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https://issues.apache.org/jira/browse/BEAM-4781?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Maximilian Michels closed BEAM-4781.
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Fix Version/s: Not applicable
Resolution: Not A Problem
Tried out the above and do not see an error like in the description.
> PTransforms that simply return their input cause portable Flink to crash.
> -------------------------------------------------------------------------
>
> Key: BEAM-4781
> URL: https://issues.apache.org/jira/browse/BEAM-4781
> Project: Beam
> Issue Type: Task
> Components: sdk-py-core
> Reporter: Robert Bradshaw
> Priority: P2
> Labels: stale-P2
> Fix For: Not applicable
>
>
> E.g.
>
> {code:python}
> class MaybePrint(beam.PTransform):
> def expand(self, pcoll):
> if some_flag:
> pcoll | beam.Map(logging.info)
> return pcoll
> {code}
>
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