Hi all,
I discovered yesterday a problem when migrating VM with more than one vdisk.
On our test servers (oVirt4.1, shared storage with Gluster), I created 2 VMs 
needed for a test, from a template with a 20G vdisk. On this VMs I added a 100G 
vdisk (for this tests I didn't want to waste time to extend the existing 
vdisks... But I lost time finally...). The VMs with the 2 vdisks works well.
Now I saw some updates waiting on the host. I tried to put it in maintenance... 
But it stopped on the two VM. They were marked "migrating", but no more 
accessible. Other (small) VMs with only 1 vdisk was migrated without problem at 
the same time.
I saw that a kvm process for the (big) VMs was launched on the source AND 
destination host, but after tens of minutes, the migration and the VMs was 
always freezed. I tried to cancel the migration for the VMs : failed. The only 
way to stop it was to poweroff the VMs : the kvm process died on the 2 hosts 
and the GUI alerted on a failed migration.
In doubt, I tried to delete the second vdisk on one of this VMs : it migrates 
then without error ! And no access problem.
I tried to extend the first vdisk of the second VM, the delete the second vdisk 
: it migrates now without problem !   

So after another test with a VM with 2 vdisks, I can say that this blocked the 
migration process :(

In engine.log, for a VMs with 1 vdisk migrating well, we see :2018-02-12 
16:46:29,705+01 INFO  [org.ovirt.engine.core.bll.MigrateVmToServerCommand] 
(default task-28) [2f712024-5982-46a8-82c8-fd8293da5725] Lock Acquired to 
object 'EngineLock:{exclusiveLocks='[3f57e669-5e4c-4d10-85cc-d573004a099d=VM]', 
sharedLocks=''}'
2018-02-12 16:46:29,955+01 INFO  
[org.ovirt.engine.core.bll.MigrateVmToServerCommand] 
(org.ovirt.thread.pool-6-thread-32) [2f712024-5982-46a8-82c8-fd8293da5725] 
Running command: MigrateVmToServerCommand internal: false. Entities affected :  
ID: 3f57e669-5e4c-4d10-85cc-d573004a099d Type: VMAction group MIGRATE_VM with 
role type USER
2018-02-12 16:46:30,261+01 INFO  
[org.ovirt.engine.core.vdsbroker.MigrateVDSCommand] 
(org.ovirt.thread.pool-6-thread-32) [2f712024-5982-46a8-82c8-fd8293da5725] 
START, MigrateVDSCommand( MigrateVDSCommandParameters:{runAsync='true', 
hostId='ce3938b1-b23f-4d22-840a-f17d7cd87bb1', 
vmId='3f57e669-5e4c-4d10-85cc-d573004a099d', srcHost='192.168.0.6', 
dstVdsId='d569c2dd-8f30-4878-8aea-858db285cf69', dstHost='192.168.0.5:54321', 
migrationMethod='ONLINE', tunnelMigration='false', migrationDowntime='0', 
autoConverge='true', migrateCompressed='false', consoleAddress='null', 
maxBandwidth='500', enableGuestEvents='true', maxIncomingMigrations='2', 
maxOutgoingMigrations='2', convergenceSchedule='[init=[{name=setDowntime, 
params=[100]}], stalling=[{limit=1, action={name=setDowntime, params=[150]}}, 
{limit=2, action={name=setDowntime, params=[200]}}, {limit=3, 
action={name=setDowntime, params=[300]}}, {limit=4, action={name=setDowntime, 
params=[400]}}, {limit=6, action={name=setDowntime, params=[500]}}, {limit=-1, 
action={name=abort, params=[]}}]]'}), log id: 14f61ee0
2018-02-12 16:46:30,262+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateBrokerVDSCommand] 
(org.ovirt.thread.pool-6-thread-32) [2f712024-5982-46a8-82c8-fd8293da5725] 
START, MigrateBrokerVDSCommand(HostName = victor.local.systea.fr, 
MigrateVDSCommandParameters:{runAsync='true', 
hostId='ce3938b1-b23f-4d22-840a-f17d7cd87bb1', 
vmId='3f57e669-5e4c-4d10-85cc-d573004a099d', srcHost='192.168.0.6', 
