jolshan commented on code in PR #19522:
URL: https://github.com/apache/kafka/pull/19522#discussion_r2124459206
##########
clients/src/main/java/org/apache/kafka/clients/producer/internals/TransactionManager.java:
##########
@@ -771,6 +773,15 @@ public synchronized void
maybeTransitionToErrorState(RuntimeException exception)
|| exception instanceof InvalidPidMappingException) {
transitionToFatalError(exception);
} else if (isTransactional()) {
+ // RetriableExceptions from the Sender thread are converted to
Abortable errors
+ // because they indicate that the transaction cannot be completed
after all retry attempts.
+ // This conversion ensures the application layer treats these
errors as abortable,
+ // preventing duplicate message delivery.
Review Comment:
maybe not a change we need now, but it isn't totally clear from the method
name that this should only be called from the sender thread. Maybe we should
refactor this in the future.
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