Are you working on a Nuclear Reactor or something that will cause loss of life if rebooted accidentally? If yes, then you have a truly critical system that needs very careful uptime management, despite huge costs to carefully derisk and duplicate it, and there's plenty of good advice here already. But too many systems are 'super pets' like this and are mistakenly considered critical at exorbitant cost.

If no: turn it off and on, and see. The simple fact of the matter is that sooner or later it will happen anyway, and its better to bring that about, learn and solve. And if it results in large financial losses for extended downtime, then the management that allowed it to get to that state is already at fault (not you) and some better, safer alternative will arise from your efforts. Don't sweat it.