diff --git a/src/communication.py b/src/communication.py
index efcac2a..f3d2da0 100644
--- a/src/communication.py
+++ b/src/communication.py
@@ -39,6 +39,8 @@ class ClusterCommunicationModule():
 
                         cont = self.handle_command(data)
                         if not cont:
+                            self.client_sock.close()
+                            self.client_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
                             break
             elif data == '[CHECK]':             # master side
                 # build docker swarm
@@ -90,13 +92,15 @@ class ClusterCommunicationModule():
             self.client_sock.send(json.dumps(data).encode())
         elif command == '[STOP]':
             print("Receive STOP signal")
-            self.node_manager.docker_client.swarm.leave()
             data = {'host': self.host}
             self.client_sock.send(f'[STOP_CHECK]  {json.dumps(data)}'.encode())
+            self.node_manager.docker_client.swarm.leave()
+            self.node_manager.status = 'none'
 
-            self.node_manager.exit()
+            print("You have leaved the cluster.")
+
+            return False
 
-        return True
 
     def request(self, host):                    # master side
         self.client_sock.connect((host, self.port))
@@ -167,6 +171,7 @@ class ServiceExplorationModule():
         while True:
             data, addr = self.sock.recvfrom(1024)
 
+            print(self.node_manager.status)
             if self.node_manager.status == 'none':
                 if data.decode() == '[EXPLORE]':
                     self.sock.sendto(self.host.encode(), addr)