Bug#851402: failed unmounting /var during shutdown

[Michael Biebl]

On Sat, 14 Jan 2017 16:37:54 +0100 Daniel Pocock <daniel at pocock.pro> wrote:
> Package: systemd
> Version: 232-8
> Severity: important
> 
> 
> The box is running stretch, updated from jessie yesterday.
> 
> When the box shuts down, it unmounts all the filesystems.
> 
> When it gets to /var there is a warning: Failed unmounting /var
> 
> 
> I wrote a little wrapper script to put in place of /bin/umount, it calls
> lsof to show what is going on before the real umount call
> 
> The only open files on /var at the time of unmounting appear to be
> journalctl files
> 
> Is this expected?  Is some manual configuration needed to make sure /var
> is unmounted later 

/var should be unmounted later, after the final killing spree by
systemd-shutdown (see man 8 systemd-shutdown). I don't suppose you
actually had a dirty fs after shutdown?

As for /var being unmounted earlier during shutdown, this is most likely
happening because of var.mount conflicting with umount.target and
systemd-journald.service not having an explicit ordering against var.mount


I suppose you have persistent journal enabled, i.e. journald is writing
to /var/log/journal?

Fwiw, I think the warning is harmless (as said, systemd-shutdown will
unmount /var).



-- 
Why is it that all of the instruments seeking intelligent life in the
universe are pointed away from Earth?

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