Django+gunicorn+nginx upload large file 502 error

I run my gunicorn with that parameters, try :

python manage.py run_gunicorn --workers=3 --worker-class=tornado  --timeout=90 --graceful-timeout=10 --log-level=DEBUG --bind 127.0.0.1:8151 --debug

or if you run differently, you may run with that options

For large files handling you should use a worker-class. Also I had some trouble using gevent in python 3.7, better to use 3.6.

Django, Python 3.6 example:

Install:

pip install gevent

Run

gunicorn --chdir myApp myApp.wsgi --workers 4 --worker-class=gevent --bind 0.0.0.0:80 --timeout=90 --graceful-timeout=10