[libvirt] virsh migrate with libvirt-0.5.1: failed to start listening VM

[Jakub Hrozek]

Hello,
I was trying to migrate a KVM/QEMU VM running on a Fedora 10 host to
another F10 host. Both machines have identical architectures (x86_64)
and are running identical versions of libvirt and KVM
(libvirt-0.5.1-2.fc10.x86_64, kvm-74-10.fc10.x86_64). However, the
migration fails:

# virsh migrate jhrozek-f11-minimal
qemu+ssh://someothersystem.example.com/system
libvir: QEMU error : operation failed: failed to start listening VM

On the target host, the logfile
/var/log/libvirt/qemu/jhrozek-f11-minimal.log says:
qemu: could not open disk image /var/lib/libvirt/images/jhrozek-f11-minimal.img

Which seems rather odd, isn't libvirt supposed to copy the image file?

Is this supposed to work? Is there any way to debug the problem? I
skimmed through RH Bugzilla and googled a bit but haven't found much
clue.

Help is appreciated,
Jakub