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From "Alejandro Abdelnur (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-1276) TaskTracker expiry interval is not configurable
Date Fri, 20 Apr 2007 05:39:15 GMT
TaskTracker expiry interval is not configurable
-----------------------------------------------

                 Key: HADOOP-1276
                 URL: https://issues.apache.org/jira/browse/HADOOP-1276
             Project: Hadoop
          Issue Type: Improvement
          Components: mapred
         Environment: all
            Reporter: Alejandro Abdelnur
            Priority: Minor
             Fix For: 0.13.0


The tasktracker expiry interval is hardcoded to 10 mins with the MRConstants.TASKTRACKER_EXPIRY_INTERVAL
constant.

For small clusters, running small jobs, this interval is too high.

Making it configurable it would require:

 * Introducing a 'tasktracker.expiry.interval' property with default value of 10 mins.
 * Load the property in the JobTracker
 * Change the 5 usages of the constant by a property in the JobTracker
 * Remove the constant from MRConstants
 * add default value to the hadoop-default.xml file


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