今天学习 nacos 的时候出现了一个错误, jar 包依赖冲突, 用的 cloud 和 springboot 的版本较高, 记录一下解决问题的全过程
这是父工程的依赖
<properties>
<ruoyi.version>3.6.1</ruoyi.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
<spring-boot.version>2.7.3</spring-boot.version>
<spring-cloud.version>2021.0.4</spring-cloud.version>
<spring-cloud-alibaba.version>2021.0.4.0</spring-cloud-alibaba.version>
<spring-boot-admin.version>2.7.5</spring-boot-admin.version>
<spring-boot.mybatis>2.2.2</spring-boot.mybatis>
<swagger.fox.version>3.0.0</swagger.fox.version>
<swagger.core.version>1.6.2</swagger.core.version>
<tobato.version>1.27.2</tobato.version>
<kaptcha.version>2.3.2</kaptcha.version>
<pagehelper.boot.version>1.4.5</pagehelper.boot.version>
<druid.version>1.2.12</druid.version>
<dynamic-ds.version>3.5.2</dynamic-ds.version>
<commons.io.version>2.11.0</commons.io.version>
<commons.fileupload.version>1.4</commons.fileupload.version>
<velocity.version>2.3</velocity.version>
<fastjson.version>2.0.14</fastjson.version>
<jjwt.version>0.9.1</jjwt.version>
<minio.version>8.2.2</minio.version>
<poi.version>4.1.2</poi.version>
<commons-collections.version>3.2.2</commons-collections.version>
<transmittable-thread-local.version>2.13.2</transmittable-thread-local.version>
<lombok.version>1.18.4</lombok.version>
</properties>
<!-- 依赖声明 -->
<dependencyManagement>
<dependencies>
<!-- SpringCloud 微服务 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- SpringCloud Alibaba 微服务 -->
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-alibaba-dependencies</artifactId>
<version>${spring-cloud-alibaba.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- SpringBoot 依赖配置 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-dependencies</artifactId>
<version>${spring-boot.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
<!-- FastDFS 分布式文件系统 -->
<dependency>
<groupId>com.github.tobato</groupId>
<artifactId>fastdfs-client</artifactId>
<version>${tobato.version}</version>
</dependency>
<!-- Mybatis 依赖配置 -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>${spring-boot.mybatis}</version>
</dependency>
<!-- Swagger 依赖配置 -->
<dependency>
<groupId>io.swagger</groupId>
<artifactId>swagger-models</artifactId>
<version>${swagger.core.version}</version>
</dependency>
<dependency>
<groupId>io.swagger</groupId>
<artifactId>swagger-annotations</artifactId>
<version>${swagger.core.version}</version>
</dependency>
<!-- 验证码 -->
<dependency>
<groupId>com.github.penggle</groupId>
<artifactId>kaptcha</artifactId>
<version>${kaptcha.version}</version>
</dependency>
<!-- pagehelper 分页插件 -->
<dependency>
<groupId>com.github.pagehelper</groupId>
<artifactId>pagehelper-spring-boot-starter</artifactId>
<version>${pagehelper.boot.version}</version>
</dependency>
<!-- io常用工具类 -->
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>${commons.io.version}</version>
</dependency>
<!-- excel工具 -->
<dependency>
<groupId>org.apache.poi</groupId>
<artifactId>poi-ooxml</artifactId>
<version>${poi.version}</version>
</dependency>
<!-- 文件上传工具类 -->
<dependency>
<groupId>commons-fileupload</groupId>
<artifactId>commons-fileupload</artifactId>
<version>${commons.fileupload.version}</version>
</dependency>
<!-- 代码生成使用模板 -->
<dependency>
<groupId>org.apache.velocity</groupId>
<artifactId>velocity-engine-core</artifactId>
<version>${velocity.version}</version>
</dependency>
<!-- Collection 增强Java集合框架 -->
<dependency>
<groupId>commons-collections</groupId>
<artifactId>commons-collections</artifactId>
<version>${commons-collections.version}</version>
</dependency>
<!-- JSON 解析器和生成器 -->
<dependency>
<groupId>com.alibaba.fastjson2</groupId>
<artifactId>fastjson2</artifactId>
<version>${fastjson.version}</version>
</dependency>
<!-- JWT -->
<dependency>
<groupId>io.jsonwebtoken</groupId>
<artifactId>jjwt</artifactId>
<version>${jjwt.version}</version>
</dependency>
<!-- 线程传递值 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>transmittable-thread-local</artifactId>
