title: NettyIO disconnect Client from Server
body: <p>How can I disconnect a netty client from the server so it executes the <code>handerRemoved</code> method on the server side and completely stops running? I tried using <code>group.shutDownGraceFully()</code> but the client still keeps connected to the server. Is there any method I am missing?</p>
  
  <p>I also noticed when I try to connect to the server and it is not reachable (connection refused), the next time I connect to a real server it connects but it does not send or get any more messages.</p>