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From "Siddharth Seth (JIRA)" <j...@apache.org>
Subject [jira] [Created] (TEZ-376) Reduce Processor can parallelize I/O/Processor initialization
Date Mon, 19 Aug 2013 18:44:57 GMT
Siddharth Seth created TEZ-376:

             Summary: Reduce Processor can parallelize I/O/Processor initialization
                 Key: TEZ-376
                 URL: https://issues.apache.org/jira/browse/TEZ-376
             Project: Apache Tez
          Issue Type: Bug
            Reporter: Siddharth Seth
            Assignee: Siddharth Seth

Reported by [~gopalv]. Reduce initialization can take a fair amount of time after shuffle
is complete - depending on how expensive the Reduce initialization is.

Quote from Gopal's investigation
1.6 seconds is spent in ReflectionUtils.newInstance() -> ReflectionUtils.setConf() of which
1.2 seconds is Utilities.getMapRedWork().

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