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https://issues.apache.org/jira/browse/BEAM-8520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17174610#comment-17174610
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Beam JIRA Bot commented on BEAM-8520:
-------------------------------------
This issue is P2 but has been unassigned without any comment for 60 days so it
has been labeled "stale-P2". If this issue is still affecting you, we care!
Please comment and remove the label. Otherwise, in 14 days the issue will be
moved to P3.
Please see https://beam.apache.org/contribute/jira-priorities/ for a detailed
explanation of what these priorities mean.
> Expansion of _CombinePerKeyWithHotKeyFanout has no typehints
> ------------------------------------------------------------
>
> Key: BEAM-8520
> URL: https://issues.apache.org/jira/browse/BEAM-8520
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Yifan Mai
> Priority: P2
> Labels: stale-P2
>
> The expansion of
> [_CombinePerKeyWithHotKeyFanout|https://github.com/apache/beam/blob/bd09a038f4df896ef6d903a4944083fcd2e8f727/sdks/python/apache_beam/transforms/core.py#L1913],
> which is used by
> [CombinePerKey.with_hot_key_fanout()|https://github.com/apache/beam/blob/bd09a038f4df896ef6d903a4944083fcd2e8f727/sdks/python/apache_beam/transforms/core.py#L1734],
> uses DoFns (SplitHotCold) and CombineFns (PreCombineFn, PostCombineFn) and a
> lambda (SplitNonce) that have no typehints. If the user specified a typehints
> on the original CombineFn, the typehints are lost. This means that the
> fallback coder rather than the user specified coder.
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