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Created attachment 668535 [details]
logs

Description of problem:

In sf1, I have a cluster which is 3.1 with 1 host that is rhel6.3 and one host which is 6.4. 
I cannot migrate a vm between these two hosts with the same error: migration job: unexpectedly failed

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

sf1
rhel6.3 host: 
==============

vdsm-4.9.6-44.2.el6_3.x86_64
libvirt-0.9.10-21.el6_3.7.x86_64
qemu-kvm-rhev-0.12.1.2-2.295.el6_3.10.x86_64

6.4 host:
===========

vdsm-4.10.2-1.0.el6.x86_64
qemu-kvm-rhev-0.12.1.2-2.337.el6.x86_64
libvirt-0.10.2-12.el6.x86_64

How reproducible:

100%

Steps to Reproduce:
1. install a 6.3 host and a 6.4 host in the same 3.1 cluster
2. run a vm on any of the hosts
3. migrate the vm
  
Actual results:

we fail to migrate the vm

Expected results:

since we will need to migrate vms during upgrade we should not fail. 

Additional info: logs from both hosts

This request was not resolved in time for the current release.
Red Hat invites you to ask your support representative to
propose this request, if still desired, for consideration in
the next release of Red Hat Enterprise Linux.

Created attachment 680128 [details]
Log from migration using virsh