Unfortunately the Datastore gives sometimes timeout exceptions on operations. You can catch them and take some action, like retry the operation. Or let the user know in a friendly manner. There has been a post of a retry decorator on 25-aug-2009.
When you are wrapping your put() and get() operations in try-except wrappers for Timeout exceptions, also do it for the CapabilityDisabled exception in case the Datastore is in read-only mode during maintenance. 2009/8/27 Nevin Freeman <nevin.free...@gmail.com>: > > I am getting the following traceback: > > Traceback (most recent call last): > File "/base/python_lib/versions/1/google/appengine/ext/webapp/ > __init__.py", line 507, in __call__ > handler.get(*groups) > File "/base/data/home/apps/riabizdev/1.335829215948087052/ > handlers.py", line 197, in get > banner_code = models.Banner.get_by_id(int > (banner_id)).get_code_and_log_impression() > File "/base/data/home/apps/riabizdev/1.335829215948087052/ > models.py", line 209, in get_code_and_log_impression > self.put() > File "/base/python_lib/versions/1/google/appengine/ext/db/ > __init__.py", line 725, in put > return datastore.Put(self._entity) > File "/base/python_lib/versions/1/google/appengine/api/ > datastore.py", line 166, in Put > raise _ToDatastoreError(err) > File "/base/python_lib/versions/1/google/appengine/api/ > datastore.py", line 2100, in _ToDatastoreError > raise errors[err.application_error](err.error_detail) > Timeout > > And the method in question from models.py is this: > > def get_text(self): > self.counter += 1 > self.put() #this is line 209, where the error > originates > return self.text > > > Is this a common problem that I can do something to avoid? > Alternatively, could someone show me the syntax to make this fail > gracefully? (I think I've seen an example before, but don't remember > where to find it). > > Thanks in advance-- > Nevin Freeman > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
