damccorm opened a new issue, #21465:
URL: https://github.com/apache/beam/issues/21465
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
Imported from Jira
[BEAM-13715](https://issues.apache.org/jira/browse/BEAM-13715). Original Jira
may contain additional context.
Reported by: kenn.
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