kirktrue commented on code in PR #17022:
URL: https://github.com/apache/kafka/pull/17022#discussion_r2122305073
##########
clients/src/main/java/org/apache/kafka/clients/producer/internals/TransactionManager.java:
##########
@@ -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:
So if _either_ the producer ID _or_ the epoch of the batch is different than
that of the transaction manager, it's "stale?"
```suggestion
boolean isStaleBatch = batch.producerId() !=
producerIdAndEpoch.producerId || batch.producerEpoch() !=
producerIdAndEpoch.epoch;
```
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