Till Rohrmann created FLINK-12021:
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Summary: Let ResultConjunctFuture return future results in same
order as futures
Key: FLINK-12021
URL: https://issues.apache.org/jira/browse/FLINK-12021
Project: Flink
Issue Type: Improvement
Components: Runtime / Coordination
Affects Versions: 1.7.2, 1.8.0
Reporter: Till Rohrmann
Assignee: Till Rohrmann
Fix For: 1.8.0
The {{ResultConjunctFuture}} should return future results in the same order as
the futures were specified. The advantage would be that we maintain the same
output order as the input order if the input has been specified with a special
ordering.
This should also fix a current performance regression where we don't maintain
the topological ordering when deploying tasks. Due to this, we need to make an
additional result partition lookup which adds additional latency. The problem
has occurred due to FLINK-10431 which changes the interleaving how the slot
futures are completed.
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