title: IntelliJ IDEA - Address localhost:1099 is already in use
body: <p>I try to launch a web application with IntelliJ IDEA, but I get an error: <code>localhost:1099 already in use</code>.</p>
  
  <p><img src="https://i.stack.imgur.com/BOR1F.png" alt="port 1099 is already in use"></p>
  
  <p>I checked the port 1099 with <code>lsof -i:1099</code> and many other relative commands, so I'm pretty sure the port 1099 is free.</p>
  
  <p>This is my running configuration:</p>
  
  <p><img src="https://i.stack.imgur.com/nfh7R.png" alt="configs"></p>
  
  <p>I've also changed the <code>JMX port</code> to 6666 &amp; 6667 &amp; 6668... and it doesn't work, so I think it's not really related to the port itself.</p>
  
  <p>I am so confused... did anyone else have this problem? </p>
  
  <p>Any help is appreciated</p>