【nginx 错误】Upstream prematurely closed connection while reading upstream

nginx.conf

Had a similar problem with my reverse proxy.
This is the configuration that finally did it for me:
location / {
proxy_http_version 1.1;
proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";
proxy_set_header Host $http_host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forward-For $proxy_add_x_forwarded_for;
proxy_set_header X-Forward-Proto http;
proxy_set_header X-Nginx-Proxy true;
proxy_temp_file_write_size 64k;
proxy_connect_timeout 10080s;
proxy_send_timeout 10080;
proxy_read_timeout 10080;
proxy_buffer_size 64k;
proxy_buffers 16 32k;
proxy_busy_buffers_size 64k;
proxy_redirect off;
proxy_request_buffering off;
proxy_buffering off;
proxy_pass http://192.168.1.201:9100/;
}







# my nginx.conf

worker_processes auto;

events {
  worker_connections 1024;
  use epoll;
  multi_accept on;
}

http {
  tcp_nodelay   on;
  include       /etc/nginx/mime.types;
  default_type  application/octet-stream;
  proxy_http_version 1.1;

  #server {
  #     listen        80;
  #     server_name    _;
  #     return        403;
  #}

  server {
    listen      80;
    server_name 120.78.165.24;
    charset     utf-8;
    client_max_body_size 75M;

    #location /static {
    #    alias /opt/www/static;
    #}

    location / {
      proxy_pass http://web:5000;
      proxy_read_timeout 10080;
      proxy_send_timeout 10080;
      proxy_connect_timeout 10080s;
      proxy_request_buffering off;
      proxy_buffering off;
      proxy_buffer_size 64k;
      proxy_buffers 16 32k;
      proxy_busy_buffers_size 64k;
      proxy_temp_file_write_size 64k;
    }
}
}