quartz有状态Job总是只执行一次

[haixiang710]

因为系统要求某些job不能并发执行,所以用到quartz的有状态JOB StatefulJob.

但是很奇怪的是,每次该JOB只会执行一次就不再执行,而改成无状态JOB接口就没问题.

不知道什么原因?无论怎么弄,有状态JOB都只执行一次.

public class SimpleJob implements StatefulJob
{
  public void execute(JobExecutionContext context) throws  JobExecutionException
  {
    System.out.println("begin execute...");
    System.out.println("end execute...");
  }
}

public static void main(String [] args)   
{   
   try{   
     Scheduler scher = StdSchedulerFactory.getDefaultScheduler();   
     Calendar cal =  Calendar.getInstace();   
     cal.add(Calendar.SECOND,1);   
     Trigger trigger = new SimpleTrigger("JD","JD",cal.getTime (),null,5,3000L);   
     JobDetail jobDetail = new JobDetail("JD","JD",SimpleJob.class);   
     scher.scheduleJob(jobDetaill,trigger);   
     scher.start();   
   }catch(Exception ex){   
        ex.printStackTrade();   
   }   
}  

[zhangqinhappy]

没明白啥是有状态的JOB，啥是无状态的JOB

[haixiang710]

自己发现执行一次后,trigger_state会变成error.
不知道为什么会这样