Fix PeriodicCallback' when callback function return Future' and has

`Exception' will silence ignore
tornadoweb · Aug 6, 2014 · 2d6c02a · 2d6c02a
1 parent dbab792
commit 2d6c02a
Showing 1 changed file with 3 additions and 2 deletions.
diff --git a/tornado/ioloop.py b/tornado/ioloop.py
@@ -969,10 +969,11 @@ def _run(self):
         if not self._running:
             return
         try:
-            self.callback()
+            return self.callback()
         except Exception:
             self.io_loop.handle_callback_exception(self.callback)
-        self._schedule_next()
+        finally:
+            self._schedule_next()
 
     def _schedule_next(self):
         if self._running: