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From "Vinod K V (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-1685) Debug statements affecting performance of JobTracker.heartbeat
Date Thu, 08 Apr 2010 08:43:36 GMT
Debug statements affecting performance of JobTracker.heartbeat
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                 Key: MAPREDUCE-1685
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-1685
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Vinod K V


Several debug statements that come in the critical section in JobTracker.heartbeat() are not
protected by a LOG.isDebugEnabled() and so incur non-trivial costs, in the order of 15% of
the total heartbeat processing time.

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