Rebooting hangs for 60 seconds if zfsutils-linux is installed (on DigitalOcean, 16.04)

Simos Xenitellis simos.lists at googlemail.com
Thu May 12 20:28:48 UTC 2016


Hi All,

I noticed that if you

1. create a fresh Ubuntu 16.04 amd64 VPS on DigitalOcean
2. install the package "zfsutils-linux"
3. reboot

then the rebooting hangs for exactly 60 seconds with the message on the console:

    A start job is running for udev  Waiting Service Initialization (55s / 3min)

That is, the mere installation of zfsutils-linux would cause that wait.

These are the messages from dmesg,

...
[    2.910863] systemd[1]: Started LVM2 metadata daemon.
[    2.911668] systemd[1]: Starting Create Static Device Nodes in /dev...
[    2.934691] systemd[1]: Started Journal Service.
[    2.980284] EXT4-fs (vda1): re-mounted. Opts: errors=remount-ro
[    3.033622] systemd-journald[686]: Received request to flush
runtime journal from PID 1
[    3.033966] iscsi: registered transport (iser)
[    3.632060] ppdev: user-space parallel port driver
[   63.681578] zavl: module license 'CDDL' taints kernel.
[   63.681584] Disabling lock debugging due to kernel taint
[   63.695493] SPL: Loaded module v0.6.5.6-0ubuntu1
[   63.754683] ZFS: Loaded module v0.6.5.6-0ubuntu3, ZFS pool version
5000, ZFS filesystem version 5
...

If you uninstall "zfsutils-linux", the reboot does not hang anymore.

My workaround for now has been to disable the zfs target at boot time:

           systemctl disable zfs.target

since I am interested in using ZFS in an a pre-allocated file instead
of a block device.

Simos




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