<version>${transmittable-thread-local.version}</version>
</dependency>
<!-- <dependency>-->
<!-- <groupId>junit</groupId>-->
<!-- <artifactId>junit</artifactId>-->
<!-- <version>4.12</version>-->
<!-- <scope>test</scope>-->
<!-- </dependency>-->
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>${lombok.version}</version>
<scope>provided</scope>
</dependency>
</dependencies>
</dependencyManagement>
<dependencies>
<!-- bootstrap 启动器 -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>
</dependencies>
文章比较长, 先把结论写出来, 加入依赖, 和配置
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>
spring.cloud.loadbalancer.ribbon.enabled=false
spring.cloud.loadbalancer.nacos.enabled=true
这是子工程的依赖, 子工程是按照 nacos 官网 example 来的
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
<version>2.2.7.RELEASE</version>
<!-- <exclusions>-->
<!-- <exclusion>-->
<!-- <groupId>com.google.guava</groupId>-->
<!-- <artifactId>guava</artifactId>-->
<!-- </exclusion>-->
<!-- </exclusions>-->
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-openfeign</artifactId>
</dependency>
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
<exclusions>
<exclusion>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
</dependency>
</dependencies>
然后这是通过 idea 的 maven diagram 功能显示的依赖图
nacos server 的版本是2.1.1
通过报错和依赖冲突大致猜测是 guava 的版本问题
尝试 nacos-client 里或 netfilx-ribbon 里去掉 guava 依赖
最后发现去掉 ribbon 里的启动成功了
这是启动类
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.web.client.RestTemplate;
@SpringBootApplication
@EnableDiscoveryClient
public class NacosConsumerApplication {
@LoadBalanced
@Bean
public RestTemplate restTemplate() {
return new RestTemplate();
}
public static void main(String[] args) {
SpringApplication.run(NacosConsumerApplication.class, args);
}
}
这是启动报错
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) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
at com.alibaba.cloud.nacos.NacosServiceManager.buildNamingService(NacosServiceManager.java:90) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
at com.alibaba.cloud.nacos.NacosServiceManager.getNamingService(NacosServiceManager.java:46) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
at com.alibaba.cloud.nacos.discovery.NacosWatch.stop(NacosWatch.java:173) [spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
at com.alibaba.cloud.nacos.discovery.NacosWatch.destroy(NacosWatch.java:204) [spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:213) [spring-beans-5.3.22.jar:5.3.22]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:587) [spring-beans-5.3.22.jar:5.3.22]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:559) [spring-beans-5.3.22.jar:5.3.22]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:1163) [spring-beans-5.3.22.jar:5.3.22]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:520) [spring-beans-5.3.22.jar:5.3.22]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:1156) [spring-beans-5.3.22.jar:5.3.22]
at org.springframework.context.support.AbstractApplicationContext.destroyBeans(AbstractApplicationContext.java:1106) [spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:596) [spring-context-5.3.22.jar:5.3.22]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) [spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) [spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) [spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) [spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) [spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) [spring-boot-2.7.3.jar:2.7.3]
at com.study.ming.NacosConsumerApplication.main(NacosConsumerApplication.java:23) [classes/:na]
Caused by: com.alibaba.nacos.api.exception.NacosException: java.lang.reflect.InvocationTargetException
