ijuma commented on code in PR #18464:
URL: https://github.com/apache/kafka/pull/18464#discussion_r1910473777


##########
core/src/main/scala/kafka/server/KafkaApis.scala:
##########
@@ -2590,89 +2588,11 @@ class KafkaApis(val requestChannel: RequestChannel,
   }
 
   def handleAlterPartitionReassignmentsRequest(request: 
RequestChannel.Request): Unit = {
-    val zkSupport = 
metadataSupport.requireZkOrThrow(KafkaApis.shouldAlwaysForward(request))
-    authHelper.authorizeClusterOperation(request, ALTER)
-    val alterPartitionReassignmentsRequest = 
request.body[AlterPartitionReassignmentsRequest]
-
-    def sendResponseCallback(result: Either[Map[TopicPartition, ApiError], 
ApiError]): Unit = {
-      val responseData = result match {
-        case Right(topLevelError) =>
-          new 
AlterPartitionReassignmentsResponseData().setErrorMessage(topLevelError.message).setErrorCode(topLevelError.error.code)
-
-        case Left(assignments) =>
-          val topicResponses = assignments.groupBy(_._1.topic).map {
-            case (topic, reassignmentsByTp) =>
-              val partitionResponses = reassignmentsByTp.map {
-                case (topicPartition, error) =>
-                  new 
ReassignablePartitionResponse().setPartitionIndex(topicPartition.partition)
-                    
.setErrorCode(error.error.code).setErrorMessage(error.message)
-              }
-              new 
ReassignableTopicResponse().setName(topic).setPartitions(partitionResponses.toList.asJava)
-          }
-          new 
AlterPartitionReassignmentsResponseData().setResponses(topicResponses.toList.asJava)
-      }
-
-      requestHelper.sendResponseMaybeThrottle(request, requestThrottleMs =>
-        new 
AlterPartitionReassignmentsResponse(responseData.setThrottleTimeMs(requestThrottleMs))
-      )
-    }
-
-    val reassignments = 
alterPartitionReassignmentsRequest.data.topics.asScala.flatMap {
-      reassignableTopic => reassignableTopic.partitions.asScala.map {
-        reassignablePartition =>
-          val tp = new TopicPartition(reassignableTopic.name, 
reassignablePartition.partitionIndex)
-          if (reassignablePartition.replicas == null)
-            tp -> None // revert call
-          else
-            tp -> Some(reassignablePartition.replicas.asScala.map(_.toInt))
-      }
-    }.toMap
-
-    zkSupport.controller.alterPartitionReassignments(reassignments, 
sendResponseCallback)
+    throw KafkaApis.shouldNeverReceive(request)

Review Comment:
   Same thing I said here: 
https://github.com/apache/kafka/pull/18465/files#r1910472130



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