Why can't I start my gunicorn server? "Connection in use"

Turns out I just needed to sudo kill 3231 and sudo kill 7014. I incorrectly thought they first needed to brought to the foreground. The fact that the processes couldn't be seen until I used the capital A option (ps -A) mislead me, that they were somehow special.

The server was running (in the foreground) when I went to sleep before my wife. She turned off the computer before going to bed.

Ubuntu and gunicorn Newbie. Could you tell?

I have gotten used to run killall gunicorn before (re)starting Gunicorn in my local development environment.