For memory it was : "Temporary I disabled apparmor interception for isc-dhcpd-server by symlinking to disable folder.
# ln -s /etc/apparmor.d/usr.sbin.dhcpd /etc/apparmor.d/disable/
and restartet the dhcpd. This solves the problem, but it let the dhcpd be unprotected by apparmor."
Rob Traders's fix does not work for me at all.
For memory it was : "Temporary I disabled apparmor interception for isc-dhcpd-server by symlinking to disable folder. d/usr.sbin. dhcpd /etc/apparmor. d/disable/
# ln -s /etc/apparmor.
and restartet the dhcpd. This solves the problem, but it let the dhcpd be unprotected by apparmor."