Bad gateway error from nginx

[Basil Kurian <basilkurian@gmail.com>]

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