title: java.io.IOException: Port not bound (found port -1). Is there an enabled firewall?
body: <p>Whenever i try for auto-complete for modules,properties,variables etc with Ctrl+Space I'm getting following error in auto-completion helper window. And I see editor showing few imported modules,properties,variables etc with red underlined saying "Undefined variable".</p>
  
  <p>How to fix this issue?</p>
  
  <p><strong>java.io.IOException: Port not bound (found port -1). Is there an enabled firewall?</strong></p>
  
  <p>OS: Fedora 20 with Firewall service enabled</p>
  
  <p>Editor: Aptana Studio 3.6.0 (Eclipse Platform: 4.3.2)</p>
  
  <p>Plugin: PyDev 3.0.0</p>