| 解决日志log4j，slf4j,logback冲突问题 | 您所在的位置：网站首页 › logback log4j冲突 › 解决日志log4j，slf4j,logback冲突问题 |
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问题描述： 启动tomcat，发现tomcat无法启动，catalina.out有如下错误日志：INFO [localhost-startStop-1] org.apache.catalina.core.ApplicationContext.log Closing Spring root WebApplicationContext SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.listenerStop Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.NoClassDefFoundError: Could not initialize class org.apache.log4j.Log4jLoggerFactory at org.apache.log4j.LogManager.getLogger(LogManager.java:44) at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:73) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:270) at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:156) at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:132) at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:274) at org.springframework.web.context.ContextCleanupListener.(ContextCleanupListener.java:43) at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:145) at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4860) at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5495) at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:224) at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:159) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1407) at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1397) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)问题分析： 检查lib库下面，发现今天更新过log4j和logback组合，总共有如下包：slf4j-api-1.7.5.jar slf4j-log4j12-1.6.1.jar log4j-1.2.16.jar log4j-over-slf4j-1.7.5.jar logback-core-1.1.2.jar logback-classic-1.1.2.jar 通过查询资料发现，包slf4j-log4j12-1.6.1.jar 和log4j有冲突。 解决方法： 删除后正常，删除这个：slf4j-log4j12-1.6.1.jar附件常见组合： log4j+slf4j slf4j-api-1.7.5.jar slf4j-log4j12-1.6.1.jar log4j-1.2.16.jar slf4j+logback logback-core-1.1.2.jar logback-classic-1.1.2.jar slf4j-api-1.7.5.jar |
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