able to reach without any issues,

[root@infraesx2 ~]# tail -f /var/log/vdsm/vdsm.log
StorageDomainDoesNotExist: Storage domain does not exist: (u'93c85300-dfd1-4a59-be7b-78d871bc1f28',)
Thread-24::ERROR::2015-09-30 16:25:52,565::domainMonitor::256::Storage.DomainMonitorThread::(_monitorDomain) Error while collecting domain 93c85300-dfd1-4a59-be7b-78d871bc1f28 monitoring information
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/domainMonitor.py", line 221, in _monitorDomain
  File "/usr/share/vdsm/storage/sdc.py", line 98, in produce
  File "/usr/share/vdsm/storage/sdc.py", line 52, in getRealDomain
  File "/usr/share/vdsm/storage/sdc.py", line 122, in _realProduce
  File "/usr/share/vdsm/storage/sdc.py", line 141, in _findDomain
  File "/usr/share/vdsm/storage/sdc.py", line 171, in _findUnfetchedDomain
StorageDomainDoesNotExist: Storage domain does not exist: (u'93c85300-dfd1-4a59-be7b-78d871bc1f28',)
Thread-25::DEBUG::2015-09-30 16:26:00,915::fileSD::262::Storage.Misc.excCmd::(getReadDelay) /usr/bin/dd if=/rhev/data-center/mnt/10.204.207.175:_var_lib_exports_iso/d5939ef5-3597-4b80-99f3-b365906308c0/dom_md/metadata iflag=direct of=/dev/null bs=4096 count=1 (cwd None)
Thread-25::DEBUG::2015-09-30 16:26:00,923::fileSD::262::Storage.Misc.excCmd::(getReadDelay) SUCCESS: <err> = '0+1 records in\n0+1 records out\n342 bytes (342 B) copied, 0.000443414 s, 771 kB/s\n'; <rc> = 0
Thread-24::ERROR::2015-09-30 16:26:02,566::sdc::137::Storage.StorageDomainCache::(_findDomain) looking for unfetched domain 93c85300-dfd1-4a59-be7b-78d871bc1f28
Thread-24::ERROR::2015-09-30 16:26:02,566::sdc::154::Storage.StorageDomainCache::(_findUnfetchedDomain) looking for domain 93c85300-dfd1-4a59-be7b-78d871bc1f28
Thread-24::DEBUG::2015-09-30 16:26:02,566::lvm::371::Storage.OperationMutex::(_reloadvgs) Operation 'lvm reload operation' got the operation mutex
Thread-24::DEBUG::2015-09-30 16:26:02,566::lvm::291::Storage.Misc.excCmd::(cmd) /usr/bin/sudo -n /sbin/lvm vgs --config ' devices { preferred_names = ["^/dev/mapper/"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 obtain_device_list_from_udev=0 filter = [ '\''r|.*|'\'' ] }  global {  locking_type=1  prioritise_write_locks=1  wait_for_locks=1  use_lvmetad=0 }  backup {  retain_min = 50  retain_days = 0 } ' --noheadings --units b --nosuffix --separator '|' --ignoreskippedcluster -o uuid,name,attr,size,free,extent_size,extent_count,free_count,tags,vg_mda_size,vg_mda_free,lv_count,pv_count,pv_name 93c85300-dfd1-4a59-be7b-78d871bc1f28 (cwd None)
Thread-24::DEBUG::2015-09-30 16:26:02,722::lvm::291::Storage.Misc.excCmd::(cmd) FAILED: <err> = '  Volume group "93c85300-dfd1-4a59-be7b-78d871bc1f28" not found\n  Cannot process volume group 93c85300-dfd1-4a59-be7b-78d871bc1f28\n'; <rc> = 5
Thread-24::WARNING::2015-09-30 16:26:02,723::lvm::376::Storage.LVM::(_reloadvgs) lvm vgs failed: 5 [] ['  Volume group "93c85300-dfd1-4a59-be7b-78d871bc1f28" not found', '  Cannot process volume group 93c85300-dfd1-4a59-be7b-78d871bc1f28']
Thread-24::DEBUG::2015-09-30 16:26:02,723::lvm::416::Storage.OperationMutex::(_reloadvgs) Operation 'lvm reload operation' released the operation mutex
Thread-24::ERROR::2015-09-30 16:26:02,726::sdc::143::Storage.StorageDomainCache::(_findDomain) domain 93c85300-dfd1-4a59-be7b-78d871bc1f28 not found
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/sdc.py", line 141, in _findDomain
  File "/usr/share/vdsm/storage/sdc.py", line 171, in _findUnfetchedDomain
StorageDomainDoesNotExist: Storage domain does not exist: (u'93c85300-dfd1-4a59-be7b-78d871bc1f28',)
Thread-24::ERROR::2015-09-30 16:26:02,726::domainMonitor::256::Storage.DomainMonitorThread::(_monitorDomain) Error while collecting domain 93c85300-dfd1-4a59-be7b-78d871bc1f28 monitoring information
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/domainMonitor.py", line 221, in _monitorDomain
  File "/usr/share/vdsm/storage/sdc.py", line 98, in produce
  File "/usr/share/vdsm/storage/sdc.py", line 52, in getRealDomain
  File "/usr/share/vdsm/storage/sdc.py", line 122, in _realProduce
  File "/usr/share/vdsm/storage/sdc.py", line 141, in _findDomain
  File "/usr/share/vdsm/storage/sdc.py", line 171, in _findUnfetchedDomain
