I installed the latest 4.3 release candidate and tried to add an NFS mount to the Data Center, and it errors in the GUI with “Error while executing action New NFS Storage Domain: Invalid parameter”, then in the vdsm.log I see it is passing “block_size=None”. Does this regardless if NFS v3 or v4.

InvalidParameterException: Invalid parameter: 'block_size=None'

2019-01-12 20:37:58,241-0700 INFO  (jsonrpc/7) [vdsm.api] START createStorageDomain(storageType=1, sdUUID=u'b30c64c4-4b1f-4ebf-828b-e54c330ae84c', domainName=u'nfsdata', typeSpecificArg=u'192.168.19.155:/data/data', domClass=1, domVersion=u'4', block_size=None, max_hosts=2000, options=None) from=::ffff:192.168.19.178,51042, flow_id=67743df7, task_id=ad82f581-9638-48f1-bcd9-669b9809b34a (api:48)
2019-01-12 20:37:58,241-0700 INFO  (jsonrpc/7) [vdsm.api] FINISH createStorageDomain error=Invalid parameter: 'block_size=None' from=::ffff:192.168.19.178,51042, flow_id=67743df7, task_id=ad82f581-9638-48f1-bcd9-669b9809b34a (api:52)
2019-01-12 20:37:58,241-0700 ERROR (jsonrpc/7) [storage.TaskManager.Task] (Task='ad82f581-9638-48f1-bcd9-669b9809b34a') Unexpected error (task:875)
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/vdsm/storage/task.py", line 882, in _run
    return fn(*args, **kargs)
  File "<string>", line 2, in createStorageDomain
  File "/usr/lib/python2.7/site-packages/vdsm/common/api.py", line 50, in method
    ret = func(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/hsm.py", line 2583, in createStorageDomain
    alignment = clusterlock.alignment(block_size, max_hosts)
  File "/usr/lib/python2.7/site-packages/vdsm/storage/clusterlock.py", line 661, in alignment
    raise se.InvalidParameterException('block_size', block_size)
InvalidParameterException: Invalid parameter: 'block_size=None'
2019-01-12 20:37:58,242-0700 INFO  (jsonrpc/7) [storage.TaskManager.Task] (Task='ad82f581-9638-48f1-bcd9-669b9809b34a') aborting: Task is aborted: u"Invalid parameter: 'block_size=None'" - code 100 (task:1181)
2019-01-12 20:37:58,242-0700 ERROR (jsonrpc/7) [storage.Dispatcher] FINISH createStorageDomain error=Invalid parameter: 'block_size=None' (dispatcher:81)
2019-01-12 20:37:58,242-0700 INFO  (jsonrpc/7) [jsonrpc.JsonRpcServer] RPC call StorageDomain.create failed (error 1000) in 0.00 seconds (__init__:312)
2019-01-12 20:37:58,541-0700 INFO  (jsonrpc/1) [vdsm.api] START disconnectStorageServer(domType=1, spUUID=u'00000000-0000-0000-0000-000000000000', conList=[{u'tpgt': u'1', u'id': u'db7d16c8-7497-42db-8a75-81cb7f9d3350', u'connection': u'192.168.19.155:/data/data', u'iqn': u'', u'user': u'', u'ipv6_enabled': u'false', u'protocol_version': u'auto', u'password': '********', u'port': u''}], options=None) from=::ffff:192.168.19.178,51042, flow_id=7e4cb4fa-1437-4d5b-acb5-958838ecd54c, task_id=1d004ea2-ae84-4c95-8c70-29e205efd4b1 (api:48)
2019-01-12 20:37:58,542-0700 INFO  (jsonrpc/1) [storage.Mount] unmounting /rhev/data-center/mnt/192.168.19.155:_data_data (mount:212)
2019-01-12 20:37:59,087-0700 INFO  (jsonrpc/1) [vdsm.api] FINISH disconnectStorageServer return={'statuslist': [{'status': 0, 'id': u'db7d16c8-7497-42db-8a75-81cb7f9d3350'}]} from=::ffff:192.168.19.178,51042, flow_id=7e4cb4fa-1437-4d5b-acb5-958838ecd54c, task_id=1d004ea2-ae84-4c95-8c70-29e205efd4b1 (api:54)
2019-01-12 20:37:59,089-0700 INFO  (jsonrpc/1) [jsonrpc.JsonRpcServer] RPC call StoragePool.disconnectStorageServer succeeded in 0.55 seconds (__init__:312)

Devin Acosta