zfs discuss - Dec 2009 - cannot receive new filesystem stream: invalid backup stream

I have two snv_126 systems. I''m trying to zfs send a recursive snapshot
from one system to another:
  # zfs send -v -R tww/opt/chroots at backup-20091225 |\
  ssh backupserver "zfs receive -F -d -u -v tww"
  ...
  found clone origin tww/opt/chroots/ab at ab-1.0
  receiving incremental stream of tww/opt/chroots/ab-1.0 at backup-20091225 into
tww/opt/chroots/ab-1.0 at backup-20091225
  cannot receive new filesystem stream: invalid backup stream

If I do the following on the origin server:
  # zfs destroy -r tww/opt/chroots/ab-1.0
  # zfs list -t snapshot -r tww/opt/chroots | grep ab-1.0 
  tww/opt/chroots/ab at ab-1.0
  tww/opt/chroots/hppa1.1-hp-hpux11.00 at ab-1.0
  tww/opt/chroots/hppa1.1-hp-hpux11.11 at ab-1.0
  ...
  # zfs list -t snapshot -r tww/opt/chroots | grep ab-1.0 |\
  while read a; do zfs destroy $a; done
then another zfs send like the above, the zfs send/receive succeeds.
However, If I then perform a few operations like the following:
  zfs snapshot tww/opt/chroots/ab at ab-1.0
  zfs clone tww/opt/chroots/ab at ab-1.0 tww/opt/chroots/ab-1.0
  zfs rename tww/opt/chroots/ab/hppa1.1-hp-hpux11.00
tww/opt/chroots/ab-1.0/hppa1.1-hp-hpux11.00
  zfs rename tww/opt/chroots/hppa1.1-hp-hpux11.00 at ab
tww/opt/chroots/hppa1.1-hp-hpux11.00 at ab-1.0
  zfs destroy tww/opt/chroots/ab/hppa1.1-hp-hpux11.00
  zfs destroy tww/opt/chroots/hppa1.1-hp-hpux11.00 at ab
  zfs snapshot tww/opt/chroots/hppa1.1-hp-hpux11.00 at ab
  zfs clone tww/opt/chroots/hppa1.1-hp-hpux11.00 at ab
tww/opt/chroots/ab/hppa1.1-hp-hpux11.00
  zfs rename tww/opt/chroots/ab/hppa1.1-hp-hpux11.11
tww/opt/chroots/ab-1.0/hppa1.1-hp-hpux11.11
  zfs rename tww/opt/chroots/hppa1.1-hp-hpux11.11 at ab
tww/opt/chroots/hppa1.1-hp-hpux11.11 at ab-1.0
  zfs destroy tww/opt/chroots/ab/hppa1.1-hp-hpux11.11
  zfs destroy tww/opt/chroots/hppa1.1-hp-hpux11.11 at ab
  zfs snapshot tww/opt/chroots/hppa1.1-hp-hpux11.11 at ab
  zfs clone tww/opt/chroots/hppa1.1-hp-hpux11.11 at ab
tww/opt/chroots/ab/hppa1.1-hp-hpux11.11
  ...
and then perform another zfs send/receive, the error above occurs. Why?

-- 
albert chin (china at thewrittenword.com)