Reproducing the bug on zesty:
$ dpkg-query -W systemd
systemd 232-21ubuntu5
$ bash test.sh
accounts-daemon.service : Tasks: 3 (limit: 4915)
acpid.service : Tasks: 1 (limit: 4915)
atd.service : Tasks: 1 (limit: 4915)
cron.service : Tasks: 1 (limit: 4915)
dbus.service : Tasks: 1 (limit: 4915)
iscsid.service : Tasks: 2 (limit: 4915)
lvm2-lvmetad.service : Tasks: 1 (limit: 4915)
lxcfs.service : Tasks: 3 (limit: 4915)
polkit.service : Tasks: 3 (limit: 4915)
rsyslog.service : Tasks: 4 (limit: 4915)
snapd.service : Tasks: 6 (limit: 4915)
ssh.service : Tasks: 1 (limit: 4915)
systemd-journald.service : Tasks: 1 (limit: 4915)
systemd-logind.service : Tasks: 1 (limit: 4915)
systemd-networkd.service : Tasks: 1 (limit: 4915)
systemd-resolved.service : Tasks: 1 (limit: 4915)
systemd-timesyncd.service : Tasks: 2 (limit: 4915)
systemd-udevd.service : Tasks: 1
accounts-daemon.service :
acpid.service :
atd.service :
cron.service :
dbus.service :
iscsid.service :
lvm2-lvmetad.service :
lxcfs.service :
polkit.service :
rsyslog.service :
snapd.service :
ssh.service :
systemd-journald.service :
systemd-logind.service :
systemd-networkd.service :
systemd-resolved.service :
systemd-timesyncd.service :
systemd-udevd.service :
accounts-daemon.service : Tasks: 3 (limit: 4915)
acpid.service : Tasks: 1 (limit: 4915)
atd.service : Tasks: 1 (limit: 4915)
cron.service : Tasks: 1 (limit: 4915)
dbus.service : Tasks: 1 (limit: 4915)
iscsid.service : Tasks: 2 (limit: 4915)
lvm2-lvmetad.service : Tasks: 1 (limit: 4915)
lxcfs.service : Tasks: 3 (limit: 4915)
polkit.service : Tasks: 3 (limit: 4915)
rsyslog.service : Tasks: 4 (limit: 4915)
snapd.service : Tasks: 6 (limit: 4915)
ssh.service : Tasks: 1 (limit: 4915)
systemd-journald.service : Tasks: 1 (limit: 4915)
systemd-logind.service : Tasks: 1 (limit: 4915)
systemd-networkd.service : Tasks: 1 (limit: 4915)
systemd-resolved.service : Tasks: 1 (limit: 4915)
systemd-timesyncd.service : Tasks: 2 (limit: 4915)
systemd-udevd.service : Tasks: 1
Upgrading
$ dpkg-query -W systemd
systemd 232-21ubuntu7
$ bash test.sh
accounts-daemon.service : Tasks: 3 (limit: 4915)
acpid.service : Tasks: 1 (limit: 4915)
atd.service : Tasks: 1 (limit: 4915)
cron.service : Tasks: 1 (limit: 4915)
dbus.service : Tasks: 1 (limit: 4915)
iscsid.service : Tasks: 2 (limit: 4915)
lvm2-lvmetad.service : Tasks: 1 (limit: 4915)
lxcfs.service : Tasks: 3 (limit: 4915)
polkit.service : Tasks: 3 (limit: 4915)
rsyslog.service : Tasks: 4 (limit: 4915)
snapd.service : Tasks: 5 (limit: 4915)
ssh.service : Tasks: 1 (limit: 4915)
systemd-journald.service : Tasks: 1 (limit: 4915)
systemd-logind.service : Tasks: 1 (limit: 4915)
systemd-networkd.service : Tasks: 1 (limit: 4915)
systemd-resolved.service : Tasks: 1 (limit: 4915)
systemd-timesyncd.service : Tasks: 2 (limit: 4915)
systemd-udevd.service : Tasks: 1
accounts-daemon.service : Tasks: 3 (limit: 4915)
acpid.service : Tasks: 1 (limit: 4915)
atd.service : Tasks: 1 (limit: 4915)
cron.service : Tasks: 1 (limit: 4915)
dbus.service : Tasks: 1 (limit: 4915)
iscsid.service : Tasks: 2 (limit: 4915)
lvm2-lvmetad.service : Tasks: 1 (limit: 4915)
lxcfs.service : Tasks: 3 (limit: 4915)
