SLF4J：java.lang.IllegalStateException：无法成功初始化org.slf4j.LoggerFactory

问题描述

我的pom文件中有以下maven依赖关系：

I have the following maven dependency in my pom file:

<!-- depends on slf4j-api, log4j -->
<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>1.6.4</version>
</dependency>

当我将项目部署到tomcat时，我收到错误消息：

When I deploy the project into tomcat, I am getting the error message:

SEVERE: Exception sending context destroyed event to listener instance of class org.springframework.web.context.ContextLoaderListener
java.lang.ExceptionInInitializerError
    at org.springframework.web.context.ContextLoaderListener.contextDestroyed(ContextLoaderListener.java:80)
    at org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4819)
    at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5466)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:160)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:895)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:871)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:615)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:958)
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1599)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
    at java.util.concurrent.FutureTask.run(FutureTask.java:166)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.IllegalStateException: org.slf4j.LoggerFactory could not be successfully initialized. See also http://www.slf4j.org/codes.html#unsuccessfulInit
    at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:288)
    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:252)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155)
    at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:131)
    at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685)
    at org.springframework.web.context.ContextCleanupListener.<clinit>(ContextCleanupListener.java:43)
    ... 16 more

当我查看部署的war文件在战争档案中我看到以下罐子（其中包括）：

When I look at the deployed war file, I see in the war file the following jars (among others):

slf4j-api-1.6.4.jar
slf4j-log4j12-1.6.4.jar

奇怪的是，我不看到任何 log4j.jar （即使它是 slf4j-log4j12-1.6.4.jar的依赖

The strange thing is, that I don't see there any log4j.jar (even though it's a dependency of slf4j-log4j12-1.6.4.jar

问题：

1. 为什么是 log4j.jar 不包含在战争文件中？

1. Why was log4j.jar not packed in the war file?

错误信息是什么意思，以及如何解决方案

What does the error message mean and how to solve it?

推荐答案

文件在存储库中。删除Maven存储库中的整个 log4j 目录修复它，一旦我做了Maven>更新依赖关系，并重新下载它们。

I had this issue due to a bad jar file in the repository. Deleting the entire log4j directory in the Maven repository fixed it once I did Maven > Update Dependencies and it re-downloaded them.

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