Today my pbx was completely overloaded. 100% cpu usage (Load average was 120) and 100% memory. This process was running hundreds of times:
30803 root 20 0 515M 63120 1624 S 0.7 0.4 0:08.17 /usr/bin/php -q /var/www/html/admin/modules/contactmanager/hooks/update-contacts -1
31001 root 20 0 515M 63124 1624 S 0.7 0.4 0:07.68 /usr/bin/php -q /var/www/html/admin/modules/contactmanager/hooks/update-contacts -1
32441 root 20 0 515M 63124 1628 S 0.7 0.4 0:01.06 /usr/bin/php -q /var/www/html/admin/modules/contactmanager/hooks/update-contacts -1
489 root 20 0 515M 63120 1624 S 0.7 0.4 0:01.14 /usr/bin/php -q /var/www/html/admin/modules/contactmanager/hooks/update-contacts -1
I had to restart the server to fix the problem. Why would this happen?