Spring Boot整合Nacos时遇到 Failed to rename context [logback] as [nacos] 的解决办法

ゝ一世哀愁。 2023-01-15 04:58 103阅读 0赞

> ### 问题概述 ###

在进行项目开发过程中，通过Spring Boot整合Alibaba Nacos的服务注册与发现和配置中心时，遇到个梗，启动时打印出一串错误日志信息 “ **Failed to rename context \[logback\] as \[nacos\] java.lang.IllegalStateException: Context has been already given a name**” ，但是不会影响项目的正常运行和使用，

如下图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvX1dvcmxkX1FXUA_size_16_color_FFFFFF_t_70][]

具体错误信息如下：

2021-04-21 18:03:57.947 INFO [main]s.d.s.web.PropertySourcedRequestMappingHandlerMapping.initHandlerMethods:69 -Mapped URL path [/v2/api-docs] onto method [springfox.documentation.swagger2.web.Swagger2Controller#getDocumentation(String, HttpServletRequest)]
    2021-04-21 18:03:57.982 INFO [main]o.s.scheduling.concurrent.ThreadPoolTaskExecutor.initialize:181 -Initializing ExecutorService 'applicationTaskExecutor'
    2021-04-21 18:03:58.250 INFO [main]o.s.scheduling.concurrent.ThreadPoolTaskScheduler.initialize:181 -Initializing ExecutorService 'Nacso-Watch-Task-Scheduler'
    18:03:58,258 |-INFO in ch.qos.logback.core.joran.spi.ConfigurationWatchList@748aa7dc - URL [jar:file:/D:/LOCAL_INSTALLER/apache-maven-3.6.3/.m2/repository/com/alibaba/nacos/nacos-client/1.1.4/nacos-client-1.1.4.jar!/nacos-logback.xml] is not of type file
    18:03:58,259 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - debug attribute not set
    18:03:58,259 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Will scan for changes in [jar:file:/D:/LOCAL_INSTALLER/apache-maven-3.6.3/.m2/repository/com/alibaba/nacos/nacos-client/1.1.4/nacos-client-1.1.4.jar!/nacos-logback.xml] 
    18:03:58,259 |-INFO in ch.qos.logback.classic.joran.action.ConfigurationAction - Setting ReconfigureOnChangeTask scanning period to 30 seconds
    18:03:58,260 |-INFO in ch.qos.logback.classic.joran.action.ContextNameAction - Setting logger context name as [nacos]
    18:03:58,260 |-ERROR in ch.qos.logback.classic.joran.action.ContextNameAction - Failed to rename context [logback] as [nacos] java.lang.IllegalStateException: Context has been already given a name
    	at java.lang.IllegalStateException: Context has been already given a name
    	at 	at ch.qos.logback.core.ContextBase.setName(ContextBase.java:194)
    	at 	at ch.qos.logback.classic.LoggerContext.setName(LoggerContext.java:107)
    	at 	at ch.qos.logback.classic.joran.action.ContextNameAction.body(ContextNameAction.java:31)
    	at 	at ch.qos.logback.core.joran.spi.Interpreter.callBodyAction(Interpreter.java:289)
    	at 	at ch.qos.logback.core.joran.spi.Interpreter.characters(Interpreter.java:172)
    	at 	at ch.qos.logback.core.joran.spi.EventPlayer.play(EventPlayer.java:57)
    	at 	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:165)
    	at 	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:152)
    	at 	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:110)
    	at 	at ch.qos.logback.core.joran.GenericConfigurator.doConfigure(GenericConfigurator.java:53)
    	at 	at ch.qos.logback.classic.util.ContextInitializer.configureByResource(ContextInitializer.java:75)
    	at 	at com.alibaba.nacos.client.logging.logback.LogbackNacosLogging.loadConfiguration(LogbackNacosLogging.java:44)
    	at 	at com.alibaba.nacos.client.utils.LogUtils.<clinit>(LogUtils.java:47)
    	at 	at com.alibaba.nacos.client.naming.utils.InitUtils$1.call(InitUtils.java:56)
    	at 	at com.alibaba.nacos.client.naming.utils.InitUtils$1.call(InitUtils.java:52)
    	at 	at com.alibaba.nacos.client.utils.TemplateUtils.stringEmptyAndThenExecute(TemplateUtils.java:43)
    	at 	at com.alibaba.nacos.client.naming.utils.InitUtils.initNamespaceForNaming(InitUtils.java:52)
    	at 	at com.alibaba.nacos.client.naming.NacosNamingService.init(NacosNamingService.java:88)
    	at 	at com.alibaba.nacos.client.naming.NacosNamingService.<init>(NacosNamingService.java:84)
    	at 	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    	at 	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    	at 	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    	at 	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    	at 	at com.alibaba.nacos.api.naming.NamingFactory.createNamingService(NamingFactory.java:45)
    	at 	at com.alibaba.nacos.api.NacosFactory.createNamingService(NacosFactory.java:76)
    	at 	at com.alibaba.cloud.nacos.NacosDiscoveryProperties.namingServiceInstance(NacosDiscoveryProperties.java:486)
    	at 	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.<init>(NacosServiceRegistry.java:47)
    	at 	at com.alibaba.cloud.nacos.registry.NacosServiceRegistryAutoConfiguration.nacosServiceRegistry(NacosServiceRegistryAutoConfiguration.java:51)
    	at 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at 	at java.lang.reflect.Method.invoke(Method.java:498)

