title: pcntl_async_signals() has been disabled for security reasons || Ubuntu 16 - Laravel 5.6
body: <p>I have a server running on Ubuntu 16.04 running Laravel app version 5.6.29 on PHP version 7.2.8. </p>
  
  <p>I have set up some queue jobs to upload videos to the server and compile them and upload to s3 bucket. Suddenly from the past few hours,I am facing the following issue. </p>
  
  <blockquote>
    <p>pcntl_async_signals() has been disabled for security reasons</p>
  </blockquote>
  
  <p>I have also tried the solution from this thread <a href="https://stackoverflow.com/a/16262922">https://stackoverflow.com/a/16262922</a><br>
  It's not helping either. </p>
  
  <p><a href="https://i.stack.imgur.com/sLzk8.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/sLzk8.png" alt="enter image description here"></a></p>
  
  <hr>
  
  <p>Edit : I also tried restarting queue worker, Running the queue worker manually. Also tried restarting supervisorctl. </p>
  
  <pre><code>sudo supervisorctl restart all
  php artisan queue:restart
  php artisan queue:work
  </code></pre>