polkit.service : Tasks: 3 (limit: 4915)
rsyslog.service : Tasks: 4 (limit: 4915)
snapd.service : Tasks: 5 (limit: 4915)
ssh.service : Tasks: 1 (limit: 4915)
systemd-journald.service : Tasks: 1 (limit: 4915)
systemd-logind.service : Tasks: 1 (limit: 4915)
systemd-networkd.service : Tasks: 1 (limit: 4915)
systemd-resolved.service : Tasks: 1 (limit: 4915)
systemd-timesyncd.service : Tasks: 2 (limit: 4915)
systemd-udevd.service : Tasks: 1
accounts-daemon.service : Tasks: 3 (limit: 4915)
acpid.service : Tasks: 1 (limit: 4915)
atd.service : Tasks: 1 (limit: 4915)
cron.service : Tasks: 1 (limit: 4915)
dbus.service : Tasks: 1 (limit: 4915)
iscsid.service : Tasks: 2 (limit: 4915)
lvm2-lvmetad.service : Tasks: 1 (limit: 4915)
lxcfs.service : Tasks: 3 (limit: 4915)
polkit.service : Tasks: 3 (limit: 4915)
rsyslog.service : Tasks: 4 (limit: 4915)
snapd.service : Tasks: 5 (limit: 4915)
ssh.service : Tasks: 1 (limit: 4915)
systemd-journald.service : Tasks: 1 (limit: 4915)
systemd-logind.service : Tasks: 1 (limit: 4915)
systemd-networkd.service : Tasks: 1 (limit: 4915)
systemd-resolved.service : Tasks: 1 (limit: 4915)
systemd-timesyncd.service : Tasks: 2 (limit: 4915)
systemd-udevd.service : Tasks: 1
Looking much better.
** Tags removed: verification-needed verification-needed-zesty
** Tags added: verification-done verification-done-zesty
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/1702823
Title:
Systemd fails to serialize tasks correctly on daemon-reload
Status in systemd:
Fix Released
Status in systemd package in Ubuntu:
Fix Released
Status in systemd source package in Zesty:
Fix Committed
Status in systemd source package in Artful:
Fix Released
Status in systemd package in Debian:
Fix Released
Bug description:
[Impact]
A unit with multiple Exec stanzas will loose execution state (which stanzas,
out of multiple, have executed or not) upon systemd daemon-reload during the
execution of these stanzas. This results in lost data/state, and units
potentially failing to start/restart in unpredictable manner
[Testcase]
Setup a race of a unit with multiple exec stanzas (e.g. echo, sleep, echo)
and execute daemon-reload whilst that is in progress. The execution state
should persist across daemon-reload with all exec stanzas completing, in order,
without duplicates.
[Original Bug report]
Hi,
I was initially tracking down a libvirt bug [1], but happened to realize it
is actually a general systemd issue.
From there I got to file, discuss and test [2].
For now I file the bug to be ablte to do my tests correctly, but if it
really fixes the issue I'd like to suggest to fix it in the release -
so better file upfront and do even my test patches right.
[1]: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=867379
[2]: https://github.com/systemd/systemd/issues/6299.
[Regression Potential]
Minimal, this is a fix for incorrect upstream behaviour which resolves a racy
condition. The code changes are upstream reviewed cherry-pick.
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https://bugs.launchpad.net/systemd/+bug/1702823/+subscriptions
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