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From "Owen O'Malley (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-99) task trackers can only be assigned one task every heartbeat
Date Thu, 23 Mar 2006 08:32:00 GMT
task trackers can only be assigned one task every heartbeat
-----------------------------------------------------------

         Key: HADOOP-99
         URL: http://issues.apache.org/jira/browse/HADOOP-99
     Project: Hadoop
        Type: Bug
  Components: mapred  
    Versions: 0.1    
    Reporter: Owen O'Malley


Task trackers only call pollForNewTask once per a heartbeat (10 seconds) rather than when
a task finishes. Especially for quick maps this means that the cluster is under utilized,
because each map finishes in a cycle and the task tracker never gets a second, third or fourth
task to run.

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