So far, I had 2 serious problems while using the hub (one of them the Tornado 6 one) – and the logs are quite often unhelpful even on DEBUG level. As soon as the notebook server / kernel is involved, you somehow stare into a black hole. Am I missing something, like a “write a log” setting for the notebook part?
What I assembled so far is here. And while manually starting a notebook server sometimes helps, I’d prefer something less disruptive.