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1.项目启动报错

2024-12-12 16:56:14.195 [34mINFO  [0;39m [35m2638221[0;39m ---[main] [] [36mc.a.n.p.a.s.c.ClientAuthPluginManager    ->    56[0;39m : [ClientAuthPluginManager] Load ClientAuthService com.alibaba.nacos.client.auth.ram.RamClientAuthServiceImpl success.
2024-12-12 16:56:14.677 [1;31mERROR [0;39m [35m2638221[0;39m ---[main] [] [36mo.s.boot.SpringApplication               ->   834[0;39m : Application run failed
java.lang.IllegalStateException: Logback configuration error detected: 
ERROR in ch.qos.logback.classic.joran.action.ContextNameAction - Failed to rename context [cbsp-mock] as [server.name_IS_UNDEFINED] java.lang.IllegalStateException: Context has been already given a name
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.loadConfiguration(LogbackLoggingSystem.java:169)
	at org.springframework.boot.logging.AbstractLoggingSystem.initializeWithConventions(AbstractLoggingSystem.java:80)
	at org.springframework.boot.logging.AbstractLoggingSystem.initialize(AbstractLoggingSystem.java:60)
	at org.springframework.boot.logging.logback.LogbackLoggingSystem.initialize(LogbackLoggingSystem.java:118)
	at org.springframework.boot.context.logging.LoggingApplicationListener.initializeSystem(LoggingApplicationListener.java:306)
	at org.springframework.boot.context.logging.LoggingApplicationListener.initialize(LoggingApplicationListener.java:281)
	at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEnvironmentPreparedEvent(LoggingApplicationListener.java:239)
	at org.springframework.boot.context.logging.LoggingApplicationListener.onApplicationEvent(LoggingApplicationListener.java:216)
	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:127)
	at org.springframework.boot.context.event.EventPublishingRunListener.environmentPrepared(EventPublishingRunListener.java:80)
	at org.springframework.boot.SpringApplicationRunListeners.environmentPrepared(SpringApplicationRunListeners.java:53)
	at org.springframework.boot.SpringApplication.prepareEnvironment(SpringApplication.java:342)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:307)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1247)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1236)
	at com.tuzhanai.cbsp.mock.CbspMockApplication.main(CbspMockApplication.java:28)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.boot.loader.MainMethodRunner.run(MainMethodRunner.java:49)
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:108)
	at org.springframework.boot.loader.Launcher.launch(Launcher.java:58)
	at org.springframework.boot.loader.JarLauncher.main(JarLauncher.java:88)

2.报错分析：

报错的原因也不复杂，依赖冲突导致的。

• SpringBoot框架中已经集成了日志框架Logback，而项目依赖nacos-client中也配置了Logback（nacos-client中的Logback加载要优先于项目自身的Logback框架），在一个项目中context_name只能定义一次。
• 所以，在项目启动时，nacos-client中的Logback先加载完成后，再加载项目本身的Logback时就出现了冲突。
  
  
• logback-spring.xml的文件名称是Logback的默认文件名，加载顺序有时候优先于spring.application.name，所以导致出问题。

3.解决方法

方法1

方法2

改下 context_name 名字 不要重复创建

方法3