If unable to send submission to grader store it instead.

ORA-197

common/lib/xmodule/xmodule/open_ended_grading_classes/open_ended_module.py

@@ -282,7 +282,7 @@ class OpenEndedModule(openendedchild.OpenEndedChild):
         message = "Successfully saved your submission."
         if error:
             success = False
-            message = 'Unable to send your submission to grader. Please try again later.'
+            message = 'Unable to submit your submission to grader. Please try again later.'
             log.error("Unable to submit to grader. location: {0}, error_message: {1}".format(
                 self.location_string, error_message
             ))
@@ -702,6 +702,8 @@ class OpenEndedModule(openendedchild.OpenEndedChild):
             success, error_message = self.send_to_grader(data['student_answer'], system)
             if not success:
                 message = error_message
+                # Store the answer instead
+                self.store_answer(data, system)
             else:
                 self.new_history_entry(data['student_answer'])
                 self.change_state(self.ASSESSING)

common/lib/xmodule/xmodule/tests/test_combined_open_ended.py

@@ -363,8 +363,10 @@ class OpenEndedModuleTest(unittest.TestCase):
         )
         self.assertFalse(response['success'])
         self.assertNotEqual(self.openendedmodule.latest_answer(), submission)
+        self.assertEqual(self.openendedmodule.stored_answer, submission)
         state = json.loads(self.openendedmodule.get_instance_state())
         self.assertEqual(state['child_state'], OpenEndedModule.INITIAL)
+        self.assertEqual(state['stored_answer'], submission)
 
     def update_score_single(self):
         self.openendedmodule.new_history_entry("New Entry")