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From "Ramkumar Vadali (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-2214) TaskTracker should release slot if task is not launched
Date Wed, 08 Dec 2010 20:49:00 GMT
TaskTracker should release slot if task is not launched
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                 Key: MAPREDUCE-2214
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-2214
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 0.20.1
            Reporter: Ramkumar Vadali
            Assignee: Ramkumar Vadali


TaskTracker.TaskInProgress.launchTask() does not launch a task if it is not in an expected
state. However, in the case where the task is not launched, the slot is not released. We have
observed this in production - the task was in SUCCEEDED state by the time launchTask() got
to it and then the slot was never released. It is not clear how the task got into that state,
but it is better to handle the case.

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