ClassNotFoundException: org.springframework.cloud.client.discovery.simpleSimpleDiscoveryClientAutoConfiguration
The problem encountered when listening to the dark horse’s springcloud class P16. First, follow the guidance of the barrage to add the @EnableDiscoveryClient annotation on the startup class and introduce the corresponding class, but it still fails to run Then I checked some related issues on the Internet and found that most of them were caused by version conflicts, so after checking the maven Respository, put the dependency in spring-cloud- The version of starter-alibaba-nacos-discovery has been changed to 2021.1, and it can now run normally, and the registration in nacos is successful. However, it is still unclear which dependency versions are in conflict. .
Later, in the process of practice, I encountered the problem that the service room could not be accessed through the service name. I found this article on the Internet and solved it: After the nacos registration center service is registered, the service name cannot be used. Use ip + port The number can be accessed_nacos can not find the service_Shui Mu Fan Tsinghua’s Blog-CSDN Blog
Parent project depends on:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>cn.itcast.demo</groupId> <artifactId>cloud-demo</artifactId> <version>1.0</version> <modules> <module>user-service</module> <module>order-service</module> <module>eureka-server</module> </modules> <packaging>pom</packaging> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.3.9.RELEASE</version> <relativePath/> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <java.version>1.8</java.version> <spring-cloud.version>Hoxton.SR10</spring-cloud.version> <mysql.version>5.1.47</mysql.version> <mybatis.version>2.1.1</mybatis.version> </properties> <dependencyManagement> <dependencies> <!-- springCloud --> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-dependencies</artifactId> <version>${spring-cloud.version}</version> <type>pom</type> <scope>import</scope> </dependency> <!-- nacos management dependencies --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-alibaba-dependencies</artifactId> <version>2.2.5.RELEASE</version> <type>pom</type> <scope>import</scope> </dependency> <!-- mysql driver --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>${mysql.version}</version> </dependency> <!--mybatis--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> <version>${mybatis.version}</version> </dependency> </dependencies> </dependencyManagement> <dependencies> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.20</version> </dependency> </dependencies> </project>
Subservice depends on:
<?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <parent> <artifactId>cloud-demo</artifactId> <groupId>cn.itcast.demo</groupId> <version>1.0</version> </parent> <modelVersion>4.0.0</modelVersion> <artifactId>order-service</artifactId> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <!--mybatis--> <dependency> <groupId>org.mybatis.spring.boot</groupId> <artifactId>mybatis-spring-boot-starter</artifactId> </dependency> <!--eureka client configuration--> <!-- <dependency>--> <!-- <groupId>org.springframework.cloud</groupId>--> <!-- <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>--> <!-- </dependency>--> <!--nacos client configuration--> <!-- https://mvnrepository.com/artifact/com.alibaba.cloud/spring-cloud-starter-alibaba-nacos-discovery --> <dependency> <groupId>com.alibaba.cloud</groupId> <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId> <version>2021.1</version> </dependency> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-commons</artifactId> </dependency> <!--This dependency is required to implement LoadBalancer--> <dependency> <groupId>org.springframework.cloud</groupId> <artifactId>spring-cloud-starter-loadbalancer</artifactId> <!-- <version>version number</version>--> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
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