I'm getting occasional 502 bad gateway errors with nginx and uwsgi. Inspecting my uwsgi log file I occasionally see
uwsgi_proto_uwsgi_parser(): Error 0 [proto/uwsgi.c line 35]
I did a load test and I received 285 succesfull requests and 4 bad ones. The above line appeared exactly 4 times in that file so its definitely that error that is causing the problem.
I didn't find anything online about that specific error. Anyone have any suggestions?
I don't get this error just under load as it sometimes happens when I'm just testing my app myself making one request at a time.
This is how I'm starting uwsgi
uwsgi-3.3 --socket /tmp/uwsgi.sock --wsgi-file RunOperation.py --master --processes 4 --threads 2 --stats 127.0.0.1:9191 --daemonize /root/uwsgi/log.log --pidfile /root/uwsgi/pidfile.txt --vacuum
And this is the relevant part of my nginx config
uwsgi_pass unix:///tmp/uwsgi.sock;
uwsgi_param QUERY_STRING $query_string;
uwsgi_param REQUEST_METHOD $request_method;
uwsgi_param CONTENT_TYPE $content_type;
uwsgi_param CONTENT_LENGTH $content_length;
uwsgi_param REQUEST_URI $request_uri;
uwsgi_param PATH_INFO $document_uri;
uwsgi_param DOCUMENT_ROOT $document_root;
uwsgi_param SERVER_PROTOCOL $server_protocol;
uwsgi_param HTTPS $https if_not_empty;
uwsgi_param REMOTE_ADDR $remote_addr;
uwsgi_param REMOTE_PORT $remote_port;
uwsgi_param SERVER_PORT $server_port;
uwsgi_param SERVER_NAME $server_name;
Thanks.