110: Connection timed out (Nginx/Gunicorn)

You could try upgrading the timeout for your proxy pass in Nginx by adding:

proxy_connect_timeout 75s;
proxy_read_timeout 300s;

on /var/nginx/sites-available/[site-config] or /var/nginx/nginx.conf if you want to increase the timeout limite on all sites served by nginx.

You must add --timeout 300 as well to your gunicorn process/config.

This solved my problems in the past with bigger uploads.

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