Phuc-Hong-Tran commented on code in PR #15585:
URL: https://github.com/apache/kafka/pull/15585#discussion_r1554466415


##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AsyncKafkaConsumer.java:
##########
@@ -1750,8 +1753,14 @@ private void subscribeInternal(Pattern pattern, 
Optional<ConsumerRebalanceListen
             throwIfNoAssignorsConfigured();
             log.info("Subscribed to pattern: '{}'", pattern);
             subscriptions.subscribe(pattern, listener);
-            updatePatternSubscription(metadata.fetch());
             metadata.requestUpdateForNewTopics();
+            Cluster cache = metadata.fetch();
+
+            while (cache == metadata.fetch()) {
+                log.info("Waiting for new metadata update");
+            }

Review Comment:
   @lianetm, I understand, will fix it accordingly



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