chia7712 commented on code in PR #16638:
URL: https://github.com/apache/kafka/pull/16638#discussion_r1685701571
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clients/src/test/java/org/apache/kafka/clients/consumer/KafkaConsumerTest.java:
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@@ -2965,7 +2976,21 @@ 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 (isAyncConsumer(groupProtocol)) {
+ // 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
+ TestUtils.waitForCondition(() -> {
Review Comment:
`isAyncConsumer` is simple enough, and the method needing helper is
`TestUtils.waitForCondition` :)
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