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Posted to issues@tez.apache.org by "Gopal V (JIRA)" <ji...@apache.org> on 2015/07/26 06:02:04 UTC

[jira] [Created] (TEZ-2644) UnorderedKVOutputWriter has unnecessary synchronized blocks

Gopal V created TEZ-2644:
----------------------------

             Summary: UnorderedKVOutputWriter has unnecessary synchronized blocks 
                 Key: TEZ-2644
                 URL: https://issues.apache.org/jira/browse/TEZ-2644
             Project: Apache Tez
          Issue Type: Bug
    Affects Versions: 0.8.0, 0.7.1
            Reporter: Gopal V


Nearly 50% of the CPU samples for Unordered 1-1 edges are either in ByteArrayOutputStream or DataOutputStream synchronization primitives.

!flink-1-1-edge.png!

!dataoutputstream-sync.png!



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