[libvirt] VM waiting to start long time

[Cuongds]

Hi all,
I'm have problem with my ovirt. Yesterday, my ovirt nodes (4 nodes) still 
working fine but today i cannot start vm on one of ovirt nodes (node 2), 
other node are fine. The status holding "waiting to start" when i try start 
vm (new or old vm has same result)
Log vdsm as below: Many attempting connect to vdsm

VM Channels Listener::DEBUG::2013-06-14 17:00:57,563::guestIF::95::vm.Vm::
(_connect) vmId=`ffd60b1c-9a3c-4853-88aa-7973f9756c96`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000570-
01.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:00:58,565::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 32.
VM Channels Listener::DEBUG::2013-06-14 17:00:58,565::guestIF::95::vm.Vm::
(_connect) vmId=`187f61c9-d81f-491a-b5f0-4798ec6c8342`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000565-
01.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:00:58,565::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 33.
VM Channels Listener::DEBUG::2013-06-14 17:00:58,565::guestIF::95::vm.Vm::
(_connect) vmId=`6c3074ae-c752-4622-94e7-a4ca09b252f7`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000563-
02.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:00:58,565::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 35.
VM Channels Listener::DEBUG::2013-06-14 17:00:58,566::guestIF::95::vm.Vm::
(_connect) vmId=`20f144cd-f027-4710-a433-dcdc62eec554`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000568-
01.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:00:58,566::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 37.
VM Channels Listener::DEBUG::2013-06-14 17:00:58,566::guestIF::95::vm.Vm::
(_connect) vmId=`ffd60b1c-9a3c-4853-88aa-7973f9756c96`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000570-
01.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:00:59,567::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 32.
VM Channels Listener::DEBUG::2013-06-14 17:00:59,567::guestIF::95::vm.Vm::
(_connect) vmId=`187f61c9-d81f-491a-b5f0-4798ec6c8342`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000565-
01.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:00:59,567::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 33.
VM Channels Listener::DEBUG::2013-06-14 17:00:59,568::guestIF::95::vm.Vm::
(_connect) vmId=`6c3074ae-c752-4622-94e7-a4ca09b252f7`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000563-
02.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:00:59,568::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 35.
VM Channels Listener::DEBUG::2013-06-14 17:00:59,568::guestIF::95::vm.Vm::
(_connect) vmId=`20f144cd-f027-4710-a433-dcdc62eec554`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000568-
01.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:00:59,568::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 37.
VM Channels Listener::DEBUG::2013-06-14 17:00:59,569::guestIF::95::vm.Vm::
(_connect) vmId=`ffd60b1c-9a3c-4853-88aa-7973f9756c96`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000570-
01.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:01:00,569::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 32.
VM Channels Listener::DEBUG::2013-06-14 17:01:00,569::guestIF::95::vm.Vm::
(_connect) vmId=`187f61c9-d81f-491a-b5f0-4798ec6c8342`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000565-
01.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:01:00,570::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 33.
VM Channels Listener::DEBUG::2013-06-14 17:01:00,570::guestIF::95::vm.Vm::
(_connect) vmId=`6c3074ae-c752-4622-94e7-a4ca09b252f7`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000563-
02.com.redhat.rhevm.vdsm
VM Channels Listener::DEBUG::2013-06-14 17:01:00,570::vmChannels::104::vds::
(_handle_unconnected) Trying to connect fileno 35.
VM Channels Listener::DEBUG::2013-06-14 17:01:00,570::guestIF::95::vm.Vm::
(_connect) vmId=`20f144cd-f027-4710-a433-dcdc62eec554`::Attempting 
connection to /var/lib/libvirt/qemu/channels/4000568-
01.com.redhat.rhevm.vdsm

On ovirt portal, the status of node 2 not update, when i tried to start new 
vm the number vm increase but when i stop vm or even delete them, this 
number vm's still skip
Please help me debug this, sorry about my bad E.
Thanks,