diff --git a/nova/api/openstack/compute/server_tags.py b/nova/api/openstack/compute/server_tags.py
index 7b6238c..0c1861e 100644
--- a/nova/api/openstack/compute/server_tags.py
+++ b/nova/api/openstack/compute/server_tags.py
@@ -96,14 +96,18 @@ class ServerTagsController(wsgi.Controller):
     @extensions.expected_errors((400, 404, 409))
     @validation.schema(schema.update)
     def update(self, req, server_id, id, body):
+        LOG.error('DAN: update')
         context = req.environ["nova.context"]
         context.can(st_policies.POLICY_ROOT % 'update')
         try:
             im = objects.InstanceMapping.get_by_instance_uuid(context,
                                                               server_id)
         except exception.InstanceMappingNotFound as e:
+            LOG.error('DAN: no mapping for instance')
             raise webob.exc.HTTPNotFound(explanation=e.format_message())

+        LOG.error('DAN: mapping is %s' % im)
+
         with nova_context.target_cell(context, im.cell_mapping):
             self._check_instance_in_valid_state(context, server_id,
                                                 'update tag')
@@ -147,14 +151,18 @@ class ServerTagsController(wsgi.Controller):
     @extensions.expected_errors((400, 404, 409))
     @validation.schema(schema.update_all)
     def update_all(self, req, server_id, body):
+        LOG.error('DAN: update_all')
         context = req.environ["nova.context"]
         context.can(st_policies.POLICY_ROOT % 'update_all')
         try:
             im = objects.InstanceMapping.get_by_instance_uuid(context,
                                                               server_id)
         except exception.InstanceMappingNotFound as e:
+            LOG.error('DAN: no update_all mapping')
             raise webob.exc.HTTPNotFound(explanation=e.format_message())

+        LOG.error('DAN: update_all mapping is %s' % im)
+
         with nova_context.target_cell(context, im.cell_mapping):
             self._check_instance_in_valid_state(context, server_id,
                                                 'update tags')