A circuit breaker could prematurely cut off all requests to a service, even if only one shard was failing.
They only circuit break retries ?
If a single node is down, then it should not receive traffic via k8s or whatever you use to route based on liveness probe.
Why does your software need to retry anyways? I prefer not implementing live retries, stuff breaks sometimes. Tasks will retry themselves.
You can circuit break the connection to other services so that you stop contacting them if they are down. Giving them some breathing room.
The Wikipedia implem looks simple and good enough to me: https://en.m.wikipedia.org/wiki/Circuit_breaker_design_pattern
These statistics are more biased by our police not accepting the victims' complaints than our justice's definition, or also what we see as socially acceptable. That's why these stats have risen so much in the recent years.
Heck our president met his wife when he was a minor and she was his school teacher, we have ex high government official mixed in incest stories...
As much as it's false to say it's always men, these numbers exist more as a reflection of our justice system and shouldn't be used to infer stats on the society as a whole.