Can't run Rails server

Question

I have a problem when i try to run the server using rails s

I'm using Windows, and this is the return:

C:\Blog\MyBlog>rails s
=> Booting WEBrick
=> Rails 3.2.12 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
Exiting
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/server.rb:353:in `kill': Invalid argument (Errno::EINVAL)
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/server.rb:353:in `pidfile_process_status'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/server.rb:340:in `check_pid!'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.5.2/lib/rack/server.rb:246:in `start'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.12/lib/rails/commands/server.rb:70:in `start'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.12/lib/rails/commands.rb:55:in `block in <top (required)>'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.12/lib/rails/commands.rb:50:in `tap'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.12/lib/rails/commands.rb:50:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'

C:\Blog\MyBlog>

My gemfile:

source ' https://rubygems.org '

 gem 'rails', '3.2.12' # Bundle edge Rails instead: # gem 'rails', :git => 'git://github.com/rails/rails.git' gem 'sqlite3' # Gems used only for assets and not required # in production environments by default. group :assets do gem 'sass-rails', '~> 3.2.3' gem 'coffee-rails', '~> 3.2.1' # See https://github.com/sstephenson/execjs#readme for more supported runtimes # gem 'therubyracer', :platforms => :ruby gem 'uglifier', '>= 1.0.3' end gem 'jquery-rails' # To use ActiveModel has_secure_password # gem 'bcrypt-ruby', '~> 3.0.0' # To use Jbuilder templates for JSON # gem 'jbuilder' # Use unicorn as the app server # gem 'unicorn' # Deploy with Capistrano # gem 'capistrano' # To use debugger # gem 'debugger' 

ruby 1.9.3p392 (2013-02-22) [i386-mingw32], Rails 3.2.12 , Gem 1.8.25

Sorry for my english people

EDITED

I try using mongrel but i get the next in the cmd:

C:\Blog\MyBlog>rails s mongrel
Exiting
C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/handler/mongrel.rb:1:in
`require': cannot load such file -- mongrel (LoadError)
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/handler/mon
grel.rb:1:in `<top (required)>'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/handler.rb:
20:in `const_get'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/handler.rb:
20:in `block in get'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/handler.rb:
20:in `each'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/handler.rb:
20:in `inject'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/handler.rb:
20:in `get'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/rack-1.4.5/lib/rack/server.rb:2
72:in `server'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.12/lib/rails/comma
nds/server.rb:59:in `start'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.12/lib/rails/comma
nds.rb:55:in `block in <top (required)>'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.12/lib/rails/comma
nds.rb:50:in `tap'
        from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.12/lib/rails/comma
nds.rb:50:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'

Answer 1

尝试在tmp / pids / server.pid文件中添加一个随机编号（例如6532），然后启动webricks

Answer 2

Windows and Rails doesn't work usually as well as in other environments. Best workaround Webbrick problems in Windows with Rails is to install another server for development. Mongrel is a good alternative. To install it:

gem install mongrel

And then to start the server

rails s mongrel

Answer 3

I encountered the same problem. I discovered the easiest fix is actually just to delete the existing pid file in the application folder:

del tmp\pids\*.*

Found this solution referring to this resource: [ https://github.com/rack/rack/issues/544][1]