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 with the current code,
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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