Django Server Error: port is already in use
Question:
Restarting the Django server displays the following error:
this port is already running....
This problem occurs specifically on Ubuntu and not other operating systems. How can I free up the port to restart the server?
Answers:
ps aux | grep -i manage
after that you will see all process
ubuntu@ip-10-154-22-113:~/django-apps/projectname$ ps aux | grep -i manage
ubuntu 3439 0.0 2.3 40228 14064 pts/0 T 06:47 0:00 python manage.py runserver project name
ubuntu 3440 1.4 9.7 200996 59324 pts/0 Tl 06:47 2:52 /usr/bin/python manage.py runserver project name
ubuntu 4581 0.0 0.1 7988 892 pts/0 S+ 10:02 0:00 grep --color=auto -i manage
kill -9 process id
e.d kill -9 3440
`enter code here`after that :
python manage.py runserver project name
A more simple solution just type sudo fuser -k 8000/tcp.
This should kill all the processes associated with port 8000.
EDIT:
For osx users you can use sudo lsof -t -i tcp:8000 | xargs kill -9
This is an expansion on Mounir’s answer. I’ve added a bash script that covers this for you. Just run ./scripts/runserver.sh instead of ./manage.py runserver and it’ll work exactly the same way.
#!/bin/bash
pid=$(ps aux | grep "./manage.py runserver" | grep -v grep | head -1 | xargs | cut -f2 -d" ")
if [[ -n "$pid" ]]; then
kill $pid
fi
fuser -k 8000/tcp
./manage.py runserver
netstat -ntlp
It will show something like this.
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:8000 0.0.0.0:* LISTEN 6599/python
tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN -
tcp 0 0 192.168.124.1:53 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN -
tcp6 0 0 :::3306 :::* LISTEN
So now just close the port in which Django/python running already by killing the process associated with it.
kill -9 PID
in my case
kill -9 6599
Now run your Django app.
We don’t use this command { sudo lsof -t -i tcp:8000 | xargs kill -9 } Because it’s close all tabs…You should use to
ps -ef | grep python
kill -9 process_id
ps -ef | grep python (show all process with id)
kill -9 11633
(11633 is a process id to :- /bin/python manage.py runserver)
>> ps aux | grep manage
ubuntu 3438 127.0.0 2.3 40256 14064 pts/0 T 06:47 0:00 python manage.py runserver
>> kill -9 3438
By default, the runserver command starts the development server on the internal IP at port 8000.
If you want to change the server’s port, pass it as a command-line argument. For instance, this command starts the server on port 8080:
python manage.py runserver 8080
For me, this happens because my API request in Postman is being intercepted by a debugger breakpoint in my app… leaving the request hanging. If I cancel the request in Postman before killing my app’s server, the error does not happen in the first place.
–> So try cancelling any open requests you are making in other programs.
On macOS, I have been using sudo lsof -t -i tcp:8000 | xargs kill -9 when I forget to cancel the open http request in order to solve error = That port is already in use. This also, complete closes my Postman app, which is why my first solution is better.
Type ‘fg’ as command after that Ctrl-C.
Command:
Fg will show which is running on background. After that Ctrl-C will stop it.
fg
ctl-c
if you have face this problem in mac you just need to open activity monitor and force quite python then try again
lsof -t -i tcp:8000 | xargs kill -9
Sorry for comment in an old post but It may help people
Just type this on your terminal
killall -9 python3
It will kill all python3 running on your machine and it will free your all port. Greatly help me when to work in Django project.
In case You are using the VSC’s screen terminal, The error might be due to the fact that you already runserver in some other shell.
Just click on the dropbox on the left of the + sign in the header of the terminal of VSC and select some other shell and check if the server is already running there. Quit that server and you are ready to launch a another server.
Click the arrow in the screenshot and find the bash with already running Django server. You were getting the message because your server was already running and you tried to start the server again.
Dont use CTRL + Z to stop server, use CTRL + C to stop the server, I had also had the same problem in my linux (fedora) , I used to stop the server using CTRL + Z and again I used to kill the server using sudo fuser -k 8000/tcp command, which worked fine. But later when I started using CTRL + C , I didnot get that port running issue anymore.
- In terminal, Type
ps aux | grep runserver
- Hit Enter
- Use PID among the result execute
kill -9 <PID>
For an instance, If result of step 1 is as follow
root 1041 0.0 0.1 266912 34580 pts/3 S+ 11:31 0:01 python3 manage.py runserver 0.0.0.0:3030
root 1696 4.5 0.1 126128 40708 ? S Feb14 925:43 /usr/local/bin/python manage.py runserver 0.0.0.0:8000
1041 and 1696 are PIDs. We need to choose whichever process we want to kill among them.
I was trying all the solutions but they were not working i suggest you to keep press the power button or if your battery is removeable then remove it all the process will be killed and your local host will be reset
Restarting the Django server displays the following error:
this port is already running....
