jolshan commented on code in PR #19910:
URL: https://github.com/apache/kafka/pull/19910#discussion_r2136822173
##########
core/src/main/scala/kafka/coordinator/transaction/TransactionCoordinator.scala:
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@@ -819,11 +819,14 @@ class TransactionCoordinator(txnConfig: TransactionConfig,
}
if (nextState == TransactionState.PREPARE_ABORT && isEpochFence)
{
- // We should clear the pending state to make way for the
transition to PrepareAbort and also bump
- // the epoch in the transaction metadata we are about to
append.
+ // We should clear the pending state to make way for the
transition to PrepareAbort
txnMetadata.pendingState = None
- txnMetadata.producerEpoch = producerEpoch
- txnMetadata.lastProducerEpoch = RecordBatch.NO_PRODUCER_EPOCH
+ if (!clientTransactionVersion.supportsEpochBump()) {
+ // For TV1, manually bump // the epoch in the transaction
metadata we are about to append.
+ txnMetadata.producerEpoch = producerEpoch
+ txnMetadata.lastProducerEpoch = RecordBatch.NO_PRODUCER_EPOCH
Review Comment:
Yeah if I recall correctly, for tv2, I wanted to try to avoid setting fields
outside of the actual transition. It was just this weird epoch fence state that
does things differently.
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