[ovirt-users] new host addition, Cannot find master domain

hello i'm adding a new host into ovirt after the installation procces is finished I got an error: "VDSM kvm6 command ConnectStoragePoolVDS failed: Cannot find master domain". on the vdsm server in /dev/disk/by-path/ i see the block device but device-mapper not mappying it then I found the master's lun in the blacklist: /etc/multipath/conf.d/vdsm_blacklist.conf why vdsm host put the lun wwn in blacklist and what I can do ? addition info: ============ Ovirt-engine 4.4.7 vdsm server: - OS Version: RHEL - 8.5 - 1.2111.el8 - OS Description: CentOS Linux 8 - Kernel Version: 4.18.0 - 348.2.1.el8_5.x86_64 - KVM Version: 6.0.0 - 33.el8 - LIBVIRT Version: libvirt-7.6.0-6.el8 - VDSM Version: vdsm-4.40.90.4-1.el8 the vdsm server has one link connection to the fc storage lun