ERROR (no such process) returned when I'm hit sudo supervisorctl status

Question

I had faced the same issue on Ubuntu 20.04 (web server: apache2).

Returned an error ": ERROR (no such process)"

Answer 1

There is no process running in your supervisor. If you have any scheduler or queue jobs then you can create a process in the supervisor.

1. to create a process for the supervisor

   sudo nano /etc/supervisor/conf.d/process_name.conf

you can change the process_name.conf to your process name.

2 . Enter the process roles in the opened window. here I'm listing an example

    [program:queue-worker]

    process_name=%(program_name)s_%(process_num)02d

    command= your process    
    autostart=true

    autorestart=true

    user=root

    numprocs=8

    redirect_stderr=true

    stdout_logfile=/var/www/path_to_project/storage/logs/notification_out.log
    stderr_logfile= /var/www/path_to_project/storage/logs/notification_err.log

There is to logs created by the supervisor stdout_logfile and stderr_logfile to monitor your process

and you can change the program queue-worker to any process name

3. Enter the command to reread supervisor.

   sudo supervisorctl reread

4. Enter the command to update the supervisor.

   sudo supervisorctl update

5. Enter the command to start the supervisor.

   sudo supervisorctl start:queue-worker

the queue-worker is your program name

here is the detailed doc.

https://www.digitalocean.com/community/tutorials/how-to-install-and-manage-supervisor-on-ubuntu-and-debian-vps