On Tue, 20 Aug 2019, hw wrote:
is it somehow possible to make CUPS automatically redirect jobs, and following jobs, away from printers which can not print them to other printers that can print them until the printers that couldn't print them are again able to print them?
IIRC CUPS has printer classes or some such thing. A user can send a job to a class and CUPS will direct it within that class as it sees fit. Presumaly if one printer is stil chewing on last week's job, CUPS will see fit to direct subsequent jobs elsewhere.