石英计划 - 'JobSchedulingDataLoaderPlugin_jobInitializer' 的作业执行异常。

Question

我发现Quartz 1.8.4好像出了点问题。下面是问题的具体内容（似乎对Quartz没有实际影响，只会让日志文件变得混乱）。

问题：为什么会抛出这个异常？

Jun 20, 2012 12:33:29 PM org.quartz.impl.jdbcjobstore.JobStoreSupport storeTrigger
INFO: note: volatile triggers are effectively non-volatile in a clustered environment.
Jun 20, 2012 12:33:29 PM org.quartz.plugins.history.LoggingJobHistoryPlugin jobToBeExecuted
INFO: Job JobSchedulingDataLoaderPlugin.JobSchedulingDataLoaderPlugin_jobInitializer_quartz_jobs_xml fired (by trigger JobSchedulingDataLoaderPlugin.JobSchedulingDataLoaderPlugin_jobInitializer_quartz_jobs_xml) at:  12:33:29 06/20/2012
Jun 20, 2012 12:33:29 PM org.quartz.core.JobRunShell run
INFO: Job JobSchedulingDataLoaderPlugin.JobSchedulingDataLoaderPlugin_jobInitializer_quartz_jobs_xml threw a JobExecutionException: 
org.quartz.JobExecutionException: FileScanListener named 'JobSchedulingDataLoaderPlugin_jobInitializer' not found in SchedulerContext
    at org.quartz.jobs.FileScanJob.execute(FileScanJob.java:83)
    at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)
Jun 20, 2012 12:33:29 PM org.quartz.plugins.history.LoggingJobHistoryPlugin jobWasExecuted
WARNING: Job JobSchedulingDataLoaderPlugin.JobSchedulingDataLoaderPlugin_jobInitializer_quartz_jobs_xml execution failed at  12:33:29 06/20/2012 and reports: FileScanListener named 'JobSchedulingDataLoaderPlugin_jobInitializer' not found in SchedulerContext
org.quartz.JobExecutionException: FileScanListener named 'JobSchedulingDataLoaderPlugin_jobInitializer' not found in SchedulerContext
    at org.quartz.jobs.FileScanJob.execute(FileScanJob.java:83)
    at org.quartz.core.JobRunShell.run(JobRunShell.java:216)
    at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:549)

quartz.properties 文件:

#============================================================================
# Configure Main Scheduler Properties  
#============================================================================

org.quartz.scheduler.instanceName = AcertJobScheduler
org.quartz.scheduler.instanceId = AcertJobScheduler
org.quartz.scheduler.skipUpdateCheck = true

#============================================================================
# Configure ThreadPool  
#============================================================================

org.quartz.threadPool.class = org.quartz.simpl.SimpleThreadPool
org.quartz.threadPool.threadCount = 5
org.quartz.threadPool.threadPriority = 5
org.quartz.threadPool.threadsInheritContextClassLoaderOfInitializingThread = true

#============================================================================
# Configure JobStore  
#============================================================================

org.quartz.jobStore.misfireThreshold = 60000

org.quartz.jobStore.class = org.quartz.impl.jdbcjobstore.JobStoreTX
org.quartz.jobStore.driverDelegateClass = org.quartz.impl.jdbcjobstore.oracle.OracleDelegate
org.quartz.jobStore.useProperties = false
org.quartz.jobStore.dataSource = myDS
org.quartz.jobStore.tablePrefix = QRTZ_

org.quartz.jobStore.isClustered = true
org.quartz.jobStore.clusterCheckinInterval = 20000


#============================================================================
# Configure Datasources  
#============================================================================
<sanitized>

#============================================================================
# Configure Plugins 
#============================================================================
org.quartz.plugin.triggHistory.class = org.quartz.plugins.history.LoggingJobHistoryPlugin

org.quartz.plugin.jobInitializer.class = org.quartz.plugins.xml.XMLSchedulingDataProcessorPlugin
org.quartz.plugin.jobInitializer.fileNames = quartz_jobs.xml
org.quartz.plugin.jobInitializer.failOnFileNotFound = true
org.quartz.plugin.jobInitializer.scanInterval = 0
org.quartz.plugin.jobInitializer.wrapInUserTransaction = false

quartz_jobs.xml 文件：

<?xml version='1.0' encoding='utf-8'?>
<job-scheduling-data xmlns="http://www.quartz-scheduler.org/xml/JobSchedulingData"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.quartz-scheduler.org/xml/JobSchedulingData http://www.quartz-scheduler.org/xml/job_scheduling_data_1_8.xsd"
  version="1.8">


