Thanks for the detailed report. It looks like it's the same issue as https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=927302, so I'm linking them both together.
** Bug watch added: Debian Bug tracker #927302 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=927302 ** Also affects: apache2 (Debian) via https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=927302 Importance: Unknown Status: Unknown -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1832182 Title: systemd unable to detect running apache if invoked via "apache2ctl graceful" To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/apache2/+bug/1832182/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs