junrao commented on code in PR #16183:
URL: https://github.com/apache/kafka/pull/16183#discussion_r1684690411


##########
core/src/main/scala/kafka/server/BrokerLifecycleManager.scala:
##########
@@ -381,10 +381,12 @@ class BrokerLifecycleManager(
   private def sendBrokerRegistration(): Unit = {
     val features = new BrokerRegistrationRequestData.FeatureCollection()
     _supportedFeatures.asScala.foreach {
-      case (name, range) => features.add(new 
BrokerRegistrationRequestData.Feature().
+      // Do not include features with the range 0-0.
+      case (name, range) if range.max() > 0 => features.add(new 
BrokerRegistrationRequestData.Feature().

Review Comment:
   The main thing is that we need to exclude range 0-0 for supported features 
in ApiVersionResponse too. Colin's code in ApiVersionsResponse doesn't seem to 
do what you are doing here for BrokerRegistrationRequest by excluding range 0-0 
for supported features. It only changes minVersion v0 to v1 for older requests.



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