gateway error while finding mismatched public key

[jihoonl]

[INFO] [WallTime: 1440979151.379859] Gateway : lost connection with hub, attempting to disconnect...
[INFO] [WallTime: 1440979154.900595] Gateway : disengaged connection with the hub [xavier][192.168.10.32:6380]
[INFO] [WallTime: 1440979155.144766] Gateway : Found existing mismatched public key on the hub. Requesting resend for all flip-ins.
Exception in thread Thread-4:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
    self.run()
  File "/home/yujin/ros/turtlebot/src/rocon_multimaster/rocon_hub_client/src/rocon_hub_client/hub_discovery.py", line 97, in run 
    self._process_new_services(new_services, unresolvable_hub)
  File "/home/yujin/ros/turtlebot/src/rocon_multimaster/rocon_hub_client/src/rocon_hub_client/hub_discovery.py", line 150, in _process_new_services
    result, reason = self.discovery_update_hook(ip, port)
  File "/home/yujin/ros/turtlebot/src/rocon_multimaster/rocon_gateway/src/rocon_gateway/gateway_node.py", line 148, in _register_gateway
    existing_advertisements
  File "/home/yujin/ros/turtlebot/src/rocon_multimaster/rocon_gateway/src/rocon_gateway/hub_manager.py", line 225, in connect_to_hub
    new_hub.advertise(advertisement)
  File "/home/yujin/ros/turtlebot/src/rocon_multimaster/rocon_gateway/src/rocon_gateway/gateway_hub.py", line 539, in advertise
    self._redis_server.sadd(key, msg_str)
  File "/home/yujin/ros/turtlebot/src/rocon_tools/rocon_python_redis/src/rocon_python_redis/client.py", line 881, in sadd
    return self.execute_command('SADD', name, *values)
  File "/home/yujin/ros/turtlebot/src/rocon_tools/rocon_python_redis/src/rocon_python_redis/client.py", line 349, in execute_command
    connection.send_command(*args)
  File "/home/yujin/ros/turtlebot/src/rocon_tools/rocon_python_redis/src/rocon_python_redis/connection.py", line 300, in send_command
    self.send_packed_command(self.pack_command(*args))
  File "/home/yujin/ros/turtlebot/src/rocon_tools/rocon_python_redis/src/rocon_python_redis/connection.py", line 282, in send_packed_command
    self.connect()
  File "/home/yujin/ros/turtlebot/src/rocon_tools/rocon_python_redis/src/rocon_python_redis/connection.py", line 229, in connect
    raise ConnectionError(self._error_message(e))
ConnectionError: Error connecting to 192.168.10.32:6380. timed out.

[WARN] [WallTime: 1440979168.542225] Gatew Hub pinger : Error connecting to 192.168.10.32:6380. timed out.
[INFO] [WallTime: 1440979168.542743] Gateway : lost connection with hub, attempting to disconnect...