Problem with nginx/Passenger

[Richard]

Hello Sinatra-fans,

This may be a nginx or passenger issue but I thought I'd see if anyone
here has seen this.

I have a sinatra web application that acts perfectly as-expected when
running directly via rack/thin.

However, I just installed nginx and passenger and it works but after
visiting some URLs and then going to other URLs and then returning, I
get:

"Sorry, the page is temporarily unavailable"

And there's no way to get the page again. This will slowly happen to
all URLs but I haven't been able to repeat it reliably. Note that this
is not the "Not Found" 404 page that shows up if I go to an invalid
URL.

Has anyone seen this or something similar? My guess is it's a caching
issue of some sort but no idea at this point.

Thanks!

[Richard]

Well it was a me error and not a nginx/Passenger OR a Sinatra error.

For others: Apparently this is the error you get in nginx when Sinatra
throws an exception so the page cannot be rendered.