老师，我看完zipkin相关的视频之后，自己搭了个demo来用下Zipkin，但是Zipkin没有显示调用，下面是我的demo的大概的代码。

在父工程的pom.xml引入Zipkin相关的依赖如下：

 <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>io.zipkin.brave</groupId>
                <artifactId>brave-bom</artifactId>
                <version>5.5.0</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>

            <dependency>
                <groupId>io.zipkin.reporter2</groupId>
                <artifactId>zipkin-reporter-bom</artifactId>
                <version>2.7.9</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

分别在服务提供者、服务消费者引入Zipkin相关的依赖如下：

  <!--zipkin start-->
        <dependency>
            <groupId>io.zipkin.brave</groupId>
            <artifactId>brave-instrumentation-dubbo-rpc</artifactId>
        </dependency>

        <dependency>
            <groupId>io.zipkin.brave</groupId>
            <artifactId>brave-spring-beans</artifactId>
        </dependency>

        <dependency>
            <groupId>io.zipkin.brave</groupId>
            <artifactId>brave-context-slf4j</artifactId>
        </dependency>

        <dependency>
            <groupId>io.zipkin.reporter2</groupId>
            <artifactId>zipkin-sender-okhttp3</artifactId>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>4.0.1</version>
        </dependency>
        <!--zipkin end-->

配置类

HelloServiceImpl.java

@Component
@Service(interfaceClass = HelloService.class, filter = "tracing")
public class HelloServiceImpl implements HelloService {
    @Override
    public String sayHello(String name) {
        try {
            // 通过 sleep 模拟业务逻辑处理时间
            Thread.sleep(new Random(System.currentTimeMillis()).nextInt(1000));
        } catch (InterruptedException e) {
            // no op
        }
        return "hello, " + name;
    }
}

GreetServiceImpl.java，在GreetServiceImpl中调用helloService.sayHello(name)。

@Component
@Service(interfaceClass = GreetService.class, filter = "tracing")
public class GreetServiceImpl implements GreetService {
    @Reference(interfaceClass = HelloService.class, check = false)
    private HelloService helloService;

    @Override
    public String greeting(String name) {
        try {
            // 通过 sleep 模拟业务逻辑处理时间
            Thread.sleep(new Random(System.currentTimeMillis()).nextInt(1000));
        } catch (InterruptedException e) {
            // no op
        }
        return "greeting, " + helloService.sayHello(name);
    }
}

GreetController.java

@RestController
public class GreetController {

    @Reference(interfaceClass = GreetService.class,filter="tracing")
    private GreetService greetService;

    @RequestMapping("/greet")
    public String greet() {
        String greeting = greetService.greeting("moss");
        return greeting;
    }
}

启动工程之后，能成功访问页面

但是在Zipkin没有显示刚刚的调用

不知道问题出在哪里，请老师帮忙看下。