registerHealthIndicator = true enables Resilience4j to fill in the health endpoint with information regarding the state of its circuit breakers.

allowHealthIndicatorToFail = false tells Resilience4j not to affect the status of the health endpoint. This means that the health endpoint will still report "UP" even if one of the component's circuit breakers is in an open or half-open state. It is very important that the health state of the component is not reported as "DOWN" just because one of its circuit breakers is not in a closed state. This means that the component is still considered to be OK, even though one of the components it depends on is not.