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Posted to issues@tez.apache.org by "Bikas Saha (JIRA)" <ji...@apache.org> on 2015/07/27 23:03:05 UTC

[jira] [Created] (TEZ-2647) Add input causality dependency for attempts

Bikas Saha created TEZ-2647:
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             Summary: Add input causality dependency for attempts
                 Key: TEZ-2647
                 URL: https://issues.apache.org/jira/browse/TEZ-2647
             Project: Apache Tez
          Issue Type: Sub-task
            Reporter: Bikas Saha
            Assignee: Bikas Saha


Attempts can have input dependencies on the producer task attempts that produced the data being consumed by the attempt.
DataMovement events capture this dependency. In the interest of space, we need to be able to capture the dependency that matters - the one that provided the last data for the input to complete.
For starters, we could 
1) have the system track the last data movement event that was sent to an attempt
2) then have the inputs be able to report the last relevant data movement event



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