fix bug

config/reference_config.go

@@ -143,7 +143,13 @@ func (refconfig *ReferenceConfig) Refer() {
 	}
 
 	//create proxy
-	refconfig.pxy = extension.GetProxyFactory(consumerConfig.ProxyFactory).GetProxy(refconfig.invoker, url)
+	if refconfig.Async {
+		refconfig.pxy = extension.GetProxyFactory(consumerConfig.ProxyFactory).GetProxy(refconfig.invoker, url)
+		callback := GetCallback(refconfig.id)
+		refconfig.pxy = extension.GetProxyFactory(consumerConfig.ProxyFactory).GetAsyncProxy(refconfig.invoker, callback, url)
+	} else {
+		refconfig.pxy = extension.GetProxyFactory(consumerConfig.ProxyFactory).GetProxy(refconfig.invoker, url)
+	}
 }
 
 // @v is service provider implemented RPCService