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Posted to issues@tez.apache.org by "Siddharth Seth (JIRA)" <ji...@apache.org> on 2013/08/19 20:44:57 UTC

[jira] [Created] (TEZ-376) Reduce Processor can parallelize I/O/Processor initialization

Siddharth Seth created TEZ-376:
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             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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