Hello friends. After I have updated one host with "yum update -y", I have this message and the host fails to connect to storage server (ISO type) (other host not updated yet are working fine): Thread-25::WARNING::2016-11-21 17:26:18,152::lvm::376::Storage.LVM::(_reloadvgs) lvm vgs failed: 5 [] [' WARNING: lvmetad is running but disabled. Restart lvmetad before enabling it!', ' Volume group "b55443b5-39a0-4cb6-8018-9c508815dd28" not found', ' Cannot process volume group b55443b5-39a0-4cb6-8018-9c508815dd28'] Thread-25::ERROR::2016-11-21 17:26:18,155::sdc::146::Storage.StorageDomainCache::(_findDomain) domain b55443b5-39a0-4cb6-8018-9c508815dd28 not found Traceback (most recent call last): File "/usr/share/vdsm/storage/sdc.py", line 144, in _findDomain dom = findMethod(sdUUID) File "/usr/share/vdsm/storage/sdc.py", line 174, in _findUnfetchedDomain raise se.StorageDomainDoesNotExist(sdUUID) StorageDomainDoesNotExist: Storage domain does not exist: (u'b55443b5-39a0-4cb6-8018-9c508815dd28',) Thread-25::ERROR::2016-11-21 17:26:18,156::monitor::328::Storage.Monitor::(_setupLoop) Setting up monitor for b55443b5-39a0-4cb6-8018-9c508815dd28 failed Traceback (most recent call last): File "/usr/share/vdsm/storage/monitor.py", line 325, in _setupLoop self._setupMonitor() File "/usr/share/vdsm/storage/monitor.py", line 348, in _setupMonitor self._produceDomain() File "/usr/lib/python2.7/site-packages/vdsm/utils.py", line 405, in wrapper value = meth(self, *a, **kw) File "/usr/share/vdsm/storage/monitor.py", line 366, in _produceDomain self.domain = sdCache.produce(self.sdUUID) File "/usr/share/vdsm/storage/sdc.py", line 101, in produce domain.getRealDomain() File "/usr/share/vdsm/storage/sdc.py", line 53, in getRealDomain return self._cache._realProduce(self._sdUUID) File "/usr/share/vdsm/storage/sdc.py", line 125, in _realProduce domain = self._findDomain(sdUUID) File "/usr/share/vdsm/storage/sdc.py", line 144, in _findDomain dom = findMethod(sdUUID) File "/usr/share/vdsm/storage/sdc.py", line 174, in _findUnfetchedDomain raise se.StorageDomainDoesNotExist(sdUUID) StorageDomainDoesNotExist: Storage domain does not exist: (u'b55443b5-39a0-4cb6-8018-9c508815dd28',) The status of the host is "UP", but I still receiving the messages about the host trying connect to iso domain. I appreciate any help about, thanks!