jolshan commented on code in PR #18604:
URL: https://github.com/apache/kafka/pull/18604#discussion_r1925843856
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core/src/main/scala/kafka/log/UnifiedLog.scala:
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@@ -600,6 +600,11 @@ class UnifiedLog(@volatile var logStartOffset: Long,
*/
def hasOngoingTransaction(producerId: Long, producerEpoch: Short): Boolean =
lock synchronized {
val entry = producerStateManager.activeProducers.get(producerId)
+ // With transactions V2, if we see a future epoch, we are likely in the
process of completing the previous transaction.
Review Comment:
Ah right. This in theory could be handled still, but if the transaction
completes while adding the partition we hit the race condition. As the code is
now, we don't want to handle this case.
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