syslog: Failed start mount ZFS filesystems

Question

I'm getting this error since trying to upgrade to Ubuntu 20. For the reference, I never wanted to install ZFS on this computer, never did anything to that effect, and, subsequently, there are no ZFS volumes / pools or anything like that on this computer.
Why is this happening / how can I disable this behavior? I don't have a kernel module for ZFS, so there's nothing to blacklist.
I figured that the effects of whatever kernel is doing there might be benign, I still don't want it to spew suspicious errors.

Gordan Bobic · Accepted Answer

That isn't a kernel message, that is a message from a systemd service that mounts ZFS file systems. Something like the following should stop it trying to do that:
systemctl disable zfs-mount
systemctl disable zfs-import-cache

Or you could just leave it as is, the message doesn't indicate an actual problem.

syslog: Failed start mount ZFS filesystems

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