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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-236) job tracker should refuse connection from a task tracker with a different version number
Date Fri, 19 May 2006 19:18:29 GMT
job tracker should refuse connection from a task tracker with a different version number
----------------------------------------------------------------------------------------

         Key: HADOOP-236
         URL: http://issues.apache.org/jira/browse/HADOOP-236
     Project: Hadoop
        Type: Bug

  Components: mapred  
    Versions: 0.2.1    
    Reporter: Hairong Kuang


After one mapred system upgrade, we noticed that all tasks assigned to one task tracker failed.
It turned out that for some reason the task tracker was not upgraded.

To avoid this, a task tracker should reports its version # when it registers itsself with
a job tracker. If the job tracker receives an inconsistent version #, it should refuse the
connection.

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