jsancio commented on code in PR #12498:
URL: https://github.com/apache/kafka/pull/12498#discussion_r942961893


##########
core/src/main/scala/kafka/raft/RaftManager.scala:
##########
@@ -181,12 +180,7 @@ class KafkaRaftManager[T](
     val expirationTimer = new SystemTimer("raft-expiration-executor")
     val expirationService = new TimingWheelExpirationService(expirationTimer)
     val quorumStateStore = new FileBasedStateStore(new File(dataDir, 
"quorum-state"))
-
-    val nodeId = if (config.processRoles.contains(ControllerRole)) {
-      OptionalInt.of(config.nodeId)
-    } else {
-      OptionalInt.empty()
-    }
+    val nodeId = OptionalInt.of(config.nodeId)

Review Comment:
   We did this to address this issue: 
https://issues.apache.org/jira/browse/KAFKA-13168. Do you think this is not 
needed anymore because we have this check in `KafkaConfig`?
   ```scala
           // nodeId must not appear in controller.quorum.voters
           require(!voterAddressSpecsByNodeId.containsKey(nodeId),
             s"If ${KafkaConfig.ProcessRolesProp} contains just the 'broker' 
role, the node id $nodeId must not be included in the set of voters 
${KafkaConfig.QuorumVotersProp}=${voterAddressSpecsByNode  
Id.asScala.keySet.toSet}")
   ```



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