title: How to limit the connections number Finagle creates?
body: <p>I use Finalge <code>https://twitter.github.io/finagle/</code> to test the timeout case like this:</p>
  
  <ol>
  <li>Server side: in the RPC definition, Just sleep 10 secs and return.</li>
  <li>Client side: call RPC function using <code>within</code> like <code>within(50.milliseconds) onSuccess { ... } onFailure { ... }</code></li>
  <li>Many clients: use about 100 clients to call the RPC function at the same time</li>
  </ol>
  
  <p>The result is that all the RPCs are timeout of course. But, when I use <code>netstat</code> to check the connection I find that there are 100 <code>ESTABLISHED</code> connection. The question is can I limit the connections number Finagle create ?  </p>