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https://issues.apache.org/jira/browse/MAPREDUCE-2217?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13961187#comment-13961187
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Karthik Kambatla commented on MAPREDUCE-2217:
---------------------------------------------

[~Grigory Turunov] - we recently ran into this issue as well, and working on a 
fix. Will update this thread once we have it ready. 

> The expire launching task should cover the UNASSIGNED task
> ----------------------------------------------------------
>
>                 Key: MAPREDUCE-2217
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2217
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobtracker
>    Affects Versions: 0.23.0, 1.1.1
>            Reporter: Scott Chen
>            Assignee: Karthik Kambatla
>             Fix For: 1.2.0
>
>         Attachments: MAPREDUCE-2217.1.txt, MR-2217.patch, MR-2217.patch, 
> expose-bug-mr-2217.patch
>
>
> The ExpireLaunchingTask thread kills the task that are scheduled but not 
> responded.
> Currently if a task is scheduled on tasktracker and for some reason 
> tasktracker cannot put it to RUNNING.
> The task will just hang in the UNASSIGNED status and JobTracker will keep 
> waiting for it.
> JobTracker.ExpireLaunchingTask should be able to kill this task.



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