jiajunwang commented on a change in pull request #1489:
URL: https://github.com/apache/helix/pull/1489#discussion_r513732287



##########
File path: 
helix-core/src/main/java/org/apache/helix/messaging/handling/HelixTaskExecutor.java
##########
@@ -192,43 +191,38 @@ public void registerMessageHandlerFactory(String type, 
MessageHandlerFactory fac
   @Override
   public void registerMessageHandlerFactory(String type, MessageHandlerFactory 
factory,
       int threadpoolSize) {
-    if (factory instanceof  MultiTypeMessageHandlerFactory) {
+    if (factory instanceof MultiTypeMessageHandlerFactory) {
       if (!((MultiTypeMessageHandlerFactory) 
factory).getMessageTypes().contains(type)) {
         throw new HelixException("Message factory type mismatch. Type: " + 
type + ", factory: "
             + ((MultiTypeMessageHandlerFactory) factory).getMessageTypes());
       }
     } else {
       if (!factory.getMessageType().equals(type)) {
         throw new HelixException(
-            "Message factory type mismatch. Type: " + type + ", factory: " + 
factory.getMessageType());
+            "Message factory type mismatch. Type: " + type + ", factory: " + 
factory
+                .getMessageType());

Review comment:
       This PR is all about non-essential changes that are the preparation for 
the real business logic changes.
   Non-essential does not mean we are not going to do it.




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