rails console が立ち上がらない時

rails c

を打つも、何も反応がない。

Ctrl+cでキャンセルすると

^C/usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/run.rb:98:in `gets': Interrupt
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/run.rb:98:in `verify_server_version'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/run.rb:56:in `run'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/run.rb:37:in `warm_run'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/run.rb:26:in `call'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/command.rb:7:in `call'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/rails.rb:24:in `call'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client/command.rb:7:in `call'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/client.rb:26:in `run'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/bin/spring:48:in `<top (required)>'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/binstub.rb:11:in `load'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/gems/2.2.0/gems/spring-1.3.6/lib/spring/binstub.rb:11:in `<top (required)>'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'
    from /usr/local/var/rbenv/versions/2.2.0/lib/ruby/2.2.0/rubygems/core_ext/kernel_require.rb:54:in `require'

という記事を見つけたので、

bundle exec spring stop

すると、動くようになりました。