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https://issues.apache.org/jira/browse/BEAM-9624?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17174501#comment-17174501
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Beam JIRA Bot commented on BEAM-9624:
-------------------------------------
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.
> Combine operation should support only converting to accumulators
> ----------------------------------------------------------------
>
> Key: BEAM-9624
> URL: https://issues.apache.org/jira/browse/BEAM-9624
> Project: Beam
> Issue Type: Improvement
> Components: runner-core
> Reporter: Andrew Crites
> Priority: P2
> Labels: stale-P2
> Time Spent: 2h 40m
> Remaining Estimate: 0h
>
> For streaming pipelines, we want to be able to lift the combiner into the
> MergeBuckets without having to also do a PartialGroupByKey before the
> shuffle. We don't want to do the PGBK since it could cause non-deterministic
> results when used with some triggers.
> We propose adding a new URN for doing just the convert to accumulators step
> and adding support for it in Java/Python/Go.
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