Description of problem:

scenario: 

- src & dest (src is SPM - important as we get different behavior)
- vm is running on src
- using web-admin, start migration (sec before - issue the following command on dest)
  * kill -STOP `cat /var/run/vdsm/vdsmd.pid` # this will emulate deadlock in vdsm
- vm status changes to migrating from on web-admin, vdsm reports guest as UP
- issue the migrate cancel command (available on UI) - command will fail: 
  migration not in progress (as guest is reported up)

engine:

2012-03-06 09:58:08,703 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.CancelMigrateVDSCommand] (pool-5-thread-7) [4504f7a] START, CancelMigrateVDSCommand(vdsId = d05ed726-5bd5-11e1-b3d5-0fa1db0ec1ef, vmId=04c8a606-6f3a-4b9c-8167-60cb
1cf18552), log id: 3b287d06
2012-03-06 09:58:08,709 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase] (pool-5-thread-7) [4504f7a] Failed in CancelMigrateVDS method
2012-03-06 09:58:08,710 ERROR [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase] (pool-5-thread-7) [4504f7a] Error code MIGRATION_CANCEL_ERROR and error message VDSGenericException: VDSErrorException: Failed to CancelMigrateV
DS, error = Migration not in progress
2012-03-06 09:58:08,710 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase] (pool-5-thread-7) [4504f7a] Command org.ovirt.engine.core.vdsbroker.vdsbroker.CancelMigrateVDSCommand return value 
 Class Name: org.ovirt.engine.core.vdsbroker.vdsbroker.StatusOnlyReturnForXmlRpc
mStatus                       Class Name: org.ovirt.engine.core.vdsbroker.vdsbroker.StatusForXmlRpc
mCode                         47
mMessage                      Migration not in progress


2012-03-06 09:58:08,711 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.BrokerCommandBase] (pool-5-thread-7) [4504f7a] Vds: nott-vds2.qa.lab.tlv.redhat.com
2012-03-06 09:58:08,711 ERROR [org.ovirt.engine.core.vdsbroker.VDSCommandBase] (pool-5-thread-7) [4504f7a] Command CancelMigrateVDS execution failed. Exception: VDSErrorException: VDSGenericException: VDSErrorException: Failed to Cancel
MigrateVDS, error = Migration not in progress
2012-03-06 09:58:08,711 INFO  [org.ovirt.engine.core.vdsbroker.vdsbroker.CancelMigrateVDSCommand] (pool-5-thread-7) [4504f7a] FINISH, CancelMigrateVDSCommand, log id: 3b287d06
2012-03-06 09:58:08,712 ERROR [org.ovirt.engine.core.bll.CancelMigrateVmCommand] (pool-5-thread-7) [4504f7a] Command org.ovirt.engine.core.bll.CancelMigrateVmCommand throw Vdc Bll exception. With error message VdcBLLException: org.ovirt
.engine.core.vdsbroker.vdsbroker.VDSErrorException: VDSGenericException: VDSErrorException: Failed to CancelMigrateVDS, error = Migration not in progress
2012-03-06 09:58:08,713 ERROR [org.ovirt.engine.core.bll.CancelMigrateVmCommand] (pool-5-thread-7) [4504f7a] Transaction rolled-back for command: org.ovirt.engine.core.bll.CancelMigrateVmCommand.

vdsm:

Thread-625::DEBUG::2012-03-06 09:57:25,981::BindingXMLRPC::848::vds::(wrapper) client [10.35.97.30]::call vmMigrationCancel with ('04c8a606-6f3a-4b9c-8167-60cb1cf18552',) {} flowID [4504f7a]
Thread-625::DEBUG::2012-03-06 09:57:25,983::BindingXMLRPC::854::vds::(wrapper) return vmMigrationCancel with {'status': {'message': 'Migration not in progress', 'code': 47}}