The total bucket count always is one for ExceptionCircuitBreaker and ResponseTimeCircuitBreaker, why？

[ashore0805]

Issue Description

public ResponseTimeCircuitBreaker(DegradeRule rule) {
    this(rule, new SlowRequestLeapArray(1, rule.getStatIntervalMs()));
}


public ExceptionCircuitBreaker(DegradeRule rule) {
    this(rule, new SimpleErrorCounterLeapArray(1, rule.getStatIntervalMs()));
}

[LearningGp]

IMO, CircuitBreaker does not need multiple buckets for pulsed traffic scenarios, reusing a single bucket is sufficient.