cmccabe commented on a change in pull request #9100:
URL: https://github.com/apache/kafka/pull/9100#discussion_r465712943



##########
File path: 
core/src/main/scala/kafka/server/BrokerToControllerChannelManager.scala
##########
@@ -113,8 +113,8 @@ class BrokerToControllerChannelManager(metadataCache: 
kafka.server.MetadataCache
       brokerToControllerListenerName, time, threadName)
   }
 
-  private[server] def sendRequest(request: AbstractRequest.Builder[_ <: 
AbstractRequest],
-                                  callback: RequestCompletionHandler): Unit = {
+  def sendRequest(request: AbstractRequest.Builder[_ <: AbstractRequest],
+                  callback: RequestCompletionHandler): Unit = {
     requestQueue.put(BrokerToControllerQueueItem(request, callback))

Review comment:
       This also needs to call `NetworkClient#wake` in case we are blocking 
inside `NetworkClient#poll`




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