We filed a more concise bug report too: https://code.google.com/p/googleappengine/issues/detail?id=8...

This is a daily outage that affects all our master/slave appengine applications. We know these applications are 'deprecated', but we're still paying significant money for the service and therefore hadn't expected 'deprecated' to mean 'won't be fixed when there are problems'.

Migration to HRD is not trivial even with the tool provided by Google. HRD has a different consistency model, blob keys and associated image serving URLs will change by migrating, and last time we checked any deletes that happen during migration (which can take days) will not make it into the migrated app.