Client error: invalid param endpoint is blank

Question presentation ：

scene ：

In the current project , Want to pass nacos As configuration center , Get nacos Configuration stored in , So I added the following dependencies

<dependencies>
		<！-- Here is groupId = com.alibaba.cloud  Of nacos rely on -->
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>
        <！-- Here is groupId = com.alibaba.boot  Of nacos rely on -->
        <dependency>
            <groupId>com.alibaba.boot</groupId>
            <artifactId>nacos-config-spring-boot-starter</artifactId>
            <version>0.2.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
        </dependency>
    </dependencies>
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-alibaba-dependencies</artifactId>
                <version>2.2.7.RELEASE</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

First , I don't care why alibaba Developers need to put nacos Divide into groupId = com.alibaba.cloud and groupId = com.alibaba.boot Two kinds of dependence .
Although I used it first groupId = com.alibaba.cloud Dependence , And already application.yml Configuration of the nacos Service address of .

server:
  servlet:
    context-path: /mdc-mvc-demo
  port: 8081
spring:
  application:
    name: mdc-mvc-demo
  cloud:
    nacos:
      config:
        enable: true #  Use whether to configure automatic update 
        server-addr: 127.0.0.1:8848
        group: DEFAULT_GROUP #  Group , The default is  DEFAULT_GROUP
        file-extension: yaml #  Configure the data format of the content , The default is  properties

But I refer to the example of online tutorial , The use of @NacosPropertySource Annotations need to be used groupId = com.alibaba.boot Dependence .
It's changed pom.xml after , I started happily , As a result, the startup failed , Threw the error shown above .

The analysis reason ：

First , What is certain is that , Is due to @NacosPropertySource The problems caused .
At first, there was really no clue , So I began to find the reason from the log printed above , I noticed a log ：

22:12:29.077 [main] WARN NacosPropertySourceBuilder -Ignore the empty nacos configuration and get it based on dataId[mdc-mvc-demo] & group[DEFAULT_GROUP]

Why do you remind me nacos The configuration of is empty ？ And mine dataId Is set to mdc-mvc-demo.yaml, It locks the print dataId[mdc-mvc-demo] Based on spring.application.name Set the default value of .

@Data
@Component
@NacosPropertySource(dataId = "mdc-mvc-demo.yaml", autoRefreshed = true)
public class NacosAnotherProperties {
    
    @NacosValue(value = "${project.name}", autoRefreshed = true)
    private String name;
    @NacosValue(value = "${project.org}", autoRefreshed = true)
    private String org;
}

therefore , I guess , Is due to groupId = com.alibaba.cloud and groupId = com.alibaba.boot The two dependencies do not use the same set of configurations ,groupId = com.alibaba.boot This set of dependent configurations is com.alibaba.boot.nacos.config.properties.NacosConfigProperties

therefore , I tried to add configuration ：

server:
  servlet:
    context-path: /mdc-mvc-demo
  port: 8081
spring:
  application:
    name: mdc-mvc-demo
      # cloud:
      # nacos:
      # config:
      # enable: true #  Use whether to configure automatic update 
      # server-addr: 127.0.0.1:8848
      # group: DEFAULT_GROUP #  Group , The default is  DEFAULT_GROUP
      # file-extension: yaml #  Configure the data format of the content , The default is  properties
    # prefix:  Not configured. The default is spring.application.name
nacos:
  config:
    server-addr: 127.0.0.1:8848

Then try ,@NacosPropertySource Can't parse yaml Type of configuration , This is changed into properties

@Data
@Component
@NacosPropertySource(dataId = "mdc-mvc-demo", autoRefreshed = true)
public class NacosAnotherProperties {
    
    @NacosValue(value = "${project.name}", autoRefreshed = true)
    private String name;
    @NacosValue(value = "${project.org}", autoRefreshed = true)
    private String org;
}

After restart , There is no further prompt endpoint is blank 's report is wrong , And you can also read nacos Configuration of

solve the problem

therefore , The solution to the problem is ：
If you use groupId = com.alibaba.boot This dependent function , You should use nacos.config To configure nacos