[ovirt-users] storage domain and nfs problem

hi everyone i have a bad problem in ovirt3.6.1. my hosts goes to nonresponsiveness or nonoperational. i take stale file handle in df -h command on my main host and some other hosts too: [root@mainhv ~]# df -h df: ‘/rhev/data-center/mnt/hv03:_VM’: Stale file handle df: ‘/rhev/data-center/mnt/hv04:_VM’: Stale file handle df: ‘/rhev/data-center/mnt/hv05:_VM’: Stale file handle df: ‘/rhev/data-center/mnt/hv07:_VM’: Stale file handle Filesystem Size Used Avail Use% Mounted on /dev/sda6 4.0G 112M 3.9G 3% / devtmpfs 24G 0 24G 0% /dev tmpfs 24G 4.0K 24G 1% /dev/shm tmpfs 24G 41M 24G 1% /run tmpfs 24G 0 24G 0% /sys/fs/cgroup i attached vdsm.log and engine.log too. my server specification: os: centos7.1 updated ovirt 3.6.1 vdsm : 4.17.13-0.el7.centos libvirt: 1.2.8-16.el7_1.5 data storage: /VM based on xfs filesystem fstab: uuid ...... /VM xfs defaults 0 0 thanks inadvance