How to 'clear' the port when restarting django runserver

If the ps aux command (as per Meilo's answer) doesn't list the process that you wanted to kill but shows the port active in netstat -np | grep 8004 network activity, try this command (worked on Ubuntu).

sudo fuser -k 8004/tcp

where as, 8004 is the port number that you want to close. This should kill all the processes associated with port 8004.

No, he's not an idiot guys. Same thing happens to me. Apparently it's a bug with the python UUID process with continues running long after the django server is shutdown which ties the port up.

You're getting that message because the server is already running (possibly in the background). Make sure to kill the process (bring it to the foreground and press ctrl-c) to stop the process.

I found this information (originally from Kristinn Örn Sigurðsson) to solve my problem:

To kill it with -9 you will have to list all running manage.py processes, for instance:

ps aux | grep -i manage

You'll get an output similar to this if you've started on many ports:

14770     8264  0.0  1.9 546948 40904 ?        S    Sep19   0:00 /usr/local/bin/python manage.py runserver 0.0.0.0:8006
14770    15215  0.0  2.7 536708 56420 ?        S    Sep13   0:00 /usr/local/bin/python manage.py runserver 0.0.0.0:8001
14770    30144  0.0  2.1 612488 44912 ?        S    Sep18   0:00 /usr/local/bin/python manage.py runserver 0.0.0.0:8000
14770    30282  0.0  1.9 678024 40104 ?        S    Sep18   0:00 /usr/local/bin/python manage.py runserver 0.0.0.0:8002
14770    30592  0.0  2.1 678024 45008 ?        S    Sep18   0:00 /usr/local/bin/python manage.py runserver 0.0.0.0:8003
14770    30743  0.0  2.1 678024 45044 ?        S    Sep18   0:00 /usr/local/bin/python manage.py runserver 0.0.0.0:8004

Then you'll have to select the pid (which is the second number on the left) for the right manage.py process (python manage.py runserver... etc) and do:

kill -9 pid

For the above example, if you wanted to free up port 8000, you'd do:

kill -9 30144