at com.alibaba.nacos.api.naming.NamingFactory.createNamingService(NamingFactory.java:61) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.api.NacosFactory.createNamingService(NacosFactory.java:77) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.cloud.nacos.NacosServiceManager.createNewNamingService(NacosServiceManager.java:99) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
... 19 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_181]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_181]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_181]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_181]
at com.alibaba.nacos.api.naming.NamingFactory.createNamingService(NamingFactory.java:59) ~[nacos-client-2.0.4.jar:na]
... 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$0(RpcClientFactory.java:81) ~[nacos-client-2.0.4.jar:na]
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_181]
at com.alibaba.nacos.common.remote.client.RpcClientFactory.createClient(RpcClientFactory.java:79) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.<init>(NamingGrpcClientProxy.java:87) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.client.naming.remote.NamingClientProxyDelegate.<init>(NamingClientProxyDelegate.java:76) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.client.naming.NacosNamingService.init(NacosNamingService.java:95) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.client.naming.NacosNamingService.<init>(NacosNamingService.java:81) ~[nacos-client-2.0.4.jar:na]
... 26 common frames omitted
2022-10-27 11:20:32.847 INFO 12908 --- [ main] o.apache.catalina.core.StandardService : Stopping service [Tomcat]
2022-10-27 11:20:32.856 INFO 12908 --- [ main] ConditionEvaluationReportLoggingListener :
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2022-10-27 11:20:32.880 ERROR 12908 --- [ main] o.s.boot.SpringApplication : Application run failed
org.springframework.context.ApplicationContextException: Failed to start bean 'nacosWatch'; nested exception is java.lang.RuntimeException: ErrCode:-400, ErrMsg:com.google.common.collect.Sets$SetView.iterator()Lcom/google/common/collect/UnmodifiableIterator;
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.22.jar:5.3.22]
at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_181]
at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.22.jar:5.3.22]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:147) ~[spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:734) [spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:408) [spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) [spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1306) [spring-boot-2.7.3.jar:2.7.3]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1295) [spring-boot-2.7.3.jar:2.7.3]
at com.study.ming.NacosConsumerApplication.main(NacosConsumerApplication.java:23) [classes/:na]
Caused by: java.lang.RuntimeException: ErrCode:-400, ErrMsg:com.google.common.collect.Sets$SetView.iterator()Lcom/google/common/collect/UnmodifiableIterator;
at com.alibaba.cloud.nacos.NacosServiceManager.createNewNamingService(NacosServiceManager.java:102) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
at com.alibaba.cloud.nacos.NacosServiceManager.buildNamingService(NacosServiceManager.java:90) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
at com.alibaba.cloud.nacos.NacosServiceManager.getNamingService(NacosServiceManager.java:46) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
at com.alibaba.cloud.nacos.discovery.NacosWatch.start(NacosWatch.java:130) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.22.jar:5.3.22]
... 14 common frames omitted
Caused by: com.alibaba.nacos.api.exception.NacosException: java.lang.reflect.InvocationTargetException
at com.alibaba.nacos.api.naming.NamingFactory.createNamingService(NamingFactory.java:61) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.api.NacosFactory.createNamingService(NacosFactory.java:77) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.cloud.nacos.NacosServiceManager.createNewNamingService(NacosServiceManager.java:99) ~[spring-cloud-starter-alibaba-nacos-discovery-2021.0.4.0.jar:2021.0.4.0]
