com.alibaba.nacos.api.exception.NacosException: user not found! 的解决办法

问题概述

项目中加入注册中心，注册中心组建使用的是Alibaba Nacos，

依赖包：

        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <version>2021.0.4.0</version>
        </dependency>

配置加入完成后，项目启动编译通过，

但，注册服务的时候，错误，用户未找到，

错误信息： “ com.alibaba.nacos.api.exception.NacosException: user not found! ” ，

如下图：

具体错误新信息如下：

org.springframework.context.ApplicationContextException: Failed to start bean 'webServerStartStop'; nested exception is java.lang.reflect.UndeclaredThrowableException
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.18.jar:5.3.18]
	at java.base/java.lang.Iterable.forEach(Iterable.java:75) ~[na:na]
	at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.6.jar:2.6.6]
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740) ~[spring-boot-2.6.6.jar:2.6.6]
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415) ~[spring-boot-2.6.6.jar:2.6.6]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303) ~[spring-boot-2.6.6.jar:2.6.6]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312) ~[spring-boot-2.6.6.jar:2.6.6]
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.6.jar:2.6.6]
	at com.huazai.bayou.admin.BayouMallAdminApplication.main(Ba...Application.java:12) ~[classes/:na]
Caused by: java.lang.reflect.UndeclaredThrowableException: null
	at org.springframework.util.ReflectionUtils.rethrowRuntimeException(ReflectionUtils.java:147) ~[spring-core-5.3.18.jar:5.3.18]
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:82) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.register(AbstractAutoServiceRegistration.java:232) ~[spring-cloud-commons-3.1.4.jar:3.1.4]
	at com.alibaba.cloud.nacos.registry.NacosAutoServiceRegistration.register(NacosAutoServiceRegistration.java:78) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.start(AbstractAutoServiceRegistration.java:133) ~[spring-cloud-commons-3.1.4.jar:3.1.4]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.bind(AbstractAutoServiceRegistration.java:98) ~[spring-cloud-commons-3.1.4.jar:3.1.4]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:86) ~[spring-cloud-commons-3.1.4.jar:3.1.4]
	at org.springframework.cloud.client.serviceregistry.AbstractAutoServiceRegistration.onApplicationEvent(AbstractAutoServiceRegistration.java:47) ~[spring-cloud-commons-3.1.4.jar:3.1.4]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:421) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:378) ~[spring-context-5.3.18.jar:5.3.18]
	at org.springframework.boot.web.servlet.context.WebServerStartStopLifecycle.start(WebServerStartStopLifecycle.java:46) ~[spring-boot-2.6.6.jar:2.6.6]
	at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.18.jar:5.3.18]
	... 14 common frames omitted
Caused by: com.alibaba.nacos.api.exception.NacosException: user not found!
	at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.requestToServer(NamingGrpcClientProxy.java:359) ~[nacos-client-2.2.3.jar:na]
	at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.doRegisterService(NamingGrpcClientProxy.java:210) ~[nacos-client-2.2.3.jar:na]
	at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.registerService(NamingGrpcClientProxy.java:124) ~[nacos-client-2.2.3.jar:na]
	at com.alibaba.nacos.client.naming.remote.NamingClientProxyDelegate.registerService(NamingClientProxyDelegate.java:98) ~[nacos-client-2.2.3.jar:na]
	at com.alibaba.nacos.client.naming.NacosNamingService.registerInstance(NacosNamingService.java:143) ~[nacos-client-2.2.3.jar:na]
	at com.alibaba.cloud.nacos.registry.NacosServiceRegistry.register(NacosServiceRegistry.java:74) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
	... 27 common frames omitted

解决办法

关于这个问题，

是因为在安装配置nacos-server时，配置开启了授权认真，

如果没有修改过配置，可以在nacos-server配置文件的，第145行找到，

### If turn on auth system:
nacos.core.auth.enabled=true

如下图：

找到问题所在了，这里有两个解决办法：

1、关闭鉴权（不推荐，因为不安全）

直接修改关闭鉴权，auth=false，

### If turn on auth system:
nacos.core.auth.enabled=false

2、项目配置nacos登录账户信息（推荐）

spring.cloud.nacos.username
spring.cloud.nacos.password

如下图：

新增配置nacos登录账户信息后，就可成功启动了，

如下图：

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好了，关于 com.alibaba.nacos.api.exception.NacosException: user not found! 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。

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作       者：	华    仔
联系作者：	who.seek.me@java98k.vip
来        源：	优快云 (Chinese Software Developer Network)
原        文：	https://blog.youkuaiyun.com/Hello_World_QWP/article/details/140495048
版权声明：	本文为博主原创文章，请在转载时务必注明博文出处！