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From "Karthik Kambatla (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (MAPREDUCE-2217) The expire launching task should cover the UNASSIGNED task
Date Wed, 02 Jan 2013 19:56:14 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-2217?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Karthik Kambatla updated MAPREDUCE-2217:
----------------------------------------

    Attachment: expose-bug-mr-2217.patch

Sorry for the delay, just got around to this.

Uploading a patch that exposes the bug on clusters with some hosts with a 1 in their hostname.
Running a sample pi job with 4 nodes with common prefix followed by 01-04, results in the
job hanging at 75% map progress.

                
> 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: Improvement
>          Components: jobtracker
>    Affects Versions: 0.23.0
>            Reporter: Scott Chen
>            Assignee: Karthik Kambatla
>             Fix For: 0.24.0
>
>         Attachments: expose-bug-mr-2217.patch, MAPREDUCE-2217.1.txt, 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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