[jira] [Created] (BEAM-3297) StartBundle/FinishBundle should be called only if there are elements

[Henning Rohde (JIRA)]

Henning Rohde created BEAM-3297:
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             Summary: StartBundle/FinishBundle should be called only if there 
are elements 
                 Key: BEAM-3297
                 URL: https://issues.apache.org/jira/browse/BEAM-3297
             Project: Beam
          Issue Type: Bug
          Components: sdk-go
            Reporter: Henning Rohde
            Assignee: Henning Rohde
            Priority: Minor


I believe the semantics is lazy. Exec currently calls SB/FB eagerly 
irrespectively of whether any elements are emitted.



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