zfs discuss - Jan 2010 - zfs destroy snapshot: dataset already exists?

Hi,

I recently upgraded from 2009.06 to b131 (mainly to get dedup
support).  The upgrade to b131 went fairly smoothly, but then I ran
into an issue trying to get the old datasets snapshotted and
send/recv''d to dedup the existing data.  Here''s the steps I
ran:

zfs snapshot -r data/media at prereplicate
zfs create -o mountpoint=none data/media.new
zfs send -R data/media at prereplicate | zfs recv -du data/media.new

The zfs send/recv then failed with an error about a "dataset already
exists", unfortunately I don''t have the exact error message.

Then I tried to cleanup the data/media.new dataset to try it again and
ran into issues:

zfs destroy -r data/media.new
cannot destroy ''data/media.new/media/video at
zfs-auto-snap:hourly-2010-01-18-09:00'':
dataset already exists

So I try to get rid of the snapshot:

zfs destroy -r data/media.new/media/video at
zfs-auto-snap:hourly-2010-01-18-09:00
cannot destroy ''data/media.new/media/video at
zfs-auto-snap:hourly-2010-01-18-09:00'':
snapshot is cloned
no snapshots destroyed

Check for clones:
zfs get origin | grep
data/media.new/media/video at zfs-auto-snap:hourly-2010-01-18-09:00
data/media.new/media/video at zfs-auto-snap:hourly-2010-01-18-09:00
origin    -

I can''t seem to figure out why it won''t let me get rid of the
snapshot
or how it got messed up in the first place

I did see evidence in a Nexenta forum of similar issues:
http://www.mail-archive.com/gnusol-devel at lists.sonic.net/msg00566.html

Any ideas?

Thanks,

Nate