SLF4J: Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path

前言

最近在遇到在本地idea跑項目沒有任何問題，但是部署服務器上就會有報jar包依賴衝突的異常如下圖所示：

具體異常可在tomcat下的logs目錄可以查看localhost類型的日誌如下圖所示：
文件裏面具體報錯內容爲：

25-Nov-2019 21:49:41.793 SEVERE [localhost-startStop-1] org.apache.catalina.core.StandardContext.listenerStart Exception sending context initialized event to listener instance of class [org.springframework.web.context.ContextLoaderListener]
 java.lang.ExceptionInInitializerError
        at org.apache.log4j.LogManager.getLogger(LogManager.java:42)
        at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:66)
        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:685)
        at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:269)
        at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
        at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4792)
        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5256)
        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:754)
        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:730)
        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:734)
        at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:985)
        at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1857)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
        at java.util.concurrent.FutureTask.run(FutureTask.java:266)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalStateException: Detected both log4j-over-slf4j.jar AND slf4j-log4j12.jar on the class path, preempting StackOverflowError. See also http://www.slf4j.org/codes.html#log4jDelegationLoop for more details.
        at org.apache.log4j.Log4jLoggerFactory.<clinit>(Log4jLoggerFactory.java:49)
        ... 21 more

可以清晰看出造成問題的原因是log4j-over-slf4j.jar 與 slf4j-log4j12.jar兩者造成了棧內存溢出的異常，所以需要根據本地pom.xml中將其中一個依賴排除即可，我的是註釋掉了slf4j-log4j12.jar的依賴。

再次在Linux服務器啓動項目成功。