EJB调度程序比配置运行更多

Question

例如，我有一个计划程序，应该每天在晚上9点运行一次。调度程序完全在配置的时间运行，但完成后将再次顺序运行2次

@Singleton
@Startup
public class TestScheduler {



     @Schedule(hour = "21", minute = "0", second = "0", dayOfWeek = "*", persistent = false, info = "Every 9pm")
    public void run(Timer timer) {

        System.out.println("Hi");
    }


}