Specifically, it failed to unplug a nic from a VM.
Suspected patches:
https://gerrit.ovirt.org/#/c/91195/
Link to Job:
https://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/8019/
Link to all logs:
(Relevant) error snippet from the log:
<error>
2018-06-03 06:35:30,764-04 INFO [org.ovirt.engine.core.vdsbroker.vdsbroker.HotUnplugNicVDSCommand] (default task-1) [32c965fd] FINISH, HotUnplugNicVDSCommand, return: , log id: 18d9b4e9
2018-06-03 06:35:30,764-04 DEBUG [org.ovirt.engine.core.common.di.interceptor.DebugLoggingInterceptor] (default task-1) [32c965fd] method: runVdsCommand, params: [HotUnplugNic, VmNicDeviceVDSParameters:{hostId='d0f5b521-ed04-4b9e-9524-7f8d4be842d0', vm.vm_name='vm0', nic='VmNic:{id='9419aca6-2fae-4851-a902-a6b5a88ac691', vnicProfileId='8d12fcbb-23e8-432d-845a-ab2b97039955', speed='10000', type='3', macAddress='00:1a:4a:16:01:0e', linked='true', vmId='ec4303e9-2b7a-451d-9f43-836c29767652', vmTemplateId='null'}', vmDevice='VmDevice:{id='VmDeviceId:{deviceId='9419aca6-2fae-4851-a902-a6b5a88ac691', vmId='ec4303e9-2b7a-451d-9f43-836c29767652'}', device='bridge', type='INTERFACE', specParams='[]', address='', managed='true', plugged='true', readOnly='false', deviceAlias='', customProperties='[]', snapshotId='null', logicalName='null', hostDevice='null'}'}], timeElapsed: 55ms
2018-06-03 06:35:30,765-04 ERROR [org.ovirt.engine.core.bll.network.vm.ActivateDeactivateVmNicCommand] (default task-1) [32c965fd] Command 'org.ovirt.engine.core.bll.network.vm.ActivateDeactivateVmNicCommand' failed: EngineException: org.ovirt.engine.core.vdsbroker.vdsbroker.VDSErrorException: VDSGenericException: VDSErrorException: Failed to HotUnplugNicVDS, error = General Exception: ('macAddr',), code = 100 (Failed with error GeneralException and code 100)
2018-06-03 06:35:30,774-04 DEBUG [org.ovirt.engine.core.common.di.interceptor.DebugLoggingInterceptor] (default task-1) [32c965fd] method: get, params: [d0f5b521-ed04-4b9e-9524-7f8d4be842d0], timeElapsed: 3ms
2018-06-03 06:35:30,781-04 DEBUG [org.ovirt.engine.core.utils.timer.FixedDelayJobListener] (DefaultQuartzScheduler5) [] Rescheduling DEFAULT.org.ovirt.engine.core.bll.gluster.GlusterSyncJob.refreshLightWeightData#-9223372036854775795 as there is no unfired trigger.
2018-06-03 06:35:30,781-04 DEBUG [org.ovirt.engine.core.utils.timer.FixedDelayJobListener] (DefaultQuartzScheduler6) [] Rescheduling DEFAULT.org.ovirt.engine.core.bll.gluster.GlusterServiceSyncJob.refreshGlusterServices#-9223372036854775801 as there is no unfired trigger.
2018-06-03 06:35:30,782-04 ERROR [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (default task-1) [32c965fd] EVENT_ID: NETWORK_DEACTIVATE_VM_INTERFACE_FAILURE(1,015), Failed to unplug Network Interface eth2 (VirtIO) from VM vm0. (User: admin@internal-authz)
2018-06-03 06:35:30,791-04 DEBUG [org.ovirt.engine.core.dal.dbbroker.PostgresDbEngineDialect$PostgresSimpleJdbcCall] (default task-1) [32c965fd] Compiled stored procedure. Call string i</error>