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https://issues.apache.org/jira/browse/BEAM-6294?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16743484#comment-16743484
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Thomas Weise commented on BEAM-6294:
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[~robertwb] [~mxm] we found that the non-native reshuffle expansion seems to
have an issue. We saw records being dropped with Flink portable streaming. The
issue went away with the switch to Flink rebalance.
> Use Flink's redistribute for reshuffle.
> ---------------------------------------
>
> Key: BEAM-6294
> URL: https://issues.apache.org/jira/browse/BEAM-6294
> Project: Beam
> Issue Type: New Feature
> Components: runner-flink, sdk-py-core
> Reporter: Robert Bradshaw
> Assignee: Robert Bradshaw
> Priority: Major
> Fix For: 2.10.0
>
> Time Spent: 2h 20m
> Remaining Estimate: 0h
>
> Python needs to publish the URN over the FnAPI which is pretty easy, but
> Flink also needs to ensure that the composite structure does not get fused.
> Unlike with GBK, we can't assume all runners implement this as a primitive.
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