Not necessarily. I've been at some places where you just "do it live." We had dozens of worker nodes. An engineer would "reserve" one for debugging purposes, ed

Not necessarily. I've been at some places where you just "do it live." We had dozens of worker nodes. An engineer would "reserve" one for debugging purposes, editing python code live, adding logs or prints as needed and restarting services. Worst case a small percentage of requests was lost, though generally they would be retried except in the most extreme cases. This risk was considered acceptable. Obviously, depending on the business and maturity level of the company, this could be a big no-no. In general, I find those "wild west" environments more fun. Waiting for an hour long build, deploys, and "approvals" to add a couple of prints is a big drag.