title: proc_open Too many open files in long running Symfony Console app
body: <p>I built a console app with Symfony Console component. It supposed to be run for 5 hours. But after running 2 hours i have a <code>proc_open(): unable to create pipe Too many open files</code> error in <code>Symfony\Component\Console\Application.php</code> on line 985.</p>
  
  <p>I tried <code>gc_collect_cycles</code> in my loop, but got the same error.</p>
  
  <p>Is this a Symfony Console component bug or i should not run an app for this long (but i have to)?</p>