chickenlj commented on a change in pull request #9723:
URL: https://github.com/apache/dubbo/pull/9723#discussion_r832843981



##########
File path: 
dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/DubboProtocol.java
##########
@@ -702,6 +728,8 @@ public void destroy() {
             }
         }
         referenceClientMap.clear();
+        
+        stubServiceToLatch.clear();

Review comment:
       I think we should take destroy of stubServiceToLatch on destroy of stub 
proxy too.
   
   There might have lots of proxy invokers (reference config) create and 
destroy during the lifetime of DubboProtocol.

##########
File path: 
dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/DubboProtocol.java
##########
@@ -702,6 +728,8 @@ public void destroy() {
             }
         }
         referenceClientMap.clear();
+        
+        stubServiceToLatch.clear();

Review comment:
       I  don't think waiting for the stub to be ready is necessary for it will 
make the whole process more complicated. Just giving a more elegant and clear 
Exception or result would be enough. What do you think? @BurningCN 

##########
File path: 
dubbo-rpc/dubbo-rpc-dubbo/src/main/java/org/apache/dubbo/rpc/protocol/dubbo/DubboProtocol.java
##########
@@ -253,7 +276,8 @@ private boolean isClientSide(Channel channel) {
         // if it's callback service on client side
         isStubServiceInvoke = 
Boolean.TRUE.toString().equals(inv.getObjectAttachments().get(STUB_EVENT_KEY));
         if (isStubServiceInvoke) {
-            port = channel.getRemoteAddress().getPort();
+            // The port of the client exposed stub service is 0
+            port = 0;

Review comment:
       One similar PR has been merged into the master branch
   
   https://github.com/apache/dubbo/pull/9825




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