We discovered the issue in OST. the vm starts with no guest agent and we can see errors in vdsm.
vdsm should not report that as an error since it does not know if gues agent is installed.
Error snippet from engine:
2018-03-04 09:50:14,823-05 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (ForkJoinPool-1-worker-12)  EVENT_ID: VM_DOWN_ERROR(119), VM vm2 is down with error. Exit message: Lost connection with qemu process.
Error snippet from host:
Mar 4 09:56:27 lago-basic-suite-4-2-host-1 libvirtd: 2018-03-04 14:56:27.831+0000: 1189: error : qemuDomainAgentAvailable:6010 : Guest agent is not responding: QEMU guest agent is not connected
You can see logs here: http://jenkins.ovirt.org/job/ovirt-4.2_change-queue-tester/1019/artifact/
Those 2 errors do not seem related.
This will not be addressed in a reasonable timeframe. Please re-open if it's still important.