AndrewJSchofield commented on code in PR #19647:
URL: https://github.com/apache/kafka/pull/19647#discussion_r2075050668


##########
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:
   This is an extremely specific list of exceptions to ignore. I wonder why 
precisely these three make sense.



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