spring - Quartz 作业在 Tomcat 6/Ubuntu 10.04LTS 上部署时运行两次

Question

我运行一个基于 Spring Framework/SmartGWT 的 Web 应用程序，现在添加了一个 Quartz 作业。该作业应该每天凌晨 2 点运行，并从数据库表中选出获胜者。从我的日志中我看到它运行了两次，看起来是同时运行的，因为正如您所看到的，日志重叠:

Generating winners of yesterday...
Generating winners of yesterday...
winning id's: 15
done, mail queue is filled.

winning id's: 18
done, mail queue is filled.

我的 applicationContext.xml 如下所示:

<!-- initiates and calls the job -->  
<beans:bean id="GenerateWinnersAndFillMailingQueueJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean"> 
  <beans:property name="targetObject" ref="GenerateWinnersAndFillMailingQueueJobExecutor"/>  
  <beans:property name="targetMethod" value="execute"/> 
</beans:bean>  
<!-- here's where we use the Cron like scheduling expression      to define when the bean is run. -->  
<beans:bean id="GenerateWinnersAndFillMailingQueueJob" class="org.springframework.scheduling.quartz.CronTriggerBean"> 
  <beans:property name="jobDetail" ref="GenerateWinnersAndFillMailingQueueJobDetail"/>  
  <!-- run every morning at 2AM -->  
  <beans:property name="cronExpression" value="0 0 2 * * ?"/> 
</beans:bean> 
... another quartz jobs is defined here, omitted for clarity ...
<beans:bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean"> 
  <beans:property name="triggers"> 
    <beans:list> 
      <beans:ref bean="GenerateWinnersAndFillMailingQueueJob"/>  
      <beans:ref bean="SendEmailsFromMailQueueJob"/> 
    </beans:list> 
  </beans:property> 
</beans:bean> 

我真的不明白这里有什么问题，这是一个非常简单的用例。当我在带有 GWT 开发模式的服务器上进行本地测试时，它确实有效。仅当部署到 Ubuntu 10.04 LTS 上的 Tomcat6 时，我才会遇到此问题。