dstVdsId='d569c2dd-8f30-4878-8aea-858db285cf69', dstHost='192.168.0.5:54321', 
migrationMethod='ONLINE', tunnelMigration='false', migrationDowntime='0', 
autoConverge='true', migrateCompressed='false', consoleAddress='null', 
maxBandwidth='500', enableGuestEvents='true', maxIncomingMigrations='2', 
maxOutgoingMigrations='2', convergenceSchedule='[init=[{name=setDowntime, 
params=[100]}], stalling=[{limit=1, action={name=setDowntime, params=[150]}}, 
{limit=2, action={name=setDowntime, params=[200]}}, {limit=3, 
action={name=setDowntime, params=[300]}}, {limit=4, action={name=setDowntime, 
params=[400]}}, {limit=6, action={name=setDowntime, params=[500]}}, {limit=-1, 
action={name=abort, params=[]}}]]'}), log id: 775cd381
2018-02-12 16:46:30,277+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateBrokerVDSCommand] 
(org.ovirt.thread.pool-6-thread-32) [2f712024-5982-46a8-82c8-fd8293da5725] 
FINISH, MigrateBrokerVDSCommand, log id: 775cd381
2018-02-12 16:46:30,285+01 INFO  
[org.ovirt.engine.core.vdsbroker.MigrateVDSCommand] 
(org.ovirt.thread.pool-6-thread-32) [2f712024-5982-46a8-82c8-fd8293da5725] 
FINISH, MigrateVDSCommand, return: MigratingFrom, log id: 14f61ee0
2018-02-12 16:46:30,301+01 INFO  
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] 
(org.ovirt.thread.pool-6-thread-32) [2f712024-5982-46a8-82c8-fd8293da5725] 
EVENT_ID: VM_MIGRATION_START(62), Correlation ID: 
2f712024-5982-46a8-82c8-fd8293da5725, Job ID: 
4bd19aa9-cc99-4d02-884e-5a1e857a7738, Call Stack: null, Custom ID: null, Custom 
Event ID: -1, Message: Migration started (VM: Oracle_SECONDARY, Source: 
victor.local.systea.fr, Destination: ginger.local.systea.fr, User: 
admin@internal-authz).
2018-02-12 16:46:31,106+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.FullListVDSCommand] 
(DefaultQuartzScheduler9) [54a65b66] START, FullListVDSCommand(HostName = 
victor.local.systea.fr, FullListVDSCommandParameters:{runAsync='true', 
hostId='ce3938b1-b23f-4d22-840a-f17d7cd87bb1', 
vmIds='[3f57e669-5e4c-4d10-85cc-d573004a099d]'}), log id: 54b4b435
2018-02-12 16:46:31,147+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.FullListVDSCommand] 
(DefaultQuartzScheduler9) [54a65b66] FINISH, FullListVDSCommand, return: 
[{acpiEnable=true, emulatedMachine=pc-i440fx-rhel7.3.0, tabletEnable=true, 
pid=1493, 
guestDiskMapping={0QEMU_QEMU_HARDDISK_d890fa68-fba4-4f49-9={name=/dev/sda}, 
QEMU_DVD-ROM_QM00003={name=/dev/sr0}}, transparentHugePages=true, timeOffset=0, 
cpuType=Nehalem, smp=2, pauseCode=NOERR, 
guestNumaNodes=[Ljava.lang.Object;@1d9042cd, smartcardEnable=false, 
custom={device_fbddd528-7d93-49c6-a286-180e021cb274device_879c93ab-4df1-435c-af02-565039fcc254=VmDevice:{id='VmDeviceId:{deviceId='879c93ab-4df1-435c-af02-565039fcc254',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='unix', type='CHANNEL', 
bootOrder='0', specParams='[]', address='{bus=0, controller=0, 
type=virtio-serial, port=1}', managed='false', plugged='true', 
readOnly='false', deviceAlias='channel0', customProperties='[]', 
snapshotId='null', logicalName='null', hostDevice='null'}, 
device_fbddd528-7d93-49c6-a286-180e021cb274device_879c93ab-4df1-435c-af02-565039fcc254device_8945f61a-abbe-4156-8485-a4aa6f1908dbdevice_017b5e59-01c4-4aac-bf0c-b5d9557284d6=VmDevice:{id='VmDeviceId:{deviceId='017b5e59-01c4-4aac-bf0c-b5d9557284d6',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='tablet', 
type='UNKNOWN', bootOrder='0', specParams='[]', address='{bus=0, type=usb, 
