Libvirt Save Problem

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Hi list,

i use a CentOS 7 as virtual host with two guests with windows 2012 standard
( as storage i use RAW files).

My problem is that sometime during the bakup my server reboot without leaving information in the log files ( /var/log/messages ).

The backup does this steps:
1) Save the state of the virtual guest ( with the command “virsh save ” )
2) Make a snapshot of the filesystem ( with lvm2 )
3) Make a backup of the snapshot

I found that the problem is related with the save of the state, without saving the state i have no problem.

Could you help me?

Thanks.

[root@kvm1 ~]# rpm -aq | grep libvirt libvirt-daemon-driver-interface-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-config-nwfilter-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-storage-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-qemu-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-secret-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-network-1.1.1-29.el7_0.3.x86_64
libvirt-client-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-nwfilter-1.1.1-29.el7_0.3.x86_64
libvirt-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-nodedev-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-config-network-1.1.1-29.el7_0.3.x86_64
libvirt-daemon-driver-lxc-1.1.1-29.el7_0.3.x86_64

Kernel 3.10.0-123.8.1.el7.x86_64 #1 SMP.

[root@kvm1 ~]# rpm -aq | grep qemu libvirt-daemon-driver-qemu-1.1.1-29.el7_0.3.x86_64
qemu-kvm-1.5.3-60.el7_0.7.0.1.x86_64
qemu-system-x86-2.0.0-1.el7.1.x86_64
ipxe-roms-qemu-20130517-5.gitc4bce43.el7.noarch qemu-img-1.5.3-60.el7_0.7.0.1.x86_64
qemu-common-2.0.0-1.el7.1.x86_64
qemu-kvm-common-1.5.3-60.el7_0.7.0.1.x86_64

[root@kvm1 ~]# rpm -aq | grep lvm2
lvm2-2.02.105-14.el7.x86_64
lvm2-libs-2.02.105-14.el7.x86_64

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