quartz-scheduler - Quartz 调度器 : JOB Executed more than once

Question

我正在使用 quartz 调度程序来安排我的工作。我用过 CronTrigger。但问题是触发器被多次触发。这是我设置 cron 调度程序的代码..

SchedulerFactory schFactory = new StdSchedulerFactory();
        Scheduler sched = null;
        CronTrigger cronTrigger = null;
        try {
            sched = schFactory.getScheduler();
            JobDetail jobDetail = new JobDetail("job1", "group1",SchedulerPBGC.class);

            String cronTimerStr = "* 16 15 * * ? *";

            LOG.warn("CRON TRIGGER FORMAT  FOR PROCESSING PB GC DATA:"+cronTimerStr);

            cronTrigger = new CronTrigger("SchedTrigger", "Group1", cronTimerStr);


            sched.scheduleJob(jobDetail, cronTrigger);          
            sched.start();

            LOG.warn("SCHEDULER REGISTERED FOR PROCESSING PB GC DATA :  TIME :"+cronTimerStr);          

        } catch (SchedulerException se) {
            LOG.error("SchedulerException Message::"+se.getLocalizedMessage());     
        }

在这里，我的调度程序执行了 10 次作业......在这里你可以看到日志......

2012-06-20 15:16:50,001 DefaultQuartzScheduler_Worker-1 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:50,001 DefaultQuartzScheduler_Worker-1 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:50,001 DefaultQuartzScheduler_Worker-1 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:51,001 DefaultQuartzScheduler_Worker-2 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:51,001 DefaultQuartzScheduler_Worker-2 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:51,001 DefaultQuartzScheduler_Worker-2 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:52,001 DefaultQuartzScheduler_Worker-3 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:52,001 DefaultQuartzScheduler_Worker-3 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:52,001 DefaultQuartzScheduler_Worker-3 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:53,001 DefaultQuartzScheduler_Worker-4 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:53,001 DefaultQuartzScheduler_Worker-4 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:53,001 DefaultQuartzScheduler_Worker-4 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:54,001 DefaultQuartzScheduler_Worker-5 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:54,001 DefaultQuartzScheduler_Worker-5 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:54,001 DefaultQuartzScheduler_Worker-5 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:55,001 DefaultQuartzScheduler_Worker-6 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:55,001 DefaultQuartzScheduler_Worker-6 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:55,001 DefaultQuartzScheduler_Worker-6 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:56,001 DefaultQuartzScheduler_Worker-7 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:56,001 DefaultQuartzScheduler_Worker-7 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:56,001 DefaultQuartzScheduler_Worker-7 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:57,001 DefaultQuartzScheduler_Worker-8 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:57,001 DefaultQuartzScheduler_Worker-8 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:57,001 DefaultQuartzScheduler_Worker-8 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:58,001 DefaultQuartzScheduler_Worker-9 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:58,001 DefaultQuartzScheduler_Worker-9 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:58,001 DefaultQuartzScheduler_Worker-9 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED-----------------------
2012-06-20 15:16:59,001 DefaultQuartzScheduler_Worker-10 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION STARTED-----------------------
2012-06-20 15:16:59,001 DefaultQuartzScheduler_Worker-10 WARN  test.SchedulerPBGC - The value of NO_OF_BEFORE_DAY_TO_RUN must be less then zero ..to start the scheduler
2012-06-20 15:16:59,001 DefaultQuartzScheduler_Worker-10 WARN  test.SchedulerPBGC - ----------PB GC SCHEDULER EXECUTION COMPLETED--------------------

如何将 CronTimer 迭代器设置为 1 ？或如何停止调度程序多次执行作业。

有什么建议吗？
谢谢，
古詹·沙阿。

Answer 1

我得到了解决方案..

我使用的 cron 语法是: String cronTimerStr = "* 16 15 * * ? *";

在这里，在 15:16 时间，Quartz 将每秒初始化所有可能的工作线程。因此，假设在一分钟内(@ 16 分 60 秒)，它将初始化最多 60 个线程。

我将第二个参数设置为零。
所以新的语法是“0 16 15 * * ? *”。

现在它工作正常。

谢谢，
古詹·沙阿。