artemlivshits commented on code in PR #17698:
URL: https://github.com/apache/kafka/pull/17698#discussion_r1861250626
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core/src/main/scala/kafka/coordinator/transaction/TransactionCoordinator.scala:
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@@ -525,6 +558,7 @@ class TransactionCoordinator(txnConfig: TransactionConfig,
producerEpochCopy = txnMetadata.producerEpoch
// PrepareEpochFence has slightly different epoch bumping logic so
don't include it here.
val currentTxnMetadataIsAtLeastTransactionsV2 =
!txnMetadata.pendingState.contains(PrepareEpochFence) &&
txnMetadata.clientTransactionVersion.supportsEpochBump()
+ val incomingEndTxnIsAtLeastTransactionsV2 =
!txnMetadata.pendingState.contains(PrepareEpochFence) &&
clientTransactionVersion.supportsEpochBump()
Review Comment:
Looks like `endTxnEpochBumped` uses
`txnMetadata.clientTransactionVersion.supportsEpochBump()` under the hood.
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