the method config.executor_identity is injected into configuration by Socorro's TaskManager.  We don't have that class here.  The pooled connections pool thread by name.  If you do not specify a name it defaults to using the thread's name.  This ensures that in a multithreaded environment connections don't get shared between threads.  

When this crontabber is used in Socorro, we should disallow the use of the local connection context class in favor of Socorro's that will have the appropriate executor_identity method.