Public bug reported: I'm seeing exactly what this gist describes: https://gist.github.com/raggi/1f8d0b9f45c5b62e7131b03e6e2ffe68
Summary: 1. Configure a machine with a DHCPv4 lease on a network with a DHCPv4 server. 2. Place machine under unusual load sufficient to cause a timeout on netlink requests. 3. Observe the interface failing with the following logs: systemd-networkd[139370]: eth0: Could not set DHCPv4 address: Connection timed out systemd-networkd[139370]: eth0: Failed The error seems to come from here: https://github.com/systemd/systemd/blob/v245.4/src/network/networkd-dhcp4.c#L781 Expected behavior The DHCPv4 client should retry the lease refresh when the issue is a timeout, eventually succeeding in these scenarios. Actual behavior Permanent loss of connectivity on the affected interface. Additional info: $ lsb_release -rd Description: Ubuntu 20.04.6 LTS Release: 20.04 $ apt-cache policy systemd systemd: Installed: 245.4-4ubuntu3.23 Candidate: 245.4-4ubuntu3.23 Version table: *** 245.4-4ubuntu3.23 500 500 http://ap-southeast-2.ec2.archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages 500 mirror+file:/etc/apt/source-mirrors.txt focal-updates/main amd64 Packages 100 /var/lib/dpkg/status 245.4-4ubuntu3.20 500 500 http://security.ubuntu.com/ubuntu focal-security/main amd64 Packages 500 mirror+file:/etc/apt/source-mirrors.txt focal-security/main amd64 Packages 245.4-4ubuntu3 500 500 http://ap-southeast-2.ec2.archive.ubuntu.com/ubuntu focal/main amd64 Packages 500 mirror+file:/etc/apt/source-mirrors.txt focal/main amd64 Packages ** Affects: systemd (Ubuntu) Importance: Undecided Status: New ** Tags: dhcp systemd systemd-networkd -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2054977 Title: systemd-networkd fails to renew DHCP v4 lease when renew attempt times out To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2054977/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
