From 02b7757d1b620257aa54420a702fe3b6ea18abcb Mon Sep 17 00:00:00 2001
From: Miles Steele <msteele@edx.org>
Date: Mon, 22 Jul 2013 13:17:59 -0400
Subject: [PATCH] add catch for tasks AlreadyRunning

---
 lms/djangoapps/instructor/views/api.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lms/djangoapps/instructor/views/api.py b/lms/djangoapps/instructor/views/api.py
index ac4a459a3d..48b3de62e1 100644
--- a/lms/djangoapps/instructor/views/api.py
+++ b/lms/djangoapps/instructor/views/api.py
@@ -25,6 +25,7 @@ from django_comment_common.models import (Role,
 
 from courseware.models import StudentModule
 import instructor_task.api
+from instructor_task.api_helper import AlreadyRunningError
 import instructor.enrollment as enrollment
 from instructor.enrollment import enroll_email, unenroll_email
 import instructor.access as access
@@ -45,6 +46,8 @@ def common_exceptions_400(func):
             return func(*args, **kwargs)
         except User.DoesNotExist:
             return HttpResponseBadRequest("User does not exist.")
+        except AlreadyRunningError:
+            return HttpResponseBadRequest("Task already running.")
     return wrapped