public String toString() {
        StringBuilder sb = new StringBuilder();
        sb.append("{NFLoadBalancer:name=").append(this.getName())
                .append(",current list of Servers=").append(this.allServerList)
                .append(",Load balancer stats=")
                .append(this.lbStats.toString()).append("}");
        return sb.toString();
    }
Class that contains the mechanism to "ping" all the instances

@author stonse
ribbon-loadbalancer/src/main/java/com/netflix/loadbalancer/BaseLoadBalancer.java