ShivsundarR commented on code in PR #19647:
URL: https://github.com/apache/kafka/pull/19647#discussion_r2080076709


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/ShareConsumerImpl.java:
##########
@@ -1017,8 +1017,12 @@ private void maybeThrowInvalidGroupIdException() {
      * <p>
      * If the acknowledgement commit callback throws an exception, this method 
will throw an exception.
      */
-    private void handleCompletedAcknowledgements() {
-        processBackgroundEvents();
+    private void handleCompletedAcknowledgements(boolean onClose) {
+        // If the user gets any fatal errors, they will get these exceptions 
in the background queue.
+        // While closing, we ignore these exceptions so that the consumers 
close successfully.
+        processBackgroundEvents(onClose ? e -> (e instanceof 
GroupAuthorizationException

Review Comment:
   Thanks @lianetm for the context here, this really helps.
   Yes I did take a look at `handleTopicMetadata` in `KafkaApis`, I could not 
find any topic/auth related errors that we are missing. There could still be 
retriable errors received in the metadata response but those are not propagated 
to the application thread, so we need not add them here.
   The current checks seem to cover all the cases then.



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