rondagostino commented on a change in pull request #11503:
URL: https://github.com/apache/kafka/pull/11503#discussion_r751509017



##########
File path: core/src/main/scala/kafka/server/KafkaConfig.scala
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@@ -2007,8 +2007,13 @@ class KafkaConfig private(doLog: Boolean, val props: 
java.util.Map[_, _], dynami
       "offsets.commit.required.acks must be greater or equal -1 and less or 
equal to offsets.topic.replication.factor")
     require(BrokerCompressionCodec.isValid(compressionType), "compression.type 
: " + compressionType + " is not valid." +
       " Valid options are " + 
BrokerCompressionCodec.brokerCompressionOptions.mkString(","))
-    require(!processRoles.contains(ControllerRole) || 
controllerListeners.nonEmpty,
-      s"${KafkaConfig.ControllerListenerNamesProp} cannot be empty if the 
server has the controller role")
+    if (usesSelfManagedQuorum) {

Review comment:
       Pushed a commit that does the following:
   
   - Ensure control plane listener is empty
   - If process.roles=broker then don't allow the listeners to contain 
controller.listener.names
   - When process.roles=controller,* then require controller.listener.names is 
set and listeners contains controller.listener.names
   
   Still need to verify port consistency between the controller listener and 
the quorum voter string.  There is some subtlety regarding what the right thing 
to do is on a broker-only node vs one that has the controller node, which I 
will have to think about a bit.




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