The output only shows the results, not the order of mount attempts. It may be the case that there is an ordering bug here. But we need to rule out the other case first. It could easily be the case that the directory is non-empty, so the /var/share mount failed even though it was properly attempted first.
Try manually unmounting everything under /var/share. Then rmdir the empty lxc directory. Once you are certain that /var/share is empty, re- run zfs mount -a. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to zfs-linux in Ubuntu. https://bugs.launchpad.net/bugs/1694090 Title: ZoL: wrong import order prevents boot Status in zfs-linux package in Ubuntu: Incomplete Bug description: I've the following zfs: # zfs list -r rpool/VARSHARE NAME USED AVAIL REFER MOUNTPOINT rpool/VARSHARE 114K 165G 30K /var/share rpool/VARSHARE/lxc 84K 165G 19K /var/share/lxc rpool/VARSHARE/lxc/xenial 65K 165G 19K /var/share/lxc/xenial rpool/VARSHARE/lxc/xenial/pkg 19K 165G 19K /var/share/lxc/xenial/pkg rpool/VARSHARE/lxc/xenial/rootfs-amd64 27K 165G 27K /var/share/lxc/xenial/rootfs-amd64 On boot, we see Starting Mount ZFS filesystems... [FAILED] Failed to start Mount ZFS filesystems. See 'systemctl status zfs-mount.service' for details. Welcome to emergPress Enter for maintenance (or press Control-D to continue): # df -h /var/share rpool/VARSHARE/lxc 165G 0 165G 0% /var/share/lxc rpool/VARSHARE/lxc/xenial 165G 0 165G 0% /var/share/lxc/xenial rpool/VARSHARE/lxc/xenial/pkg 165G 0 165G 0% /var/share/lxc/xenial/pkg rpool/VARSHARE/lxc/xenial/rootfs-amd64 165G 0 165G 0% /var/share/lxc/xenial/rootfs-amd64 Obviously rpool/VARSHARE - the parent of rpool/VARSHARE/lxc - was not mounted, even so canmount property is for all set to on, rpool/VARSHARE's mountpoint to /var/share and rpool/VARSHARE/lxc children inherit their mountpoint. # systemctl status zfs-mount.service ● zfs-mount.service - Mount ZFS filesystems Loaded: loaded (/lib/systemd/system/zfs-mount.service; static; vendor preset: enabled) Active: failed (Result: exit-code) since Sun 2017-05-28 04:51:46 CEST; 13min ago Process: 6935 ExecStart=/sbin/zfs mount -a (code=exited, status=1/FAILURE) Main PID: 6935 (code=exited, status=1/FAILURE) May 28 04:51:45 ares systemd: Starting Mount ZFS filesystems... May 28 04:51:45 ares zfs: cannot mount '/var/share': directory is not empty May 28 04:51:46 ares systemd: zfs-mount.service: Main process exited, code=exited, status=1/FAILURE May 28 04:51:46 ares systemd: Failed to start Mount ZFS filesystems. May 28 04:51:46 ares systemd: zfs-mount.service: Unit entered failed state. May 28 04:51:46 ares systemd: zfs-mount.service: Failed with result 'exit-code'. So 'zfs mount ...' seems to be severely buggy. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/zfs-linux/+bug/1694090/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : email@example.com Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp