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edx-platform
Commit 1bd0bcb8 by Calen Pennington
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Merge pull request #3091 from cpennington/ora-metrics 

Add metrics around old ORA requests
parents 4b1228be 0513e144
Showing with 244 additions and 141 deletions
common/lib/xmodule/xmodule/open_ended_grading_classes/controller_query_service.py
from dogapi import dog_stats_api
import logging
from .grading_service_module import GradingService
......@@ -9,33 +11,28 @@ class ControllerQueryService(GradingService):
Interface to controller query backend.
"""
METRIC_NAME = 'edxapp.open_ended_grading.controller_query_service'
def __init__(self, config, system):
config['system'] = system
super(ControllerQueryService, self).__init__(config)
self.url = config['url'] + config['grading_controller']
self.login_url = self.url + '/login/'
self.check_eta_url = self.url + '/get_submission_eta/'
self.is_unique_url = self.url + '/is_name_unique/'
self.combined_notifications_url = self.url + '/combined_notifications/'
self.grading_status_list_url = self.url + '/get_grading_status_list/'
self.flagged_problem_list_url = self.url + '/get_flagged_problem_list/'
self.take_action_on_flags_url = self.url + '/take_action_on_flags/'
def check_if_name_is_unique(self, location, problem_id, course_id):
params = {
'course_id': course_id,
'location': location,
'problem_id': problem_id
}
response = self.get(self.is_unique_url, params)
return response
def check_for_eta(self, location):
params = {
'location': location,
}
response = self.get(self.check_eta_url, params)
return response
data = self.get(self.check_eta_url, params)
self._record_result('check_for_eta', data)
dog_stats_api.histogram(self._metric_name('check_for_eta.eta'), data.get('eta', 0))
return data
def check_combined_notifications(self, course_id, student_id, user_is_staff, last_time_viewed):
params = {
......@@ -45,8 +42,16 @@ class ControllerQueryService(GradingService):
'last_time_viewed': last_time_viewed,
}
log.debug(self.combined_notifications_url)
response = self.get(self.combined_notifications_url, params)
return response
data = self.get(self.combined_notifications_url, params)
tags = [u'course_id:{}'.format(course_id), u'user_is_staff:{}'.format(user_is_staff)]
tags.extend(
u'{}:{}'.format(key, value)
for key, value in data.items()
if key not in ('success', 'version', 'error')
)
self._record_result('check_combined_notifications', data, tags)
return data
def get_grading_status_list(self, course_id, student_id):
params = {
......@@ -54,16 +59,31 @@ class ControllerQueryService(GradingService):
'course_id': course_id,
}
response = self.get(self.grading_status_list_url, params)
return response
data = self.get(self.grading_status_list_url, params)
tags = [u'course_id:{}'.format(course_id)]
self._record_result('get_grading_status_list', data, tags)
dog_stats_api.histogram(
self._metric_name('get_grading_status_list.length'),
len(data.get('problem_list', [])),
tags=tags
)
return data
def get_flagged_problem_list(self, course_id):
params = {
'course_id': course_id,
}
response = self.get(self.flagged_problem_list_url, params)
return response
data = self.get(self.flagged_problem_list_url, params)
tags = [u'course_id:{}'.format(course_id)]
self._record_result('get_flagged_problem_list', data, tags)
dog_stats_api.histogram(
self._metric_name('get_flagged_problem_list.length'),
len(data.get('flagged_submissions', []))
)
return data
def take_action_on_flags(self, course_id, student_id, submission_id, action_type):
params = {
......@@ -73,8 +93,11 @@ class ControllerQueryService(GradingService):
'action_type': action_type
}
response = self.post(self.take_action_on_flags_url, params)
return response
data = self.post(self.take_action_on_flags_url, params)
tags = [u'course_id:{}'.format(course_id), u'action_type:{}'.format(action_type)]
self._record_result('take_action_on_flags', data, tags)
return data
class MockControllerQueryService(object):
......@@ -85,14 +108,6 @@ class MockControllerQueryService(object):
def __init__(self, config, system):
pass
def check_if_name_is_unique(self, *args, **kwargs):
"""
Mock later if needed. Stub function for now.
@param params:
@return:
"""
pass
def check_for_eta(self, *args, **kwargs):
"""
Mock later if needed. Stub function for now.
