java.lang.RuntimeException: ErrCode:-400, ErrMsg:Could not initialize class com.alibaba.nacos..的解决办法

问题概述

项目中加入注册中心，注册中心组件使用的是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，alibaba-nacos连接初始化失败，

“ Could not initialize class com.alibaba.nacos.common.remote.client.grpc.GrpcSdkClient ”，

如下图：

具体信息如下：

java.lang.RuntimeException: ErrCode:-400, ErrMsg:Could not initialize class com.alibaba.nacos.common.remote.client.grpc.GrpcSdkClient
	at com.alibaba.cloud.nacos.NacosServiceManager.createNewNamingService(NacosServiceManager.java:102)
	at com.alibaba.cloud.nacos.NacosServiceManager.buildNamingService(NacosServiceManager.java:90)
	at com.alibaba.cloud.nacos.NacosServiceManager.getNamingService(NacosServiceManager.java:46)
	at com.alibaba.cloud.nacos.discovery.NacosWatch.stop(NacosWatch.java:173)
	at com.alibaba.cloud.nacos.discovery.NacosWatch.destroy(NacosWatch.java:204)
	at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:213)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:587)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:559)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1161)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:520)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1154)
	at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1106)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:596)
	at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145)
	at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:740)
	at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:415)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1312)
	at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301)
	at com.huazai.bayou.admin.BayouMallAdminApplication.main(B...Application.java:12)
Caused by: com.alibaba.nacos.api.exception.NacosException: java.lang.reflect.InvocationTargetException
	at com.alibaba.nacos.api.naming.NamingFactory.createNamingService(NamingFactory.java:61)
	at com.alibaba.nacos.api.NacosFactory.createNamingService(NacosFactory.java:77)
	at com.alibaba.cloud.nacos.NacosServiceManager.createNewNamingService(NacosServiceManager.java:99)
	... 19 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
	at com.alibaba.nacos.api.naming.NamingFactory.createNamingService(NamingFactory.java:59)
	... 21 common frames omitted
Caused by: java.lang.NoClassDefFoundError: Could not initialize class com.alibaba.nacos.common.remote.client.grpc.GrpcSdkClient
	at com.alibaba.nacos.common.remote.client.RpcClientFactory.lambda$createClient$0(RpcClientFactory.java:81)
	at java.base/java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1705)
	at com.alibaba.nacos.common.remote.client.RpcClientFactory.createClient(RpcClientFactory.java:79)
	at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.<init>(NamingGrpcClientProxy.java:87)
	at com.alibaba.nacos.client.naming.remote.NamingClientProxyDelegate.<init>(NamingClientProxyDelegate.java:76)
	at com.alibaba.nacos.client.naming.NacosNamingService.init(NacosNamingService.java:95)
	at com.alibaba.nacos.client.naming.NacosNamingService.<init>(NacosNamingService.java:81)
	... 26 common frames omitted

解决办法

经过分析，初步判断，这个nacos的初始化问题，

是由于 版本兼容问题导致的，因为之前有过版本升级，

基本环境，

JDK 11

Spring Boot 2.6.6

Alibaba Nacos 2021.0.4.0

兼容版本对应：

按照上面的版本依赖，理论上是可以正常运行的，

但，alibaba-nacos:2021.0.4.0中的nacos-client版本与nacos-server版本冲突，导致初始化失败，

问题定位到了，

首先，忽略原alibaba-nacos下的nacos-client（可忽略，要求严谨，还是要去掉的）

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

手动导入nacos-client新版本，

        <dependency>
            <groupId>com.alibaba.nacos</groupId>
            <artifactId>nacos-client</artifactId>
            <version>2.3.2</version>
        </dependency>

新增依赖后，Reload All Maven Projects

如下图：

 现在nacos-client即可正常的初始化了！！！

如下图：

参考文档

【Spring Boot 版本序列】

【Spring Cloud 版本序列】

【spring-cloud-alibaba 版本说明】

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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/140499845
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！