It gets very annoying when web app keeps hanging on server requests, only to fail with a timeout few seconds later. Or uses up all available network connections (remember, we only have handful of these) just to wait for failure. Especially if feature is non critical and it does many updates while you are interacting with the app. Wouldn’t it be nicer if, after failing, app simply stopped trying for some time? Giving backend service a chance to get healthy again. Or just to stop pissing off the user. Circuit breaker is what you need to get exactly that. What’s...