[ovirt-users] Gluster and few iSCSI Datastores in one Data Center

I decided to add another cluster to the existing data center (Enable Virt Service + Enable Gluster Service). Three nodes. But after installing the nodes (without errors) Ovirt Engine loses them cyclically. From the logs you can see that this happens when you try to interrogate the connected block devices. These block devices are LVM for VM. I use several Datastores submitted via iSCSI. About 2000 virtual machines and more than 2300 LVMs. All in the neighbor cluster (one data center). Logs in https://drive.google.com/open?id=1ja7Usxx5YCFDgjD2X51z9tzn_ycPoC2g Why is this happening and what can be done in this case?