chia7712 commented on code in PR #16449:
URL: https://github.com/apache/kafka/pull/16449#discussion_r1665940798
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clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
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@@ -1490,6 +1490,8 @@ public void unsubscribe() {
log.error("Failed while waiting for the unsubscribe event
to complete");
}
resetGroupMetadata();
+ } else {
Review Comment:
inspired by @lianetm comments in jira. Maybe we can leverage
`UnsubscribeEvent` to handle the `unsubscribe`. For example:
```java
public void unsubscribe() {
acquireAndEnsureOpen();
try {
fetchBuffer.retainAll(Collections.emptySet());
Timer timer = time.timer(Long.MAX_VALUE);
UnsubscribeEvent unsubscribeEvent = new
UnsubscribeEvent(calculateDeadlineMs(timer));
applicationEventHandler.add(unsubscribeEvent);
log.info("Unsubscribing all topics or patterns and assigned
partitions {}",
subscriptions.assignedPartitions());
try {
processBackgroundEvents(unsubscribeEvent.future(), timer);
log.info("Unsubscribed all topics or patterns and assigned
partitions");
} catch (TimeoutException e) {
log.error("Failed while waiting for the unsubscribe event to
complete");
}
if (groupMetadata.get().isPresent()) resetGroupMetadata();
} catch (Exception e) {
log.error("Unsubscribe failed", e);
throw e;
} finally {
release();
}
}
```
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