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From "Thomas Groh (JIRA)" <j...@apache.org>
Subject [jira] [Created] (BEAM-2569) Be more precise in what is required to write a valid CombineFn
Date Fri, 07 Jul 2017 15:41:00 GMT
Thomas Groh created BEAM-2569:
---------------------------------

             Summary: Be more precise in what is required to write a valid CombineFn
                 Key: BEAM-2569
                 URL: https://issues.apache.org/jira/browse/BEAM-2569
             Project: Beam
          Issue Type: Bug
          Components: beam-model, sdk-java-core, sdk-py
            Reporter: Thomas Groh


We should be explicit in requiring merging of accumulators to be associative and commutative,
and the ability to include empty accumulators.



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