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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Created: (MAPREDUCE-825) JobClient completion poll interval of 5s causes slow tests in local mode
Date Tue, 04 Aug 2009 20:54:14 GMT
JobClient completion poll interval of 5s causes slow tests in local mode
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                 Key: MAPREDUCE-825
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-825
             Project: Hadoop Map/Reduce
          Issue Type: Bug
            Reporter: Aaron Kimball
            Assignee: Aaron Kimball
            Priority: Minor


The JobClient.NetworkedJob.waitForCompletion() method polls for job completion every 5 seconds.
When running a set of short tests in pseudo-distributed mode, this is unnecessarily slow and
causes lots of wasted time. When bandwidth is not scarce, setting the poll interval to 100
ms results in a 4x speedup in some tests.  This interval should be parametrized to allow users
to control the interval for testing purposes.


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