port=1}', managed='false', plugged='true', readOnly='false', 
deviceAlias='input0', customProperties='[]', snapshotId='null', 
logicalName='null', hostDevice='null'}, 
device_fbddd528-7d93-49c6-a286-180e021cb274=VmDevice:{id='VmDeviceId:{deviceId='fbddd528-7d93-49c6-a286-180e021cb274',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='ide', 
type='CONTROLLER', bootOrder='0', specParams='[]', address='{slot=0x01, 
bus=0x00, domain=0x0000, type=pci, function=0x1}', managed='false', 
plugged='true', readOnly='false', deviceAlias='ide', customProperties='[]', 
snapshotId='null', logicalName='null', hostDevice='null'}, 
device_fbddd528-7d93-49c6-a286-180e021cb274device_879c93ab-4df1-435c-af02-565039fcc254device_8945f61a-abbe-4156-8485-a4aa6f1908db=VmDevice:{id='VmDeviceId:{deviceId='8945f61a-abbe-4156-8485-a4aa6f1908db',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='unix', type='CHANNEL', 
bootOrder='0', specParams='[]', address='{bus=0, controller=0, 
type=virtio-serial, port=2}', managed='false', plugged='true', 
readOnly='false', deviceAlias='channel1', customProperties='[]', 
snapshotId='null', logicalName='null', hostDevice='null'}}, vmType=kvm, 
memSize=8192, smpCoresPerSocket=1, vmName=Oracle_SECONDARY, nice=0, 
status=Migration Source, maxMemSize=32768, bootMenuEnable=false, 
vmId=3f57e669-5e4c-4d10-85cc-d573004a099d, numOfIoThreads=2, 
smpThreadsPerCore=1, memGuaranteedSize=8192, kvmEnable=true, 
pitReinjection=false, displayNetwork=ovirtmgmt, 
devices=[Ljava.lang.Object;@28ae66d7, display=vnc, maxVCpus=16, clientIp=, 
statusTime=4299484520, maxMemSlots=16}], log id: 54b4b435
2018-02-12 16:46:31,150+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmsStatisticsFetcher] 
(DefaultQuartzScheduler1) [27fac647] Fetched 3 VMs from VDS 
'd569c2dd-8f30-4878-8aea-858db285cf69'
2018-02-12 16:46:31,151+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmDevicesMonitoring] 
(DefaultQuartzScheduler9) [54a65b66] Received a vnc Device without an address 
when processing VM 3f57e669-5e4c-4d10-85cc-d573004a099d devices, skipping 
device: {device=vnc, specParams={displayNetwork=ovirtmgmt, keyMap=fr, 
displayIp=192.168.0.6}, type=graphics, 
deviceId=813957b1-446a-4e88-9e40-9fe76d2c442d, port=5901}
2018-02-12 16:46:31,151+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmDevicesMonitoring] 
(DefaultQuartzScheduler9) [54a65b66] Received a lease Device without an address 
when processing VM 3f57e669-5e4c-4d10-85cc-d573004a099d devices, skipping 
device: {lease_id=3f57e669-5e4c-4d10-85cc-d573004a099d, 
sd_id=1e51cecc-eb2e-47d0-b185-920fdc7afa16, 
deviceId={uuid=a09949aa-5642-4b6d-94a4-8b0d04257be5}, offset=6291456, 
device=lease, 
path=/rhev/data-center/mnt/glusterSD/192.168.0.6:_DATA01/1e51cecc-eb2e-47d0-b185-920fdc7afa16/dom_md/xleases,
 type=lease}
2018-02-12 16:46:31,152+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(DefaultQuartzScheduler1) [27fac647] VM 
'3f57e669-5e4c-4d10-85cc-d573004a099d'(Oracle_SECONDARY) was unexpectedly 
detected as 'MigratingTo' on VDS 
'd569c2dd-8f30-4878-8aea-858db285cf69'(ginger.local.systea.fr) (expected on 
'ce3938b1-b23f-4d22-840a-f17d7cd87bb1')
2018-02-12 16:46:31,152+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(DefaultQuartzScheduler1) [27fac647] VM '3f57e669-5e4c-4d10-85cc-d573004a099d' 
is migrating to VDS 
'd569c2dd-8f30-4878-8aea-858db285cf69'(ginger.local.systea.fr) ignoring it in 
the refresh until migration is done
....
