artemlivshits commented on code in PR #21735:
URL: https://github.com/apache/kafka/pull/21735#discussion_r4244528312
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core/src/main/scala/kafka/coordinator/transaction/TransactionCoordinator.scala:
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@@ -441,7 +459,13 @@ class TransactionCoordinator(txnConfig: TransactionConfig,
} else if (txnMetadata.producerId != producerId) {
Left(Errors.INVALID_PRODUCER_ID_MAPPING)
} else if (txnMetadata.producerEpoch != producerEpoch) {
- Left(Errors.PRODUCER_FENCED)
+ // Check if client is using the client-facing epoch
(nextProducerEpoch) after calling
+ // InitProducerId(keepPreparedTxn=true). Adding partitions is
not allowed in this state.
Review Comment:
Will do.
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