----- Original Message -----
> From: "Shu Ming" <shum...@linux.vnet.ibm.com>
> To: "VDSM Project Development" <vdsm-devel@lists.fedorahosted.org>
> Sent: Wednesday, July 25, 2012 5:57:05 PM
> Subject: [vdsm] Fatal error when migrate the VM with disk on iscsi data       
> center
> 
> 
> Hi,
> 
> I am testing the VM migration in oVirt engine 3.1 bteta release and
> successfully did the migration test on NFS date center. However, the
> test of VM migration on iSCSI data center failed.
> I dumped the error and warning segments from the vdsm logs on both
> the source and destination host. Please ignore the time stamp out of
> sync between the two hosts.
> 
> The vdsm log segment from the source host:
> 
> 66-4da5-8310-6dcc970e5367`::migration downtime thread exiting
> Thread-115166::ERROR::2012-07-25
> 23:18:55,953::vm::176::vm.Vm::(_recover)
> vmId=`11e06222-2d66-4da5-8310-6dcc970e5367`::operation failed:
> Failed to connect to remote libvirt URI
> qemu+tcp://9.181.129.110/system
> Dummy-115148::DEBUG::2012-07-25
> 23:18:55,981::__init__::1249::Storage.Misc.excCmd::(_log) 'dd
> if=/rhev/data-center/0b9a4ea4-d487-11e1-b614-5254001498c4/mastersd/dom_md/inbox
> iflag=direct,fullblock count=1 bs=1024000' (cwd None)
> Thread-115166::ERROR::2012-07-25 23:18:56,028::vm::240::vm.Vm::(run)
> vmId=`11e06222-2d66-4da5-8310-6dcc970e5367`::Failed to migrate
> Traceback (most recent call last):
> File "/usr/share/vdsm/vm.py", line 223, in run
> self._startUnderlyingMigration()
> File "/usr/share/vdsm/libvirtvm.py", line 451, in
> _startUnderlyingMigration
> None, maxBandwidth)
> File "/usr/share/vdsm/libvirtvm.py", line 491, in f
> ret = attr(*args, **kwargs)
> File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py",
> line 82, in wrapper
> ret = f(*args, **kwargs)
> File "/usr/lib64/python2.7/site-packages/libvirt.py", line 1034, in
> migrateToURI2
> if ret == -1: raise libvirtError ('virDomainMigrateToURI2() failed',
> dom=self)
> libvirtError: operation failed: Failed to connect to remote libvirt
> URI qemu+tcp://9.181.129.110/system

The destination host doesn't look right (9.181.129.110).
Can you post the logs related to the vmMigrate parameters?
Eventually you could open a bug so that you can attach the full logs.

-- 
Federico
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