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