diff --git a/nova/api/openstack/placement/handlers/allocation.py b/nova/api/openstack/placement/handlers/allocation.py
index 208ea0b8ba8e..aca2c7bdcb52 100644
--- a/nova/api/openstack/placement/handlers/allocation.py
+++ b/nova/api/openstack/placement/handlers/allocation.py
@@ -14,14 +14,18 @@
 import collections
 
 import jsonschema
+from oslo_log import log as logging
 from oslo_serialization import jsonutils
 import webob
 
 from nova.api.openstack.placement import util
 from nova import exception
+from nova.i18n import _LE
 from nova import objects
 
 
+LOG = logging.getLogger(__name__)
+
 ALLOCATION_SCHEMA = {
     "type": "object",
     "properties": {
@@ -248,16 +252,20 @@ def set_allocations(req):
             allocation_objects.append(allocation)
 
     allocations = objects.AllocationList(context, objects=allocation_objects)
+
     try:
         allocations.create_all()
+        LOG.debug("Successfully wrote allocations %s", allocations)
     # InvalidInventory is a parent for several exceptions that
     # indicate either that Inventory is not present, or that
     # capacity limits have been exceeded.
     except exception.InvalidInventory as exc:
+        LOG.exception(_LE("Bad inventory"))
         raise webob.exc.HTTPConflict(
             'Unable to allocate inventory: %s' % exc,
             json_formatter=util.json_error_formatter)
     except exception.ConcurrentUpdateDetected as exc:
+        LOG.exception(_LE("Concurrent Update"))
         raise webob.exc.HTTPConflict(
             'Inventory changed while attempting to allocate: %s' % exc,
             json_formatter=util.json_error_formatter)
@@ -279,6 +287,7 @@ def delete_allocations(req):
             "No allocations for consumer '%s'" % consumer_uuid,
             json_formatter=util.json_error_formatter)
     allocations.delete_all()
+    LOG.debug("Successfully deleted allocations %s", allocations)
 
     req.response.status = 204
     req.response.content_type = None
diff --git a/nova/objects/resource_provider.py b/nova/objects/resource_provider.py
index f80fda446ac6..bc61a92d9c1b 100644
--- a/nova/objects/resource_provider.py
+++ b/nova/objects/resource_provider.py
@@ -871,6 +871,10 @@ class AllocationList(base.ObjectListBase, base.NovaObject):
     def delete_all(self):
         self._delete_allocations(self._context, self.objects)
 
+    def __repr__(self):
+        strings = [repr(x) for x in self.objects]
+        return "AllocationList[" + ", ".join(strings) + "]"
+
 
 @base.NovaObjectRegistry.register
 class Usage(base.NovaObject):
@@ -930,3 +934,7 @@ class UsageList(base.ObjectListBase, base.NovaObject):
     def get_all_by_resource_provider_uuid(cls, context, rp_uuid):
         usage_list = cls._get_all_by_resource_provider_uuid(context, rp_uuid)
         return base.obj_make_list(context, cls(context), Usage, usage_list)
+
+    def __repr__(self):
+        strings = [repr(x) for x in self.objects]
+        return "UsageList[" + ", ".join(strings) + "]"