......@@ -102,15 +117,47 @@ class MockControllerQueryService(object):
pass
def check_combined_notifications(self, *args, **kwargs):
combined_notifications = '{"flagged_submissions_exist": false, "version": 1, "new_student_grading_to_view": false, "success": true, "staff_needs_to_grade": false, "student_needs_to_peer_grade": true, "overall_need_to_check": true}'
combined_notifications = {
"flagged_submissions_exist": False,
"version": 1,
"new_student_grading_to_view": False,
"success": True,
"staff_needs_to_grade": False,
"student_needs_to_peer_grade": True,
"overall_need_to_check": True
}
return combined_notifications
def get_grading_status_list(self, *args, **kwargs):
grading_status_list = '{"version": 1, "problem_list": [{"problem_name": "Science Question -- Machine Assessed", "grader_type": "NA", "eta_available": true, "state": "Waiting to be Graded", "eta": 259200, "location": "i4x://MITx/oe101x/combinedopenended/Science_SA_ML"}, {"problem_name": "Humanities Question -- Peer Assessed", "grader_type": "NA", "eta_available": true, "state": "Waiting to be Graded", "eta": 259200, "location": "i4x://MITx/oe101x/combinedopenended/Humanities_SA_Peer"}], "success": true}'
grading_status_list = {
"version": 1,
"problem_list": [
{
"problem_name": "Science Question -- Machine Assessed",
"grader_type": "NA",
"eta_available": True,
"state": "Waiting to be Graded",
"eta": 259200,
"location": "i4x://MITx/oe101x/combinedopenended/Science_SA_ML"
}, {
"problem_name": "Humanities Question -- Peer Assessed",
"grader_type": "NA",
"eta_available": True,
"state": "Waiting to be Graded",
"eta": 259200,
"location": "i4x://MITx/oe101x/combinedopenended/Humanities_SA_Peer"
}
],
"success": True
}
return grading_status_list
def get_flagged_problem_list(self, *args, **kwargs):
flagged_problem_list = '{"version": 1, "success": false, "error": "No flagged submissions exist for course: MITx/oe101x/2012_Fall"}'
flagged_problem_list = {
"version": 1,
"success": False,
"error": "No flagged submissions exist for course: MITx/oe101x/2012_Fall"
}
return flagged_problem_list
def take_action_on_flags(self, *args, **kwargs):
......@@ -131,5 +178,4 @@ def convert_seconds_to_human_readable(seconds):
else:
human_string = "{0} days".format(round(seconds / (60 * 60 * 24), 1))
eta_string = "{0}".format(human_string)
return eta_string
return human_string
common/lib/xmodule/xmodule/open_ended_grading_classes/grading_service_module.py
......@@ -2,9 +2,10 @@
import json
import logging
import requests
from dogapi import dog_stats_api
from requests.exceptions import RequestException, ConnectionError, HTTPError
from .combined_open_ended_rubric import CombinedOpenEndedRubric
from .combined_open_ended_rubric import CombinedOpenEndedRubric, RubricParsingError
from lxml import etree
log = logging.getLogger(__name__)
......@@ -44,40 +45,66 @@ class GradingService(object):
return response.json()
def _metric_name(self, suffix):
"""
Return a metric name for datadog, using `self.METRIC_NAME` as
a prefix, and `suffix` as the suffix.
Arguments:
suffix (str): The metric suffix to use.
"""
return '{}.{}'.format(self.METRIC_NAME, suffix)
def _record_result(self, action, data, tags=None):
"""
Log results from an API call to an ORA service to datadog.
Arguments:
action (str): The ORA action being recorded.
data (dict): The data returned from the ORA service. Should contain the key 'success'.
tags (list): A list of tags to attach to the logged metric.
"""
if tags is None:
tags = []
tags.append(u'result:{}'.format(data.get('success', False)))
tags.append(u'action:{}'.format(action))
dog_stats_api.increment(self._metric_name('request.count'), tags=tags)
def post(self, url, data, allow_redirects=False):
"""
Make a post request to the grading controller
Make a post request to the grading controller. Returns the parsed json results of that request.
