[jira] [Created] (BEAM-109) Combine.PerKey ignores grouping also by windows

[Amit Sela (JIRA)]

Amit Sela created BEAM-109:
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             Summary: Combine.PerKey ignores grouping also by windows
                 Key: BEAM-109
                 URL: https://issues.apache.org/jira/browse/BEAM-109
             Project: Beam
          Issue Type: Bug
          Components: runner-spark
            Reporter: Amit Sela
            Assignee: Amit Sela


It seems that (event) keys are grouped as WindowedValues by their 
value&timestamp, so if the window contains the same key with different 
timestamps they will not be grouped together.  

Implement GroupAlsoByWindow for Combine operations.

 



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