How to stop celery worker process

Question

I have a Django project on an Ubuntu EC2 node, which I have been using to set up an asynchronous using Celery.

I am following this along with the docs.

I've been able to get a basic task working at the command line, using:

(env1)ubuntu@ip-172-31-22-65:~/projects/tp$ celery --app=myproject.celery:app worker --loglevel=INFO

To start a worker. I have since made some changes to the Python, but realized that I need to restart a worker.

From the command line, I've tried:

 ps auxww | grep 'celery worker' | awk '{print $2}' | xargs kill -9

But I can see that the worker is still running.

How can I kill it?

edit:

(env1)ubuntu@ip-172-31-22-65:~/projects/tp$ sudo ps auxww | grep celeryd | grep -v "grep" | awk '{print $2}' | sudo xargs kill -HUP
kill: invalid argument H

Usage:
 kill [options] <pid> [...]

Options:
 <pid> [...]            send signal to every <pid> listed
 -<signal>, -s, --signal <signal>
                        specify the <signal> to be sent
 -l, --list=[<signal>]  list all signal names, or convert one to a name
 -L, --table            list all signal names in a nice table

 -h, --help     display this help and exit
 -V, --version  output version information and exit

For more details see kill(1).

edit 2:

(env1)ubuntu@ip-172-31-22-65:~/projects/tp$ ps aux|grep celery
ubuntu    9756  0.0  3.4 100868 35508 pts/6    S+   15:49   0:07 /home/ubuntu/.virtualenvs/env1/bin/python3.4 /home/ubuntu/.virtualenvs/env1/bin/celery --app=tp.celery:app worker --loglevel=INFO
ubuntu    9760  0.0  3.9 255840 39852 pts/6    S+   15:49   0:05 /home/ubuntu/.virtualenvs/env1/bin/python3.4 /home/ubuntu/.virtualenvs/env1/bin/celery --app=tp.celery:app worker --loglevel=INFO
ubuntu   12760  0.0  0.0  10464   932 pts/7    S+   19:04   0:00 grep --color=auto celery

Answer 1

Try this in terminal

ps aux|grep 'celery worker'

You will see like this

username  29042  0.0  0.6  23216 14356 pts/1    S+   00:18   0:01 /bin/celery worker ...

Then kill process id by

sudo kill -9 process_id # here 29042

If you have multiple processes, then you have to kill all process id using above kill commmand

sudo kill -9 id1 id2 id3 ...

From the celery doc

ps auxww | grep 'celery worker' | awk '{print $2}' | xargs kill -9

OR if you are running celeryd

ps auxww | grep celeryd | awk '{print $2}' | xargs kill -9

Note

If you are running celery in supervisor, even though kill the process, it automatically restarts(if autorestart=True in supervisor script).