Python [Errno 98] Address already in use

Question

In my Python socket program, I sometimes need to interrupt it with Ctrl-C. When I do this, it does close the connection using socket.close().

Answer 1

Yes, it is intended. Here you can read detailed explanation. It is possible to override this behavior by setting SO_REUSEADDR option on a socket. For example:

sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

Answer 2

Got the same error :
Steps followed :
1 - used $ ps -fA | grep python
2 - Killed all the process
3 - Closed terminal
4 - relaunced and launched the application ( mkchromecast).
5 - did not get this error message.

Got another issue. following up on that .

Answer 3

because you trying to run service in same port that is already running.

some time its happen because your service is not stopped in process stack. you have to kill them

no need to install anything here is the one line command to kill all running python processes.

for Linux based OS:

Bash:

kill -9 $(ps -A | grep python | awk '{print $1}')

Fish:

kill -9 (ps -A | grep python | awk '{print $1}')

Answer 4

run the command

fuser -k (port_number_you_are _trying_to_access)/TCP

example for flask: fuser -k 5000/tcp

Also, remember this error arises when you interput by ctrl+z. so to terminate use ctrl+c

Answer 5

First of all find the python process ID using this command

ps -fA | grep python

You will get a pid number by naming of your python process on second column

Then kill the process using this command

kill -9 pid

Answer 6

Nothing worked for me except running a subprocess with this command, before calling HTTPServer(('', 443), myHandler):

kill -9 $(lsof -ti tcp:443)

Of course this is only for linux-like OS!