chia7712 commented on code in PR #20534:
URL: https://github.com/apache/kafka/pull/20534#discussion_r2377503654
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storage/src/main/java/org/apache/kafka/storage/internals/log/UnifiedLog.java:
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@@ -1385,10 +1385,19 @@ private AnalyzeAndValidateProducerStateResult
analyzeAndValidateProducerState(Lo
// transaction is completed or aborted. We can guarantee
the transaction coordinator knows about the transaction given step 1 and that
the transaction is still
// ongoing. If the transaction is expected to be ongoing,
we will not set a VerificationGuard. If the transaction is aborted,
hasOngoingTransaction is false and
// requestVerificationGuard is the sentinel, so we will
throw an error. A subsequent produce request (retry) should create verification
state and return to phase 1.
- if (batch.isTransactional()
- && !hasOngoingTransaction(batch.producerId(),
batch.producerEpoch())
- && batchMissingRequiredVerification(batch,
requestVerificationGuard)) {
- throw new InvalidTxnStateException("Record was not
part of an ongoing transaction");
+ if (batch.isTransactional() &&
!hasOngoingTransaction(batch.producerId(), batch.producerEpoch())) {
+ // Check epoch first: if producer epoch is stale,
throw recoverable InvalidProducerEpochException.
+ ProducerStateEntry entry =
producerStateManager.activeProducers().get(batch.producerId());
+ if (entry != null && batch.producerEpoch() <
entry.producerEpoch()) {
Review Comment:
One more question: I don't have the full bug context for Kafka streams, but
should we cover additional cases for invalid batch epoch? for example:
`batch.producerEpoch` > `entry.producerEpoch`
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