TaiJuWu commented on code in PR #17165:
URL: https://github.com/apache/kafka/pull/17165#discussion_r1762204798
##########
clients/src/test/java/org/apache/kafka/clients/consumer/KafkaConsumerTest.java:
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@@ -3443,6 +3443,33 @@ public void testPreventMultiThread(GroupProtocol
groupProtocol) throws Interrupt
}
}
+ @ParameterizedTest
+ @EnumSource(value = GroupProtocol.class)
+ public void testPollSendRequestForRebalance(GroupProtocol groupProtocol)
throws InterruptedException {
+ ConsumerMetadata metadata = createMetadata(subscription);
+ MockClient client = new MockClient(time, metadata);
+ initMetadata(client, Collections.singletonMap(topic, 1));
+ Node node = metadata.fetch().nodes().get(0);
+
+
client.prepareResponseFrom(FindCoordinatorResponse.prepareResponse(Errors.NONE,
groupId, node), node);
+ KafkaConsumer<String, String> consumer = newConsumer(groupProtocol,
time, client, subscription, metadata,
+ assignor, true, groupInstanceId);
+ consumer.subscribe(singletonList(topic));
Review Comment:
Sorry for unclear.
Make `application` sleep here is just for making `network` have time to send
`join request` without poll in original code.
It can help to reproduce this bug easier and more stable, the test can pass
sometime without it.
In order to make sure this behavior which we promise in docs, two operation
should not too close in timeline. Does it make sense?
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