Catch exceptions in refresh()

gtfs_client.py

@@ -352,6 +352,7 @@ class GTFSClient():
         """
         Create and enqueue the refreshed stop data
         """
+        try:
             # Retrieve the GTFS-R deltas
             deltas, canceled_trips, added_stops = self.__poll_gtfsr_deltas()
             if len(deltas) > 0 or len(canceled_trips) > 0 or len(added_stops) > 0:
@@ -390,3 +391,5 @@ class GTFSClient():
                 self._update_queue.put(arrivals)
 
             gc.collect()
+        except Exception as e:
+            print("Exception in refresh: {}".format(str(e)))