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Description of problem:

When updating from libvirt-1.1.1-29.el7.x86_64 to
libvirt-1.2.8-2.el7.x86_64, libvirt %post script prints
this warning:

  Cleanup    : libvirt-daemon.x86_64                                      30/33 
/var/tmp/rpm-tmp.fCGAAr: line 8: libvirtd.socket: command not found
error: %preun(libvirt-daemon-1.2.8-1.el7.x86_64) scriptlet failed, exit status 127
Error in PREUN scriptlet in rpm package libvirt-daemon
  Cleanup    : libvirt-docs-1.1.1-29.el7.x86_64                           31/33 
error: libvirt-daemon-1.2.8-1.el7.x86_64: erase failed
  Cleanup    : libvirt-client-1.1.1-29.el7.x86_64                         32/33 

and then later this error:

libvirt-daemon-1.2.8-1.el7.x86_64 was supposed to be removed but is not!

and then:

$ rpm -q libvirt-daemon
libvirt-daemon-1.2.8-1.el7.x86_64
libvirt-daemon-1.2.8-2.el7.x86_64

I'm fairly sure I didn't have the libvirt-daemon-1.2.8-1.el7.x86_64
package installed before I started.  Not sure how it could have been
installed on its own?

Version-Release number of selected component (if applicable):

old: libvirt-1.1.1-29.el7.x86_64
new: libvirt-1.2.8-2.el7.x86_64

How reproducible:

Once.

It looks like I did install libvirt-daemon-1.2.8-1.el7.x86_64
on its own before (alongside the old libvirt).  In any case I now
cannot remove it:

Running transaction
/var/tmp/rpm-tmp.NM9cdZ: line 8: libvirtd.socket: command not found
error: %preun(libvirt-daemon-1.2.8-1.el7.x86_64) scriptlet failed, exit status 127
Error in PREUN scriptlet in rpm package libvirt-daemon-1.2.8-1.el7.x86_64
  Verifying  : libvirt-daemon-1.2.8-1.el7.x86_64                            1/1 

Failed:
  libvirt-daemon.x86_64 0:1.2.8-1.el7                                           

So maybe the error here is that libvirt-daemon cannot be removed?

Yes, this is a bug in the libvirt-daemon-1.2.8-1.el7.x86_64 package. You'll need to use  'rpm -e --noscripts libvirt-daemon-1.2.8-1.el7.x86_64' to kill it.

https://bugzilla.redhat.com/show_bug.cgi?id=1136736

*** This bug has been marked as a duplicate of bug 1136736 ***