java - quartz 触发器不会立即触发

Question

我想使用 jdbc 数据存储通过quartz调度程序立即执行该作业。然而，即使我使用 now() 进行调度或调用 triggerJob，调度和触发触发之间也有大约 20-30 秒的延迟。

我尝试使用简单的触发器来执行该作业:

JobKey key = //...
        JobDetail jobDetail = newJob(jobBean.getClass())
                .withIdentity(key)
                .usingJobData(new JobDataMap(jobParams))
                .storeDurably()
                .build();

        Trigger trigger = newTrigger()
                .withIdentity(key.getName(), key.getGroup())
                .startNow()
                .withSchedule(SimpleScheduleBuilder.simpleSchedule()
                        .withMisfireHandlingInstructionFireNow()
                        .withRepeatCount(0))
                .build();

        scheduler.scheduleJob(jobDetail, trigger);

我还尝试使用调度程序触发:

 JobKey key = // ...
        JobDetail jobDetail = newJob(jobBean.getClass())
                .withIdentity(key)
                .storeDurably()
                .build();
        scheduler.addJob(jobDetail, true);


        scheduler.triggerJob(key, new JobDataMap(jobParams));

以下是显示延迟的监听器日志。

2019-05-15 13:59:52,066Z  INFO  [nio-8081-exec-2] c.m.f.s.logger.SchedulingListener                  : Job added: newsJobTemplate:1557928791965
2019-05-15 13:59:52,066Z  INFO  [nio-8081-exec-2] c.m.f.s.logger.SchedulingListener                  : Job scheduled: newsJobTemplate:1557928791965
2019-05-15 14:00:18,660Z  INFO  [eduler_Worker-1] c.m.f.s.logger.TriggerStateListener                : Trigger fired: QUARTZ_JOBS.newsJobTemplate:1557928791965 {}
2019-05-15 14:00:18,703Z  INFO  [eduler_Worker-1] c.m.f.s.logger.JobExecutionListener                : Job will be executed: QUARTZ_JOBS.newsJobTemplate:1557928791965
2019-05-15 14:00:19,284Z  INFO  [eduler_Worker-1] c.m.f.s.logger.JobExecutionListener                : Job was executed: QUARTZ_JOBS.newsJobTemplate:1557928791965

Answer 1

我到处都发现了一些碎屑，表明问题与交易有关。所以我从服务方法中删除了@Transactional，瞧它起作用了。看起来当您调用触发器时，调度程序线程会异步尝试从数据库查找调度和触发器，但当时事务尚未提交。随后调度程序线程再次查找数据库，最终找到了它。