nds item not stored warning about nds HOT 4 CLOSED

Your understanding is correct. It's usually the result of an expiry of some item. This won't affect consistency or entity persistence and you can safely ignore it. If these errors appear really frequently it probably means there has been a forced purge of your data by Google or the memcache API is having trouble. They usually resolve in minutes. You don't need to do anything.

If any memcache error would affect consistency then it will be bubbled up in the form of an error by the API. Such is the case for example when attempting to delete an entity and nds is not able to get confirmation from memcache that the memcache item has also been deleted.

from nds.

Your understanding is correct. It's usually the result of an expiry of some item. This won't affect consistency or entity persistence and you can safely ignore it. If these errors appear really frequently it probably means there has been a forced purge of your data by Google or the memcache API is having trouble. They usually resolve in minutes. You don't need to do anything.

If any memcache error would affect consistency then it will be bubbled up in the form of an error by the API. Such is the case for example when attempting to delete an entity and nds is not able to get confirmation from memcache that the memcache item has also been deleted.

from nds.

Thanks @jongillham. In a related question, based on your experience, do you know if these sorts of warnings are less common with the paid memcache service vs. the free one?

from nds.

Sorry I don't know. The free tier has always been adequate for my apps. You could have a go for a couple of days and see what happens.

from nds.