110: Connection timed out (Nginx/Gunicorn)

Question

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.

This is not an nginx timeout, but probably a Gunicorn timeout. Gunicorn defaults to a 30 second timeout.

In general, you should fix this by not having an endpoint that takes longer than 30 seconds to return, but if it is a seldom used endpoint, you can also just increase the gunicorn timeout.

If you do this, you should probably also increase the number of gunicorn worker processes as well.

To increase the timeout and workers for gunicorn, you can add the following command-line options on start:

gunicorn --timeout 120 --workers <NUMBER OF WORKER YOU WANT>

We had the same problem using Django+nginx+gunicorn. From Gunicorn documentation we have configured the graceful-timeout that made almost no difference.

After some testings, we found the solution, the parameter to configure is: timeout (And not graceful timeout). It works like a clock..

So, Do:

1) open the gunicorn configuration file

2) set the TIMEOUT to what ever you need - the value is in seconds

NUM_WORKERS=3
TIMEOUT=120

exec gunicorn ${DJANGO_WSGI_MODULE}:application \
--name $NAME \
--workers $NUM_WORKERS \
--timeout $TIMEOUT \
--log-level=debug \
--bind=127.0.0.1:9000 \
--pid=$PIDFILE