... 18 common frames omitted
Caused by: java.lang.reflect.InvocationTargetException: null
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[na:1.8.0_181]
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[na:1.8.0_181]
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[na:1.8.0_181]
at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[na:1.8.0_181]
at com.alibaba.nacos.api.naming.NamingFactory.createNamingService(NamingFactory.java:59) ~[nacos-client-2.0.4.jar:na]
... 20 common frames omitted
Caused by: java.lang.NoSuchMethodError: com.google.common.collect.Sets$SetView.iterator()Lcom/google/common/collect/UnmodifiableIterator;
at org.reflections.Reflections.expandSuperTypes(Reflections.java:380) ~[reflections-0.9.11.jar:na]
at org.reflections.Reflections.<init>(Reflections.java:126) ~[reflections-0.9.11.jar:na]
at org.reflections.Reflections.<init>(Reflections.java:168) ~[reflections-0.9.11.jar:na]
at org.reflections.Reflections.<init>(Reflections.java:141) ~[reflections-0.9.11.jar:na]
at com.alibaba.nacos.api.remote.PayloadRegistry.scan(PayloadRegistry.java:56) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.api.remote.PayloadRegistry.init(PayloadRegistry.java:44) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.common.remote.client.RpcClient.<clinit>(RpcClient.java:114) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.common.remote.client.RpcClientFactory.lambda$createClient$0(RpcClientFactory.java:81) ~[nacos-client-2.0.4.jar:na]
at java.util.concurrent.ConcurrentHashMap.computeIfAbsent(ConcurrentHashMap.java:1660) ~[na:1.8.0_181]
at com.alibaba.nacos.common.remote.client.RpcClientFactory.createClient(RpcClientFactory.java:79) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.client.naming.remote.gprc.NamingGrpcClientProxy.<init>(NamingGrpcClientProxy.java:87) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.client.naming.remote.NamingClientProxyDelegate.<init>(NamingClientProxyDelegate.java:76) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.client.naming.NacosNamingService.init(NacosNamingService.java:95) ~[nacos-client-2.0.4.jar:na]
at com.alibaba.nacos.client.naming.NacosNamingService.<init>(NacosNamingService.java:81) ~[nacos-client-2.0.4.jar:na]
... 25 common frames omitted
2022-10-27 11:20:32.881 WARN 12908 --- [ Thread-15] c.a.n.common.http.HttpClientBeanHolder : [HttpClientBeanHolder] Start destroying common HttpClient
2022-10-27 11:20:32.881 WARN 12908 --- [ Thread-12] c.a.nacos.common.notify.NotifyCenter : [NotifyCenter] Start destroying Publisher
Process finished with exit code 1
解决方法,去掉 ribbon 里的 guava 依赖
...
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
<version>2.2.7.RELEASE</version>
<exclusions>
<exclusion>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
</exclusion>
</exclusions>
</dependency>
...
有一个问题, 这个依赖是干啥的呢?
<dependency>
<groupId>com.alibaba.nacos</groupId>
<artifactId>nacos-client</artifactId>
</dependency>
nacos 官网文档里没说要倒入这个依赖啊, 但是 example 里需要这个依赖, 有人知道吗?
一波未平,一波又起
刚解决了不能启动的问题, 现在又出现 instance 无法访问的 bug
consumer 工程里的 HelloController 无法通过 ip 地址和服务名访问服务提供者 (provider工程), 搞了一下午, 头痛欲裂, 看来 nacos 还是不太成熟啊, 个人觉得应该是 cloud 和 ailibaba cloud 版本太高导致, 有没有人想尝试解决这个bug呢
git@gitee.com:hashtables/study_project.git 版本是这个tag nacos-bug2
一会尝试一下用 feign 调用接口, 现实中大家都是 feign 调用接口的, 很少使用 resttemplate 按服务名调用
接着肝…
搞鬼啊, 兄弟们, feign 也调不通啊, 代码仓库 tag: feign也调不通, 提交注释是 feign也调不通
有没有大神想挑战一下, 深入了解下 ribbon feign 内部原理呢, 这个bug 搞了一天了
为啥我这个 nacos 始终搞不好
这个是详细报错
2022-10-27 17:14:28.289 ERROR 24200 --- [nio-8082-exec-1] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.AbstractMethodError: org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud/client/ServiceInstance;] with root cause