2018-02-12 16:46:41,631+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(ForkJoinPool-1-worker-11) [] VM '3f57e669-5e4c-4d10-85cc-d573004a099d' was 
reported as Down on VDS 
'ce3938b1-b23f-4d22-840a-f17d7cd87bb1'(victor.local.systea.fr)
2018-02-12 16:46:41,632+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.DestroyVDSCommand] 
(ForkJoinPool-1-worker-11) [] START, DestroyVDSCommand(HostName = 
victor.local.systea.fr, DestroyVmVDSCommandParameters:{runAsync='true', 
hostId='ce3938b1-b23f-4d22-840a-f17d7cd87bb1', 
vmId='3f57e669-5e4c-4d10-85cc-d573004a099d', force='false', secondsToWait='0', 
gracefully='false', reason='', ignoreNoVm='true'}), log id: 560eca57
2018-02-12 16:46:41,650+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.DestroyVDSCommand] 
(ForkJoinPool-1-worker-11) [] FINISH, DestroyVDSCommand, log id: 560eca57
2018-02-12 16:46:41,650+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(ForkJoinPool-1-worker-11) [] VM 
'3f57e669-5e4c-4d10-85cc-d573004a099d'(Oracle_SECONDARY) moved from 
'MigratingFrom' --> 'Down'
2018-02-12 16:46:41,651+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(ForkJoinPool-1-worker-11) [] Handing over VM 
'3f57e669-5e4c-4d10-85cc-d573004a099d'(Oracle_SECONDARY) to Host 
'd569c2dd-8f30-4878-8aea-858db285cf69'. Setting VM to status 'MigratingTo'
2018-02-12 16:46:42,163+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(ForkJoinPool-1-worker-4) [] VM 
'3f57e669-5e4c-4d10-85cc-d573004a099d'(Oracle_SECONDARY) moved from 
'MigratingTo' --> 'Up'
2018-02-12 16:46:42,169+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateStatusVDSCommand] 
(ForkJoinPool-1-worker-4) [] START, MigrateStatusVDSCommand(HostName = 
ginger.local.systea.fr, MigrateStatusVDSCommandParameters:{runAsync='true', 
hostId='d569c2dd-8f30-4878-8aea-858db285cf69', 
vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}), log id: 7a25c281
2018-02-12 16:46:42,174+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateStatusVDSCommand] 
(ForkJoinPool-1-worker-4) [] FINISH, MigrateStatusVDSCommand, log id: 7a25c281
2018-02-12 16:46:42,194+01 INFO  
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] 
(ForkJoinPool-1-worker-4) [] EVENT_ID: VM_MIGRATION_DONE(63), Correlation ID: 
2f712024-5982-46a8-82c8-fd8293da5725, Job ID: 
4bd19aa9-cc99-4d02-884e-5a1e857a7738, Call Stack: null, Custom ID: null, Custom 
Event ID: -1, Message: Migration completed (VM: Oracle_SECONDARY, Source: 
victor.local.systea.fr, Destination: ginger.local.systea.fr, Duration: 11 
seconds, Total: 11 seconds, Actual downtime: (N/A))
2018-02-12 16:46:42,201+01 INFO  
[org.ovirt.engine.core.bll.MigrateVmToServerCommand] (ForkJoinPool-1-worker-4) 
[] Lock freed to object 
'EngineLock:{exclusiveLocks='[3f57e669-5e4c-4d10-85cc-d573004a099d=VM]', 
sharedLocks=''}'
2018-02-12 16:46:42,203+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.FullListVDSCommand] 
(ForkJoinPool-1-worker-4) [] START, FullListVDSCommand(HostName = 
ginger.local.systea.fr, FullListVDSCommandParameters:{runAsync='true', 
hostId='d569c2dd-8f30-4878-8aea-858db285cf69', 
vmIds='[3f57e669-5e4c-4d10-85cc-d573004a099d]'}), log id: 7cc65298
2018-02-12 16:46:42,254+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.FullListVDSCommand] 
(ForkJoinPool-1-worker-4) [] FINISH, FullListVDSCommand, return: 
