[libvirt-users] libvirtd restore error?

[Osier Yang]

On 02/13/2012 04:13 PM, lee wrote:
> Hi
>
> qemu-kvm-0.12.1.2-2.160.el6_1.2.x86_64
> qemu-kvm-tools-0.12.1.2-2.160.el6_1.2.x86_64
>
> libvirt-java-javadoc-0.4.7-1.el6.noarch
> libvirt-client-0.8.7-18.el6.x86_64
> fence-virtd-libvirt-qpid-0.2.1-8.el6.x86_64
> ocaml-libvirt-0.6.1.0-6.2.el6.x86_64
> libvirt-devel-0.8.7-18.el6.x86_64
> libvirt-python-0.8.7-18.el6.x86_64
> libvirt-java-0.4.7-1.el6.noarch
> libvirt-cim-0.5.11-3.el6.x86_64
> libvirt-java-devel-0.4.7-1.el6.noarch
> libvirt-client-0.8.7-18.el6.i686
> libvirt-qpid-0.2.22-6.el6.x86_64
> fence-virtd-libvirt-0.2.1-8.el6.x86_64
> libvirt-0.8.7-18.el6.x86_64
> ocaml-libvirt-devel-0.6.1.0-6.2.el6.x86_64
>
>
>
> get this error when I try to restore a vm that was 'save'.
>
> Traceback (most recent call last):
> File "/usr/share/virt-manager/virtManager/engine.py", line 909, in
> run_domain
> vm.startup()
> File "/usr/share/virt-manager/virtManager/domain.py", line 1321, in startup
> self._backend.create()
> File "/usr/lib64/python2.7/site-packages/libvirt.py", line 330, in create
> if ret == -1: raise libvirtError ('virDomainCreate() failed', dom=self)
> libvirtError: cannot send monitor command
> '{"execute":"qmp_capabilities"}': Connection reset by peer
>
>
>
> the solution was to delete the  /var/lib/libvirt/qemu/save directory.
>
> Anyone any idea of why?

It was a known bug, newer libvirt already fixed that. It's
probly caused by there is a corrupt/incomplete domain state
file with the same domain name in /var/lib/libvirt/qemu/save,
actually using "virsh managesave-remove" will help you fix
the problem.

Another way to update your libvirt to newer version, both
"virsh start" and "virsh undefine" introduced related flags
(e.g. virsh start --force-boot, virsh undefine --managed-save)
to work around the problem.

Osier