title: My websites load when I restart php-fpm apache
body: <p>I am using centos7 and I installed whm and so far I have no problem with Apache
  I maintain 22 websites on this server but I have a big problem
  Every few hours, it is not known exactly how many hours.
  No site or page will open at all, and if I restart the PHP-FPM service, the problem will be temporarily resolved.
  And all sites work fine but after a few hours the same problem occurs again and I have to restart PHP-FPM.
  The interesting thing is that no error is displayed and only the sites are not opened. thank you for your help</p>