"""
try:
op = lambda: self.session.post(url, data=data,
allow_redirects=allow_redirects)
r = self._try_with_login(op)
except (RequestException, ConnectionError, HTTPError) as err:
response_json = self._try_with_login(op)
except (RequestException, ConnectionError, HTTPError, ValueError) as err:
# reraise as promised GradingServiceError, but preserve stacktrace.
#This is a dev_facing_error
error_string = "Problem posting data to the grading controller. URL: {0}, data: {1}".format(url, data)
log.error(error_string)
raise GradingServiceError(error_string)
return r.text
return response_json
def get(self, url, params, allow_redirects=False):
"""
Make a get request to the grading controller
Make a get request to the grading controller. Returns the parsed json results of that request.
"""
op = lambda: self.session.get(url,
allow_redirects=allow_redirects,
params=params)
try:
r = self._try_with_login(op)
except (RequestException, ConnectionError, HTTPError) as err:
response_json = self._try_with_login(op)
except (RequestException, ConnectionError, HTTPError, ValueError) as err:
# reraise as promised GradingServiceError, but preserve stacktrace.
#This is a dev_facing_error
error_string = "Problem getting data from the grading controller. URL: {0}, params: {1}".format(url, params)
log.error(error_string)
raise GradingServiceError(error_string)
return r.text
return response_json
def _try_with_login(self, operation):
"""
......@@ -101,35 +128,29 @@ class GradingService(object):
response = operation()
response.raise_for_status()
return response
return resp_json
def _render_rubric(self, response, view_only=False):
"""
Given an HTTP Response with the key 'rubric', render out the html
Given an HTTP Response json with the key 'rubric', render out the html
required to display the rubric and put it back into the response
returns the updated response as a dictionary that can be serialized later
"""
try:
response_json = json.loads(response)
except:
response_json = response
try:
if 'rubric' in response_json:
rubric = response_json['rubric']
if 'rubric' in response:
rubric = response['rubric']
rubric_renderer = CombinedOpenEndedRubric(self.system, view_only)
rubric_dict = rubric_renderer.render_rubric(rubric)
success = rubric_dict['success']
rubric_html = rubric_dict['html']
response_json['rubric'] = rubric_html
return response_json
response['rubric'] = rubric_html
return response
# if we can't parse the rubric into HTML,
except etree.XMLSyntaxError, RubricParsingError:
except (etree.XMLSyntaxError, RubricParsingError):
#This is a dev_facing_error
log.exception("Cannot parse rubric string. Raw string: {0}"
.format(rubric))
log.exception("Cannot parse rubric string. Raw string: {0}".format(response['rubric']))
return {'success': False,
'error': 'Error displaying submission'}
except ValueError:
......
common/lib/xmodule/xmodule/open_ended_grading_classes/openendedchild.py
......@@ -533,10 +533,6 @@ class OpenEndedChild(object):
def get_eta(self):
if self.controller_qs:
response = self.controller_qs.check_for_eta(self.location_string)
try:
response = json.loads(response)
except:
pass
else:
return ""
......
common/lib/xmodule/xmodule/open_ended_grading_classes/peer_grading_service.py
import json
import logging
from dogapi import dog_stats_api
from .grading_service_module import GradingService, GradingServiceError
......@@ -11,6 +12,8 @@ class PeerGradingService(GradingService):
Interface with the grading controller for peer grading
"""
METRIC_NAME = 'edxapp.open_ended_grading.peer_grading_service'
def __init__(self, config, system):
config['system'] = system
super(PeerGradingService, self).__init__(config)
......@@ -28,54 +31,78 @@ class PeerGradingService(GradingService):
def get_data_for_location(self, problem_location, student_id):
params = {'location': problem_location, 'student_id': student_id}
response = self.get(self.get_data_for_location_url, params)
return self.try_to_decode(response)
result = self.get(self.get_data_for_location_url, params)
