[jira] [Commented] (BEAM-13715) Kafka commit offset drop data on failure for runners that have non-checkpointing shuffle

["Kenneth Knowles (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/BEAM-13715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17480209#comment-17480209 ] 

Kenneth Knowles commented on BEAM-13715:
----------------------------------------

CC [~boyuanz] (author) [~aromanenko] (reviewer) for https://github.com/apache/beam/pull/12572

> Kafka commit offset drop data on failure for runners that have non-checkpointing shuffle
> ----------------------------------------------------------------------------------------
>
>                 Key: BEAM-13715
>                 URL: https://issues.apache.org/jira/browse/BEAM-13715
>             Project: Beam
>          Issue Type: Bug
>          Components: io-java-kafka
>    Affects Versions: 2.26.0, 2.27.0, 2.28.0, 2.29.0, 2.30.0, 2.31.0, 2.32.0, 2.33.0, 2.34.0, 2.35.0, 2.36.0
>            Reporter: Kenneth Knowles
>            Priority: P1
>
> A user noticed that we commit Kafka offsets without any obvious checkpointing. We use a {{Reshuffle.byRandomKey()}} to cause Dataflow and the SparkRunner to checkpoint. But on runners with non-checkpointing shuffle, this risks data loss.
>  
> The modern solution is to use {{{}@RequiresStableInput{}}}. This is not perfectly/fully implemented across many runners, so we still need the explicit shuffle for now.
>  
> https://stackoverflow.com/questions/70785672/apache-beam-kafkaio-commit-offset-behaviour



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