先看症状：

➜ xxx git:(master) ✗ rails g migration create_something
^C/Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/client/run.rb:98:in `gets': Interrupt
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/client/run.rb:98:in `verify_server_version'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/client/run.rb:56:in `run'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/client/run.rb:37:in `warm_run'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/client/run.rb:26:in `call'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/client/command.rb:7:in `call'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/client/rails.rb:24:in `call'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/client/command.rb:7:in `call'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/client.rb:28:in `run'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/bin/spring:49:in `<top (required)>'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/binstub.rb:11:in `load'
from /Users/user/.rvm/gems/ruby-2.3.0/gems/spring-1.6.3/lib/spring/binstub.rb:11:in `<top (required)>'
from /Users/user/Projects/project/bin/spring:13:in `require'
from /Users/user/Projects/project/bin/spring:13:in `<top (required)>'
from bin/rails:3:in `load'
from bin/rails:3:in `<main>'

不管怎么换代理呀，改网络啊，总是出错。同样是另一个项目就是正常的，后来才发现不同之处是新项目自带了spring. 是用来加快速度的。

在stackoverflow 也看到了同样的问题，还有ruby-china。

解决方案么也简单：

1. spring stop
2. 干掉spring