Hello All, I was powering off lot of VMs ( around 29 vms ) in one go, by selecting them all, and 'power off' option. While doing so, I see that 2 of the VMs are stuck in powering down state. I see the following exception in engine.log <snip> 2016-06-20 05:10:57,645 ERROR [org.ovirt.engine.core.vdsbroker.VmsMonitoring] (DefaultQuartzScheduler_Worker-53) [7f967349] Failed during vms monitoring on host host1.lab.eng.blr.redhat .com error is: java.lang.ClassCastException 2016-06-20 05:10:57,645 ERROR [org.ovirt.engine.core.vdsbroker.VmsMonitoring] (DefaultQuartzScheduler_Worker-53) [7f967349] Exception:: java.lang.ClassCastException </snip> and also the following error messages <snip> 2016-06-20 05:12:01,950 INFO [org.ovirt.engine.core.vdsbroker.VmAnalyzer] (DefaultQuartzScheduler_Worker-90) [] VM '59d48f24-d6b8-4e9e-b020-b728ed239da3(appvm03) is running in db and not running in VDS 'host1.lab.eng.blr.redhat.com' 2016-06-20 05:12:01,950 INFO [org.ovirt.engine.core.vdsbroker.vdsbroker.FullListVDSCommand] (DefaultQuartzScheduler_Worker-90) [] START, FullListVDSCommand(HostName = , FullListVDSCommandParameters:{runAsync='true', hostId='f4a25596-079b-44ed-970b-2142c67b9873', vds='Host[,f4a25596-079b-44ed-970b-2142c67b9873]', vmIds='[10c5e550-4b07-4a25-9a96-ae016864f2a8]'}), log id: 28c780ea 2016-06-20 05:12:02,038 INFO [org.ovirt.engine.core.vdsbroker.vdsbroker.FullListVDSCommand] (DefaultQuartzScheduler_Worker-90) [] FINISH, FullListVDSCommand, return: [{status=Up, nicModel=rtl8139,pv, emulatedMachine=rhel6.5.0, guestDiskMapping={e5051a6c-dc96-44eb-b={name=/dev/vda}, QEMU_DVD-ROM_QM00003={name=/dev/sr0}}, vmId=10c5e550-4b07-4a25-9a96-ae016864f2a8, pid=6368, devices=[Ljava.lang.Object;@67be1679, smp=2, vmType=kvm, displayIp=0, display=vnc, displaySecurePort=-1, memSize=4096, displayPort=5900, spiceSecureChannels=smain,sdisplay,sinputs,scursor,splayback,srecord,ssmartcard,susbredir, statusTime=4726355820, vmName=HostedEngine, clientIp=, pauseCode=NOERR}], log id: 28c780ea 2016-06-20 05:12:02,040 INFO [org.ovirt.engine.core.vdsbroker.VmsMonitoring] (DefaultQuartzScheduler_Worker-90) [] Received a memballoon Device without an address when processing VM 10c5e550-4b07-4a25-9a96-ae016864f2a8 devices, skipping device: {device=memballoon, specParams={model=none}, deviceType=balloon, type=balloon, alias=balloon0} 2016-06-20 05:12:02,040 ERROR [org.ovirt.engine.core.vdsbroker.VmsMonitoring] (DefaultQuartzScheduler_Worker-90) [] Failed during vms monitoring on host host1.lab.eng.blr.redhat.com error is: java.lang.ClassCastException 2016-06-20 05:12:02,040 ERROR [org.ovirt.engine.core.vdsbroker.VmsMonitoring] (DefaultQuartzScheduler_Worker-90) [] Exception:: java.lang.ClassCastException </snip> Any help ? Thanks, Satheesaran S