Question

https://www.railstutorial.org/book/beginning#sec-rails_server

我已经达到了这一步，我正在使用cloud9环境。但是，当我按照该教程中的清单1.7运行服务器时，我收到此错误：

myname@rails-tutorial:~/workspace/hello_app $ rails server -p $PORT -b $IP
=> Booting WEBrick
=> Rails 4.2.0.beta2 application starting in development on http://0.0.0.0:8080
=> Run `rails server -h` for more startup options
=> Ctrl-C to shutdown server
[2014-10-30 21:44:22] INFO  WEBrick 1.3.1
[2014-10-30 21:44:22] INFO  ruby 2.1.1 (2014-02-24) [x86_64-linux]
Exiting /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/socket.rb:206:in `bind': Address already in use - bind(2) for 0.0.0.0:8080 (Errno::EADDRINUSE)
    from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/socket.rb:206:in `listen'
    from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/socket.rb:461:in `block in tcp_server_sockets'
    from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/socket.rb:232:in `each'
    from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/socket.rb:232:in `foreach'
    from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/socket.rb:459:in `tcp_server_sockets'
    from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/utils.rb:75:in `create_listeners'
    from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/server.rb:132:in `listen'
    from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/server.rb:113:in `initialize'
    from /usr/local/rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/webrick/httpserver.rb:45:in `initialize'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/rack-1.6.0.beta/lib/rack/handler/webrick.rb:32:in `new'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/rack-1.6.0.beta/lib/rack/handler/webrick.rb:32:in `run'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/rack-1.6.0.beta/lib/rack/server.rb:288:in `start'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/railties-4.2.0.beta2/lib/rails/commands/server.rb:80:in `start'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/railties-4.2.0.beta2/lib/rails/commands/commands_tasks.rb:80:in `block in server'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/railties-4.2.0.beta2/lib/rails/commands/commands_tasks.rb:75:in `tap'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/railties-4.2.0.beta2/lib/rails/commands/commands_tasks.rb:75:in `server'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/railties-4.2.0.beta2/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/railties-4.2.0.beta2/lib/rails/commands.rb:17:in `<top (required)>'
    from /home/ubuntu/workspace/hello_app/bin/rails:8:in `require'
    from /home/ubuntu/workspace/hello_app/bin/rails:8:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `load'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `call'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/spring-1.1.3/lib/spring/client.rb:26:in `run'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/spring-1.1.3/bin/spring:48:in `<top (required)>'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `load'
    from /usr/local/rvm/gems/ruby-2.1.1@rails4/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `<top (required)>'
    from /home/ubuntu/workspace/hello_app/bin/spring:16:in `require'
    from /home/ubuntu/workspace/hello_app/bin/spring:16:in `<top (required)>'
    from bin/rails:3:in `load'
    from bin/rails:3:in `<main>'

我已尝试指定其他端口，但这不起作用，cloud9环境向我建议我应该使用$ PORT变量。

错误＆＃34;地址已在使用 - bind（2）为0.0.0.0:8080（Errno :: EADDRINUSE）＆＃34;意味着我已经运行了一个rails服务器，但我不知道。我不确定该怎么做，教程没有提出任何解决此问题的方法。

Answer 1

我了解到你可以使用命令killall ruby来阻止任何帮助我的ruby进程，因为我错误地在本教程的rails server -b $IP -p $PORT级别运行了~/workspace命令。我在can't open rails server

中找到了答案

Answer 2

我最后再次从头开始教程并且工作正常，但是将来遇到此问题的任何人都可能会发现我从cloud9的支持团队获得的这种故障排除技术非常有用：

尝试：

lsof -i:8080

这会给占用它的应用程序。

如果是apache，请使用以下命令停止：

sudo /etc/init.d/apache2 stop

希望这个答案对有这个问题的人有用。

Answer 3

可能你只是让其他服务器仍在运行。您在之前使用rails server命令教程中启动的那个。您需要先使用Ctrl + C关闭另一个，然后再次尝试rails server -b $IP -p $PORT

Answer 4

$ rails server -b $IP -p $PORT

Cloud9使用特殊环境变量$ IP和$ PORT进行分配动态的IP地址和端口号。如果你想看到这些变量的值，在命令中键入echo $ IP或echo $ PORT 线。

如果等待几分钟（不超过2分钟），您的操作系统可能会释放端口。如果没有，请在每次运行rails server时使用超过5,000的随机端口号，例如

$ rails server -b $IP -p 6789

或者，因为您的IDE非常糟糕，您可以考虑使用其他IDE。

Rails教程第1章：rails服务器并不适用于Cloud9

4 个答案: