lianetm commented on code in PR #14690: URL: https://github.com/apache/kafka/pull/14690#discussion_r1383962388
########## clients/src/main/java/org/apache/kafka/clients/consumer/internals/PrototypeAsyncConsumer.java: ########## @@ -843,7 +845,15 @@ private void updatePatternSubscription(Cluster cluster) { @Override public void unsubscribe() { fetchBuffer.retainAll(Collections.emptySet()); - subscriptions.unsubscribe(); + UnsubscribeApplicationEvent unsubscribeApplicationEvent = new UnsubscribeApplicationEvent(); + applicationEventHandler.add(unsubscribeApplicationEvent); + unsubscribeApplicationEvent.future().whenComplete((result, error) -> { + if (error != null) { + // Callback failed - Keeping same exception message thrown by the legacy consumer + throw new KafkaException("User rebalance callback throws an error", error); Review Comment: You're right, it should happen in the poll to maintain the current contract. I will just remove it since we don't execute callbacks yet, and it should be included in the PR that introduces the callback execution. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org