I don't know if it helps, but see this attachment of my /var/log/squid/cache.log showing it stopping and starting again immediately during shutdown.
** Attachment added: "cache.log" http://launchpadlibrarian.net/41723989/cache.log -- does not terminate at computer shutdown https://bugs.launchpad.net/bugs/539469 You received this bug notification because you are a member of Ubuntu Server Team, which is subscribed to squid in ubuntu. -- 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