Adding a host running vdsm master fail now with this error in engine 4.2.2.1-1.el7.centos 2018-02-28 22:52:07,847+02 ERROR [org.ovirt.engine.core.vdsbroker.monitoring.HostMonitoring] (EE-ManagedThreadFactory-engineScheduled-Thread-21) [] Unable to RefreshCapabilities: IllegalArgumentException: OvsSupported has no value for version: 4.3 Engine is stuck in a loop, sending Host.getCapabilties, and failing. See error can be seen in OST when running vdsm master with engine 4.2: Engine: http://jenkins.ovirt.org/view/oVirt%20system%20tests/job/ovirt-system-tes... Vdsm: http://jenkins.ovirt.org/view/oVirt%20system%20tests/job/ovirt-system-tes... Adding same host running vdsm-4.19.2 works. Is this known issue? Nir