Rails 3 服务器在启动时崩溃：“不是套接字文件描述符”

Question

我正在尝试开始使用 Ruby on Rails，在我尝试启动服务器之前一切都进展顺利。我收到以下错误：

C:\Users\Ken\workspace\railsHello>rails server
=> Booting WEBrick
=> Rails 3.0.5 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
[2011-03-10 19:53:08] INFO  WEBrick 1.3.1
[2011-03-10 19:53:08] INFO  ruby 1.9.2 (2011-02-18) [i386-mingw32]
[2011-03-10 19:53:09] WARN  TCPServer Error: not a socket file descriptor
Exiting
C:/Ruby192/lib/ruby/1.9.1/webrick/utils.rb:73:in `initialize': not a socket file
 descriptor (ArgumentError)
        from C:/Ruby192/lib/ruby/1.9.1/webrick/utils.rb:73:in `new'
        from C:/Ruby192/lib/ruby/1.9.1/webrick/utils.rb:73:in `block in create_l
isteners'
        from C:/Ruby192/lib/ruby/1.9.1/webrick/utils.rb:70:in `each'
        from C:/Ruby192/lib/ruby/1.9.1/webrick/utils.rb:70:in `create_listeners'

        from C:/Ruby192/lib/ruby/1.9.1/webrick/server.rb:74:in `listen'
        from C:/Ruby192/lib/ruby/1.9.1/webrick/server.rb:62:in `initialize'
        from C:/Ruby192/lib/ruby/1.9.1/webrick/httpserver.rb:24:in `initialize'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/handler/web
rick.rb:10:in `new'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/handler/web
rick.rb:10:in `run'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/rack-1.2.1/lib/rack/server.rb:2
13:in `start'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.5/lib/rails/comman
ds/server.rb:65:in `start'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.5/lib/rails/comman
ds.rb:30:in `block in <top (required)>'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.5/lib/rails/comman
ds.rb:27:in `tap'
        from C:/Ruby192/lib/ruby/gems/1.9.1/gems/railties-3.0.5/lib/rails/comman
ds.rb:27:in `<top (required)>'
        from script/rails:6:in `require'
        from script/rails:6:in `<main>'

C:\Users\Ken\workspace\railsHello>

我什至不知道从哪里开始“TCPServer 错误：不是套接字文件描述符”。

通过 Aptana 尝试也没有帮助。

我使用的是 Windows 7 家庭高级版。 Apache已经安装了，但是我把它关掉了，也没有什么区别。

预先感谢您的帮助！

-肯

Answer 1

您确定没有其他东西正在侦听端口 3000（可能是未关闭的服务器的旧实例）？检查以下内容：

netstat -a -b

如果有，只需终止该应用程序，或在另一个端口上启动 WEBrick；例如，要在端口 8000 上启动它：

rails server --port=8000