self._record_result('get_data_for_location', result)
for key in result.keys():
if key in ('success', 'error', 'version'):
continue
dog_stats_api.histogram(
self._metric_name('get_data_for_location.{}'.format(key)),
result[key],
)
return result
def get_next_submission(self, problem_location, grader_id):
response = self.get(
result = self._render_rubric(self.get(
self.get_next_submission_url,
{
'location': problem_location,
'grader_id': grader_id
}
)
return self.try_to_decode(self._render_rubric(response))
))
self._record_result('get_next_submission', result)
return result
def save_grade(self, **kwargs):
data = kwargs
data.update({'rubric_scores_complete': True})
return self.try_to_decode(self.post(self.save_grade_url, data))
result = self.post(self.save_grade_url, data)
self._record_result('save_grade', result)
return result
def is_student_calibrated(self, problem_location, grader_id):
params = {'problem_id': problem_location, 'student_id': grader_id}
return self.try_to_decode(self.get(self.is_student_calibrated_url, params))
result = self.get(self.is_student_calibrated_url, params)
self._record_result(
'is_student_calibrated',
result,
tags=['calibrated:{}'.format(result.get('calibrated'))]
)
return result
def show_calibration_essay(self, problem_location, grader_id):
params = {'problem_id': problem_location, 'student_id': grader_id}
response = self.get(self.show_calibration_essay_url, params)
return self.try_to_decode(self._render_rubric(response))
result = self._render_rubric(self.get(self.show_calibration_essay_url, params))
self._record_result('show_calibration_essay', result)
return result
def save_calibration_essay(self, **kwargs):
data = kwargs
data.update({'rubric_scores_complete': True})
return self.try_to_decode(self.post(self.save_calibration_essay_url, data))
result = self.post(self.save_calibration_essay_url, data)
self._record_result('show_calibration_essay', result)
return result
def get_problem_list(self, course_id, grader_id):
params = {'course_id': course_id, 'student_id': grader_id}
response = self.get(self.get_problem_list_url, params)
return self.try_to_decode(response)
result = self.get(self.get_problem_list_url, params)
self._record_result('get_problem_list', result)
dog_stats_api.histogram(
self._metric_name('get_problem_list.result.length'),
len(result.get('problem_list',[]))
)
return result
def get_notifications(self, course_id, grader_id):
params = {'course_id': course_id, 'student_id': grader_id}
response = self.get(self.get_notifications_url, params)
return self.try_to_decode(response)
def try_to_decode(self, text):
try:
text = json.loads(text)
except:
pass
return text
result = self.get(self.get_notifications_url, params)
self._record_result(
'get_notifications',
result,
tags=['needs_to_peer_grade:{}'.format(result.get('student_needs_to_peer_grade'))]
)
return result
"""
......
common/lib/xmodule/xmodule/peer_grading_module.py
......@@ -539,8 +539,7 @@ class PeerGradingModule(PeerGradingFields, XModule):
error_text = ""
problem_list = []
try:
problem_list_json = self.peer_gs.get_problem_list(self.course_id, self.system.anonymous_student_id)
problem_list_dict = problem_list_json
problem_list_dict = self.peer_gs.get_problem_list(self.course_id, self.system.anonymous_student_id)
success = problem_list_dict['success']
if 'error' in problem_list_dict:
error_text = problem_list_dict['error']
......
lms/djangoapps/open_ended_grading/open_ended_notifications.py
......@@ -165,9 +165,8 @@ def combined_notifications(course, user):
try:
#Get the notifications from the grading controller
controller_response = controller_qs.check_combined_notifications(course.id, student_id, user_is_staff,
notifications = controller_qs.check_combined_notifications(course.id, student_id, user_is_staff,
last_time_viewed)
notifications = json.loads(controller_response)
if notifications.get('success'):
if (notifications.get('staff_needs_to_grade') or
notifications.get('student_needs_to_peer_grade')):
......
