Why service restarts when enabling VM service which is in "recoverable" state?

Issue

• Due to libvirt unavailability the virtual machine service status went to "recoverable" state. When enabling the service it was restarted even if virtual machine was running.

# clustat
Cluster Status for cluster1 @ Tue Oct  2 10:28:41 2012
Member Status: Quorate

 Member Name                                                     ID   Status
 ------ ----                                                     ---- ------
 node1                                                   1 Online, RG-Master
 node2                                                   2 Online, RG-Worker


 Service Name                                             Owner (Last)                                             State
 ------- ----                                             ----- ------                                             -----
 vm:vm_service                                                      (node1)                                        recoverable

# clusvcadm -e vm:vm_service
Local machine trying to enable vm:vm_service...Success
vm:vm_service is now running on node1-priv0