diff --git a/common/event_bus.py b/common/event_bus.py
index d572e62..8c903d9 100644
--- a/common/event_bus.py
+++ b/common/event_bus.py
@@ -111,7 +111,8 @@
                 try:
                     candidate.callback(topic, msg)
                 except Exception, e:
-                    log.warning('callback-failed', e=repr(e), topic=topic)
+                    log.exception('callback-failed', e=repr(e), topic=topic)
+
 
 
 default_bus = EventBus()