Comment 4 for bug 1850130

from what I can see is that its trying to do importing before the disks have been mapped because /etc/multipath.conf is being read just after zfs failed

Dec 11 23:04:57 aio systemd[1]: Started Mount ZFS filesystems.
Dec 11 23:04:57 aio systemd[1]: Starting Mount ZFS filesystems...
Dec 11 23:04:57 aio systemd[1]: Reached target ZFS pool import target.
Dec 11 23:04:57 aio systemd[1]: Failed to start Import ZFS pools by cache file.
Dec 11 23:04:57 aio systemd[1]: zfs-import-cache.service: Failed with result 'exit-code'.
Dec 11 23:04:57 aio systemd[1]: zfs-import-cache.service: Main process exited, code=exited, status=1/FAILURE
Dec 11 23:04:57 aio zpool[3622]: a backup source.
Dec 11 23:04:57 aio zpool[3622]: Destroy and re-create the pool from
Dec 11 23:04:57 aio zpool[3622]: cannot import 'ZFS3WAY': no such pool or dataset
Dec 11 23:04:57 aio multipathd[3627]: path checkers start up
Dec 11 23:04:57 aio multipathd[3627]: read /etc/multipath.conf
Dec 11 23:04:57 aio multipathd[3627]: --------start up--------
Dec 11 23:04:57 aio kernel: rdac: device handler registered
Dec 11 23:04:57 aio kernel: emc: device handler registered
Dec 11 23:04:57 aio kernel: alua: device handler registered
Dec 11 23:04:57 aio systemd[1]: Starting Import ZFS pools by cache file...
Dec 11 23:04:57 aio systemd[1]: Started Install ZFS kernel module.
Dec 11 23:04:57 aio systemd[1]: Starting Device-Mapper Multipath Device Controller...
Dec 11 23:04:57 aio systemd[1]: Starting Install ZFS kernel module...
Dec 11 23:04:57 aio systemd[1]: Started udev Wait for Complete Device Initialization.
Dec 11 23:04:57 aio kernel: ZFS: Loaded module v0.8.2-1, ZFS pool version 5000, ZFS filesystem version 5
Dec 11 23:04:57 aio systemd[1]: Condition check resulted in Forward Password Requests to Plymouth Directory Watch being skipped.
Dec 11 23:04:57 aio systemd[1]: Condition check resulted in Show Plymouth Boot Screen being skipped.
Dec 11 23:04:57 aio systemd[1]: Starting LVM event activation on device 9:0...
Dec 11 23:04:57 aio systemd[1]: Created slice system-lvm2\x2dpvscan.slice.