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https://issues.apache.org/jira/browse/BEAM-3707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16443005#comment-16443005
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Daniel Oliveira commented on BEAM-3707:
---------------------------------------
This was done together with another Jira issue in [PR
#4924|https://github.com/apache/beam/pull/4924].
> Implement portable non-lifted Combines in Java SDK
> --------------------------------------------------
>
> Key: BEAM-3707
> URL: https://issues.apache.org/jira/browse/BEAM-3707
> Project: Beam
> Issue Type: Sub-task
> Components: sdk-java-core
> Reporter: Daniel Oliveira
> Assignee: Daniel Oliveira
> Priority: Major
> Labels: features, portability
> Fix For: 2.5.0
>
>
> Get a portable version of non-lifted Combines working in Java.
> Non-lifted combines should be done as an opaque ParDo after a GBK within a
> Combine composite transform.
> This task also requires implementing the anonymous case, where the ParDo and
> GBK are not in a composite and the runner cannot identify the ParDo as a
> Combine at all. For now this case only occurs when the Combine has side
> inputs.
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