title: nginx codeigniter 502 bad gateway
body: <p>The config of nginx is as follows:</p>
  
  <pre><code>server {
          listen       80;
          server_name  www.example.com;
  
          root   /home/wwwroot/example.com;
          index index.php  index.html index.htm;
  
          location / {
                  index  index.php index.html index.htm;
          }
  
          location ~ \.php($|/) {
              fastcgi_pass   127.0.0.1:9000;
              fastcgi_index  index.php;
              fastcgi_split_path_info ^(.+\.php)(.*)$;
              fastcgi_param   PATH_INFO $fastcgi_path_info;
              fastcgi_param  SCRIPT_FILENAME  $document_root$fastcgi_script_name;
              include        fastcgi_params;
          }
  
          if (!-e $request_filename) {
              rewrite ^/(.*)$ /index.php/$1 last;
              break;
          }
  
          location ~ /\.ht {
                  deny  all;
          }
  }
  </code></pre>
  
  <p>please give me some advice, thank you~</p>