jolshan commented on code in PR #17698:
URL: https://github.com/apache/kafka/pull/17698#discussion_r1851078539
##########
core/src/main/scala/kafka/coordinator/transaction/TransactionCoordinator.scala:
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@@ -498,6 +498,45 @@ class TransactionCoordinator(txnConfig: TransactionConfig,
requestLocal)
}
+ /*
+ The state transition for Empty, CompleteAbort, CompleteCommit is
complicated, so here is a table to make it clear.
+ Note:
+ PF = PRODUCER_FENCED
+ ITS = INVALID_TXN_STATE
+ NONE = No error and no epoch bump
+ EB = No error and epoch bump
+
+ Retry => producerEpoch = txnState.ProducerEpoch - 1
Review Comment:
I think that one was the only transition that didn't make sense to me.
Thanks for enumerating it out.
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