Zpool wont import anymore on startup

[mstemmer]

It must have happend with some updates, but in Ubuntu 22.04 suddenly my zpool wouldnt import anymore automatically upon reboot. Never had that the years before...Works fine when using zpool import -a though...
Now, I have updated Ubuntu to 24.01 (6.8.0-44-generic) and zfsutils runs with version 2.2.2. Still the same issue.
I have found that the import by cache service reports a dependecy error, but cant track down, what this means.

○ zfs-import-cache.service - Import ZFS pools by cache file
     Loaded: loaded (/usr/lib/systemd/system/zfs-import-cache.service; enabled; preset: enabled)
     Active: inactive (dead)
       Docs: man:zpool(8)

Sep 13 14:24:37 L-xxxx systemd[1]: Dependency failed for zfs-import-cache.service - Import ZFS pools by cache file.
Sep 13 14:24:37 L-xxxx systemd[1]: zfs-import-cache.service: Job zfs-import-cache.service/start failed with result 'dependency'.

Tried to set the cachefile again, but no change...
Also any changes I make in /etc/defaults/zfs are ignored...why?
Any ideas would be very welcome!

[n0xena]

although I'm no expert I found this info:

a failure with reason "dependency" hints towards any other service this service depends on has failed

zfs-import-cache has these dependencies:

Requires=systemd-udev-settle.service
After=systemd-udev-settle.service
After=cryptsetup.target
After=multipathd.service
After=systemd-remount-fs.service

zfs-import-cache failing with reason "dependency" means that any of the above resulted in a failed state

I would start by investigating the status of the above services at the time zfs-import-cache is started - this should hint toward the cause