今天在springboot項目中替換log4j2日志的時候遇見的問題，閑話不多說。
錯誤日志
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Logging system failed to initialize using configuration from 'classpath:log4j2-dev.xml'java.lang.IllegalStateException: Logback configuration error detected: ERROR in ch.qos.logback.core.joran.spi.Interpreter@3:16 - no applicable action for [appenders], current ElementPath is [[configuration][appenders]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@4:67 - no applicable action for [Console], current ElementPath is [[configuration][appenders][Console]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@5:96 - no applicable action for [PatternLayout], current ElementPath is [[configuration][appenders][Console][PatternLayout]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@10:119 - no applicable action for [RollingFile], current ElementPath is [[configuration][appenders][RollingFile]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@11:96 - no applicable action for [PatternLayout], current ElementPath is [[configuration][appenders][RollingFile][PatternLayout]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@12:23 - no applicable action for [Policies], current ElementPath is [[configuration][appenders][RollingFile][Policies]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@13:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@14:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@16:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@21:79 - no applicable action for [RollingFile], current ElementPath is [[configuration][appenders][RollingFile]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@22:96 - no applicable action for [PatternLayout], current ElementPath is [[configuration][appenders][RollingFile][PatternLayout]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@23:23 - no applicable action for [Policies], current ElementPath is [[configuration][appenders][RollingFile][Policies]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@24:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@25:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@27:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@28:79 - no applicable action for [ThresholdFilter], current ElementPath is [[configuration][appenders][RollingFile][ThresholdFilter]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@32:14 - no applicable action for [loggers], current ElementPath is [[configuration][loggers]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@36:64 - no applicable action for [logger], current ElementPath is [[configuration][loggers][logger]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@37:42 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@38:43 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@39:44 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@43:77 - no applicable action for [logger], current ElementPath is [[configuration][loggers][logger]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@44:42 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@50:28 - no applicable action for [root], current ElementPath is [[configuration][loggers][root]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@52:42 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][root][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@53:43 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][root][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@54:44 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][root][appender-ref]] at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:162) at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithSpecificConfig(AbstractLoggingSystem.java:66) at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:56) at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:114) at org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:309) at org.springframework.boot.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:277) at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:240) at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:213) at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122) at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74) at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54) at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:325) at org.springframework.boot.SpringApplication.run(SpringApplication.java:296) at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:121) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83) at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:189) at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:131) at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)java.lang.IllegalStateException: Failed to load ApplicationContext at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124) at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83) at org.springframework.test.context.web.ServletTestExecutionListener.setUpRequestContextIfNecessary(ServletTestExecutionListener.java:189) at org.springframework.test.context.web.ServletTestExecutionListener.prepareTestInstance(ServletTestExecutionListener.java:131) at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:228) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:247) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68) at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)Caused by: java.lang.IllegalStateException: java.lang.IllegalStateException: Logback configuration error detected: ERROR in ch.qos.logback.core.joran.spi.Interpreter@3:16 - no applicable action for [appenders], current ElementPath is [[configuration][appenders]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@4:67 - no applicable action for [Console], current ElementPath is [[configuration][appenders][Console]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@5:96 - no applicable action for [PatternLayout], current ElementPath is [[configuration][appenders][Console][PatternLayout]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@10:119 - no applicable action for [RollingFile], current ElementPath is [[configuration][appenders][RollingFile]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@11:96 - no applicable action for [PatternLayout], current ElementPath is [[configuration][appenders][RollingFile][PatternLayout]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@12:23 - no applicable action for [Policies], current ElementPath is [[configuration][appenders][RollingFile][Policies]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@13:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@14:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@16:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@21:79 - no applicable action for [RollingFile], current ElementPath is [[configuration][appenders][RollingFile]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@22:96 - no applicable action for [PatternLayout], current ElementPath is [[configuration][appenders][RollingFile][PatternLayout]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@23:23 - no applicable action for [Policies], current ElementPath is [[configuration][appenders][RollingFile][Policies]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@24:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@25:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@27:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@28:79 - no applicable action for [ThresholdFilter], current ElementPath is [[configuration][appenders][RollingFile][ThresholdFilter]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@32:14 - no applicable action for [loggers], current ElementPath is [[configuration][loggers]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@36:64 - no applicable action for [logger], current ElementPath is [[configuration][loggers][logger]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@37:42 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@38:43 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@39:44 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@43:77 - no applicable action for [logger], current ElementPath is [[configuration][loggers][logger]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@44:42 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@50:28 - no applicable action for [root], current ElementPath is [[configuration][loggers][root]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@52:42 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][root][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@53:43 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][root][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@54:44 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][root][appender-ref]] at org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:316) at org.springframework.boot.