hachikuji commented on a change in pull request #9349:
URL: https://github.com/apache/kafka/pull/9349#discussion_r497681395
##########
File path:
clients/src/test/java/org/apache/kafka/clients/consumer/KafkaConsumerTest.java
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@@ -1994,6 +1995,24 @@ public void testGetGroupMetadata() {
assertEquals(groupInstanceId,
groupMetadataAfterPoll.groupInstanceId());
}
+ @Test
+ public void testInvalidGroupMetadata() {
+ Properties props = new Properties();
+ props.setProperty(ConsumerConfig.BOOTSTRAP_SERVERS_CONFIG,
"localhost:9999");
+ props.setProperty(ConsumerConfig.METRIC_REPORTER_CLASSES_CONFIG,
MockMetricsReporter.class.getName());
+ KafkaConsumer<String, String> consumer = new KafkaConsumer<>(
+ props, new StringDeserializer(), new StringDeserializer());
+
+ // concurrent access is illegal
+ consumer.currentThread.set(123);
Review comment:
Another way to test this might be to use
`MockClient.enableBlockingUntilWakeup`. That would let us block in
`Consumer.poll`.
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