Merge pull request tornadoweb#2374 from a-pertsev/master

Use `log_exception` method in WebSocketProtocol instead of custom logging

Author: bdarnell

tornado/websocket.py

@@ -21,6 +21,7 @@
 import base64
 import hashlib
 import os
+import sys
 import struct
 import tornado.escape
 import tornado.web
@@ -512,8 +513,7 @@ def _run_callback(self, callback, *args, **kwargs):
         try:
             result = callback(*args, **kwargs)
         except Exception:
-            app_log.error("Uncaught exception in %s",
-                          getattr(self.request, 'path', None), exc_info=True)
+            self.handler.log_exception(*sys.exc_info())
             self._abort()
         else:
             if result is not None: