Handle driver initialization errors to avoid service crash

This patch fixes the issue when failed osprofiler driver brings
the whole service down. With this patch the default no-op behaviour
is used in case of initialization failure.

Change-Id: I6ebc393576f4fc3f8b4134164bafc2e09f102ebd

1 files changed, 9 insertions, 0 deletions

diff --git a/osprofiler/tests/unit/test_notifier.py b/osprofiler/tests/unit/test_notifier.py
index 7cccdad..8e658fe 100644
--- a/osprofiler/tests/unit/test_notifier.py
+++ b/osprofiler/tests/unit/test_notifier.py
@@ -23,6 +23,7 @@ class NotifierTestCase(test.TestCase):
 
     def tearDown(self):
         notifier.set(notifier._noop_notifier)  # restore defaults
+        notifier.clear_notifier_cache()
         super(NotifierTestCase, self).tearDown()
 
     def test_set(self):
@@ -49,3 +50,11 @@ class NotifierTestCase(test.TestCase):
         result = notifier.create("test", 10, b=20)
         mock_factory.assert_called_once_with("test", 10, b=20)
         self.assertEqual(mock_factory.return_value.notify, result)
+
+    @mock.patch("osprofiler.notifier.base.get_driver")
+    def test_create_driver_init_failure(self, mock_get_driver):
+        mock_get_driver.side_effect = Exception()
+
+        result = notifier.create("test", 10, b=20)
+        mock_get_driver.assert_called_once_with("test", 10, b=20)
+        self.assertEqual(notifier._noop_notifier, result)