Spork and Guard EADDRINUSE - ruby-on-rails-3

Question

I'm building a rails app and using Spork/Guard/Rspec for testing.
I'm on a mac (10.6.8) -- here are the gems I'm using:
gem "rspec-rails", "~> 2.12.1"
gem "guard-rspec", "~> 2.3.3"
gem "guard-spork", "~> 1.4.1"
gem "spork", "~> 0.9.2"
gem 'rb-fsevent', '~> 0.9.1', :require => false
gem "growl", "~> 1.0.3"
gem 'capybara', '1.1.2'
When I edit my routes file it should restart the spork server here's the line in my Guardfile:
guard 'spork', :rspec_env => { 'RAILS_ENV' => 'test' }, :foreman => true do
watch('config/routes.rb')
end
But recently I just started getting the following error when I add a new route:
Loading Spork.prefork block...
Rack::File headers parameter replaces cache_control after Rack 1.5.
Address already in use - bind(2) (Errno::EADDRINUSE)
/Users/cyrus/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/drb/drb.rb:861:in `initialize'
/Users/cyrus/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/drb/drb.rb:861:in `open'
/Users/cyrus/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/drb/drb.rb:861:in `open_server'
/Users/cyrus/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/drb/drb.rb:759:in `block in open_server'
/Users/cyrus/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/drb/drb.rb:757:in `each'
/Users/cyrus/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/drb/drb.rb:757:in `open_server'
/Users/cyrus/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/drb/drb.rb:1342:in `initialize'
/Users/cyrus/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/drb/drb.rb:1624:in `new'
/Users/cyrus/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/1.9.1/drb/drb.rb:1624:in `start_service'
/Users/cyrus/.rvm/gems/ruby-1.9.3-p125#h/gems/spork-0.9.2/lib/spork/server.rb:29:in `listen'
/Users/cyrus/.rvm/gems/ruby-1.9.3-p125#h/gems/spork-0.9.2/lib/spork/server.rb:20:in `run'
/Users/cyrus/.rvm/gems/ruby-1.9.3-p125#h/gems/spork-0.9.2/lib/spork/runner.rb:75:in `run'
/Users/cyrus/.rvm/gems/ruby-1.9.3-p125#h/gems/spork-0.9.2/lib/spork/runner.rb:10:in `run'
/Users/cyrus/.rvm/gems/ruby-1.9.3-p125#h/gems/spork-0.9.2/bin/spork:10:in `<top (required)>'
/Users/cyrus/.rvm/gems/ruby-1.9.3-p125#h/bin/spork:23:in `load'
/Users/cyrus/.rvm/gems/ruby-1.9.3-p125#h/bin/spork:23:in `<main>'
Usually when spork boots up I get the following:
Loading Spork.prefork block...
Rack::File headers parameter replaces cache_control after Rack 1.5.
Spork is ready and listening on 8989!
How do I avoid this error?

Answer 1

I came here suffering the same problem as the OP.
After going down the rabbit hole of the 'error is a bug' post, and examining the line of code where the failure occurred, I rebooted out of frustration. I realized after doing this that the lock on the port likely came from the fact that I had logged out of the previous desktop session, and that the Spork DRb server hangs RubyMine on closing, so maybe that is what leaves the port open.
Sure enough, I could now start the Spork server.
I add this so other people facing this problem can consider if it matches their situation.

Answer 2

By removing the :foreman => true in the Guardfile I was able to get rid of this problem. Right now I'm not making meaningful use of the values in my .env file in my tests so that should be fine, but I'm submitting an issue on Github.

Answer 3

Looks like this error is a bug: https://github.com/rails/rails/pull/8812