[{acpiEnable=true, emulatedMachine=pc-i440fx-rhel7.3.0, afterMigrationStatus=, 
tabletEnable=true, pid=18748, guestDiskMapping={}, transparentHugePages=true, 
timeOffset=0, cpuType=Nehalem, smp=2, 
guestNumaNodes=[Ljava.lang.Object;@760085fd, 
custom={device_fbddd528-7d93-49c6-a286-180e021cb274device_879c93ab-4df1-435c-af02-565039fcc254=VmDevice:{id='VmDeviceId:{deviceId='879c93ab-4df1-435c-af02-565039fcc254',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='unix', type='CHANNEL', 
bootOrder='0', specParams='[]', address='{bus=0, controller=0, 
type=virtio-serial, port=1}', managed='false', plugged='true', 
readOnly='false', deviceAlias='channel0', customProperties='[]', 
snapshotId='null', logicalName='null', hostDevice='null'}, 
device_fbddd528-7d93-49c6-a286-180e021cb274device_879c93ab-4df1-435c-af02-565039fcc254device_8945f61a-abbe-4156-8485-a4aa6f1908dbdevice_017b5e59-01c4-4aac-bf0c-b5d9557284d6=VmDevice:{id='VmDeviceId:{deviceId='017b5e59-01c4-4aac-bf0c-b5d9557284d6',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='tablet', 
type='UNKNOWN', bootOrder='0', specParams='[]', address='{bus=0, type=usb, 
port=1}', managed='false', plugged='true', readOnly='false', 
deviceAlias='input0', customProperties='[]', snapshotId='null', 
logicalName='null', hostDevice='null'}, 
device_fbddd528-7d93-49c6-a286-180e021cb274=VmDevice:{id='VmDeviceId:{deviceId='fbddd528-7d93-49c6-a286-180e021cb274',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='ide', 
type='CONTROLLER', bootOrder='0', specParams='[]', address='{slot=0x01, 
bus=0x00, domain=0x0000, type=pci, function=0x1}', managed='false', 
plugged='true', readOnly='false', deviceAlias='ide', customProperties='[]', 
snapshotId='null', logicalName='null', hostDevice='null'}, 
device_fbddd528-7d93-49c6-a286-180e021cb274device_879c93ab-4df1-435c-af02-565039fcc254device_8945f61a-abbe-4156-8485-a4aa6f1908db=VmDevice:{id='VmDeviceId:{deviceId='8945f61a-abbe-4156-8485-a4aa6f1908db',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='unix', type='CHANNEL', 
bootOrder='0', specParams='[]', address='{bus=0, controller=0, 
type=virtio-serial, port=2}', managed='false', plugged='true', 
readOnly='false', deviceAlias='channel1', customProperties='[]', 
snapshotId='null', logicalName='null', hostDevice='null'}}, vmType=kvm, 
memSize=8192, smpCoresPerSocket=1, vmName=Oracle_SECONDARY, nice=0, status=Up, 
maxMemSize=32768, bootMenuEnable=false, 
vmId=3f57e669-5e4c-4d10-85cc-d573004a099d, numOfIoThreads=2, 
smpThreadsPerCore=1, smartcardEnable=false, maxMemSlots=16, kvmEnable=true, 
pitReinjection=false, displayNetwork=ovirtmgmt, 
devices=[Ljava.lang.Object;@2e4d3dd3, memGuaranteedSize=8192, maxVCpus=16, 
clientIp=, statusTime=4304259600, display=vnc}], log id: 7cc65298
2018-02-12 16:46:42,257+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmDevicesMonitoring] 
(ForkJoinPool-1-worker-4) [] Received a vnc Device without an address when 
processing VM 3f57e669-5e4c-4d10-85cc-d573004a099d devices, skipping device: 
{device=vnc, specParams={displayNetwork=ovirtmgmt, keyMap=fr, 
displayIp=192.168.0.5}, type=graphics, 
deviceId=813957b1-446a-4e88-9e40-9fe76d2c442d, port=5901}
2018-02-12 16:46:42,257+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmDevicesMonitoring] 
(ForkJoinPool-1-worker-4) [] Received a lease Device without an address when 
