On Thu, 31 Mar 2016, Jim Klimov wrote:
Forgot to add: the cases similar to what i described can be inspected with
fuser (-c, -m IIRC) to see if any processes block the zoneroot filesystems.
Also blockage can be due to mounts underneath and other kernel-provided
blockers, that userspace fuser won't show.
In particular then look out for nfs+autofs client in a zone (something sol10
documented as a no-no, especiakly to not use nfs from gz of the same server,
but which just worked and was cool to e.g. share homedirs or distribs, and so
was widely used) - perhaps autofs failed to unmount something from a remote
host, then was killed by lz shutdown, and then the remaining sub-fs blocks the
zoneroot teardown.
This is not my situation. None of the zones are currently doing nfs
client mounts or have any dependence on the root zone other than lofi
mounts to a zfs filesystem. However, there is a "Device busy" type
error.
Some may remember that there are messages on the console which suggest
a resource contention problem and that I previously captured some
information and made it available under this ftp URL:
ftp://ftp.simplesystems.org/pub/outgoing/omnios/zoneadmd/
The zoneadmd program issues logs with text like:
"failed to open console master: Device busy"
" WARNING: could not open master side of zone console for pkgbuild to
release slave handle: Device busy"
"WARNING: console /devices//pseudo/zconsnex@1/zcons@1 found, but it
could not be removed.: I/O error"
It is not clear if this "console master" is continually busy (someting
forgot/failed to close it) or if it is a transient condition which
would clear itself and be fine after waiting some tens of milliseconds
and retrying. What is clear is that the condition continues after it
first occurs although other usages of the zone are fine.
Bob
--
Bob Friesenhahn
bfrie...@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/
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