[libvirt] Unmarshalling error with migrate command

Chris Lalancette clalance at redhat.com
Fri Jul 16 18:26:04 UTC 2010

On 07/16/10 - 12:52:48PM, Doug Goldstein wrote:
> Hey guys,
> I'm using a server running libvirt 0.8.2 and my desktop running
> libvirt 0.8.2. My desktop has virt-manager 0.8.4 and I've got a Linux
> VM running on the server. I'm looking to use the new migration support
> to migrate the VM to my desktop from the server. Everytime I attempt
> the migration I get an error dialog containing the following (I've
> actually snagged this out of ~/.virt-manager/virt-manager.log
> [Wed, 07 Jul 2010 18:13:23 virt-manager 18880] DEBUG (migrate:456)
> Migrating vm=CentOS-5.4-i686-PAE from qemu+ssh://root@codeine/system
> to qemu:///system
> [Wed, 07 Jul 2010 18:13:23 virt-manager 18880] DEBUG (domain:1351)
> Migrating: conn=<libvirt.virConnect instance at 0x2a305f0> flags=7
> dname=None uri=qemu://doug-pc/system rate=0[Wed, 07 Jul 2010 18:13:23
> virt-manager 18880] DEBUG (error:86) Uncaught Error: unmarshalling
> remote_error : Unable to migrate guest:
>  Traceback (most recent call last):
>   File "/usr/share/virt-manager/virtManager/migrate.py", line 457, in
> _async_migrate
>     vm.migrate(dstconn, migrate_uri, rate, live, secure)
>   File "/usr/share/virt-manager/virtManager/domain.py", line 1352, in migrate
>     self._backend.migrate(destconn.vmm, flags, newname, interface, rate)
>   File "/usr/lib64/python2.6/site-packages/libvirt.py", line 479, in migrate
>     prefer to invoke virDomainMigrateToURI, avoiding the need to
> libvirtError: unmarshalling remote_error
> If anyone has any ideas, please let me know.

We did have a bug with this, but I'm pretty confident it was fixed in
libvirt 0.8.1, which makes the above odd.  Are you absolutely sure it's
0.8.2, and you aren't using some older version somewhere on the server
or on your desktop?

Chris Lalancette

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