You have been subscribed to a public bug:
I am running an Ubuntu 16.04 server running on an HP Proliant chassis
with several lxc containers running on zfs. While performing a series
of debian updates on the host and container, as well as container
destruction/creation, the kernel spits out a stack trace indicating that
the there was a hung task while it was performing writeback in zfs.
If I attempt to perform a "sync" command on the host, the command will
not return. Also, if I attempt to reboot the server with the reboot
command, the server never reboots. A power cycle is required.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Tags: lxc zfs
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file system lockup with zfs hung task
https://bugs.launchpad.net/bugs/1686604
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