=> Booting WEBrick...
/Users/headius/NetBeansProjects/jruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27: uninitialized class variable @@allow_concurrency in ActiveRecord::Base (NameError)
        from /Users/headius/NetBeansProjects/jruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27
        from /Users/headius/NetBeansProjects/jruby/lib/ruby/site_ruby/1.8/rubygems/custom_require.rb:27