When i do upgrade form 18.04 to 20.04 with do-release-upgrade my system reboots
on systemctl daemon-reexec from /var/lib/dpkg/info/systemd.postinst code:
```
# skip daemon-reexec and try-restarts during shutdown to avoid hitting LP:
#1803391
if [ -n "$2" ] && [ "$(systemctl is-system-running)" != "stopping" ]; then
_systemctl daemon-reexec || true
# don't restart logind; this can be done again once this gets implemented:
# https://github.com/systemd/systemd/issues/1163
_systemctl try-restart systemd-networkd.service || true
_systemctl try-restart systemd-resolved.service || true
_systemctl try-restart systemd-journald.service || true
fi
```
command systemctl is-system-running return degradated.
If i execute systemctl daemon-reexec from hand while do-release-upgrade
waiting for accept changes on journald.conf, my system hangs.
There is strace -ff systemctl daemon-reexec:
https://pastebin.ubuntu.com/p/SkYnx8fdts/
** Bug watch added: github.com/systemd/systemd/issues #1163
https://github.com/systemd/systemd/issues/1163
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https://bugs.launchpad.net/bugs/1803391
Title:
Systemd update installation hangs in unattended-upgrades
InstallOnShutdown mode
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