Pablo Estrada created BEAM-1502:
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Summary: CombinePerKey returns a list of lists when run locally,
but something else when run on Dataflow
Key: BEAM-1502
URL: https://issues.apache.org/jira/browse/BEAM-1502
Project: Beam
Issue Type: Bug
Components: sdk-py
Reporter: Pablo Estrada
Assignee: Ahmet Altay
GroupByKey also has this issue. This has been seen by customers internally and
externally:
http://stackoverflow.com/questions/42276520/dataflow-0-5-5-what-does-object-of-type-unwindowedvalues-has-no-len-mean/42283279#42283279
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