Bad gateway error from nginx

[Basil Kurian]

Hi

I configured Nginx to serve as a reverse proxy for Apache. Sometimes
Nginx is giving bad gateway error.

This is how nginx configuration is done

server {
 client_max_body_size 20M;
 listen  80;
 server_name  sq-fe1.example.com;
 access_log  /var/log/nginx/proxy.access.log;
 error_log /var/log/nginx/proxy.error.log;

 location / {
   limit_conn   one  100;
   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_pass http://127.0.0.1:8080;
proxy_buffers 8 16k;
proxy_buffer_size 32k;

 }
}

--
Regards

Basil Kurian