Quartz 调度程序无法获取 JNDI DB 资源但仍然启动

Posted 2023-03-25

【中文标题】Quartz 调度程序无法获取 JNDI DB 资源但仍然启动

【英文标题】：Quartz scheduler failed to get JNDI DB resource but starts anyway

【发布时间】：2014-12-15 08:53:23

【问题描述】：

我正在使用 QuartzInitializerListener 在我的 tomcat 8 中初始化 Quartz 调度程序。

当 Quartz 无法连接到我的数据库（JNDI 资源）时：

15-Dec-2014 09:26:58.201 INFO [http-nio-8080-exec-10] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /home/.../ org.quartz.SchedulerConfigException: Failure occured during job recovery. [See nested exception: org.quartz.JobPersistenceException: Failed to obtain DB connection from data source 'DBConnectionPool': java.sql.SQLException: Could not retrieve datasource via JNDI url 'java:comp/env/jdbc/DBConnectionPool' java.sql.SQLException: Cannot create PoolableConnectionFactory (Communications link failure

它无论如何都会根据quartz.propertiesn 启动。它没有做任何事情......但如果发生这种情况，我希望 Quartz 停止！

我怎样才能做到这一点？

问候 塞巴斯蒂安

【问题讨论】：

您希望石英停止或整个应用程序停止

@dev 这两个选项对我来说都可以。如果有任何选项可以处理 QuartzInitializerListener 的此错误，它也将是合适的。

【参考方案1】：

您可以像这样使用自定义类，而不是使用quartzlistner。 将其用作满足您要求的骨架

@WebServlet(value="/QuartzTest",loadOnStartup=1)
public class QuartzInit extends HttpServlet 
    private static final long serialVersionUID = 1L;
    public static int count=0;

    /**
     * @see HttpServlet#HttpServlet()
     */
    public QuartzInit() 
        super();

        // TODO Auto-generated constructor stub
        try 

       System.out.println("TRying to start Quartz");

            JobDetail job = JobBuilder.newJob(AppCheckerJob.class)
                .withIdentity("AppCrawlerJob", "InfraStatus_Group").build();

            JobDetail job_email = JobBuilder.newJob(EmailJob.class)
                    .withIdentity("AppCrawlerEmailJob", "InfraStatus_Group").build();


            Trigger trigger = TriggerBuilder
                .newTrigger()
                .withIdentity("AppCrawlerJobTRigger", "InfraStatus_Group")
                .withSchedule(        


                                CronScheduleBuilder.cronSchedule("0 /15 * * * ?")


                ).build();

            Trigger trigger_email = TriggerBuilder
                    .newTrigger()
                    .withIdentity("AppCrawlerEmailJobTRigger", "InfraStatus_Group")
                    .withSchedule(        


                            CronScheduleBuilder.dailyAtHourAndMinute(13,16)
                    ).build();


            // schedule it
            Scheduler scheduler = new StdSchedulerFactory().getScheduler();

            scheduler.start();

            //if (sched.checkExists(job.getKey())) sched.rescheduleJob(trigger.getKey(), trigger);  else sched.scheduleJob(job, trigger);  

            if(scheduler.checkExists(job.getKey()))
                System.out.println("deleting old job netry");
                scheduler.deleteJob(job.getKey());
                //scheduler.rescheduleJob(trigger.getKey(), trigger);
            
            if(scheduler.checkExists(job_email.getKey()))
                System.out.println("deleting old email job netry");
                scheduler.deleteJob(job_email.getKey());
                //scheduler.rescheduleJob(trigger.getKey(), trigger);
            



            scheduler.scheduleJob(job, trigger);            
            scheduler.scheduleJob(job_email, trigger_email);




         catch (Exception se) 
            se.printStackTrace();
           throw new RuntimeException("Error while initializing quartz!!!");
        

    

    /**
     * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
        // TODO Auto-generated method stub
    

    /**
     * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException 
        // TODO Auto-generated method stub
    

【讨论】：

这对我来说似乎更像是一种解决方法。没有改变石英行为的选项吗？

Quartz 有很多未知的行为，这就是为什么我总是自己初始化石英的原因。我希望你能找到一些标准的方法来处理它。

最后我几分钟前在网上找到了一个解决方案：link你可以使用调度器监听器

感谢您提供的信息，我也会尝试使用它。