Rubyonrails Ruby on Rails 控制台在加载时挂起

无论出于何种原因，Ruby on Rails控制台拒绝启动；就这么挂着.我没有对代码做任何更改，其他使用相同版本Ruby和Ruby on Rails的项目也没有问题.当我最终按下Ctrl键时，我得到了这个堆栈跟踪，它指向Spring.

我无法解释为什么这一刻发生在下一刻，在那里它工作得很好.我已经通过RVM清除了所有的gem，并重新安装了all-through bundle命令，但仍然没有运气.任何 idea 都将不胜感激.

而且据我所知，Ruby on Rails服务器没有问题.这个问题与项目有关，但是没有任何代码发生更改，只有Ruby on Rails控制台存在这个问题.

Ruby 2.1.2
Rails 4.1.4

user_a@ubuntu:~/work/app_a$ rails console
^C/home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client/run.rb:54:in `gets': Interrupt
    from /home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client/run.rb:54:in `verify_server_version'
    from /home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client/run.rb:25:in `call'
    from /home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call'
    from /home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client/rails.rb:23:in `call'
    from /home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call'
    from /home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/client.rb:26:in `run'
    from /home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/bin/spring:48:in `<top (required)>'
    from /home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `load'
    from /home/user_a/.rvm/gems/ruby-2.1.2/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `<top (required)>'
    from /home/user_a/work/app_a/bin/spring:16:in `require'
    from /home/user_a/work/app_a/bin/spring:16:in `<top (required)>'
    from bin/rails:3:in `load'
    from bin/rails:3:in `<main>'

user_a@ubuntu:~/work/app_a$