With regards to nginx error log, what does 2020/10/23 06:51:45 [notice] 361#361: signal process started mean?
Some more context:
I have some raspberry pi's communicating with my Django application on a digital ocean Ubuntu droplet running nginx as the web server. These raspberry pi's stopped communicating with my server and they are physically very far from me. I can see their last communication with my server was at 2020/10/23 06:51:41 then they stopped (seconds before nginx error message was logged). A user that has access to the pi's said they did not lose power, internet is working, so they did a reboot, still nothing.
I have tried:
sudo systemctl restart nginx followed by sudo systemctl restart gunicorn
This did not resolve the issue. I can't seem to find the documentation on this error