<!-- SAP ACERT Synchronization Job-->
<schedule>
        <job>
            <name>AcertSapImport</name>
            <group>SapImport</group>

            <description>Synchronize the staff information from the HR SAP database
            to the ACERT users table; Locations, and org tree</description>
            <job-class>my.company.acert.sap_import.SapAcertSyncJob</job-class>
        </job>
        <trigger>
            <cron>
                <name>myTrigger</name>
                <group>SapImport</group>
                <job-name>AcertSapImport</job-name>
                <job-group>SapImport</job-group>
                <cron-expression>0 0 1 * * ?</cron-expression>
            </cron>
        </trigger>

        <job>
            <name>Nightly Course Maintenance</name>
            <group>Acert Maintenance</group>
            <description>Activates and deactivates courses and course versions based 
            on their started and end dates.</description>
            <job-class>my.company.acert.job.CourseMaintenanceJob</job-class>
        </job>
        <trigger>
            <cron>
                <name>courseTrigger</name>
                <group>Acert Maintenance</group>
                <job-name>Nightly Course Maintenance</job-name>
                <job-group>Acert Maintenance</job-group>
                <cron-expression>0 0 2 * * ?</cron-expression>
            </cron>
        </trigger>
        <job>
            <name>Historic Backup</name>
            <group>Acert Maintenance</group>
            <description>Runs the stored procedure to take a snapshot of acert at this date.</description>
            <job-class>my.company.acert.job.HistoricBackupJob</job-class>
        </job>
        <trigger>
            <cron>
                <name>historicBackupTrigger</name>
                <group>Acert Maintenance</group>
                <job-name>Historic Backup</job-name>
                <job-group>Acert Maintenance</job-group>
                <cron-expression>0 0 3 1 * ?</cron-expression>
            </cron>
        </trigger>
        <job>
            <name>Parse XMLs for OrgUnit Trees</name>
            <group>Org Tree</group>

            <description>Parses the xml files for the org tree and reporting org tree</description>
            <job-class>my.company.acert.sap_import.ParseTreeXMLJob</job-class>
        </job>
        <trigger>
            <cron>
                <name>parseOrgTreeTrigger</name>
                <group>Org Tree</group>
                <job-name>Parse XMLs for OrgUnit Trees</job-name>
                <job-group>Org Tree</job-group>
                <cron-expression>0 0 2 1 * ?</cron-expression>
            </cron>
        </trigger>
        <job>
            <name>Notify Expiry Courses</name>
            <group>Notifications</group>

            <description>Send email notification to supervisor and learners of current and upcoming course expirations.</description>
            <job-class>my.company.acert.job.NotifyCourseExpiryJob</job-class>
        </job>
        <trigger>
            <cron>
                <name>notifyExpiryCoursesTrigger</name>
                <group>Notifications</group>
                <job-name>Notify Expiry Courses</job-name>
                <job-group>Notifications</job-group>
                <cron-expression>0 0 3 * * ?</cron-expression>
            </cron>
        </trigger>

</schedule>
</job-scheduling-data>

我正在Tomcat 7.0.27上运行此应用。

- Michael Freake

---

似乎调度程序无法找到quartz_jobs.xml文件，因此无法为其建立上下文。但是，您说从.xml中执行作业，这让我想知道如何做到的。要么Quartz本身存在问题，要么在您的配置中存在问题。因此，请通过在最新版本的Quartz上运行它来缩小场景。 - Shailesh Pratapwar

你尝试过使用10的scanInterval吗？还是有同样的警告吗？我猜测它无法锁定文件。 - Mihai Soloi

Answer 1

我调试了代码并发现，当调度程序上下文中找不到监听器名称时会出现此异常。简单来说，请查看您要调用的类文件是否存在于类路径中，并且它们的路径在属性文件中正确设置。一个简单的拼写错误可能会导致此异常。一种简单的方法是首先仅安排一个实例以查看其是否正常工作，然后添加另一个实例并查看警告等情况。

  FileScanListener listener = (FileScanListener)schedCtxt.get(listenerName);

  if(listener == null) {
        throw new JobExecutionException("FileScanListener named '" + 
                    listenerName + "' not found in SchedulerContext");
  }

希望能有所帮助。

- Ankit Zalani