Prevent caching of block showing top status bar (used for system alert notifications).

common/djangoapps/status/status.py

@@ -7,8 +7,6 @@ import logging
 import os
 import sys
 
-from util.cache import cache
-
 log = logging.getLogger(__name__)
 
 def get_site_status_msg():

lms/templates/navigation.html

@@ -10,9 +10,12 @@ from django.core.urlresolvers import reverse
 import branding
 # app that handles site status messages
 from status.status import get_site_status_msg
-site_status_msg = get_site_status_msg()
 %>
 
+<%block cached="False">
+<%
+site_status_msg = get_site_status_msg()
+%>
 % if site_status_msg:
 <div class="site-status">
   <div class="inner-wrapper">
@@ -21,7 +24,7 @@ site_status_msg = get_site_status_msg()
   </div>
 </div>
 % endif
-
+</%block>
 
 
 % if course: