为什么netflix-ribbon依赖项不能与netflix-eureka依赖项一起使用

Question

我正在本地计算机上构建微服务。一个客户端应用程序基于netflix-ribbon和netflix-eureka。我在日志中收到以下错误。

com.netflix.client.ClientException：负载均衡器没有适用于客户端的服务器：currency-exchange-service     在com.netflix.loadbalancer.LoadBalancerContext.getServerFromLoadBalancer（LoadBalancerContext.java:483）〜[ribbon-loadbalancer-2.3.0.jar：2.3.0]     在com.netflix.loadbalancer.reactive.LoadBalancerCommand $ 1.call（LoadBalancerCommand.java:184）〜[ribbon-loadbalancer-2.3.0.jar：2.3.0]     在com.netflix.loadbalancer.reactive.LoadBalancerCommand $ 1.call（LoadBalancerCommand.java:180）〜[ribbon-loadbalancer-2.3.0.jar：2.3.0]     在rx.Observable.unsafeSubscribe（Observable.java:10327）〜[rxjava-1.3.8.jar：1.3.8]

要解决此问题，我必须删除以下依赖项，然后该服务才能正常运行。

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.4.RELEASE</version>
    <relativePath /> <!-- lookup parent from repository -->
</parent>
<groupId>com.sudip.mircoservices</groupId>
<artifactId>currency-calculation-service</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>currency-calculation-service</name>
<description>Demo project for Spring Boot</description>

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>Greenwich.SR1</spring-cloud.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-config</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-openfeign</artifactId>
        <version>2.0.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
        <version>2.0.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
        <version>2.0.0.RELEASE</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-devtools</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

我想将此（考虑服务A）注册为Eureka中的服务，并在服务A中进行负载平衡，该服务将在运行的3个实例中调用一个实例（服务B）。