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From "Hemanth Yamijala (JIRA)" <j...@apache.org>
Subject [jira] Commented: (MAPREDUCE-1316) JobTracker holds stale references to retired jobs via unreported tasks
Date Mon, 18 Jan 2010 14:57:54 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-1316?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12801799#action_12801799
] 

Hemanth Yamijala commented on MAPREDUCE-1316:
---------------------------------------------

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

Amar, can you please check this out ?

> 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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