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https://issues.apache.org/jira/browse/BEAM-7626?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16872399#comment-16872399
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Ismaël Mejía commented on BEAM-7626:
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Aren't other inputs specified as side inputs?
https://github.com/apache/beam/blob/5ee4cf4e4880782492ec26f2b454a6df9b25f1e2/model/pipeline/src/main/proto/beam_runner_api.proto#L1251
> ExecutableStage should be able to accept multiple input PCollection
> --------------------------------------------------------------------
>
> Key: BEAM-7626
> URL: https://issues.apache.org/jira/browse/BEAM-7626
> Project: Beam
> Issue Type: New Feature
> Components: java-fn-execution
> Reporter: Boyuan Zhang
> Priority: Major
>
> Current implementation of ExecutableStage only accepts one input PColletion:
> https://github.com/apache/beam/blob/5ee4cf4e4880782492ec26f2b454a6df9b25f1e2/model/pipeline/src/main/proto/beam_runner_api.proto#L1247.
> But it's possible that a ExecutableStage has multiple inputs.
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