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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