dajac commented on code in PR #17964:
URL: https://github.com/apache/kafka/pull/17964#discussion_r1862607964


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clients/src/main/java/org/apache/kafka/clients/consumer/internals/ConsumerMetadata.java:
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@@ -68,7 +68,7 @@ public boolean allowAutoTopicCreation() {
 
     @Override
     public synchronized MetadataRequest.Builder newMetadataRequestBuilder() {
-        if (subscription.hasPatternSubscription())
+        if (subscription.hasPatternSubscription() || 
subscription.hasRe2JPatternSubscription())

Review Comment:
   This is correct for when the consumer subscribed by topic names or by 
server-side regex. They are actually the same. The only exception is the 
client-side regex but this will be deprecated soon.
   
   Overall, I would say that we should update the subscription state to operate 
with topic ids. This could also allow use to simplify the membership manager. 
We have been talking about doing this for a while now but we never this. It may 
be the time.



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