StorageDomainDoesNotExist: Storage domain does not exist: (u'93c85300-dfd1-4a59-be7b-78d871bc1f28',)
Thread-25::DEBUG::2015-09-30 16:26:10,930::fileSD::262::Storage.Misc.excCmd::(getReadDelay) /usr/bin/dd if=/rhev/data-center/mnt/10.204.207.175:_var_lib_exports_iso/d5939ef5-3597-4b80-99f3-b365906308c0/dom_md/metadata iflag=direct of=/dev/null bs=4096 count=1 (cwd None)
Thread-25::DEBUG::2015-09-30 16:26:10,938::fileSD::262::Storage.Misc.excCmd::(getReadDelay) SUCCESS: <err> = '0+1 records in\n0+1 records out\n342 bytes (342 B) copied, 0.000428685 s, 798 kB/s\n'; <rc> = 0
Thread-24::ERROR::2015-09-30 16:26:12,727::sdc::137::Storage.StorageDomainCache::(_findDomain) looking for unfetched domain 93c85300-dfd1-4a59-be7b-78d871bc1f28
Thread-24::ERROR::2015-09-30 16:26:12,727::sdc::154::Storage.StorageDomainCache::(_findUnfetchedDomain) looking for domain 93c85300-dfd1-4a59-be7b-78d871bc1f28
Thread-24::DEBUG::2015-09-30 16:26:12,727::lvm::371::Storage.OperationMutex::(_reloadvgs) Operation 'lvm reload operation' got the operation mutex
Thread-24::DEBUG::2015-09-30 16:26:12,728::lvm::291::Storage.Misc.excCmd::(cmd) /usr/bin/sudo -n /sbin/lvm vgs --config ' devices { preferred_names = ["^/dev/mapper/"] ignore_suspended_devices=1 write_cache_state=0 disable_after_error_count=3 obtain_device_list_from_udev=0 filter = [ '\''r|.*|'\'' ] }  global {  locking_type=1  prioritise_write_locks=1  wait_for_locks=1  use_lvmetad=0 }  backup {  retain_min = 50  retain_days = 0 } ' --noheadings --units b --nosuffix --separator '|' --ignoreskippedcluster -o uuid,name,attr,size,free,extent_size,extent_count,free_count,tags,vg_mda_size,vg_mda_free,lv_count,pv_count,pv_name 93c85300-dfd1-4a59-be7b-78d871bc1f28 (cwd None)
Thread-24::DEBUG::2015-09-30 16:26:12,903::lvm::291::Storage.Misc.excCmd::(cmd) FAILED: <err> = '  Volume group "93c85300-dfd1-4a59-be7b-78d871bc1f28" not found\n  Cannot process volume group 93c85300-dfd1-4a59-be7b-78d871bc1f28\n'; <rc> = 5
Thread-24::WARNING::2015-09-30 16:26:12,904::lvm::376::Storage.LVM::(_reloadvgs) lvm vgs failed: 5 [] ['  Volume group "93c85300-dfd1-4a59-be7b-78d871bc1f28" not found', '  Cannot process volume group 93c85300-dfd1-4a59-be7b-78d871bc1f28']
Thread-24::DEBUG::2015-09-30 16:26:12,905::lvm::416::Storage.OperationMutex::(_reloadvgs) Operation 'lvm reload operation' released the operation mutex
Thread-24::ERROR::2015-09-30 16:26:12,907::sdc::143::Storage.StorageDomainCache::(_findDomain) domain 93c85300-dfd1-4a59-be7b-78d871bc1f28 not found
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/sdc.py", line 141, in _findDomain
  File "/usr/share/vdsm/storage/sdc.py", line 171, in _findUnfetchedDomain
StorageDomainDoesNotExist: Storage domain does not exist: (u'93c85300-dfd1-4a59-be7b-78d871bc1f28',)
Thread-24::ERROR::2015-09-30 16:26:12,908::domainMonitor::256::Storage.DomainMonitorThread::(_monitorDomain) Error while collecting domain 93c85300-dfd1-4a59-be7b-78d871bc1f28 monitoring information
Traceback (most recent call last):
  File "/usr/share/vdsm/storage/domainMonitor.py", line 221, in _monitorDomain
  File "/usr/share/vdsm/storage/sdc.py", line 98, in produce
  File "/usr/share/vdsm/storage/sdc.py", line 52, in getRealDomain
  File "/usr/share/vdsm/storage/sdc.py", line 122, in _realProduce
  File "/usr/share/vdsm/storage/sdc.py", line 141, in _findDomain
  File "/usr/share/vdsm/storage/sdc.py", line 171, in _findUnfetchedDomain
StorageDomainDoesNotExist: Storage domain does not exist: (u'93c85300-dfd1-4a59-be7b-78d871bc1f28',)
^C
[root@infraesx2 ~]#


On Wed, Sep 30, 2015 at 9:50 PM, Simone Tiraboschi <stirabos@redhat.com> wrote:

On Wed, Sep 30, 2015 at 6:11 PM, Budur Nagaraju <nbudoor@gmail.com> wrote:
2015-09-30 18:22:15,052 WARN  [org.ovirt.engine.core.dal.dbbroker.auditloghandling.AuditLogDirector] (DefaultQuartzScheduler_Worker-7) [6e31ee33] Correlation ID: 6e31ee33, Job ID: b0ea3d1b-0019-4be5-89a9-b1135c4136f4, Call Stack: null, Custom Event ID: -1, Message: Host infraesx2 cannot access the Storage Domain(s) <UNKNOWN> attached to the Data Center Pulse. Setting Host state to Non-Operational.

It seams that your host is not able to access a storage attached to your datacenter; could you please check that?