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

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

Kenneth Knowles created BEAM-13715:
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             Summary: 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: 2.35.0, 2.34.0, 2.33.0, 2.32.0, 2.31.0, 2.30.0, 2.29.0, 2.28.0, 2.27.0, 2.26.0, 2.36.0
            Reporter: Kenneth Knowles


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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