diff --git a/nova-powervc/powervc/nova/driver/compute/manager.py b/nova-powervc/powervc/nova/driver/compute/manager.py
index 3f77c59..a2a97c8 100644
--- a/nova-powervc/powervc/nova/driver/compute/manager.py
+++ b/nova-powervc/powervc/nova/driver/compute/manager.py
@@ -501,10 +501,19 @@ class PowerVCCloudManager(manager.Manager):
         inst_obj.save()
 
         # Update quota
-        quotas = objects.Quotas(ctx)
-        quotas.reserve(instances=1,
-                       cores=ins.get("vcpus"), ram=ins.get("memory_mb"))
-        quotas.commit()
+        try:
+            dis_name = ins.get("display_name")
+            vcpus = ins.get("vcpus")
+            memory_mb = ins.get("memory_mb")
+            quotas = objects.Quotas(ctx)
+            quotas.reserve(instances=1, cores=vcpus, ram=memory_mb)
+            LOG.info(_("Start to deduct quota of vm: %s, cores: %s, ram: %s") %
+                     (dis_name, vcpus, memory_mb))
+            quotas.commit()
+        except Exception as e:
+                LOG.debug(_("Quota exceeded for instance: %s. Exception: %s")
+                          % (dis_name, str(e)))
+
         LOG.debug('created local db instance: %s for '
                   'powervc instance: %s' % (inst_obj, pvc_instance))
         self.sync_volume_attachment(ctx,
diff --git a/nova-powervc/powervc/nova/driver/virt/powervc/driver.py b/nova-powervc/powervc/nova/driver/virt/powervc/driver.py
index f770388..f47fc8e 100644
--- a/nova-powervc/powervc/nova/driver/virt/powervc/driver.py
+++ b/nova-powervc/powervc/nova/driver/virt/powervc/driver.py
@@ -113,7 +113,7 @@ class PowerVCDriver(driver.ComputeDriver):
         :num_cpu:         (int) the number of virtual CPUs for the domain
         :cpu_time:        (int) the CPU time used in nanoseconds
         """
-        LOG.debug(_("get_info() Enter: %s" % str(instance)))
+        LOG.debug(_("get_info() Enter: %s") % str(instance))
         lpar_instance = None
         try:
             pvc_id = self._get_pvcid_from_metadata(instance)
@@ -125,22 +125,21 @@ class PowerVCDriver(driver.ComputeDriver):
                 pvc_id = self._get_pvcid_from_metadata(db_instances[0])
             LOG.debug(_("pvc_id: %s" % str(pvc_id)))
             lpar_instance = self.get_instance(pvc_id)
-            LOG.debug(_("Found instance: %s" % str(lpar_instance)))
+            LOG.debug(_("Found instance: %s") % str(lpar_instance))
         except Exception:
             if pvc_id is None:
                 LOG.info(_("Can not get the pvc_id from the"
-                           " instance %s." % instance['name']))
+                           " instance %s.") % instance['name'])
             else:
                 LOG.info(_("Can not get the PowerVC"
-                           " instance %s." % pvc_id))
-            raise exception.NotFound
+                           " instance %s.") % pvc_id)
+            return pvc_vm_states.InstanceInfo(state=0)
 
         if(lpar_instance is None):
-            LOG.info(_("Can not get the PowerVC"
-                       " instance %s." % pvc_id))
-            raise exception.NotFound
+            LOG.debug(_("Can not get the PowerVC instance %s, will delete it"
+                      " in the next sync.") % pvc_id)
+            return pvc_vm_states.InstanceInfo(state=0)
 
-        LOG.debug(_("get_info() Exit"))
         max_mem = self._int_or_none(lpar_instance._info.get('max_memory_mb'))
         mem = self._int_or_none(lpar_instance._info.get('memory_mb'))
         num_cpu = self._int_or_none(lpar_instance._info.get('cpus'))