Fix for exception handling.

zipline/messaging.py

@@ -64,9 +64,10 @@ class Component(object):
             #close all the sockets
             for sock in self.sockets:
                 sock.close()
-        except:
-            qutil.LOGGER.exception("Unexpected error in run for {id}.".format(id=self.get_id()))
 
+        except Exception as e:
+            qutil.LOGGER.exception("Unexpected error in run for {id}.".format(id=self.get_id()))
+            raise e
         finally:
             self.context.destroy()
     
@@ -476,4 +477,4 @@ class DataSource(Component):
         self.data_socket.send(json.dumps(event))
 
     def get_type(self):
-        raise NotImplemented
+        raise NotImplemented