Ruby on Rails 服务器未启动答案

【问题标题】：Ruby on Rails server isn't startingRuby on Rails 服务器未启动
【发布时间】：2017-01-23 03:49:10
【问题描述】：

我一直在尝试使用命令 rails server 运行我的 Rails 应用程序但最近出现了这个错误：

Macs-MacBook-Pro:jobsboard mac$ rails server => 引导彪马 => Rails 5.0.0.1 应用程序在http://localhost:3000 开始开发 => 运行rails server -h 以获取更多启动选项 Puma 以单一模式启动... * 版本 3.6.0 (ruby 2.3.0-p0)，代号：Sleepy Sunday Serenity * 最小线程：5，最大线程：5 * 环境：发展 * 监听 tcp://localhost:3000 退出 /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:266:in initialize': Address already in use - bind(2) for "::1" port 3000 (Errno::EADDRINUSE) from /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:266:innew' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:266:in add_tcp_listener' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:260:inblock in add_tcp_listener' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:259:in each' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:259:inadd_tcp_listener' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:102:in block in parse' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:85:ineach' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:85:in parse' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/runner.rb:133:inload_and_bind' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/single.rb:85:in run' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/puma/launcher.rb:172:inrun' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/puma-3.6.0/lib/rack/handler/puma.rb:51:in run' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/rack-2.0.1/lib/rack/server.rb:296:instart' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/server.rb:79:in start' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:90:inblock in server' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in tap' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:inserver' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in run_command!' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in' 来自 /Users/mac/Documents/Projects /网络开发/Ruby On Rails/工作板/jobsboard/bin/rails:9:in require' from /Users/mac/Documents/Projects/Web Development/Ruby On Rails/Jobs Board/jobsboard/bin/rails:9:in' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in load' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:incall' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/command.rb:7:in call' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client.rb:30:inrun' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/bin/spring:49:in <top (required)>' from /Users/mac/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:inload' 来自 /Users/mac/.rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in <top (required)>' from /Users/mac/Documents/Projects/Web Development/Ruby On Rails/Jobs Board/jobsboard/bin/spring:13:inrequire' 来自 /Users/mac/Documents/Projects/Web Development/Ruby On Rails/Jobsboard/jobsboard/bin/spring:13:in <top (required)>' from bin/rails:3:inload' from bin/rails:3:in `'

我可以通过指定不同的端口来解决这个问题 - 即使用命令 '

rails 服务器 -p 4000

'，但我想使用我以前的部署方式。我该如何解决？

附：我是 Rails 的新手，所以请给出简单的说明。 :p 非常感谢大家！谢谢！

加法：

上次登录时间：9 月 15 日星期四 13:55:52 在 ttys000 Macs-MacBook-Pro:Ruby On Rails mac$ ps aux | grep 导轨 mac 1040 0.0 0.0 2445080 800 s003 S+ 2:02PM 0:00.00 grep rails mac
1020 0.0 0.0 2471272 3052 s000 S+ 2:02PM 0:00.01 /Users/mac/.rvm/gems/ruby-2.3.0/gems/rb-fsevent-0.9.7/bin/fsevent_watch --latency 0.1 /Users/mac/.rvm/gems/ruby-2.3.0/gems/jquery-rails-4.2.1 mac 1019 0.0 0.0 2462056 3032 s000 S+ 2:02PM
0:00.01 /Users/mac/.rvm/gems/ruby-2.3.0/gems/rb-fsevent-0.9.7/bin/fsevent_watch --latency 0.1 /Users/mac/.rvm/gems/ruby-2.3.0/gems/coffee-rails-4.2.1 Macs-MacBook-Pro:Ruby On Rails mac$

【问题讨论】：

标签： ruby-on-rails server localhost

【解决方案1】：

打开终端或 iTerm 并假设您已经在项目目录中。

检查 PID 进程

lsof -wni tcp:3000

如果它们存在，则杀死进程，在终端上输入这个

kill -9 PID

【讨论】：

【解决方案2】：

“您是否尝试过将其关闭再打开？”

您的应用的某个版本可能已在后台运行。看看活动监视器，看看你是否能看到它，或者如果你对你的终端功能有信心，你可以试试

ps aux | grep rails

然后看看它是否出现在那里。然后使用带有进程 ID 的kill xxxx 来结束它，这应该会再次为您释放端口 3000

【讨论】：

【解决方案3】：

表示 3000 端口不是空闲的。您项目的另一个实例已经在使用它。所以，通过以下命令找到它的进程：

lsof -i :3000

并通过以下方式终止该进程：

kill -9 processid

您还可以从应用程序的临时文件夹中删除进程 ID。
或者，您可以通过命令rails s -p 3001在其他端口上启动应用程序

【讨论】：