我有一段时间遇到这个问题，但没有找到解决办法。我正在rails中构建论坛应用程序。我刚刚完成为我的项目添加bootstrap和bootstrap gem。我去运行服务器，它出现了一个巨大的错误。这里是。
Julies-MacBook-Air:railsnew juliechopourian$ rails server
=> Booting Puma
=> Rails 5.0.0.1 application starting in development on http://localhost:3000
=> Run rails server -h for more startup options
Puma starting in single mode...
* Version 3.6.0 (ruby 2.3.1-p112), codename: Sleepy Sunday Serenity
* Min threads: 5, max threads: 5
* Environment: development
* Listening on tcp://localhost:3000
Exiting
/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:266:in initialize'：地址已在使用中 - bind（2）表示“:: 1”端口3000（Errno :: EADDRINUSE）
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:266:in new'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:266:in add_tcp_listener “
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:260:in block in add_tcp_listener'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:259:in “
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:259:in add_tcp_listener'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:102:in块解析'
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:85:in each'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/binder.rb:85:in解析“
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/runner.rb:133:in load_and_bind'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/single.rb:85:in运行“
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/puma/launcher.rb:172:in run'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/puma-3.6.0/lib/rack/handler/puma.rb:51:in运行“
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-2.0.1/lib/rack/server.rb:296:in start'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/server.rb:79:in开始“
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:90:in {{1} }点击”
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in {{1} } run_command！”
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands.rb:18:in block in server'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:85:in要求“
来自/ Users / juliechopourian / treehouse / rails_app / railsnew / bin / rails：9：in server'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/railties-5.0.0.1/lib/rails/commands/commands_tasks.rb:49:in load'
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in {{1} }呼叫'
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.7.2/lib/spring/client.rb:30:in <top (required)>'
from /Users/juliechopourian/treehouse/rails_app/railsnew/bin/rails:9:in'
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in <top (required)>'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in'
来自/Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/2.3.0/rubygems/core_ext/kernel_require.rb:55:in call'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.7.2/lib/spring/client/command.rb:7:in require'
来自/ Users / juliechopourian / treehouse / rails_app / railsnew / bin / spring：13：in run'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.7.2/bin/spring:49:in load'
来自bin / rails：3：load'
from /Users/juliechopourian/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in
我认为它可能与美洲狮宝石有关，但我真的不知道。任何帮助将非常感激。告诉我是否需要发布我的项目。
答案 0 :(得分：3)
rails 5
ps aux | grep 3000
如果rails app仍在运行
用户3454 0.6 5.6 1708124 220676 pts / 5 Sl + 20:18 0:20 puma 3.6.0（tcp：// localhost：3000）
kill -9 3454
或
rails s -p 3001
答案 1 :(得分：1)
观看此Address already in use - bind(2) for "::1" port 3000 (Errno::EADDRINUSE)
有些东西已经在端口3000上侦听了。请确保没有其他ruby进程正在侦听该端口。像
这样的东西ps aux | grep ruby