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https://issues.apache.org/jira/browse/BEAM-3450?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16321299#comment-16321299
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ASF GitHub Bot commented on BEAM-3450:
--------------------------------------

tgroh opened a new pull request #4386: [BEAM-3450] Add wire_coder_id to 
RemoteGrpcPort
URL: https://github.com/apache/beam/pull/4386
 
 
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   ---
   This is the first step to decouple the wire-format coders from intermediate 
PCollection coders
   
   Fallback to the coder of the output PCollection if this field is not 
populated.

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> RemoteGrpcPorts should contain the wire format
> ----------------------------------------------
>
>                 Key: BEAM-3450
>                 URL: https://issues.apache.org/jira/browse/BEAM-3450
>             Project: Beam
>          Issue Type: Bug
>          Components: beam-model, runner-core
>            Reporter: Thomas Groh
>            Assignee: Thomas Groh
>
> This forces the runner to include the wire format independently from a 
> PCollection coder, which should be the coder of the type of the PCollection 
> (e.g. in Java, PCollection<T> has Coder<T> instead of 
> Coder<WindowedValue<T>>, but the runner must use Coder<WindowedValue<T>> over 
> edges).



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