Connection timed out？

[TonyRenHK]

any idea?

Traceback (most recent call last):
File "nightminer.py", line 954, in
miner.serve_forever()
File "nightminer.py", line 829, in serve_forever
sock.connect((hostname, port))
File "/usr/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 110] Connection timed out