Upstream sent unsupported protocol version

Question

I am trying to setup symfony on nginx. Below are the configuration -

upstream phpfcgi {
        server 127.0.0.1:9000;
# server unix:/var/run/php5-fpm.sock; #for PHP-FPM running on UNIX socket
}
server{
  listen 80;
  server_name xxy.xxy.com;
  root /home/abcdef/website/current/web;
  location / {
  # try to serve file directly, fallback to rewrite
          try_files $uri @rewriteapp;
  }

  location @rewriteapp {
  # rewrite all to app.php
          rewrite ^(.*)$ /app.php/$1 last;
  }

  location ~ ^/(app|app_dev|config)\.php(/|$) {
          fastcgi_pass phpfcgi;
          fastcgi_split_path_info ^(.+\.php)(/.*)$;
          include fastcgi_params;
          fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
          fastcgi_param HTTPS off;
  }

  error_log /var/log/nginx/project_error.log;
  access_log /var/log/nginx/project_access.log;
}

I am getting this error

2013/12/12 11:23:55 [error] 25515#0: *5 upstream sent unsupported FastCGI protocol version: 60 while reading response header from upstream, client: 111.84.98.65, server: xxy.xxy.com, request: "GET / HTTP/1.1", upstream: "fastcgi://127.0.0.1:9000", host: "xxy.xxy.com"

Can somebody help me on this?

Answer 1

Check

netstat -tap

to see if another application is listening on port 9000. If so try to kill it

kill -l PID

or change the port in your nginx config. Your error often happens when the configured port is already in use.