def max_name_length(self):
        return None
Verify updating model.MapreduceState is cmp and set.
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/db/backends/__init__.py/BaseDatabaseOperations.max_name_length--crossover with--dataset/ETHPy150Open GoogleCloudPlatform/appengine-mapreduce/python/test/mapreduce/handlers_test.py/ControllerCallbackHandlerTest.testStateUpdateIsCmpAndSet