> ### 解决办法 ###

经过了一系列的烧脑摸索，一无所获，后，在官方文档上找到了相关问题的阐述（不是解决办法），然后再结合以往经验，终于把问题给解决了。

原来，在基于Spring Boot框架项目开发过程中，集成了Alibaba Nacos的服务注册与发现和配置中心，

因为Spring Boot本身已经集成了日志框架Logback，而在Alibaba Nacos中又集成了一套Logback框架（我顶你个肺，Alibaba Nacos给我们开发者们留了这么大一个坑），

而Alibaba Nacos中的Logback加载要优先于项目自身的Logback框架，在一个项目中其context\_name只能定义一次，

所以，在项目启动时，Alibaba Nacos的Logback先加载完成后，再加载项目本身的Logback时就出现了冲突，报错误日志 “ **Failed to rename context \[logback\] as \[nacos\] java.lang.IllegalStateException: Context has been already given a name** ” ，但是不影响使用，

虽然不影响使用，但是作为一个传统的老码畜，看着这个错误日志，实在不爽，所以博主把它个消灭了，

解决这个，只要禁用掉其中一个Logback就可以了，一般禁用外部框架夹带的Logback即可 ，在启动类中加入如下段代码即可：

System.setProperty("nacos.logging.default.config.enabled","false");

完整示例：

@EnableDiscoveryClient
    @EnableFeignClients
    @EnableSwagger2
    @MapperScan({"com....*.mapper","com.....system.*.mapper","com.....*.mapper"})
    @SpringBootApplication(scanBasePackages = {"com.....","com....."})
    public class ApplicationName {
    
        public static void main(String[] args) {
            System.setProperty("nacos.logging.default.config.enabled","false");
    
            SpringApplication.run(ApplicationName.class, args);
    
        }
    
    }

解决后就能成功启动了，如下图；

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvX1dvcmxkX1FXUA_size_16_color_FFFFFF_t_70 1][]

参考文献：

【[alibaba-nacos][]】

--------------------

好了，关于 Spring Boot整合Nacos时遇到Failed to rename context \[logback\] as \[nacos\] 的解决办法  就写到这儿了，如果还有什么疑问或遇到什么问题欢迎扫码提问，也可以给我留言哦，我会一一详细的解答的。   
歇后语：“ 共同学习，共同进步 ”，也希望大家多多关注CSND的IT社区。

--------------------

<table> 
 <tbody> 
  <tr> 
   <td>作&nbsp; &nbsp; &nbsp; &nbsp;者：</td> 
   <td>华 &nbsp; &nbsp;仔</td> 
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   <td>who.seek.me@java98k.vip</td> 
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   <td>原&nbsp; &nbsp; &nbsp; &nbsp; 文：</td> 
   <td><a href="https://blog.csdn.net/Hello_World_QWP/article/details/115969198" rel="nofollow">https://blog.csdn.net/Hello_World_QWP/article/details/115969198</a></td> 
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvX1dvcmxkX1FXUA_size_16_color_FFFFFF_t_70]: /images/20221022/d243a6ef89b6407cb4756c0577000e6b.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L0hlbGxvX1dvcmxkX1FXUA_size_16_color_FFFFFF_t_70 1]: /images/20221022/758863398972482da1c39a40ddca0c94.png
[alibaba-nacos]: https://github.com/alibaba/nacos/issues/1959