BackgroundIn distributed systems, there is one effect where the unavailability of one service or some services will lead to the service unavailability of the whole system, this is called service avalanche effect. A common way to prevent service avalanche is do manual service fallback, in fact Hystrix also provides another option beside this.Definition of Service Avalanche EffectService avalanche effect is a kind of effect where the service provider fails to provide service which causes the service caller also fail to work. And this kind of service unavailability will propagate to the whol...