My work is mostly in distributed real-time systems. All of the really hard debugging problems (e.g., race conditions) occur in situations where you can't pause

My work is mostly in distributed real-time systems. All of the really hard debugging problems (e.g., race conditions) occur in situations where you can't pause one of the components with a debugger or you won't be able to repeat the problem. In those cases, logging events and studying them right after repeating the problem is your only recourse.