The tasks are not run transactionally, and in my testing the task is the only one in queue. In fact, I also ran the tests *somewhat* successfully on a separate app where this was the only code running. I say somewhat because, as I stated in my original post, the 20-second delays didn't happen every time; more like once every four requests. But when they did occur, it was almost precisely 20 seconds.
Below is the entirety of my handler: class AdhocHandler2(webapp.RequestHandler): def get(self): task_create_time = datetime.datetime.now() import string task_create_time_s = task_create_time.strftime("%Y-%m-%d %H:%M:%S") + "." + string.zfill(task_create_time.microsecond, 6) t = taskqueue.Task(url='/batch/adhoc', params={'task_create_time': task_create_time_s}, target='overnight-external-data', method='GET') t.add(queue_name = 'overnight-tasks') -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To view this discussion on the web visit https://groups.google.com/d/msg/google-appengine/-/orTdYjTm7SkJ. 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.