FrankYang0529 commented on code in PR #17244:
URL: https://github.com/apache/kafka/pull/17244#discussion_r1779660566
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
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@@ -1476,7 +1481,10 @@ public void unsubscribe() {
subscriptions.assignedPartitions());
try {
- processBackgroundEvents(unsubscribeEvent.future(), timer);
+ // If users subscribe to an invalid topic name, they will get
InvalidTopicException in error events,
+ // because network thread keeps trying to send MetadataRequest
in the background.
+ // Ignore it to avoid unsubscribe failed.
+ processBackgroundEvents(unsubscribeEvent.future(), timer, e ->
e instanceof InvalidTopicException);
Review Comment:
Create a followup Jira https://issues.apache.org/jira/browse/KAFKA-17648.
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