diff --git a/src/config/svc-monitor/svc_monitor/instance_manager.py b/src/config/svc-monitor/svc_monitor/instance_manager.py
index 7b32ca6188a..9f76963030a 100644
--- a/src/config/svc-monitor/svc_monitor/instance_manager.py
+++ b/src/config/svc-monitor/svc_monitor/instance_manager.py
@@ -175,7 +175,11 @@ def create_service_vn(self, vn_name, vn_subnet,
         subnet_info = IpamSubnetType(subnet=SubnetType(pfx, pfx_len))
         subnet_data = VnSubnetsType([subnet_info])
         vn_obj.add_network_ipam(ipam_obj, subnet_data)
-        self._vnc_lib.virtual_network_create(vn_obj)
+        try:
+            self._vnc_lib.virtual_network_create(vn_obj)
+        except RefsExistError:
+            vn_obj = self._vnc_lib.virtual_network_read(
+                fq_name=vn_obj.get_fq_name())
         VirtualNetworkSM.locate(vn_obj.uuid)
 
         return vn_obj.uuid
diff --git a/src/config/svc-monitor/svc_monitor/nova_client.py b/src/config/svc-monitor/svc_monitor/nova_client.py
index 96bc460cd1a..85f2b7e5bf4 100644
--- a/src/config/svc-monitor/svc_monitor/nova_client.py
+++ b/src/config/svc-monitor/svc_monitor/nova_client.py
@@ -46,6 +46,8 @@ def _novaclient_exec(self, resource, oper, proj_name,
                 "Multiple %s %s=%s found in project %s"
                 % (resource, kwargs.keys()[0], kwargs.values()[0], proj_name))
             return None
+        except nc_exc.Unauthorized:
+            raise
         except Exception as e:
             self.logger.log_error("nova error %s" % str(e))
             return None
@@ -56,6 +58,7 @@ def oper(self, resource, oper, proj_name, **kwargs):
                 proj_name, False, **kwargs)
         except nc_exc.Unauthorized:
             try:
+                self.logger.log_notice("nova refresh token")
                 return self._novaclient_exec(resource, oper,
                     proj_name, True, **kwargs)
             except nc_exc.Unauthorized:
diff --git a/src/config/svc-monitor/svc_monitor/virtual_machine_manager.py b/src/config/svc-monitor/svc_monitor/virtual_machine_manager.py
index 3a92d573697..30809361377 100644
--- a/src/config/svc-monitor/svc_monitor/virtual_machine_manager.py
+++ b/src/config/svc-monitor/svc_monitor/virtual_machine_manager.py
@@ -152,12 +152,20 @@ def delete_service(self, vm):
 
         # nova vm delete
         proj_name = vm.proj_fq_name[-1]
-        vm = self._nc.oper('servers', 'get', proj_name, id=vm.uuid)
-        if vm:
+        nova_vm = self._nc.oper('servers', 'get', proj_name, id=vm.uuid)
+        if nova_vm:
             try:
-                vm.delete()
-            except Exception:
+                nova_vm.delete()
+            except Exception as e:
+                self.logger.log_error("%s nova delete failed with error %s" %
+                    (vm.uuid, str(e)))
+        else:
+            try:
+                self._vnc_lib.virtual_machine_delete(id=vm.uuid)
+            except NoIdError:
                 pass
+            except RefsExistError:
+                self.logger.log_error("%s vm delete RefsExist" % (vm.uuid))
 
     def check_service(self, si):
         vm_id_list = list(si.virtual_machines)