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Posted to issues@beam.apache.org by "Beam JIRA Bot (Jira)" <ji...@apache.org> on 2021/01/22 17:14:05 UTC

[jira] [Assigned] (BEAM-11267) Remove unnecessary reshuffle for stateful ParDo after keyed operation

     [ https://issues.apache.org/jira/browse/BEAM-11267?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Beam JIRA Bot reassigned BEAM-11267:
------------------------------------

    Assignee:     (was: David Morávek)

> Remove unnecessary reshuffle for stateful ParDo after keyed operation
> ---------------------------------------------------------------------
>
>                 Key: BEAM-11267
>                 URL: https://issues.apache.org/jira/browse/BEAM-11267
>             Project: Beam
>          Issue Type: Improvement
>          Components: runner-flink
>            Reporter: David Morávek
>            Priority: P3
>              Labels: stale-assigned
>          Time Spent: 3h
>  Remaining Estimate: 0h
>
> When we have stateful pardo after GBK / Combine, we can safely assume that partitioning remains consistent and we can safe an extra shuffle.
> The use case for this are user defined timers / datadriven triggers. This code path is stressed for example by org.apache.beam.sdk.transforms.ParDoTest.TimerTests#testGbkFollowedByUserTimers.



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