processing VM 3f57e669-5e4c-4d10-85cc-d573004a099d devices, skipping device: 
{lease_id=3f57e669-5e4c-4d10-85cc-d573004a099d, 
sd_id=1e51cecc-eb2e-47d0-b185-920fdc7afa16, 
deviceId={uuid=a09949aa-5642-4b6d-94a4-8b0d04257be5}, offset=6291456, 
device=lease, 
path=/rhev/data-center/mnt/glusterSD/192.168.0.6:_DATA01/1e51cecc-eb2e-47d0-b185-920fdc7afa16/dom_md/xleases,
 type=lease}
2018-02-12 16:46:46,260+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.FullListVDSCommand] 
(DefaultQuartzScheduler5) [7fcb200a] FINISH, FullListVDSCommand, return: 
[{acpiEnable=true, emulatedMachine=pc-i440fx-rhel7.3.0, afterMigrationStatus=, 
tabletEnable=true, pid=18748, 
guestDiskMapping={0QEMU_QEMU_HARDDISK_d890fa68-fba4-4f49-9={name=/dev/sda}, 
QEMU_DVD-ROM_QM00003={name=/dev/sr0}}, transparentHugePages=true, timeOffset=0, 
cpuType=Nehalem, smp=2, guestNumaNodes=[Ljava.lang.Object;@77951faf, 
custom={device_fbddd528-7d93-49c6-a286-180e021cb274device_879c93ab-4df1-435c-af02-565039fcc254=VmDevice:{id='VmDeviceId:{deviceId='879c93ab-4df1-435c-af02-565039fcc254',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='unix', type='CHANNEL', 
bootOrder='0', specParams='[]', address='{bus=0, controller=0, 
type=virtio-serial, port=1}', managed='false', plugged='true', 
readOnly='false', deviceAlias='channel0', customProperties='[]', 
snapshotId='null', logicalName='null', hostDevice='null'}, 
device_fbddd528-7d93-49c6-a286-180e021cb274device_879c93ab-4df1-435c-af02-565039fcc254device_8945f61a-abbe-4156-8485-a4aa6f1908dbdevice_017b5e59-01c4-4aac-bf0c-b5d9557284d6=VmDevice:{id='VmDeviceId:{deviceId='017b5e59-01c4-4aac-bf0c-b5d9557284d6',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='tablet', 
type='UNKNOWN', bootOrder='0', specParams='[]', address='{bus=0, type=usb, 
port=1}', managed='false', plugged='true', readOnly='false', 
deviceAlias='input0', customProperties='[]', snapshotId='null', 
logicalName='null', hostDevice='null'}, 
device_fbddd528-7d93-49c6-a286-180e021cb274=VmDevice:{id='VmDeviceId:{deviceId='fbddd528-7d93-49c6-a286-180e021cb274',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='ide', 
type='CONTROLLER', bootOrder='0', specParams='[]', address='{slot=0x01, 
bus=0x00, domain=0x0000, type=pci, function=0x1}', managed='false', 
plugged='true', readOnly='false', deviceAlias='ide', customProperties='[]', 
snapshotId='null', logicalName='null', hostDevice='null'}, 
device_fbddd528-7d93-49c6-a286-180e021cb274device_879c93ab-4df1-435c-af02-565039fcc254device_8945f61a-abbe-4156-8485-a4aa6f1908db=VmDevice:{id='VmDeviceId:{deviceId='8945f61a-abbe-4156-8485-a4aa6f1908db',
 vmId='3f57e669-5e4c-4d10-85cc-d573004a099d'}', device='unix', type='CHANNEL', 
bootOrder='0', specParams='[]', address='{bus=0, controller=0, 
type=virtio-serial, port=2}', managed='false', plugged='true', 
readOnly='false', deviceAlias='channel1', customProperties='[]', 
snapshotId='null', logicalName='null', hostDevice='null'}}, vmType=kvm, 
memSize=8192, smpCoresPerSocket=1, vmName=Oracle_SECONDARY, nice=0, status=Up, 
maxMemSize=32768, bootMenuEnable=false, 
vmId=3f57e669-5e4c-4d10-85cc-d573004a099d, numOfIoThreads=2, 
smpThreadsPerCore=1, smartcardEnable=false, maxMemSlots=16, kvmEnable=true, 
pitReinjection=false, displayNetwork=ovirtmgmt, 
devices=[Ljava.lang.Object;@286410fd, memGuaranteedSize=8192, maxVCpus=16, 
