch, mapreduce-1316-v1.7.patch
> JobTracker fails to remove _unreported_ tasks' mapping from _taskToTIPMap_ if the job
finishes and retires. _Unreported tasks_ refers to tasks that were scheduled but the tasktracker
did not report back with the task status. In such cases a stale reference is held to TaskInProgress
(and thus JobInProgress) long after the job is gone leading to memory leak.

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