Oops, I posted this twice to the -dev board, not once there and again here -- sorry!
CMS is about to release a new version of WMAgent based entirely on python 3. They have asked that they be able to update our agent by Monday evening (23/08), so I will not inject any new workflows before the upgrade. I expect the job queue to drain by late on Sunday.
Please set your CMS application to no new tasks by then.

More...