[Impact] * nm-dhcp-helper sometimes fails to notify NetworkManager of a DHCP lease renewal due to a DBus race condition.
* Upstream NetworkManager 1.4 fixes the race condition by changing nm-dhcp-helper's DBus notification from signal "Event" to method "Notify". * Upstream backported NM 1.4's nm-dhcp-helper notification fix to NM 1.2. This SRU request applies that backported patch to Xenial's NM 1.2.x. [Test Case] * Not reliably reproducible. Out of hudreds of machines, only a dozen or so fail to notify NetworkManager of a DHCP lease renewal about 30-50% of the time. (i.e. It's always the same handful of machines that fail.) * All such machines with the patched packages have been fine for weeks, over many dozens of lease renewals. [Regression Potential] * Minimal. Upstream's patch falls back to the former behavior if the new behavior is not supported or times out. [Other Info] * Upstream bug w/ patch: https://bugzilla.gnome.org/show_bug.cgi?id=784636 * RHEL bug with links to the 1.4 commits from which the patch was derived: https://bugzilla.redhat.com/show_bug.cgi?id=1373276 ** Bug watch added: Red Hat Bugzilla #1373276 https://bugzilla.redhat.com/show_bug.cgi?id=1373276 ** Patch added: "nm-dhcp-helper.debdiff" https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1696415/+attachment/5006066/+files/nm-dhcp-helper.debdiff -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1696415 Title: NetworkManager does not update IPv4 address lifetime even though DHCP lease was successfully renewed To manage notifications about this bug go to: https://bugs.launchpad.net/network-manager/+bug/1696415/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
