[libvirt-users] A issue about KVM block migration

Hello everyone, I have a issue about the KVM block migration. Please give me some help. 1) I use the "virsh create" command to start a KVM VM in source machine. 2) And then, I use "virsh migrate" cammand to start a block migration: # virsh migrate --live --copy-storage-all --verbose win7 qemu+ssh:// 186.100.8.136/system root(a)186.100.8.136's password: Migration : [ 93% ] I execute "virsh list" command in source machine, and the result is: #virsh list Id Name State ----------------------------------------------------------- 1 win7 running I can find the corresponding qemu-kvm process in the result of "ps -ef | grep qemu-kvm" in source machine. And I execute "virsh list" command in destination machine, and the result is: #virsh list Id Name State ----------------------------------------------------------- 1 win7 paused 3) But after a few minutes，there have a error: # virsh migrate --live --copy-storage-all --verbose win7 qemu+ssh:// 186.100.8.136/system root(a)186.100.8.136's password: Migration : [ 97% ] error: Unable to read from monitor : Connection reset by peer. I execute "virsh list" command in source machine again, and the result is NULL. I cannot find the corresponding qemu-kvm process in the result of "ps -ef | grep qemu-kvm" in source machine. And I execute "virsh list" command in destination machine again, and the result is NULL. But, when I only use qemu-kvm command not use libvirt, I can test block migration successfully (use qemu-kvm to create a VM, and exec "migrate -b -d xxx" command in qemu-kvm monitor to migrate). The version of libvirt is 1.0.1 and the version of qemu-kvm is 1.2.0 ( 1.2.2 is also have this issue). Please give me some help. How to solve the issue. Thanks a lot. **