clientIp=, statusTime=4304263620, display=vnc}], log id: 58cdef4c
2018-02-12 16:46:46,267+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmDevicesMonitoring] 
(DefaultQuartzScheduler5) [7fcb200a] Received a vnc Device without an address 
when processing VM 3f57e669-5e4c-4d10-85cc-d573004a099d devices, skipping 
device: {device=vnc, specParams={displayNetwork=ovirtmgmt, keyMap=fr, 
displayIp=192.168.0.5}, type=graphics, 
deviceId=813957b1-446a-4e88-9e40-9fe76d2c442d, port=5901}
2018-02-12 16:46:46,268+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmDevicesMonitoring] 
(DefaultQuartzScheduler5) [7fcb200a] Received a lease Device without an address 
when processing VM 3f57e669-5e4c-4d10-85cc-d573004a099d devices, skipping 
device: {lease_id=3f57e669-5e4c-4d10-85cc-d573004a099d, 
sd_id=1e51cecc-eb2e-47d0-b185-920fdc7afa16, 
deviceId={uuid=a09949aa-5642-4b6d-94a4-8b0d04257be5}, offset=6291456, 
device=lease, 
path=/rhev/data-center/mnt/glusterSD/192.168.0.6:_DATA01/1e51cecc-eb2e-47d0-b185-920fdc7afa16/dom_md/xleases,
 type=lease}
 
For the VM with 2 vdisks we see :
2018-02-12 16:49:06,112+01 INFO  
[org.ovirt.engine.core.bll.MigrateVmToServerCommand] (default task-50) 
[92b5af33-cb87-4142-b8fe-8b838dd7458e] Lock Acquired to object 
'EngineLock:{exclusiveLocks='[f7d4ec12-627a-4b83-b59e-886400d55474=VM]', 
sharedLocks=''}'
2018-02-12 16:49:06,407+01 INFO  
[org.ovirt.engine.core.bll.MigrateVmToServerCommand] 
(org.ovirt.thread.pool-6-thread-49) [92b5af33-cb87-4142-b8fe-8b838dd7458e] 
Running command: MigrateVmToServerCommand internal: false. Entities affected :  
ID: f7d4ec12-627a-4b83-b59e-886400d55474 Type: VMAction group MIGRATE_VM with 
role type USER
2018-02-12 16:49:06,712+01 INFO  
[org.ovirt.engine.core.vdsbroker.MigrateVDSCommand] 
(org.ovirt.thread.pool-6-thread-49) [92b5af33-cb87-4142-b8fe-8b838dd7458e] 
START, MigrateVDSCommand( MigrateVDSCommandParameters:{runAsync='true', 
hostId='d569c2dd-8f30-4878-8aea-858db285cf69', 
vmId='f7d4ec12-627a-4b83-b59e-886400d55474', srcHost='192.168.0.5', 
dstVdsId='ce3938b1-b23f-4d22-840a-f17d7cd87bb1', dstHost='192.168.0.6:54321', 
migrationMethod='ONLINE', tunnelMigration='false', migrationDowntime='0', 
autoConverge='true', migrateCompressed='false', consoleAddress='null', 
maxBandwidth='500', enableGuestEvents='true', maxIncomingMigrations='2', 
maxOutgoingMigrations='2', convergenceSchedule='[init=[{name=setDowntime, 
params=[100]}], stalling=[{limit=1, action={name=setDowntime, params=[150]}}, 
{limit=2, action={name=setDowntime, params=[200]}}, {limit=3, 
action={name=setDowntime, params=[300]}}, {limit=4, action={name=setDowntime, 
params=[400]}}, {limit=6, action={name=setDowntime, params=[500]}}, {limit=-1, 
action={name=abort, params=[]}}]]'}), log id: 3702a9e0
2018-02-12 16:49:06,713+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateBrokerVDSCommand] 
(org.ovirt.thread.pool-6-thread-49) [92b5af33-cb87-4142-b8fe-8b838dd7458e] 
START, MigrateBrokerVDSCommand(HostName = ginger.local.systea.fr, 
MigrateVDSCommandParameters:{runAsync='true', 
hostId='d569c2dd-8f30-4878-8aea-858db285cf69', 
vmId='f7d4ec12-627a-4b83-b59e-886400d55474', srcHost='192.168.0.5', 
dstVdsId='ce3938b1-b23f-4d22-840a-f17d7cd87bb1', dstHost='192.168.0.6:54321', 
migrationMethod='ONLINE', tunnelMigration='false', migrationDowntime='0', 
