1、错误描述
严重: Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.NoClassDefFoundError: org/apache/log4j/spi/ThrowableInformation
at org.apache.log4j.spi.LoggingEvent.<init>(LoggingEvent.java:165)
at org.apache.log4j.Category.forcedLog(Category.java:391)
at org.apache.log4j.Category.log(Category.java:856)
at org.apache.commons.logging.impl.Log4JLogger.error(Log4JLogger.java:229)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:543)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:516)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:827)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:485)
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:921)
at org.springframework.context.support.AbstractApplicationContext.doClose(AbstractApplicationContext.java:895)
at org.springframework.context.support.AbstractApplicationContext.close(AbstractApplicationContext.java:841)
at org.springframework.web.context.ContextLoader.closeWebApplicationContext(ContextLoader.java:579)
at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:115)
at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4776)
at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5390)
at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
at org.apache.catalina.core.StandardContext.reload(StandardContext.java:3739)
at org.apache.catalina.startup.HostConfig.reload(HostConfig.java:1363)
at org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1336)
at org.apache.catalina.startup.HostConfig.check(HostConfig.java:1534)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:285)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:117)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.ContainerBase.backgroundProcess(ContainerBase.java:1141)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1377)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.processChildren(ContainerBase.java:1381)
at org.apache.catalina.core.ContainerBase$ContainerBackgroundProcessor.run(ContainerBase.java:1349)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.apache.log4j.spi.ThrowableInformation
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1313)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1164)
... 28 more
四月 10, 2017 10:52:56 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesJdbc
警告: The web application [cmp] registered the JDBC driver [com.alibaba.druid.proxy.DruidDriver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
四月 10, 2017 10:52:56 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesJdbc
警告: The web application [cmp] registered the JDBC driver [com.mysql.jdbc.Driver] but failed to unregister it when the web application was stopped. To prevent a memory leak, the JDBC Driver has been forcibly unregistered.
四月 10, 2017 10:52:56 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
警告: The web application [cmp] appears to have started a thread named [Abandoned connection cleanup thread] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Object.wait(Native Method)
java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:143)
com.mysql.jdbc.AbandonedConnectionCleanupThread.run(AbandonedConnectionCleanupThread.java:43)
四月 10, 2017 10:52:56 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
警告: The web application [cmp] appears to have started a thread named [Druid-ConnectionPool-Create-1065348511] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:1824)
四月 10, 2017 10:52:56 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
警告: The web application [cmp] appears to have started a thread named [Druid-ConnectionPool-Destroy-1065348511] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Thread.sleep(Native Method)
com.alibaba.druid.pool.DruidDataSource$DestroyConnectionThread.run(DruidDataSource.java:1898)
四月 10, 2017 10:52:56 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
警告: The web application [cmp] appears to have started a thread named [shiroCache] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
java.lang.Object.wait(Native Method)
java.lang.Object.wait(Object.java:502)
java.util.TimerThread.mainLoop(Timer.java:526)
java.util.TimerThread.run(Timer.java:505)
四月 10, 2017 10:52:56 下午 org.apache.catalina.loader.WebappClassLoaderBase clearReferencesThreads
警告: The web application [cmp] appears to have started a thread named [SessionValidationThread-1] but has failed to stop it. This is very likely to create a memory leak. Stack trace of thread:
sun.misc.Unsafe.park(Native Method)
java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:215)
java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2078)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:1093)
java.util.concurrent.ScheduledThreadPoolExecutor$DelayedWorkQueue.take(ScheduledThreadPoolExecutor.java:809)
java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1067)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1127)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
java.lang.Thread.run(Thread.java:745)2、错误原因
在项目启动时，出现这个错误，由错误提示可知是缺少jar，有关log4j的
3、解决办法
（1）检查Maven有没有将log4j有关jar下载下来
（2）重新编译项目，利用mvn clean install
（3）重新启动Tomcat服务器