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https://issues.apache.org/jira/browse/BEAM-4124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16448560#comment-16448560
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Cody Schroeder commented on BEAM-4124:
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Not theoretical; I've actually hit the limit during experimentation. I too
would prefer a more general solution, but increasing the limit in the
short-term would be helpful.
> Support elements larger than 4 MB
> ---------------------------------
>
> Key: BEAM-4124
> URL: https://issues.apache.org/jira/browse/BEAM-4124
> Project: Beam
> Issue Type: Bug
> Components: sdk-go
> Reporter: Cody Schroeder
> Assignee: Bill Neubauer
> Priority: Major
>
> The Go SDK harness is limited by a gRPC message size limit of 4 MB.
> https://github.com/apache/beam/blob/4a32353/sdks/go/pkg/beam/core/runtime/harness/datamgr.go#L31
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