This is a specification that delineates how an arbitrary HTTP client should communicate with a circuit breaker so that it can know when to retry requests while the circuit breaker is in an OPEN (i.e. full-open & half-open) state and when the circuit breaker transitions to a CLOSED state. Remember, the circuit breaker is a reverse proxy that forwards requests to a target server/service in such a way that does not require the HTTP client to blindly send retry requests.
There are 2 ways in which the circu