TaiJuWu commented on code in PR #16638: URL: https://github.com/apache/kafka/pull/16638#discussion_r1687898103
########## clients/src/test/java/org/apache/kafka/clients/consumer/KafkaConsumerTest.java: ########## @@ -2965,7 +2970,28 @@ public void testSubscriptionOnInvalidTopic(GroupProtocol groupProtocol) { KafkaConsumer<String, String> consumer = newConsumer(groupProtocol, time, client, subscription, metadata, assignor, true, groupInstanceId); consumer.subscribe(singleton(invalidTopicName), getConsumerRebalanceListener(consumer)); - assertThrows(InvalidTopicException.class, () -> consumer.poll(Duration.ZERO)); + if (groupProtocol == GroupProtocol.CONSUMER) { + // New consumer poll(ZERO) needs to wait for the event added by a call to poll, to be processed + // by the background thread, so it can realize there is invalid topics and then + // throw the InvalidTopicException + assertPollEventuallyThrows(consumer, InvalidTopicException.class, + "Consumer was not able to update fetch positions on continuous calls with 0 timeout"); + } else { + assertThrows(InvalidTopicException.class, () -> consumer.poll(Duration.ZERO)); + } + } + + private <T extends Throwable> void assertPollEventuallyThrows(KafkaConsumer<?, ?> consumer, Review Comment: It can be static function, update later. -- 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