From 97136768f9615949e0bb2ac0878c5477bb32515e Mon Sep 17 00:00:00 2001
From: Calen Pennington <cale@edx.org>
Date: Mon, 6 Jun 2016 07:21:49 -0400
Subject: [PATCH] Empty the RequestCache if the request ends in an exception

---
 common/djangoapps/request_cache/middleware.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/common/djangoapps/request_cache/middleware.py b/common/djangoapps/request_cache/middleware.py
index a3198711ea..197d637683 100644
--- a/common/djangoapps/request_cache/middleware.py
+++ b/common/djangoapps/request_cache/middleware.py
@@ -51,3 +51,10 @@ class RequestCache(object):
     def process_response(self, request, response):
         self.clear_request_cache()
         return response
+
+    def process_exception(self, request, exception):  # pylint: disable=unused-argument
+        """
+        Clear the RequestCache after a failed request.
+        """
+        self.clear_request_cache()
+        return None