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:277) at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:240) at org.springframework.boot.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:213) at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:172) at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:165) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:139) at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:122) at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:74) at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:54) at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:325) at org.springframework.boot.SpringApplication.run(SpringApplication.java:296) at org.springframework.boot.test.context.SpringBootContextLoader.loadContext(SpringBootContextLoader.java:121) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98) at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) ... 24 moreCaused by: java.lang.IllegalStateException: Logback configuration error detected: ERROR in ch.qos.logback.core.joran.spi.Interpreter@3:16 - no applicable action for [appenders], current ElementPath is [[configuration][appenders]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@4:67 - no applicable action for [Console], current ElementPath is [[configuration][appenders][Console]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@5:96 - no applicable action for [PatternLayout], current ElementPath is [[configuration][appenders][Console][PatternLayout]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@10:119 - no applicable action for [RollingFile], current ElementPath is [[configuration][appenders][RollingFile]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@11:96 - no applicable action for [PatternLayout], current ElementPath is [[configuration][appenders][RollingFile][PatternLayout]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@12:23 - no applicable action for [Policies], current ElementPath is [[configuration][appenders][RollingFile][Policies]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@13:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@14:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@16:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@21:79 - no applicable action for [RollingFile], current ElementPath is [[configuration][appenders][RollingFile]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@22:96 - no applicable action for [PatternLayout], current ElementPath is [[configuration][appenders][RollingFile][PatternLayout]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@23:23 - no applicable action for [Policies], current ElementPath is [[configuration][appenders][RollingFile][Policies]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@24:45 - no applicable action for [TimeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][TimeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@25:57 - no applicable action for [SizeBasedTriggeringPolicy], current ElementPath is [[configuration][appenders][RollingFile][Policies][SizeBasedTriggeringPolicy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@27:48 - no applicable action for [DefaultRolloverStrategy], current ElementPath is [[configuration][appenders][RollingFile][DefaultRolloverStrategy]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@28:79 - no applicable action for [ThresholdFilter], current ElementPath is [[configuration][appenders][RollingFile][ThresholdFilter]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@32:14 - no applicable action for [loggers], current ElementPath is [[configuration][loggers]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@36:64 - no applicable action for [logger], current ElementPath is [[configuration][loggers][logger]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@37:42 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@38:43 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@39:44 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@43:77 - no applicable action for [logger], current ElementPath is [[configuration][loggers][logger]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@44:42 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][logger][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@50:28 - no applicable action for [root], current ElementPath is [[configuration][loggers][root]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@52:42 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][root][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@53:43 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][root][appender-ref]]ERROR in ch.qos.logback.core.joran.spi.Interpreter@54:44 - no applicable action for [appender-ref], current ElementPath is [[configuration][loggers][root][appender-ref]] at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:162) at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithSpecificConfig(AbstractLoggingSystem.java:66) at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:56) at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:114) at org.springframework.boot.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:309) ... 38 moreDisconnected from the target VM, address: '127.0.0.1:65035', transport: 'socket'Process finished with exit code -1 |
首先我們看上面的錯誤日志
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Logging system failed to initialize using configuration from 'classpath:log4j2-dev.xml'java.lang.IllegalStateException: Logback configuration error detected: |
如果只看這兩句的話我們可能會認為是我們的日志文件log4j2-dev.xml配置錯了，或者路徑找不到，其實不然。正解是我們pom文件配置的有問題，jar包存在沖突，下面來看下我們的pom文件吧
pom.xml
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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-log4j2</artifactId> </dependency> |
上面的pom文件是最初報錯時的配置文件，看上面的配置文件貌似沒有問題，我們需使用log4j2日志的starter也已經引入了，但是這里我們需要注意一點就是我們在引入spring-boot-starter-web包的時候他里面默認使用了logback日志，這樣就會產生日志包的沖突，其實不只是starter-web包默認引入的logback還有很多的包默認引入的logback包，看下圖
上圖中是這個pom文件的jiar包結構示意圖，log4j2部分就是我們新引入的spring-boot-starter-log4j2包，上圖中我通過黃線畫出了現在系統中所有logback的引入，可以看出所有引用，這里涉及到幾個包，分別是web包，mybatis包，jdbc包。那我們現在要解決jar包沖突的問題是不是需要每個包下都排除默認引用的logger日志呢，理論上是完全沒有問題的，但是那樣豈不是很費事，2種解決辦法。
解決辦法1
統一排除
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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-logging</artifactId> </exclusion> </exclusions> </dependency> |
解決辦法2
那我只導用了web包，不想導入spring-boot-starter能不能解決呢？
答 ： 能
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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> <exclusions> <exclusion> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-logging</artifactId> </exclusion> </exclusions> </dependency> |
看見第二個解決辦法，問題是不是來了。很多包都默認使用的logback,你單獨排除了web包是不是還會出現這個問題，
答 ： 是的會出現，這里就需要知道pom文件的加載順序了，pom文件的加載順序也是從上至下執行，那么我們就需要把web包放到pom文件中的第一位，在向下執行的時候也會排除所有的默認logger了。
上面就是兩種解決辦法。希望能給大家一個參考，也希望大家多多支持服務器之家。
原文鏈接：https://blog.csdn.net/m0_37034294/article/details/82801294
