[GitHub] [kafka] dengziming commented on a change in pull request #10794: KAFKA-12677: parse envelope response to check if not_controller error existed

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dengziming commented on a change in pull request #10794:
URL: https://github.com/apache/kafka/pull/10794#discussion_r642556841



##########
File path: 
core/src/main/scala/kafka/server/BrokerToControllerChannelManager.scala
##########
@@ -363,6 +386,22 @@ class BrokerToControllerRequestThread(
     }
   }
 
+  def maybeCheckNotControllerErrorInsideEnvelopeResponse(requestHeader: 
RequestHeader, responseBody: AbstractResponse): Boolean = {
+    if (responseBody.isInstanceOf[EnvelopeResponse] && requestHeader != null) {
+      info(s"Trying to find NOT_CONTROLLER exception inside envelope response")
+      val envelopeResponse = responseBody.asInstanceOf[EnvelopeResponse]
+      val envelopeError = envelopeResponse.error()
+
+      if (envelopeError == Errors.NONE) {
+        val response = 
AbstractResponse.parseResponse(envelopeResponse.responseData, requestHeader)
+        envelopeResponse.responseData().rewind()
+        return response.errorCounts().containsKey(Errors.NOT_CONTROLLER)
+      }
+    }
+
+    false;

Review comment:
       nit: unnecessary `;`

##########
File path: 
core/src/main/scala/kafka/server/BrokerToControllerChannelManager.scala
##########
@@ -363,6 +386,22 @@ class BrokerToControllerRequestThread(
     }
   }
 
+  def maybeCheckNotControllerErrorInsideEnvelopeResponse(requestHeader: 
RequestHeader, responseBody: AbstractResponse): Boolean = {

Review comment:
       How about move this to `ForwardingManager` since the envelopResponse and 
envelopRequest are all in `ForwardingManager`




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