diff --git a/nova/tests/unit/virt/libvirt/test_driver.py b/nova/tests/unit/virt/libvirt/test_driver.py
index 01a30864144d..5fcde2ce6118 100644
--- a/nova/tests/unit/virt/libvirt/test_driver.py
+++ b/nova/tests/unit/virt/libvirt/test_driver.py
@@ -14917,8 +14917,9 @@ class LibvirtConnTestCase(test.NoDBTestCase,
     @mock.patch('nova.objects.InstanceList.get_by_filters',
                 return_value=objects.InstanceList(objects=[
                     objects.Instance(uuid=uuids.instance,
+                                     vm_state=vm_states.ACTIVE,
                                      task_state=task_states.DELETING)]))
-    def test_disk_over_committed_size_total_disk_not_found_ignore(
+    def test_disk_over_committed_size_total_disk_not_found_ignore_task_state(
             self, mock_get, mock_bdms, mock_get_disk_info, mock_list_domains):
         """Tests that we handle DiskNotFound gracefully for an instance that
         is undergoing a task_state transition.
@@ -14938,7 +14939,32 @@ class LibvirtConnTestCase(test.NoDBTestCase,
                 return_value=objects.BlockDeviceMappingList())
     @mock.patch('nova.objects.InstanceList.get_by_filters',
                 return_value=objects.InstanceList(objects=[
-                    objects.Instance(uuid=uuids.instance, task_state=None)]))
+                    objects.Instance(uuid=uuids.instance,
+                                     task_state=None,
+                                     vm_state=vm_states.RESIZED)]))
+    def test_disk_over_committed_size_total_disk_not_found_ignore_vmstate(
+            self, mock_get, mock_bdms, mock_get_disk_info, mock_list_domains):
+        """Tests that we handle DiskNotFound gracefully for an instance that
+        is resized but resize is not confirmed yet.
+        """
+        mock_dom = mock.Mock()
+        mock_dom.XMLDesc.return_value = "<domain/>"
+        mock_dom.UUIDString.return_value = uuids.instance
+        mock_list_domains.return_value = [mock_dom]
+        drvr = libvirt_driver.LibvirtDriver(fake.FakeVirtAPI(), False)
+        self.assertEqual(0, drvr._get_disk_over_committed_size_total())
+
+    @mock.patch('nova.virt.libvirt.host.Host.list_instance_domains')
+    @mock.patch('nova.virt.libvirt.driver.LibvirtDriver.'
+                '_get_instance_disk_info_from_config',
+                side_effect=exception.DiskNotFound(location='/opt/stack/foo'))
+    @mock.patch('nova.objects.BlockDeviceMappingList.bdms_by_instance_uuid',
+                return_value=objects.BlockDeviceMappingList())
+    @mock.patch('nova.objects.InstanceList.get_by_filters',
+                return_value=objects.InstanceList(objects=[
+                    objects.Instance(uuid=uuids.instance,
+                                     vm_state=vm_states.ACTIVE,
+                                     task_state=None)]))
     def test_disk_over_committed_size_total_disk_not_found_reraise(
             self, mock_get, mock_bdms, mock_get_disk_info, mock_list_domains):
         """Tests that we handle DiskNotFound gracefully for an instance that
diff --git a/nova/virt/libvirt/driver.py b/nova/virt/libvirt/driver.py
index eac964d75c94..afa27d9c9423 100644
--- a/nova/virt/libvirt/driver.py
+++ b/nova/virt/libvirt/driver.py
@@ -75,6 +75,7 @@ from nova import block_device
 from nova.compute import power_state
 from nova.compute import task_states
 from nova.compute import utils as compute_utils
+from nova.compute import vm_states
 import nova.conf
 from nova.console import serial as serial_console
 from nova.console import type as ctype
@@ -8151,14 +8152,19 @@ class LibvirtDriver(driver.ComputeDriver):
                     # should ignore this instance and move on.
                     if guest.uuid in local_instances:
                         inst = local_instances[guest.uuid]
-                        if inst.task_state is not None:
+                        # bug 1774249 indicated when instance is in RESIZED
+                        # state it might also can't find back disk
+                        if (inst.task_state is not None or
+                            inst.vm_state == vm_states.RESIZED):
                             LOG.info('Periodic task is updating the host '
                                      'stats; it is trying to get disk info '
                                      'for %(i_name)s, but the backing disk '
                                      'was removed by a concurrent operation '
-                                     '(task_state=%(task_state)s)',
+                                     '(task_state=%(task_state)s) and '
+                                     '(vm_state=%(vm_state)s)',
                                      {'i_name': guest.name,
-                                      'task_state': inst.task_state},
+                                      'task_state': inst.task_state,
+                                      'vm_state': inst.vm_state},
                                      instance=inst)
                             err_ctxt.reraise = False