kirktrue commented on code in PR #17022:
URL: https://github.com/apache/kafka/pull/17022#discussion_r2116240713
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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:
I think I'm missing something conceptually—when an epoch overflows, does it
restart at 0, roll over to negative, or something else?
In the case of an overflow, wouldn't the batch's producer epoch value still
differ from the `producerIdAndEpoch`’s value?
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