Ruby on Rails Application and Mongrel Failing to Start

Question

Hi Group,

I have a Ruby on Rails (Rails v2.0.2) application which I have developed using Netbeans 6.1 on Mac OS X.

When I tried to run this application this evening (it was working fine this morning) I get the error:

'could not connect to the web server - cannot show http://localhost:3000'

When I try to run the application from terminal using: ./script/server

I get the following error:

=> Booting Mongrel (use 'script/server webrick' to force WEBrick) => Rails application starting on http://0.0.0.0:3000 => Call with -d to detach => Ctrl-C to shutdown server ** Starting Mongrel listening at 0.0.0.0:3000 ** Starting Rails with development environment... nil Exiting

Can anyone please help me resolve this issue.

Thanks in advance.

Kind Regards

Walter

Answer 1

I don't believe there is enough info here to correctly diagnose the issue.

You could try running it with debugging: ruby -d ./script/server. You will probably find an exception being raised shortly before it exits. With a bit of luck the exception will make sense to you.

If that fails, try and narrow the problem scope by running a simple task (rake -T or ./script/runner 'puts "OK"').

Worst case, try starting it up with a full debugger and set a breakpoint on NilClass#to_str / #to_s. That pesky nil in your output is the only clue I can see.