title: Rabbitmq Server gets too slow
body: <p>I have some Rabbitmq server issues installed in Centos 7 when starting and stopping it. The server works well when connected to internet. It only takes 1 or 2 seconds to start it. But when disconnected to internet, it takes about 3~5 minutes to either start or stop it. There seems nothing wrong on the access log. </p>
  
  <p>I also checked what to set up in the configuration file. But I couldn't find any settings about starting server. Can you guys give some help for me? </p>