Updated log to check which site cache are miss

LEARNER-5967

openedx/core/djangoapps/catalog/tests/test_utils.py

@@ -66,7 +66,9 @@ class TestGetPrograms(CacheIsolationTestCase):
         # When called before UUIDs are cached, the function should return an
         # empty list and log a warning.
         self.assertEqual(get_programs(self.site), [])
-        mock_warning.assert_called_once_with('Failed to get program UUIDs from the cache.')
+        mock_warning.assert_called_once_with(
+            'Failed to get program UUIDs from the cache for site {}.'.format(self.site.domain)
+        )
         mock_warning.reset_mock()
 
         # Cache UUIDs for all 3 programs.

openedx/core/djangoapps/catalog/utils.py

@@ -63,7 +63,7 @@ def get_programs(site, uuid=None):
         return program
     uuids = cache.get(SITE_PROGRAM_UUIDS_CACHE_KEY_TPL.format(domain=site.domain), [])
     if not uuids:
-        logger.warning('Failed to get program UUIDs from the cache.')
+        logger.warning('Failed to get program UUIDs from the cache for site {}.'.format(site.domain))
 
     programs = cache.get_many([PROGRAM_CACHE_KEY_TPL.format(uuid=uuid) for uuid in uuids])
     programs = list(programs.values())