Spork on JRuby on Windows
Apply this patch to Spork and this fix problem with child processes
cucumber on jruby
Configure gems
Add to Gemfile
"gem ‘gherkin’, :platform => :jruby" (with out quotes) just before cucumber gem
Precompile rails assets on jruby
Configure gems
Add to Gemfile
"gem 'therubyrhino', :platform => :jruby" (without quotes)