This problem occurs specifically on Ubuntu and not other operating systems. How can I free up the port to restart the server?
ps aux | grep -i manage
after that you will see all process
ubuntu@ip-10-154-22-113:~/django-apps/projectname$ ps aux | grep -i manage
ubuntu 3439 0.0 2.3 40228 14064 pts/0 T 06:47 0:00 python manage.py runserver project name
ubuntu 3440 1.4 9.7 200996 59324 pts/0 Tl 06:47 2:52 /usr/bin/python manage.py runserver project name
ubuntu 4581 0.0 0.1 7988 892 pts/0 S+ 10:02 0:00 grep --color=auto -i manage
kill -9 process id
e.d kill -9 3440
`enter code here`after that :
python manage.py runserver project name
A more simple solution just type sudo fuser -k 8000/tcp.
This should kill all the processes associated with port 8000.
EDIT:
For osx users you can use sudo lsof -t -i tcp:8000 | xargs kill -9
This is an expansion on Mounir’s answer. I’ve added a bash script that covers this for you. Just run ./scripts/runserver.sh instead of ./manage.py runserver and it’ll work exactly the same way.
#!/bin/bash
pid=$(ps aux | grep "./manage.py runserver" | grep -v grep | head -1 | xargs | cut -f2 -d" ")
if [[ -n "$pid" ]]; then
kill $pid
fi
fuser -k 8000/tcp
./manage.py runserver
netstat -ntlp
It will show something like this.
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:8000 0.0.0.0:* LISTEN 6599/python
tcp 0 0 127.0.0.1:27017 0.0.0.0:* LISTEN -
tcp 0 0 192.168.124.1:53 0.0.0.0:* LISTEN -
tcp 0 0 127.0.0.1:631 0.0.0.0:* LISTEN -
tcp6 0 0 :::3306 :::* LISTEN
So now just close the port in which Django/python running already by killing the process associated with it.
kill -9 PID
in my case
kill -9 6599
Now run your Django app.
We don’t use this command { sudo lsof -t -i tcp:8000 | xargs kill -9 } Because it’s close all tabs…You should use to
ps -ef | grep python
kill -9 process_id
ps -ef | grep python (show all process with id)
kill -9 11633
(11633 is a process id to :- /bin/python manage.py runserver)
>> ps aux | grep manage
ubuntu 3438 127.0.0 2.3 40256 14064 pts/0 T 06:47 0:00 python manage.py runserver
>> kill -9 3438
By default, the runserver command starts the development server on the internal IP at port 8000.
If you want to change the server’s port, pass it as a command-line argument. For instance, this command starts the server on port 8080:
python manage.py runserver 8080
For me, this happens because my API request in Postman is being intercepted by a debugger breakpoint in my app… leaving the request hanging. If I cancel the request in Postman before killing my app’s server, the error does not happen in the first place.
–> So try cancelling any open requests you are making in other programs.
On macOS, I have been using sudo lsof -t -i tcp:8000 | xargs kill -9 when I forget to cancel the open http request in order to solve error = That port is already in use. This also, complete closes my Postman app, which is why my first solution is better.
Type ‘fg’ as command after that Ctrl-C.
Command:
Fg will show which is running on background. After that Ctrl-C will stop it.
fg
ctl-c
if you have face this problem in mac you just need to open activity monitor and force quite python then try again
lsof -t -i tcp:8000 | xargs kill -9
Sorry for comment in an old post but It may help people
Just type this on your terminal
killall -9 python3
It will kill all python3 running on your machine and it will free your all port. Greatly help me when to work in Django project.
In case You are using the VSC’s screen terminal, The error might be due to the fact that you already runserver in some other shell.
Just click on the dropbox on the left of the + sign in the header of the terminal of VSC and select some other shell and check if the server is already running there. Quit that server and you are ready to launch a another server.
Click the arrow in the screenshot and find the bash with already running Django server. You were getting the message because your server was already running and you tried to start the server again.
Dont use CTRL + Z to stop server, use CTRL + C to stop the server, I had also had the same problem in my linux (fedora) , I used to stop the server using CTRL + Z and again I used to kill the server using sudo fuser -k 8000/tcp command, which worked fine. But later when I started using CTRL + C , I didnot get that port running issue anymore.
- In terminal, Type
ps aux | grep runserver - Hit Enter
- Use PID among the result execute
kill -9 <PID>
For an instance, If result of step 1 is as follow
root 1041 0.0 0.1 266912 34580 pts/3 S+ 11:31 0:01 python3 manage.py runserver 0.0.0.0:3030
root 1696 4.5 0.1 126128 40708 ? S Feb14 925:43 /usr/local/bin/python manage.py runserver 0.0.0.0:8000
1041 and 1696 are PIDs. We need to choose whichever process we want to kill among them.
I was trying all the solutions but they were not working i suggest you to keep press the power button or if your battery is removeable then remove it all the process will be killed and your local host will be reset