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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-182) lost task trackers should not update status of completed jobs
Date Mon, 01 May 2006 18:48:46 GMT
lost task trackers should not update status of completed jobs
-------------------------------------------------------------

         Key: HADOOP-182
         URL: http://issues.apache.org/jira/browse/HADOOP-182
     Project: Hadoop
        Type: Bug

  Components: mapred  
    Versions: 0.1.1    
    Reporter: Owen O'Malley
 Assigned to: Owen O'Malley 
    Priority: Minor


When a Task Tracker is lost (by not sending a heartbeat for 10 minutes), the JobTracker marks
the tasks that were active on that node as failed. There are two issues:
   1. No task from a completed or failed job should be modified.
   2. No reduces should be marked as failed, since their output is in dfs and therefore not
only on the dead node.

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