This bug was fixed in the package systemd - 245.6-1ubuntu1
---------------
systemd (245.6-1ubuntu1) groovy; urgency=medium
[ Balint Reczey ]
* Merge to Ubuntu from Debian unstable
- Dropped changes:
* Don't try calling NULL callback in bus_wait_for_units_clear.
* test: Skip test-boot-timestamps on permission denied.
* From journald: stream pid change newline fix
-
debian/patches/lp1875708/journald-Increase-stdout-buffer-size-sooner-when-almost-f.patch
* meson: initialize time-epoch to reproducible builds compatible value
* dhclient-exit-hooks.d/timesyncd: Act only when systemd-timesyncd is enabled
(LP: #1873031)
File: debian/extra/dhclient-exit-hooks.d/timesyncd
https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=7d5a31fb7523d1ecef0d2932df5efa3b99322919
* debian/udev.postinst: Allow kvm to be an already present non-system group
(LP: #1880541)
File: debian/udev.postinst
https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=8b5c31828d4323ddb719326b1316c179b7cdbdef
* Cherry-pick reversion of detecting WSL by the presence of "microsoft" in
osrelease
File: debian/patches/Revert-detect-virt-also-detect-microsoft-as-WSL.patch
https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=e13f4452698b84ecb0ca6b7950b5f0c42c02c2cf
[ Ryan Harper ]
* Skip over by-uuid/by-label symlinks for bcache backing and cache devices
(LP: #1861941)
File:
debian/patches/lp1861941-dont-generate-disk-byuuid-for-bcache-uuid.patch
https://git.launchpad.net/~ubuntu-core-dev/ubuntu/+source/systemd/commit/?id=4b9a0e888ca40eaed561ec48aece23218fab18ff
systemd (245.6-1) unstable; urgency=medium
[ Michael Biebl ]
* New upstream version 245.6
* Rebase patches
[ Balint Reczey ]
* debian/tests/boot-and-services: Handle missing fstab (LP: #1877078)
-- Balint Reczey <rbal...@ubuntu.com> Thu, 11 Jun 2020 12:54:02 +0200
** Changed in: systemd (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1873031
Title:
245.4-2ubuntu1 throws stderr messages on timesyncd restart in its dhcp
hook
Status in chrony package in Ubuntu:
Fix Released
Status in systemd package in Ubuntu:
Fix Released
Bug description:
systemd has broken this by the split of timesyncd.
On a system that installed chrony (or other NTP servers) you'll have:
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name Version Architecture Description
+++-=================-==============-============-===============================================================
ii chrony 3.5-6ubuntu3 amd64 Versatile implementation of
the Network Time Protocol
rc systemd-timesyncd 245.4-4ubuntu1 amd64 minimalistic service to
synchronize local time with NTP servers
That left this behind:
/etc/dhcp/dhclient-exit-hooks.d/timesyncd
And if you now run a dhcp based time server push it will fail very
badly.
P.S. This is triggered by the chrony autopkgtests but not an issue in chrony
yet it is in systemd.
But due to that one can use [1] as easy reproducer, I wonder how systemd
slipped by this issue in autopkgtest?
It contains:
systemctl try-restart systemd-timesyncd.service || true
Which in the setup the system now has will trigger:
sudo dhclient dummy0
Failed to try-restart systemd-timesyncd.service: Unit
systemd-timesyncd.service is masked.
P.S. I'll harden the chrony test to not stumble over this but it
should be revisited for systemd to provide a better fix than causing
this message every time (maybe pre-check if it is enabled and
unmasked)?
[1]: https://git.launchpad.net/ubuntu/+source/chrony/tree/debian/tests
/time-sources-from-dhcp-servers?h=ubuntu/focal-devel
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