The following error appears if none of domains uses PHP-FPM 5.4.4:
# /etc/init.d/plesk-php54-fpm status
plesk-php54-fpm.service - The PHP 5.4.45 FastCGI Process Manager Loaded: loaded (/lib/systemd/system/plesk-php54-fpm.service; disabled) Active: failed (Result: exit-code) since Fri 2015-11-13 00:06:06 EST; 16min ago Process: 10535 ExecStart=/opt/plesk/php/5.4/sbin/php-fpm --nodaemonize (code=exited, status=78) Main PID: 10535 (code=exited, status=78)
Bug #PPPM-3571 . It is fixed in Plesk Onyx.
Upgrade to the latest Plesk version .
If upgrade is not possible:
Add an attached default.conf file to
Switch at least one domain to PHP 5.4.45 FPM