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社区首页 >专栏 >2019年发现的第一个bug,速围观

2019年发现的第一个bug,速围观

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用户5166556
发布2019-04-16 14:04:13
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发布2019-04-16 14:04:13
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文章被收录于专栏:让技术和时代并行

问题现象

定时任务注册job执行在tomcat下一直提示如下错误,但是在jetty中确正常运行,怀疑跟servlet的加载机制导致如下问题.

错误如下

代码语言:javascript
复制
一月 22, 2019 7:38:30 下午 org.apache.catalina.core.ApplicationContext log
信息: Set web app root system property: 'webapp.root' = [E:\apache-tomcat-6.0.44\webapps\clq\]
一月 22, 2019 7:38:30 下午 org.apache.catalina.core.ApplicationContext log
信息: Initializing Spring root WebApplicationContext
一月 22, 2019 7:39:13 下午 org.apache.catalina.core.StandardContext listenerStart
严重: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jobRegistry' defined in URL [jar:file:/E:/apache-tomcat-6.0.44/webapps/clq/WEB-INF/lib/clq-base-6.0.0.jar!/com/clq/clq/jobs/JobRegistry.class]: Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'activeCleanupJob' defined in URL [jar:file:/E:/apache-tomcat-6.0.44/webapps/clq/WEB-INF/lib/clq-clq-6.0.0.jar!/com/clq/clq/clq/jobs/ActiveCleanupJob.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.clq.clq.clq.jobs.ActiveCleanupJob]: Constructor threw exception; nested exception is java.lang.NullPointerException
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:553)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:772)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:839)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538)
	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:446)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:328)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:107)
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4210)
	at org.apache.catalina.core.StandardContext.start(StandardContext.java:4709)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:802)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:583)
	at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:944)
	at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:779)
	at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:505)
	at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1322)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:325)
	at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1068)
	at org.apache.catalina.core.StandardHost.start(StandardHost.java:822)
	at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1060)
	at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
	at org.apache.catalina.core.StandardService.start(StandardService.java:525)
	at org.apache.catalina.core.StandardServer.start(StandardServer.java:759)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'cleanupJob' defined in URL [jar:file:/E:/apache-tomcat-6.0.44/webapps/clq/WEB-INF/lib/clq-clq-6.0.0.jar!/com/clq/clq/clq/jobs/CleanupJob.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.clq.clq.clq.jobs.ActiveCleanupJob]: Constructor threw exception; nested exception is java.lang.NullPointerException
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1105)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1050)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:510)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:202)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:534)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:523)
	at org.springframework.context.support.AbstractApplicationContext.getBeansOfType(AbstractApplicationContext.java:1162)
	at com.clq.clq.jobs.JobRegistry.trigger(JobRegistry.java:39)
	at com.clq.clq.jobs.JobRegistry.setApplicationContext(JobRegistry.java:65)
	at org.springframework.context.support.ApplicationContextAwareProcessor.invokeAwareInterfaces(ApplicationContextAwareProcessor.java:119)
	at org.springframework.context.support.ApplicationContextAwareProcessor.postProcessBeforeInitialization(ApplicationContextAwareProcessor.java:94)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyBeanPostProcessorsBeforeInitialization(AbstractAutowireCapableBeanFactory.java:408)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1570)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545)
	... 35 more
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.clq.clq.clq.jobs.CleanupJob]: Constructor threw exception; nested exception is java.lang.NullPointerException
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163)
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:89)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1098)
	... 52 more
Caused by: java.lang.NullPointerException
	at com.clq.clq.socket.util.BeanUtil.getBean(BeanUtil.java:26)
	at com.clq.clq.clq.jobs.CleanupJob.<init>(ActiveCleanupJob.java:23)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147) 

解决方式:

把job注册类,转移到跟job同一个包下,解决问题。(目前没有找到真正问题原因,如果有知道根源问题,请告知。)

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原始发表:2019年01月23日,如有侵权请联系 cloudcommunity@tencent.com 删除

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目录
  • 问题现象
  • 错误如下
  • 解决方式:
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