[ovirt-users] Datacenter Down Storage error

Hi @all, I have a big problem with my datacenter. After pressing optimization for vm-storage in a active gluster volume are the vms paused. And now, i cant activate the storage in the Data-Center. I have try reboot all Servers. It runs the latest Stable ovirt Version: ovirt-engine-4.2.7.5-1.el7.noarch vdsm-gluster-4.20.43-1.el7.x86_64 glusterfs-3.12.15-1.el7.x86_64 All Servers Up-to Date. Centos 7.6 Gluster Volume Replica 3 with Arbiter /var/log/sanlock.log set scheduler RR|RESET_ON_FORK priority 99 failed: Operation not permitted VDSM ovnode3 command SpmStatusVDS failed: (22, 'Sanlock resource read failure', 'Invalid argument') can anybody help me? thx