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Posted to commits@beam.apache.org by "Sam Whittle (JIRA)" <ji...@apache.org> on 2018/06/09 00:12:00 UTC

[jira] [Created] (BEAM-4525) Allow combiner lifting with AfterProcessingTime trigger in Dataflow Runner

Sam Whittle created BEAM-4525:
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             Summary: Allow combiner lifting with AfterProcessingTime trigger in Dataflow Runner
                 Key: BEAM-4525
                 URL: https://issues.apache.org/jira/browse/BEAM-4525
             Project: Beam
          Issue Type: Bug
          Components: runner-dataflow
            Reporter: Sam Whittle
            Assignee: Sam Whittle


This seems safe with AfterProcessingTime since otherwise assigning to panes is based upon system timing.  A valid output without combiner lifting would be for all the elements to arrive in a single batch with the same timestamp so allowing combiner lifting seems equivalent and more efficient.



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