diff --git a/watcher/common/exception.py b/watcher/common/exception.py
index 1ecc284b8..eba875424 100644
--- a/watcher/common/exception.py
+++ b/watcher/common/exception.py
@@ -516,3 +516,7 @@ class NegativeLimitError(WatcherException):
 class NotificationPayloadError(WatcherException):
     _msg_fmt = _("Payload not populated when trying to send notification "
                  "\"%(class_name)s\"")
+
+
+class InvalidPoolAttributeValue(Invalid):
+        msg_fmt = _("The %(name)s pool %(attribute)s is not integer")
diff --git a/watcher/decision_engine/model/collector/cinder.py b/watcher/decision_engine/model/collector/cinder.py
index 0c1f98b02..5de05b1f0 100644
--- a/watcher/decision_engine/model/collector/cinder.py
+++ b/watcher/decision_engine/model/collector/cinder.py
@@ -222,8 +222,21 @@ class ModelBuilder(object):
 
         :param pool: A storage pool
         :type pool: :py:class:`~cinderlient.v2.capabilities.Capabilities`
+        :raises: exception.InvalidPoolAttributeValue
         """
         # build up the storage pool.
+
+        attrs = ["total_volumes", "total_capacity_gb",
+                 "free_capacity_gb", "provisioned_capacity_gb",
+                 "allocated_capacity_gb"]
+
+        for attr in attrs:
+            try:
+                int(getattr(pool, attr))
+            except ValueError:
+                raise exception.InvalidPoolAttributeValue(
+                    name=pool.name, attribute=attr)
+
         node_attributes = {
             "name": pool.name,
             "total_volumes": pool.total_volumes,
diff --git a/watcher/tests/decision_engine/cluster/test_cinder_cdmc.py b/watcher/tests/decision_engine/cluster/test_cinder_cdmc.py
index 9c275319b..ef4f4cd0b 100644
--- a/watcher/tests/decision_engine/cluster/test_cinder_cdmc.py
+++ b/watcher/tests/decision_engine/cluster/test_cinder_cdmc.py
@@ -14,6 +14,7 @@
 import mock
 
 from watcher.common import cinder_helper
+from watcher.common import exception
 from watcher.decision_engine.model.collector import cinder
 from watcher.tests import base
 from watcher.tests import conf_fixture
@@ -101,3 +102,51 @@ class TestCinderClusterDataModelCollector(base.TestCase):
         self.assertEqual(storage_node.host, 'host@backend')
         self.assertEqual(storage_pool.name, 'host@backend#pool')
         self.assertEqual(volume.uuid, '1')
+
+    @mock.patch('keystoneclient.v3.client.Client', mock.Mock())
+    @mock.patch.object(cinder_helper, 'CinderHelper')
+    def test_cinder_cdmc_total_capacity_gb_not_integer(
+            self, m_cinder_helper_cls):
+
+        m_cinder_helper = mock.Mock(name="cinder_helper")
+        m_cinder_helper_cls.return_value = m_cinder_helper
+
+        fake_storage_node = mock.Mock(
+            host='host@backend',
+            zone='zone',
+            status='enabled',
+            state='up',
+            volume_type=['fake_type']
+        )
+
+        fake_storage_pool = mock.Mock(
+            total_volumes=1,
+            total_capacity_gb="unknown",
+            free_capacity_gb=20,
+            provisioned_capacity_gb=10,
+            allocated_capacity_gb=10,
+            virtual_free=20
+        )
+        setattr(fake_storage_pool, 'name', 'host@backend#pool')
+
+        # storage node list
+        m_cinder_helper.get_storage_node_list.return_value = [
+            fake_storage_node]
+        m_cinder_helper.get_volume_type_by_backendname.return_value = [
+            'fake_type']
+
+        # storage pool list
+        m_cinder_helper.get_storage_pool_list.return_value = [
+            fake_storage_pool]
+
+        # volume list
+        m_cinder_helper.get_volume_list.return_value = []
+
+        m_config = mock.Mock()
+        m_osc = mock.Mock()
+
+        cinder_cdmc = cinder.CinderClusterDataModelCollector(
+            config=m_config, osc=m_osc)
+
+        self.assertRaises(exception.InvalidPoolAttributeValue,
+                          cinder_cdmc.execute)