Re: [systemd-devel] systemd-user-sessions.service: Failed to create cgroup /system.slice/systemd-user-sessions.service: No such file or directory

[Michal Koutný]

Hi.

Is this still relevant?

On Sun, May 10, 2020 at 08:51:09AM -0700, Nebu Pookins  
wrote:
> Specifically, the systemd-user-sessions service is failing with the
> following messages:
The cgroup hierarchy is built in-memory on each boot based on your
configuration. I'm skeptical how the outage with potential file
corruption could cause this error.
Furthermore, failure of systemd-user-sessions.service should fail the
whole boot up transaction.

I think this error message is a red herring resolving the post-outage
issues.

(Is systemd-user-sessions.service the only service that fails like this?
What systemd version is that?
What cgroup setup do you use (e.g. hybrid vs unified)? Are there any
other programs that would modify cgroup hierarchy?)


Regards,
Michal



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[systemd-devel] systemd-user-sessions.service: Failed to create cgroup /system.slice/systemd-user-sessions.service: No such file or directory

[Nebu Pookins]

Hi, I'm running an Archlinux system which recently experienced a power
outage, and now I am unable to boot into the system. Specifically, the
systemd-user-sessions service is failing with the following messages:

```
systemd-user-sessions.service: Failed to create
cgroup /system.slice/systemd-user-sessions.service: No such file or
directory
systemd-user-sessions.service: Failed at step CGROUP spawning
/usr/lib/systemd/systemd-user-sessions: No such file or directory
Subject: process /usr/lib/systemd-user-sessions could not be executed
Defined-By: systemd
Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel

The process /usr/lib/systemd/systemd-user-sessions could not be executed
and failed.

The error number returned by this process is ERRNO.
systemd-user-sessions.service: Main process exited, code=exited,
status=219/CGROUP
Subject: Unit process exited
Defined-By: systemd
Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel

An ExecStart= process belonging to unit systemd-user-sessions.service has
exited.

The process' exit code is 'exited' and its exit status is 219.
```

Would appreciate any help in diagnosing and fixing this, including perhaps
instructions on how to "reinstall systemd" to repair any corrupted files if
that might be the issue? I tried `pacman -S systemd` to force a reinstall
of that package, but the error persists.

Thanks,
Nebu
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