Google App Engine - Task Queue Names and Transactions

Question

In the Google App Engine documentation it says below (see here).

Transactional tasks must not have user-specified names.

Are tasks within transactions automatically assigned names or is there some other reason for this?

Answer 1

The reason for this is that task names are themselves transactional, and it's not possible to combine the two atomic operations (the datastore transaction and obtaining the task name) into a single atomic transaction.