[ovirt-users] When I create a new domain in storage , it report : VDSM command ActivateStorageDomainVDS failed: Unknown pool id, pool not connected: (u'b87012a1-8f7a-4af5-8884-e0fb8002e842', )

The version of ovirt-engine is 4.2.8 The version of ovirt-node is 4.2.8 When I create a new domain in storage , the storage type is NFS , it report : VDSM command ActivateStorageDomainVDS failed: Unknown pool id, pool not connected: (u'b87012a1-8f7a-4af5-8884-e0fb8002e842',) The error of vdsm.log is : 2019-08-23 11:02:14,740+0800 INFO (jsonrpc/4) [vdsm.api] START connectStorageServer(domType=1, spUUID=u'00000000-0000-0000-0000-000000000000', conList=[{u'id': u'c6893a09-ab28-4328-b186-d2f88f2320d4', u'connection': u'172.16.10.74:/ovirt-data', u'iqn': u'', u'user': u'', u'tpgt': u'1', u'protocol_version': u'auto', u'password': '********', u'port': u''}], options=None) from=::ffff:172.16.90.10,52962, flow_id=5d720a32, task_id=2af924ff-37a6-46a1-b79f-4251d21d5ff9 (api:46) 2019-08-23 11:02:14,743+0800 INFO (jsonrpc/4) [vdsm.api] FINISH connectStorageServer return={'statuslist': [{'status': 0, 'id': u'c6893a09-ab28-4328-b186-d2f88f2320d4'}]} from=::ffff:172.16.90.10,52962, flow_id=5d720a32, task_id=2af924ff-37a6-46a1-b79f-4251d21d5ff9 (api:52) 2019-08-23 11:02:14,743+0800 INFO (jsonrpc/4) [jsonrpc.JsonRpcServer] RPC call StoragePool.connectStorageServer succeeded in 0.00 seconds (__init__:573) 2019-08-23 11:02:14,751+0800 INFO (jsonrpc/6) [vdsm.api] START activateStorageDomain(sdUUID=u'3bcdc32c-040e-4a4c-90fb-de950f54f1b4', spUUID=u'b87012a1-8f7a-4af5-8884-e0fb8002e842', options=None) from=::ffff:172.16.90.10,53080, flow_id=709ee722, task_id=9b8f32af-5fdd-4ffa-9520-c474af03db70 (api:46) 2019-08-23 11:02:14,752+0800 INFO (jsonrpc/6) [vdsm.api] FINISH activateStorageDomain error=Unknown pool id, pool not connected: (u'b87012a1-8f7a-4af5-8884-e0fb8002e842',) from=::ffff:172.16.90.10,53080, flow_id=709ee722, task_id=9b8f32af-5fdd-4ffa-9520-c474af03db70 (api:50) 2019-08-23 11:02:14,752+0800 ERROR (jsonrpc/6) [storage.TaskManager.Task] (Task='9b8f32af-5fdd-4ffa-9520-c474af03db70') 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 activateStorageDomain File "/usr/lib/python2.7/site-packages/vdsm/common/api.py", line 48, in method ret = func(*args, **kwargs) File "/usr/lib/python2.7/site-packages/vdsm/storage/hsm.py", line 1262, in activateStorageDomain pool = self.getPool(spUUID) File "/usr/lib/python2.7/site-packages/vdsm/storage/hsm.py", line 350, in getPool raise se.StoragePoolUnknown(spUUID) StoragePoolUnknown: Unknown pool id, pool not connected: (u'b87012a1-8f7a-4af5-8884-e0fb8002e842',) 2019-08-23 11:02:14,752+0800 INFO (jsonrpc/6) [storage.TaskManager.Task] (Task='9b8f32af-5fdd-4ffa-9520-c474af03db70') aborting: Task is aborted: "Unknown pool id, pool not connected: (u'b87012a1-8f7a-4af5-8884-e0fb8002e842',)" - code 309 (task:1181) 2019-08-23 11:02:14,752+0800 ERROR (jsonrpc/6) [storage.Dispatcher] FINISH activateStorageDomain error=Unknown pool id, pool not connected: (u'b87012a1-8f7a-4af5-8884-e0fb8002e842',) (dispatcher:82) How can I solve this problem ?