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https://issues.apache.org/jira/browse/BEAM-11882?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kenneth Knowles updated BEAM-11882:
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Status: Open (was: Triage Needed)
> Avoid returning bare lists for iterables in CombineFn.merge_accumulators
> ------------------------------------------------------------------------
>
> Key: BEAM-11882
> URL: https://issues.apache.org/jira/browse/BEAM-11882
> Project: Beam
> Issue Type: New Feature
> Components: sdk-py-core
> Reporter: Robert Bradshaw
> Priority: P2
>
> The only contract here is that what is returned here is an iterable. We
> should avoid returning a more concrete class to better set expectations when
> running on distributed runners.
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