Nginx + Rails (Thin Server) - Double Bad Gateway Problem

[djlebersilvestre]

Thanks Maxim,

I've discovered that the configuration in rails systemintegration /
production environment was different from development. 
So, if someone called a URL that wasn't routable, the server responded
empty response instead of sending a 404.
When I switched the config, the server started to send 404 and Nginx
worked correctly.

# config/environments/production.rb
# Show exception templates (must be on to launch 404 when invalid route
is called)
config.action_dispatch.show_exceptions = true

Daniel Silvestre

Posted at Nginx Forum: http://forum.nginx.org/read.php?2,224548,224617#msg-224617