python socket.error: [Errno 98] Address already in use [closed]

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when i setup application.py, it shows that socket.error: [Errno 98] Address already in use.

Traceback (most recent call last):
File "application.py", line 121, in <module>
main()
File "application.py", line 117, in main
http_server.listen(options.port)
File "/usr/local/lib/python2.7/site-packages/tornado-3.1-py2.7.egg/tornado/tcpserver.py", line 117, in listen
sockets = bind_sockets(port, address=address)
File "/usr/local/lib/python2.7/site-packages/tornado-3.1-py2.7.egg/tornado/netutil.py", line 90, in bind_sockets
sock.bind(sockaddr)
File "/usr/local/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
socket.error: [Errno 98] Address already in use

If you know the address it is trying to use, then you can find out what else is holding that address with netstat. — Luke
– Luke, Commented Jul 22, 2013 at 5:11

Sam R. · Accepted Answer · 2014-08-24 21:52:28Z

165

There is obviously another process listening on the port. You might find out that process by using the following command:

$ lsof -i :8000

or change your tornado app's port. tornado's error info not Explicitly on this.

edited Aug 24, 2014 at 21:52

Sam R.

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answered Jul 22, 2013 at 5:28

the5fire

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10 Comments

Yushan Over a year ago

This answer didn't work under my case where a socket is created by Python application and th application is forced exit. Please follow the link and see the answer by ayoub laaziz

Inverbis Over a year ago

Worked for me with sudo and port 5000 (for a Flask app), e.g. sudo lsof -i :5000 to detect the process listening on the port, and then sudo kill -9 <process_id>

ytu Over a year ago

Nothing shows up after I execute this command (even sudo lsof -i :8000), but still I am getting the same error. :(

ScipioAfricanus Over a year ago

I am using sudo didnt show anything op.

EricLavault Over a year ago

For those facing this issue with nothing coming up from netstat or lsof, if you are testing/restarting a script that makes a call to socket.bind(), you may find that the address may still be in use for a while even after killing the involved process : checkout this answer.

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