瘦 Web 服务器：“start_tcp_server”：git 分支结帐后没有接受器（运行时错误）
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Thin web server: `start_tcp_server': no acceptor (RuntimeError) after git branch checkout
提问by maeseele
A Rails 3.2.0 app, working fine with Thin web server, both locally and on Heroku cedar stack.
一个 Rails 3.2.0 应用程序，可以在本地和 Heroku cedar 堆栈上与 Thin Web 服务器一起正常工作。
After:
后：
$ git branch work
$ git checkout work
$ rails server
I get:
我得到：
=> Booting Thin
=> Rails 3.2.0 application starting in development on http://0.0.0.0:3000
=> Call with -d to detach
=> Ctrl-C to shutdown server
>> Thin web server (v1.3.1 codename Triple Espresso)
>> Maximum connections set to 1024
>> Listening on 0.0.0.0:3000, CTRL+C to stop
Exiting
/Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/eventmachine-0.12.10/lib/eventmachine.rb:572:in `start_tcp_server': no acceptor (RuntimeError)
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/eventmachine-0.12.10/lib/eventmachine.rb:572:in `start_server'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/thin-1.3.1/lib/thin/backends/tcp_server.rb:16:in `connect'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/thin-1.3.1/lib/thin/backends/base.rb:53:in `block in start'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `call'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run_machine'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/eventmachine-0.12.10/lib/eventmachine.rb:256:in `run'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/thin-1.3.1/lib/thin/backends/base.rb:61:in `start'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/thin-1.3.1/lib/thin/server.rb:159:in `start'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/rack-1.4.1/lib/rack/handler/thin.rb:13:in `run'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/rack-1.4.1/lib/rack/server.rb:265:in `start'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/railties-3.2.0/lib/rails/commands/server.rb:70:in `start'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/railties-3.2.0/lib/rails/commands.rb:55:in `block in <top (required)>'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/railties-3.2.0/lib/rails/commands.rb:50:in `tap'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/gems/railties-3.2.0/lib/rails/commands.rb:50:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
Also, when I do:
另外，当我这样做时：
sudo bundle exec rails server thin -p 3000
I get:
我得到：
/Users/peter/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:247:in `to_specs': Could not find bundler (>= 0) amongst [bigdecimal-1.1.0, io-console-0.3, json-1.5.4, minitest-2.5.1, rake-0.9.2.2, rdoc-3.9.4] (Gem::LoadError)
from /Users/peter/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems/dependency.rb:256:in `to_spec'
from /Users/peter/.rvm/rubies/ruby-1.9.3-p125/lib/ruby/site_ruby/1.9.1/rubygems.rb:1210:in `gem'
from /Users/peter/.rvm/gems/ruby-1.9.3-p125/bin/bundle:18:in `<main>'
I have bundler 1.0.22 installed. Updated and installed it. Nothing seems to work. Any ideas?
我安装了 bundler 1.0.22。更新并安装了它。似乎没有任何效果。有任何想法吗？
回答by Arta
This works for me. Find (zombie?) server (can happen when quitting terminal with server running):
这对我有用。查找（僵尸？）服务器（在服务器运行的情况下退出终端时可能会发生）：
$ ps ax | grep rails
If it returns something like:
如果它返回如下内容：
33467 s002 S+ 0:00.00 grep rails
33240 s003 S+ 0:15.05 /Users/Arta/.rbenv/versions/1.9.2-p290/bin/ruby script/rails s -p 3000
kill it, and run anew:
杀死它，然后重新运行：
$ kill -9 33240
$ rails s
回答by TuteC
The port 3000 may already be in use. Look at http://mrjaba.posterous.com/starttcpserver-no-acceptor-runtimeerror
端口 3000 可能已在使用中。看http://mrjaba.posterous.com/starttcpserver-no-acceptor-runtimeerror
回答by Alborz
pgrep rubyto see what servers are running and then
pgrep ruby查看正在运行的服务器，然后
kill -9 serverNumber
;)
;)
回答by Joshua Muheim
If there's any other process locking the port, you can find out which PID it has like this:
如果有任何其他进程锁定端口，您可以像这样找出它有哪个 PID：
$ lsof -i :3000
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
Passenger 40466 josh 5u IPv4 0x7cae9332073ed4df 0t0 TCP *:hbci (LISTEN)
Passenger 40467 josh 5u IPv4 0x7cae9332073ed4df 0t0 TCP *:hbci (LISTEN)
Then simply kill it/them:
然后简单地杀死它/他们：
$ kill -9 40466
$ kill -9 40467
回答by wantrapreneur
rvmsudo rails server thin -p 3000
rvmsudo rails server 瘦 -p 3000
Does it for me
对我有用吗
回答by ExiRe
I has this error because i was running rails-dev-boxwith Rails inside of it.
我有这个错误，因为我正在运行带有 Rails 的rails-dev-box。
Port 3000 in the host computer is forwarded to port 3000 in the virtual machine.
Thus, applications running in the virtual machine can be accessed via
localhost:3000 in the host computer.
So is logged out from Vagrant and shutted down it:
所以从 Vagrant 注销并关闭它：
vagrant@rails-dev-box:/vagrant/rails$ exit
$ vagrant halt
That helped me.
那帮助了我。
回答by aarona
I had this error because I was already running rails in another terminal. Closing my other project fixed this.
我有这个错误，因为我已经在另一个终端中运行了 rails。关闭我的另一个项目解决了这个问题。
回答by Sam
Execute this in the terminal
在终端执行这个
sudo netstat -lpn |grep rails
And then
进而
sudo kill <job id>
回答by pepe
I ran into a similar issue after getting back to the office from vacation. I run my server on the local IP as:
休假回到办公室后，我遇到了类似的问题。我在本地 IP 上运行我的服务器：
rails s thin -b <my_ip>
The problem was that my IP had changed, I just needed to use the new one.
问题是我的IP变了，我只需要使用新的。
