title: Understand Symfony Error Logging
body: <p>I 've set up my application to send my an email upon error with monolog so I've got some mails and try to confugure what the error was. There was lots of mails with the same error: </p>
  
  <p>event.DEBUG: Notified event "kernel.response" to listener "Symfony\Component\HttpKernel\EventListener\StreamedResponseListener::onKernelResponse". [] []</p>
  
  <p>It may be a very general type of error but I cannot understand what it means and I cannot find the corresponding documentation on error logging so I would be very grateful if anyone could help me about what this error means and when is it triggered.</p>