autoConverge='true', migrateCompressed='false', consoleAddress='null', 
maxBandwidth='500', enableGuestEvents='true', maxIncomingMigrations='2', 
maxOutgoingMigrations='2', convergenceSchedule='[init=[{name=setDowntime, 
params=[100]}], stalling=[{limit=1, action={name=setDowntime, params=[150]}}, 
{limit=2, action={name=setDowntime, params=[200]}}, {limit=3, 
action={name=setDowntime, params=[300]}}, {limit=4, action={name=setDowntime, 
params=[400]}}, {limit=6, action={name=setDowntime, params=[500]}}, {limit=-1, 
action={name=abort, params=[]}}]]'}), log id: 1840069c
2018-02-12 16:49:06,724+01 INFO  
[org.ovirt.engine.core.vdsbroker.vdsbroker.MigrateBrokerVDSCommand] 
(org.ovirt.thread.pool-6-thread-49) [92b5af33-cb87-4142-b8fe-8b838dd7458e] 
FINISH, MigrateBrokerVDSCommand, log id: 1840069c
2018-02-12 16:49:06,732+01 INFO  
[org.ovirt.engine.core.vdsbroker.MigrateVDSCommand] 
(org.ovirt.thread.pool-6-thread-49) [92b5af33-cb87-4142-b8fe-8b838dd7458e] 
FINISH, MigrateVDSCommand, return: MigratingFrom, log id: 3702a9e0
2018-02-12 16:49:06,753+01 INFO  
[org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] 
(org.ovirt.thread.pool-6-thread-49) [92b5af33-cb87-4142-b8fe-8b838dd7458e] 
EVENT_ID: VM_MIGRATION_START(62), Correlation ID: 
92b5af33-cb87-4142-b8fe-8b838dd7458e, Job ID: 
f4f54054-f7c8-4481-8eda-d5a15c383061, Call Stack: null, Custom ID: null, Custom 
Event ID: -1, Message: Migration started (VM: Oracle_PRIMARY, Source: 
ginger.local.systea.fr, Destination: victor.local.systea.fr, User: 
admin@internal-authz).
...
2018-02-12 16:49:16,453+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmsStatisticsFetcher] 
(DefaultQuartzScheduler4) [162a5bc3] Fetched 2 VMs from VDS 
'ce3938b1-b23f-4d22-840a-f17d7cd87bb1'
2018-02-12 16:49:16,455+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(DefaultQuartzScheduler4) [162a5bc3] VM 
'f7d4ec12-627a-4b83-b59e-886400d55474'(Oracle_PRIMARY) was unexpectedly 
detected as 'MigratingTo' on VDS 
'ce3938b1-b23f-4d22-840a-f17d7cd87bb1'(victor.local.systea.fr) (expected on 
'd569c2dd-8f30-4878-8aea-858db285cf69')
2018-02-12 16:49:16,455+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(DefaultQuartzScheduler4) [162a5bc3] VM 'f7d4ec12-627a-4b83-b59e-886400d55474' 
is migrating to VDS 
'ce3938b1-b23f-4d22-840a-f17d7cd87bb1'(victor.local.systea.fr) ignoring it in 
the refresh until migration is done
...
2018-02-12 16:49:31,484+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(DefaultQuartzScheduler5) [11a7619a] VM 
'f7d4ec12-627a-4b83-b59e-886400d55474'(Oracle_PRIMARY) was unexpectedly 
detected as 'MigratingTo' on VDS 
'ce3938b1-b23f-4d22-840a-f17d7cd87bb1'(victor.local.systea.fr) (expected on 
'd569c2dd-8f30-4878-8aea-858db285cf69')
2018-02-12 16:49:31,484+01 INFO  
[org.ovirt.engine.core.vdsbroker.monitoring.VmAnalyzer] 
(DefaultQuartzScheduler5) [11a7619a] VM 'f7d4ec12-627a-4b83-b59e-886400d55474' 
is migrating to VDS 
'ce3938b1-b23f-4d22-840a-f17d7cd87bb1'(victor.local.systea.fr) ignoring it in 
the refresh until migration is done
 
and so on, last lines repeated indefinitly for hours since we poweroff the VM...
Is this something known ? Any idea about that ?

Thanks

Ovirt 4.1.6, updated last at feb-13. Gluster 3.12.1.

--

Cordialement,

Frank Soyer
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