lms/djangoapps/open_ended_grading/staff_grading_service.py
......@@ -44,28 +44,28 @@ class MockStaffGradingService(object):
def get_next(self, course_id, location, grader_id):
self.cnt += 1
return json.dumps({'success': True,
'submission_id': self.cnt,
'submission': 'Test submission {cnt}'.format(cnt=self.cnt),
'num_graded': 3,
'min_for_ml': 5,
'num_pending': 4,
'prompt': 'This is a fake prompt',
'ml_error_info': 'ML info',
'max_score': 2 + self.cnt % 3,
'rubric': 'A rubric'})
return {'success': True,
'submission_id': self.cnt,
'submission': 'Test submission {cnt}'.format(cnt=self.cnt),
'num_graded': 3,
'min_for_ml': 5,
'num_pending': 4,
'prompt': 'This is a fake prompt',
'ml_error_info': 'ML info',
'max_score': 2 + self.cnt % 3,
'rubric': 'A rubric'}
def get_problem_list(self, course_id, grader_id):
self.cnt += 1
return json.dumps({'success': True,
'problem_list': [
json.dumps({'location': 'i4x://MITx/3.091x/problem/open_ended_demo1',
'problem_name': "Problem 1", 'num_graded': 3, 'num_pending': 5,
'min_for_ml': 10}),
json.dumps({'location': 'i4x://MITx/3.091x/problem/open_ended_demo2',
'problem_name': "Problem 2", 'num_graded': 1, 'num_pending': 5,
'min_for_ml': 10})
]})
return {'success': True,
'problem_list': [
json.dumps({'location': 'i4x://MITx/3.091x/problem/open_ended_demo1',
'problem_name': "Problem 1", 'num_graded': 3, 'num_pending': 5,
'min_for_ml': 10}),
json.dumps({'location': 'i4x://MITx/3.091x/problem/open_ended_demo2',
'problem_name': "Problem 2", 'num_graded': 1, 'num_pending': 5,
'min_for_ml': 10})
]}
def save_grade(self, course_id, grader_id, submission_id, score, feedback, skipped, rubric_scores,
submission_flagged):
......@@ -77,6 +77,8 @@ class StaffGradingService(GradingService):
Interface to staff grading backend.
"""
METRIC_NAME = 'edxapp.open_ended_grading.staff_grading_service'
def __init__(self, config):
config['system'] = LmsModuleSystem(
static_url='/static',
......@@ -106,7 +108,7 @@ class StaffGradingService(GradingService):
grader_id: who is grading this? The anonymous user_id of the grader.
Returns:
json string with the response from the service. (Deliberately not
dict with the response from the service. (Deliberately not
writing out the fields here--see the docs on the staff_grading view
in the grading_controller repo)
......@@ -114,7 +116,14 @@ class StaffGradingService(GradingService):
GradingServiceError: something went wrong with the connection.
"""
params = {'course_id': course_id, 'grader_id': grader_id}
return self.get(self.get_problem_list_url, params)
result = self.get(self.get_problem_list_url, params)
tags = [u'course_id:{}'.format(course_id)]
self._record_result('get_problem_list', result, tags)
dog_stats_api.histogram(
self._metric_name('get_problem_list.result.length'),
len(result.get('problem_list', []))
)
return result
def get_next(self, course_id, location, grader_id):
"""
......@@ -127,17 +136,25 @@ class StaffGradingService(GradingService):
grader_id: who is grading this? The anonymous user_id of the grader.
Returns:
json string with the response from the service. (Deliberately not
dict with the response from the service. (Deliberately not
writing out the fields here--see the docs on the staff_grading view
in the grading_controller repo)
Raises:
GradingServiceError: something went wrong with the connection.
"""
response = self.get(self.get_next_url,
params={'location': location,
'grader_id': grader_id})
return json.dumps(self._render_rubric(response))
result = self._render_rubric(
self.get(
self.get_next_url,
params={
'location': location,
'grader_id': grader_id
}
)
)
tags = [u'course_id:{}'.format(course_id)]
self._record_result('get_next', result, tags)
return result
def save_grade(self, course_id, grader_id, submission_id, score, feedback, skipped, rubric_scores,
submission_flagged):
......@@ -145,7 +162,7 @@ class StaffGradingService(GradingService):
Save a score and feedback for a submission.
Returns:
json dict with keys
dict with keys
'success': bool
'error': error msg, if something went wrong.
......@@ -162,12 +179,20 @@ class StaffGradingService(GradingService):
'rubric_scores_complete': True,
'submission_flagged': submission_flagged}
return self.post(self.save_grade_url, data=data)
result = self._render_rubric(self.post(self.save_grade_url, data=data))
tags = [u'course_id:{}'.format(course_id)]
self._record_result('save_grade', result, tags)
return result
def get_notifications(self, course_id):
params = {'course_id': course_id}
response = self.get(self.get_notifications_url, params)
return response
result = self.get(self.get_notifications_url, params)
tags = [
u'course_id:{}'.format(course_id),
u'staff_needs_to_grade:{}'.format(result.get('staff_needs_to_grade'))
]
self._record_result('get_notifications', result, tags)
return result
# don't initialize until staff_grading_service() is called--means that just
......@@ -249,7 +274,7 @@ def get_next(request, course_id):
p = request.POST
location = p['location']
return HttpResponse(_get_next(course_id, grader_id, location),
return HttpResponse(json.dumps(_get_next(course_id, grader_id, location)),
mimetype="application/json")
def get_problem_list(request, course_id):
......@@ -278,7 +303,6 @@ def get_problem_list(request, course_id):
_check_access(request.user, course_id)
try:
response = staff_grading_service().get_problem_list(course_id, unique_id_for_user(request.user))
response = json.loads(response)
