jolshan commented on code in PR #17022:
URL: https://github.com/apache/kafka/pull/17022#discussion_r2112903427
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clients/src/main/java/org/apache/kafka/clients/producer/internals/TransactionManager.java:
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@@ -779,14 +779,25 @@ public synchronized void
maybeTransitionToErrorState(RuntimeException exception)
}
synchronized void handleFailedBatch(ProducerBatch batch, RuntimeException
exception, boolean adjustSequenceNumbers) {
- maybeTransitionToErrorState(exception);
+ // Compare the batch with the current ProducerIdAndEpoch. If the
producer IDs are the *same* but the epochs
+ // are *different*, consider the batch as stale.
+ boolean isStaleBatch = batch.producerId() ==
producerIdAndEpoch.producerId && batch.producerEpoch() !=
producerIdAndEpoch.epoch;
Review Comment:
one minor thing here, if we have an epoch overflow, we won't consider this
check. Maybe if the producer ID doesn't match, we also ignore it? Not sure if
that has unintended consequences. We could also tackle as a followup, since
without this fix, it's the same state as today.
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