Hi, i just installed a new host, which cannot connect to the master domain. The domain is an iscsi device on a nas, and ovirt is actually fine with it, other hosts have no problem. I'sure , I#m just overlooking something. What I see in the log is: 024-04-16 11:10:06,320-0400 INFO (jsonrpc/3) [storage.storagepoolmemorybackend] new storage pool master version 302 and domains map {'6f018fbd-de93-4c56-880d-8ede2aad2674': 'Active', '2c870e06-6c70-45ec-b665-ce29408c8a8e': 'Active', 'a154 96dc-c241-4658-af9d-0dfe11783916': 'Active', '41012bfb-b802-4092-b699-7f5284d95c8e': 'Active'} (spbackends:417) 2024-04-16 11:10:06,320-0400 INFO (jsonrpc/3) [storage.storagepool] updating pool 5836aaac-0030-0064-024d-0000000002e4 backend from type NoneType instance 0x7f10d667fb70 to type StoragePoolMemoryBackend instance 0x7f10702d7408 (sp:149) 2024-04-16 11:10:06,320-0400 INFO (jsonrpc/3) [storage.storagepool] Connect host #2 to the storage pool 5836aaac-0030-0064-024d-0000000002e4 with master domain: a15496dc-c241-4658-af9d-0dfe11783916 (ver = 302) (sp:699) 2024-04-16 11:10:06,320-0400 INFO (jsonrpc/3) [storage.storagedomaincache] Invalidating storage domain cache (sdc:57) 2024-04-16 11:10:06,320-0400 INFO (jsonrpc/3) [storage.storagedomaincache] Clearing storage domain cache (sdc:182) 2024-04-16 11:10:06,320-0400 INFO (jsonrpc/3) [storage.storagedomaincache] Refreshing storage domain cache (resize=True) (sdc:63) 2024-04-16 11:10:06,320-0400 INFO (jsonrpc/3) [storage.iscsi] Scanning iSCSI devices (iscsi:445) 2024-04-16 11:10:06,456-0400 INFO (jsonrpc/3) [storage.iscsi] Scanning iSCSI devices: 0.14 seconds (utils:373) 2024-04-16 11:10:06,456-0400 INFO (jsonrpc/3) [storage.hba] Scanning FC devices (hba:42) 2024-04-16 11:10:06,481-0400 INFO (jsonrpc/3) [storage.hba] Scanning FC devices: 0.03 seconds (utils:373) 2024-04-16 11:10:06,481-0400 INFO (jsonrpc/3) [storage.multipath] Waiting until multipathd is ready (multipath:95) 2024-04-16 11:10:08,498-0400 INFO (jsonrpc/3) [storage.multipath] Waited 2.02 seconds for multipathd (tries=2, ready=2) (multipath:122) 2024-04-16 11:10:08,498-0400 INFO (jsonrpc/3) [storage.multipath] Resizing multipath devices (multipath:223) 2024-04-16 11:10:08,499-0400 INFO (jsonrpc/3) [storage.multipath] Resizing multipath devices: 0.00 seconds (utils:373) 2024-04-16 11:10:08,499-0400 INFO (jsonrpc/3) [storage.storagedomaincache] Refreshing storage domain cache: 2.18 seconds (utils:373) 2024-04-16 11:10:08,499-0400 INFO (jsonrpc/3) [storage.storagedomaincache] Looking up domain a15496dc-c241-4658-af9d-0dfe11783916 (sdc:154) 2024-04-16 11:10:08,536-0400 INFO (jsonrpc/3) [storage.storagedomaincache] Looking up domain a15496dc-c241-4658-af9d-0dfe11783916: 0.04 seconds (utils:373) 2024-04-16 11:10:08,537-0400 INFO (jsonrpc/3) [vdsm.api] FINISH connectStoragePool error=Cannot find master domain: 'spUUID=5836aaac-0030-0064-024d-0000000002e4, msdUUID=a15496dc-c241-4658-af9d-0dfe11783916' from=::ffff:10.2.0.4,44914, flo w_id=44d9e674, task_id=32f0ea2a-044b-4a81-a12e-a269e59a802b (api:35) 2024-04-16 11:10:08,537-0400 ERROR (jsonrpc/3) [storage.taskmanager.task] (Task='32f0ea2a-044b-4a81-a12e-a269e59a802b') Unexpected error (task:860) Traceback (most recent call last): File "/usr/lib/python3.6/site-packages/vdsm/storage/sp.py", line 1550, in setMasterDomain domain = sdCache.produce(msdUUID) File "/usr/lib/python3.6/site-packages/vdsm/storage/sdc.py", line 98, in produce domain.getRealDomain() File "/usr/lib/python3.6/site-packages/vdsm/storage/sdc.py", line 34, in getRealDomain return self._cache._realProduce(self._sdUUID) File "/usr/lib/python3.6/site-packages/vdsm/storage/sdc.py", line 122, in _realProduce domain = self._findDomain(sdUUID) File "/usr/lib/python3.6/site-packages/vdsm/storage/sdc.py", line 139, in _findDomain return findMethod(sdUUID) File "/usr/lib/python3.6/site-packages/vdsm/storage/sdc.py", line 169, in _findUnfetchedDomain raise se.StorageDomainDoesNotExist(sdUUID) vdsm.storage.exception.StorageDomainDoesNotExist: Storage domain does not exist: ('a15496dc-c241-4658-af9d-0dfe11783916',) During handling of the above exception, another exception occurred: .... The domain a15496dc-c241-4658-af9d-0dfe11783916 definitely exist, and works on other systems. THe new host can acces the iscsi targets, and i am able to log into them. Any one who knows, which blinder I have to remove, so I see the actual problem? Thanks and best regards Steffen