有什么想法吗？

** 编辑:在评论提示后，增加日志级别，似乎 Spring 运行了两次。重启tomcat服务器可以看到实例化了两个Spring，相隔4秒左右。

2011-08-29 08:49:22,567 {ABSOLUTE}  INFO XmlWebApplicationContext,Thread-9:1002 - Closing Root WebApplicationContext: startup date [Sun Aug 28 20:53:39 CEST 2011]; root of context hierarchy
2011-08-29 08:49:22,569 {ABSOLUTE}  INFO DefaultLifecycleProcessor,Thread-9:345 - Stopping beans in phase 2147483647
2011-08-29 08:49:22,589 {ABSOLUTE}  INFO QuartzScheduler,Thread-9:537 - Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED paused.
2011-08-29 08:49:22,592 {ABSOLUTE}  INFO DefaultListableBeanFactory,Thread-9:422 - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@12e14ebc: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,MerchantSimpleJsonWebservice,merchantDao,AdvertisementSimpleJsonWebservice,advertisementDao,ContactFormSubmitsSimpleJsonWebservice,contactFormSubmitsDao,PlayerCustomJsonWebservice,PlayerCustomJsonWebserviceImpl,submitSolutionDao,GenerateWinnersAndFillMailingQueueJobExecutor,GenerateWinnersAndFillMailingQueueJobDetail,GenerateWinnersAndFillMailingQueueJob,SendEmailsFromMailQueueJobExecutor,SendEmailsFromMailQueueJobDetail,SendEmailsFromMailQueueJob,org.springframework.scheduling.quartz.SchedulerFactoryBean#0,org.springframework.security.web.PortMapperImpl#0,org.springframework.security.web.context.HttpSessionSecurityContextRepository#0,org.springframework.security.authentication.ProviderManager#0,org.springframework.security.access.vote.AffirmativeBased#0,org.springframework.security.web.access.intercept.FilterSecurityInterceptor#0,org.springframework.security.web.access.DefaultWebInvocationPrivilegeEvaluator#0,org.springframework.security.authentication.AnonymousAuthenticationProvider#0,org.springframework.security.web.savedrequest.HttpSessionRequestCache#0,org.springframework.security.config.http.UserDetailsServiceInjectionBeanPostProcessor#0,org.springframework.security.filterChainProxy,sessionAuthenticationStrategy,sessionRegistry,propertyConfigurer,org.springframework.security.authentication.dao.DaoAuthenticationProvider#0,org.springframework.security.authentication.DefaultAuthenticationEventPublisher#0,org.springframework.security.authenticationManager,saltSource,dataSource,jdbcTemplate,passwordEncoder,jdbcUserService,loggerListener,formLoginFilter,authenticationEntryPoint,accessDeniedHandler,concurrencyFilter]; root of factory hierarchy
2011-08-29 08:49:22,601 {ABSOLUTE}  INFO SchedulerFactoryBean,Thread-9:760 - Shutting down Quartz Scheduler
2011-08-29 08:49:22,601 {ABSOLUTE}  INFO QuartzScheduler,Thread-9:616 - Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED shutting down.
2011-08-29 08:49:22,602 {ABSOLUTE}  INFO QuartzScheduler,Thread-9:537 - Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED paused.
2011-08-29 08:49:22,603 {ABSOLUTE}  INFO QuartzScheduler,Thread-9:688 - Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED shutdown complete.
2011-08-29 08:49:22,882 {ABSOLUTE}  INFO XmlWebApplicationContext,Thread-9:1002 - Closing Root WebApplicationContext: startup date [Sun Aug 28 20:53:34 CEST 2011]; root of context hierarchy
2011-08-29 08:49:22,883 {ABSOLUTE}  INFO DefaultLifecycleProcessor,Thread-9:345 - Stopping beans in phase 2147483647
2011-08-29 08:49:22,903 {ABSOLUTE}  INFO QuartzScheduler,Thread-9:537 - Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED paused.
2011-08-29 08:49:22,904 {ABSOLUTE}  INFO DefaultListableBeanFactory,Thread-9:422 - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@402fb002: defining beans [org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,MerchantSimpleJsonWebservice,merchantDao,AdvertisementSimpleJsonWebservice,advertisementDao,ContactFormSubmitsSimpleJsonWebservice,contactFormSubmitsDao,PlayerCustomJsonWebservice,PlayerCustomJsonWebserviceImpl,submitSolutionDao,GenerateWinnersAndFillMailingQueueJobExecutor,GenerateWinnersAndFillMailingQueueJobDetail,GenerateWinnersAndFillMailingQueueJob,SendEmailsFromMailQueueJobExecutor,SendEmailsFromMailQueueJobDetail,SendEmailsFromMailQueueJob,org.springframework.scheduling.quartz.SchedulerFactoryBean#0,org.springframework.security.web.PortMapperImpl#0,org.springframework.security.web.context.HttpSessionSecurityContextRepository#0,org.springframework.security.authentication.ProviderManager#0,org.springframework.security.access.vote.AffirmativeBased#0,org.springframework.security.web.access.intercept.FilterSecurityInterceptor#0,org.springframework.security.web.access.DefaultWebInvocationPrivilegeEvaluator#0,org.springframework.security.authentication.AnonymousAuthenticationProvider#0,org.springframework.security.web.savedrequest.HttpSessionRequestCache#0,org.springframework.security.config.http.UserDetailsServiceInjectionBeanPostProcessor#0,org.springframework.security.filterChainProxy,sessionAuthenticationStrategy,sessionRegistry,propertyConfigurer,org.springframework.security.authentication.dao.DaoAuthenticationProvider#0,org.springframework.security.authentication.DefaultAuthenticationEventPublisher#0,org.springframework.security.authenticationManager,saltSource,dataSource,jdbcTemplate,passwordEncoder,jdbcUserService,loggerListener,formLoginFilter,authenticationEntryPoint,accessDeniedHandler,concurrencyFilter]; root of factory hierarchy
2011-08-29 08:49:22,913 {ABSOLUTE}  INFO SchedulerFactoryBean,Thread-9:760 - Shutting down Quartz Scheduler
2011-08-29 08:49:22,914 {ABSOLUTE}  INFO QuartzScheduler,Thread-9:616 - Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED shutting down.
2011-08-29 08:49:22,914 {ABSOLUTE}  INFO QuartzScheduler,Thread-9:537 - Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED paused.
2011-08-29 08:49:22,915 {ABSOLUTE}  INFO QuartzScheduler,Thread-9:688 - Scheduler org.springframework.scheduling.quartz.SchedulerFactoryBean#0_$_NON_CLUSTERED shutdown complete.
2011-08-29 08:49:26,484 {ABSOLUTE}  INFO ContextLoader,main:187 - Root WebApplicationContext: initialization started

随后，似乎启动了两个 Spring 实例:

2011-08-29 08:49:26,484 {ABSOLUTE}  INFO ContextLoader,main:187 - Root WebApplicationContext: initialization started
...
2011-08-29 08:49:31,221 {ABSOLUTE}  INFO ContextLoader,main:187 - Root WebApplicationContext: initialization started

什么可能导致这种情况，该怎么办？

Answer 1

我修复了它，不仅quartz运行了两次，而且我的应用程序也部署了两次。这是因为 Tomcat 文档中的以下内容:

When using automatic deployment, the docBase defined by an XML Context file should be outside of the appBase directory. If this is not the case, difficulties may be experienced deploying the web application or the application may be deployed twice. The deployIgnore attribute can be used to avoid this situation.

Finally, note that if you are defining contexts explicitly in server.xml, you should probably turn off automatic application deployment or specify deployIgnore carefully. Otherwise, the web applications will each be deployed twice, and that may cause problems for the applications.

我遵循了有关如何让 mod_jk 工作的教程，并且 this tutorial包含该缺陷。