Hi, An interesting thing just happened on my oVirt deployment. While setting a host for maintenance, one of the VMs running on that host failed to migrate. Then ovirt-engine for some reason turned the VM off. Here are the relevant log lines from engine.log: 2017-03-16 09:56:23,324Z INFO [org.ovirt.engine.core.bll.MigrateVmCommand] (default task-60) [61a52216] Lock Acquired to object 'EngineLock:{exclusiveLocks='[422663a9-d712-4992-7c81-165b2976073e=<VM, ACTION_TYPE_FAILED_VM_IS_BEING_MIGRATED$VmName entorno127.arsysdesarrollo.lan>]', sharedLocks='null'}' 2017-03-16 09:56:23,957Z INFO [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (default task-60) [61a52216] EVENT_ID: VM_MIGRATION_START_SYSTEM_INITIATED(67), Correlation ID: 61a52216, Job ID: fbc5e0d7-4618-4ca8-b7a7-0fd9a43f490f, Call Stack: null, Custom Event ID: -1, Message: Migration initiated by system (VM: entorno127.arsysdesarrollo.lan, Source: llkk594.arsyslan.es, Destination: llkk593.arsyslan.es, Reason: Host preparing for maintenance). 2017-03-16 09:56:26,818Z INFO [org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] (DefaultQuartzScheduler10) [7c6c403b-0a82-47aa-aeb4-57fbe06e20e1] VM '422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan) was unexpectedly detected as 'MigratingTo' on VDS '43f43ec5-e51d-400d-8569-261c98382e3a'(llkk593.arsyslan.es) (expected on '11a82467-afa4-4e4e-bd92-3383082d0a5e') 2017-03-16 09:56:42,149Z INFO [org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] (DefaultQuartzScheduler10) [fac8ade9-a867-4ff7-aac5-912f78cc3bb5] VM '422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan) was unexpectedly detected as 'MigratingTo' on VDS '43f43ec5-e51d-400d-8569-261c98382e3a'(llkk593.arsyslan.es) (expected on '11a82467-afa4-4e4e-bd92-3383082d0a5e') 2017-03-16 09:56:54,755Z INFO [org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] (DefaultQuartzScheduler3) [54fa9a1b-fddb-4812-b5d2-06cf92834709] VM '422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan) moved from 'MigratingFrom' --> 'Down' 2017-03-16 09:56:54,755Z INFO [org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] (DefaultQuartzScheduler3) [54fa9a1b-fddb-4812-b5d2-06cf92834709] Handing over VM '422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan) to Host '43f43ec5-e51d-400d-8569-261c98382e3a'. Setting VM to status 'MigratingTo' 2017-03-16 09:56:58,160Z INFO [org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] (DefaultQuartzScheduler4) [dd4ea7bb-85bc-410e-9a8f-357c28d85d1c] VM '422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan) is running in db and not running on VDS '43f43ec5-e51d-400d-8569-261c98382e3a'(llkk593.arsyslan.es) 2017-03-16 09:56:58,161Z INFO [org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] (DefaultQuartzScheduler4) [dd4ea7bb-85bc-410e-9a8f-357c28d85d1c] add VM '422663a9-d712-4992-7c81-165b2976073e'(entorno127.arsysdesarrollo.lan) to rerun treatment turn to maintenance while VMs are still running on it.(VM: entorno127.arsysdesarrollo.lan, Source: llkk594.arsyslan.es, Destination: llkk593.arsyslan.es). 2017-03-16 09:56:59,193Z INFO [org.ovirt.engine.core.bll.MigrateVmCommand] (org.ovirt.thread.pool-7-thread-27) [14d40a88] Lock freed to object 'EngineLock:{exclusiveLocks='[422663a9-d712-4992-7c81-165b2976073e=<VM, ACTION_TYPE_FAILED_VM_IS_BEING_MIGRATED$VmName entorno127.arsysdesarrollo.lan>]', sharedLocks='null'}' Now, I understand an VM migration may fail for a number of reasons, but in that case, shouldn't the VM keep running on the source host? I do not quite understand what happened here or how to avoid it in the future. Best regards, -- Eduardo Mayoral Jimeno (emayoral(a)arsys.es) Administrador de sistemas. Departamento de Plataformas. Arsys internet. +34 941 620 145 ext. 5153