I can confirm this bug. Workaround ( NOT for production server ) is to disable session cleaning cron job ( /etc/cron.d/php5 ) as reported here http://ubuntuforums.org/showthread.php?p=11355965 .
Ubuntu version: 11.10 Upgraded from: 11.04 -- You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to php5 in Ubuntu. https://bugs.launchpad.net/bugs/876387 Title: fuser forking uncontrollably in cron job To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/php5/+bug/876387/+subscriptions -- Ubuntu-server-bugs mailing list Ubuntu-server-bugs@lists.ubuntu.com Modify settings or unsubscribe at: https://lists.ubuntu.com/mailman/listinfo/ubuntu-server-bugs