[Users] oVIRT3.3.3 Live Migration fails

Hello, I'm running into a funny problem on a CentOS 6.5 system Starting a VM on server1, migrate it to server2 and than back to server1 fails. The logs (engine and server1) are attached... server1: vdsm.x86_64 4.13.3-3.el6 @ovirt vdsm-cli.noarch 4.13.3-3.el6 @ovirt vdsm-python.x86_64 4.13.3-3.el6 @ovirt vdsm-python-cpopen.x86_64 4.13.2-1.el6 @ovirt vdsm-xmlrpc.noarch 4.13.3-3.el6 @ovirt qemu-img-rhev.x86_64 2:0.12.1.2-2.415.el6 @ovirt qemu-kvm-rhev.x86_64 2:0.12.1.2-2.415.el6 @ovirt qemu-kvm-rhev-tools.x86_64 2:0.12.1.2-2.415.el6 @ovirt server2: vdsm.x86_64 4.13.3-3.el6 @ovirt vdsm-cli.noarch 4.13.3-3.el6 @ovirt vdsm-python.x86_64 4.13.3-3.el6 @ovirt vdsm-python-cpopen.x86_64 vdsm-xmlrpc.noarch 4.13.3-3.el6 @ovirt qemu-img-rhev.x86_64 2:0.12.1.2-2.415.el6 qemu-kvm-rhev.x86_64 2:0.12.1.2-2.415.el6 Thank you for your help Hans-Joachim