diff --git a/nni/experiment/experiment.py b/nni/experiment/experiment.py
index c7cb5ecf97..d521b57506 100644
--- a/nni/experiment/experiment.py
+++ b/nni/experiment/experiment.py
@@ -127,7 +127,7 @@ def start(self, port: int = 8080, debug: bool = False) -> None:
 
         # dispatcher must be launched after pipe initialized
         # the logic to launch dispatcher in background should be refactored into dispatcher api
-        self._dispatcher = MsgDispatcher(self.tuner, None)
+        self._dispatcher = self._create_dispatcher()
         self._dispatcher_thread = Thread(target=self._dispatcher.run)
         self._dispatcher_thread.start()
 
@@ -140,6 +140,9 @@ def start(self, port: int = 8080, debug: bool = False) -> None:
         msg = 'Web UI URLs: ' + colorama.Fore.CYAN + ' '.join(ips) + colorama.Style.RESET_ALL
         _logger.info(msg)
 
+    def _create_dispatcher(self):  # overrided by retiarii, temporary solution
+        return MsgDispatcher(self.tuner, None)
+
 
     def stop(self) -> None:
         """
diff --git a/nni/retiarii/experiment.py b/nni/retiarii/experiment.py
index 8bfb5c303d..7ebe5f1c96 100644
--- a/nni/retiarii/experiment.py
+++ b/nni/retiarii/experiment.py
@@ -159,34 +159,11 @@ def start(self, port: int = 8080, debug: bool = False) -> None:
         debug
             Whether to start in debug mode.
         """
-        atexit.register(self.stop)
-
-        if debug:
-            logging.getLogger('nni').setLevel(logging.DEBUG)
-
-        self._proc, self._pipe = launcher.start_experiment(self.config, port, debug)
-        assert self._proc is not None
-        assert self._pipe is not None
-
-        self.port = port  # port will be None if start up failed
-
-        # dispatcher must be created after pipe initialized
-        # the logic to launch dispatcher in background should be refactored into dispatcher api
-        self._dispatcher_thread = Thread(target=self._dispatcher.run)
-        self._dispatcher_thread.start()
-
+        super().start(port, debug)
         self._start_strategy()
 
-        ips = [self.config.nni_manager_ip]
-        for interfaces in psutil.net_if_addrs().values():
-            for interface in interfaces:
-                if interface.family == socket.AF_INET:
-                    ips.append(interface.address)
-        ips = [f'http://{ip}:{port}' for ip in ips if ip]
-        msg = 'Web UI URLs: ' + colorama.Fore.CYAN + ' '.join(ips)
-        _logger.info(msg)
-
-        # TODO: register experiment management metadata
+    def _create_dispatcher(self):
+        return self._dispatcher
 
     def run(self, config: RetiariiExeConfig = None, port: int = 8080, debug: bool = False) -> str:
         """