Im running a Merb project base on Nginx + Passenger, when the application got error, it will raise 502 Bad Gateway page. so we want to customize the error page. so we add these to the configuration file:

http{
server{
....
error_page 500 502 503 504 /500.html;
location = /500.html {
root /home/some_dir/;
}
....
}
]

but it couldn't work, I google a lot, but couldn't get correct solution, am I miss sth?

thanks