jolshan commented on code in PR #13579:
URL: https://github.com/apache/kafka/pull/13579#discussion_r1168901227
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core/src/main/scala/kafka/coordinator/transaction/TransactionCoordinator.scala:
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@@ -396,8 +397,14 @@ class TransactionCoordinator(txnConfig: TransactionConfig,
} else if (txnMetadata.producerEpoch != producerEpoch) {
Left(Errors.PRODUCER_FENCED)
} else if (txnMetadata.pendingTransitionInProgress) {
- // return a retriable exception to let the client backoff and retry
- Left(Errors.CONCURRENT_TRANSACTIONS)
+ // If we are in the produce path, we want to avoid
OutOfOrderSequence errors if the added partition is pending.
+ // TODO: Part 2 of KIP-890 will always start transactions with
sequence 0, so we enforce that and avoid this workaround.
Review Comment:
I can remove the "TODO" parts of the comments.
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