Question

UWSGI made response but NGINX return empty response.

My other api endpoints are working fine but only a file upload specific api endpoint is not working.

i’m using Flask for API development, along with nginx and uwsgi.

UWSGI LOG

[pid: 107416|app: 0|req: 1/2] 106.78.35.202 () {44 vars in 886 bytes} [Tue Mar  2 05:54:26 2021] POST /api/file_upload => generated 296 bytes in 5876 msecs (HTTP/1.1 200) 3 headers in 104 bytes (4 switches on core 0)

NGINX LOG

2021/03/02 05:59:32 [error] 107686#107686: *2 upstream timed out (110: Connection timed out) while reading upstream, client: ***.**.**.***, server: ***.***.**.***, request: "POST /api/file_upload HTTP/1.1", upstream: "uwsgi://unix:/var/www/vocal/vocal.sock:", host: "***.***.**.***"

Nginx config file.

server {
	
	listen 80;
	server_name ***.***.**.***;

	root /var/www/vocal/;
	access_log              /var/log/nginx/vocal_access.log;
	error_log               /var/log/nginx/vocal_error_log;

	uwsgi_read_timeout      300s;
	uwsgi_send_timeout      300s;
	proxy_read_timeout 	300s;


    location / {

        include 		uwsgi_params;
        uwsgi_pass 		unix:/var/www/vocal/vocal.sock;		

	client_max_body_size    15M;
       # proxy_pass		unix:/var/www/vocal/vocal.sock;
	proxy_redirect     	off;
        proxy_set_header   	Host $host;
        proxy_set_header  	X-Real-IP $remote_addr;
        proxy_set_header   	X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header   	X-Forwarded-Host $server_name;
	proxy_read_timeout 	300;
    }

    location /output {
        autoindex on;
        alias 			/var/www/vocal/output/;
	sendfile           	on;
	#sendfile_max_chunk 	15m;
	proxy_read_timeout      300;
    }

    location /upload {
        autoindex on;
        alias 			/var/www/vocal/app/main/file_upload/upload/;
	sendfile           	on;
        #sendfile_max_chunk 	15m;
	proxy_read_timeout      300;
    }

}

uwsgi file config.

[uwsgi]
module = wsgi:application

master = true
processes = 10

socket = vocal.sock
#socket = 127.0.0.1:5000
chmod-socket = 660
vacuum = true

die-on-term = true

logto = /var/log/uwsgi/%n.log

#protocol = uwsgi
harakiri = 120

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Hi there,

As far as I can see the backend service is handling the request for around 6 seconds or so, however, the proxy_read_timeout inside your location / is set to 300 without an s at the end which I believe defaults to milliseconds.

I could suggest either changing it to 3600 for example or adding an s: 300s.

Let me know how it goes! Regards, Bobby