# If 'problem_list' is in the response, then we got a list of problems from the ORA server.
# If it is not, then ORA could not find any problems.
......@@ -373,14 +397,14 @@ def save_grade(request, course_id):
location = p['location']
try:
result_json = staff_grading_service().save_grade(course_id,
grader_id,
p['submission_id'],
p['score'],
p['feedback'],
skipped,
p.getlist('rubric_scores[]'),
p['submission_flagged'])
result = staff_grading_service().save_grade(course_id,
grader_id,
p['submission_id'],
p['score'],
p['feedback'],
skipped,
p.getlist('rubric_scores[]'),
p['submission_flagged'])
except GradingServiceError:
#This is a dev_facing_error
log.exception(
......@@ -388,9 +412,6 @@ def save_grade(request, course_id):
request, course_id))
#This is a staff_facing_error
return _err_response(STAFF_ERROR_MESSAGE)
try:
result = json.loads(result_json)
except ValueError:
#This is a dev_facing_error
log.exception(
......@@ -406,7 +427,7 @@ def save_grade(request, course_id):
return _err_response(STAFF_ERROR_MESSAGE)
# Ok, save_grade seemed to work. Get the next submission to grade.
return HttpResponse(_get_next(course_id, grader_id, location),
return HttpResponse(json.dumps(_get_next(course_id, grader_id, location)),
mimetype="application/json")
......
lms/djangoapps/open_ended_grading/tests.py
......@@ -45,7 +45,7 @@ class EmptyStaffGradingService(object):
"""
Return a staff grading response that is missing a problem list key.
"""
return json.dumps({'success': True, 'error': 'No problems found.'})
return {'success': True, 'error': 'No problems found.'}
def make_instructor(course, user_email):
......@@ -62,10 +62,9 @@ class StudentProblemListMockQuery(object):
def get_grading_status_list(self, *args, **kwargs):
"""
Get a mock grading status list with locations from the open_ended test course.
@returns: json formatted grading status message.
@returns: grading status message dictionary.
"""
grading_status_list = json.dumps(
{
return {
"version": 1,
"problem_list": [
{
......@@ -95,8 +94,6 @@ class StudentProblemListMockQuery(object):
],
"success": True
}
)
return grading_status_list
@override_settings(MODULESTORE=TEST_DATA_MIXED_MODULESTORE)
......
lms/djangoapps/open_ended_grading/utils.py
......@@ -118,12 +118,10 @@ class StudentProblemList(object):
self.success = False
try:
#Get list of all open ended problems that the grading server knows about
problem_list_json = self.controller_qs.get_grading_status_list(self.course_id, self.user_id)
problem_list_dict = self.controller_qs.get_grading_status_list(self.course_id, self.user_id)
except GradingServiceError:
log.error("Problem contacting open ended grading service " + self.course_error_ending)
return self.success
try:
problem_list_dict = json.loads(problem_list_json)
except ValueError:
log.error("Problem with results from external grading service for open ended" + self.course_error_ending)
return self.success
......
lms/djangoapps/open_ended_grading/views.py
......@@ -197,8 +197,7 @@ def flagged_problem_list(request, course_id):
# Make a service that can query edX ORA.
controller_qs = create_controller_query_service()
try:
problem_list_json = controller_qs.get_flagged_problem_list(course_id)
problem_list_dict = json.loads(problem_list_json)
problem_list_dict = controller_qs.get_flagged_problem_list(course_id)
success = problem_list_dict['success']
if 'error' in problem_list_dict:
error_text = problem_list_dict['error']
......@@ -326,7 +325,7 @@ def take_action_on_flags(request, course_id):
controller_qs = create_controller_query_service()
try:
response = controller_qs.take_action_on_flags(course_id, student_id, submission_id, action_type)
return HttpResponse(response, mimetype="application/json")
return HttpResponse(json.dumps(response), mimetype="application/json")
except GradingServiceError:
log.exception(
u"Error taking action on flagged peer grading submissions, "
......
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