java.lang.AbstractMethodError: org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient.choose(Ljava/lang/String;Lorg/springframework/cloud/client/loadbalancer/Request;)Lorg/springframework/cloud/client/ServiceInstance;
at org.springframework.cloud.openfeign.loadbalancer.FeignBlockingLoadBalancerClient.execute(FeignBlockingLoadBalancerClient.java:97) ~[spring-cloud-openfeign-core-3.1.4.jar:3.1.4]
at feign.SynchronousMethodHandler.executeAndDecode(SynchronousMethodHandler.java:119) ~[feign-core-11.8.jar:na]
at feign.SynchronousMethodHandler.invoke(SynchronousMethodHandler.java:89) ~[feign-core-11.8.jar:na]
at feign.ReflectiveFeign$FeignInvocationHandler.invoke(ReflectiveFeign.java:100) ~[feign-core-11.8.jar:na]
at com.sun.proxy.$Proxy97.echo(Unknown Source) ~[na:na]
at com.study.ming.controller.HelloController.echo(HelloController.java:44) ~[classes/:na]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.22.jar:5.3.22]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.22.jar:5.3.22]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.22.jar:5.3.22]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.22.jar:5.3.22]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.22.jar:5.3.22]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.22.jar:5.3.22]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1070) ~[spring-webmvc-5.3.22.jar:5.3.22]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.22.jar:5.3.22]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.22.jar:5.3.22]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.22.jar:5.3.22]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.65.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.22.jar:5.3.22]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.65.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.65.jar:9.0.65]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.22.jar:5.3.22]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.22.jar:5.3.22]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.22.jar:5.3.22]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.22.jar:5.3.22]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:96) ~[spring-boot-actuator-2.7.3.jar:2.7.3]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.22.jar:5.3.22]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.22.jar:5.3.22]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.22.jar:5.3.22]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1789) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.65.jar:9.0.65]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.65.jar:9.0.65]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_181]
2022-10-27 17:14:28.773 INFO 24200 --- [ent-executor-44] com.alibaba.nacos.common.remote.client : [110166af-3fe6-4d8d-b8f6-facc6a2fe601] Receive server push request, request = NotifySubscriberRequest, requestId = 42
2022-10-27 17:14:28.773 INFO 24200 --- [ent-executor-44] com.alibaba.nacos.common.remote.client : [110166af-3fe6-4d8d-b8f6-facc6a2fe601] Ack server push request, request = NotifySubscriberRequest, requestId = 42
沃妮马, 老子试出来了, 我吧 loadbalancer, ribbon, openfeign 的版本从3.xx(从cloud dependency 继承过来的), 降到 2.2.9 RELEASE, 然后加了一个 比较关键的配置
spring.cloud.loadbalancer.ribbon.enabled=false
spring.cloud.loadbalancer.nacos.enabled=true
神奇般的好了, 代码版本 tag: 沃妮马, 老子试出来了
本着科学严谨的态度, 使用控制变量法, 上一把应该是两个动作然后好使了, 现在将 loadbalancer, ribbon, openfeign 的版本还原, 看是版本的问题还是那个配置的问题
于是报了这么一个错误
Param ‘serviceName‘ is illegal, serviceName is blank
然后又加了一步, 加了bootstrap的依赖, 神奇般的好了, 非常的舒适
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-bootstrap</artifactId>
</dependency>
对应代码tag: 沃妮马, 老子试出来了2
继续上一步的控制变量法, 注释 那两个配置
#spring.cloud.loadbalancer.ribbon.enabled=false
#spring.cloud.loadbalancer.nacos.enabled=true
然后又不好使了, 报错:
这两个配置的字面意思是
禁用 ribbon 的负载均衡, 启用 nacos 的负载均衡, ??? 难道nacos也有负载均衡??? 为什么注释之后会报错??? 是时候了解一下 ribbon nacos 还有注册中心的内部原理了
顺便说一下, 这个配置是从官方文档里找到的, 在章节3.5.1, 看了看文档, 抱着试一试的态度,发现加了配置后就好使了
