title: Project build error: 'dependencies.dependency.version' for io.zipkin.java:zipkin-autoconfigure-ui:jar is missing
body: <p>I am developing Microservices specifically <code>"zipkin-service"</code>. I have taken a reference from  link: <a href="https://www.baeldung.com/tracing-services-with-zipkin" rel="nofollow noreferrer">https://www.baeldung.com/tracing-services-with-zipkin</a>.</p>
  
  <p>Could anyone please guide what's the issue ?</p>
  
  <p>When I added below dependencies, then I get the </p>
  
  <pre><code>&lt;dependency&gt;
      &lt;groupId&gt;io.zipkin.java&lt;/groupId&gt;
      &lt;artifactId&gt;zipkin-server&lt;/artifactId&gt;
  &lt;/dependency&gt;
  &lt;dependency&gt;
      &lt;groupId&gt;io.zipkin.java&lt;/groupId&gt;
      &lt;artifactId&gt;zipkin-autoconfigure-ui&lt;/artifactId&gt;
      &lt;scope&gt;runtime&lt;/scope&gt;
  &lt;/dependency&gt;
  </code></pre>
  
  <p>Error:</p>
  
  <blockquote>
    <p>Project build error: 'dependencies.dependency.version' for io.zipkin.java:zipkin-autoconfigure-ui:jar is missing.</p>
  </blockquote>
  
  <p><strong>pom.xml</strong></p>
  
  <pre><code>&lt;parent&gt;
          &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
          &lt;artifactId&gt;spring-boot-starter-parent&lt;/artifactId&gt;
          &lt;version&gt;2.0.4.RELEASE&lt;/version&gt;
          &lt;relativePath /&gt; &lt;!-- lookup parent from repository --&gt;
      &lt;/parent&gt;
  
      &lt;properties&gt;
          &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt;
          &lt;project.reporting.outputEncoding&gt;UTF-8&lt;/project.reporting.outputEncoding&gt;
          &lt;java.version&gt;1.8&lt;/java.version&gt;
          &lt;spring-cloud.version&gt;Finchley.SR1&lt;/spring-cloud.version&gt;
      &lt;/properties&gt;
  
      &lt;dependencies&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
              &lt;artifactId&gt;spring-cloud-starter-config&lt;/artifactId&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
              &lt;artifactId&gt;spring-cloud-starter-netflix-eureka-server&lt;/artifactId&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;io.zipkin.java&lt;/groupId&gt;
              &lt;artifactId&gt;zipkin-server&lt;/artifactId&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;io.zipkin.java&lt;/groupId&gt;
              &lt;artifactId&gt;zipkin-autoconfigure-ui&lt;/artifactId&gt;
              &lt;scope&gt;runtime&lt;/scope&gt;
          &lt;/dependency&gt;
  
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
              &lt;artifactId&gt;spring-boot-starter-test&lt;/artifactId&gt;
              &lt;scope&gt;test&lt;/scope&gt;
          &lt;/dependency&gt;
      &lt;/dependencies&gt;
  
      &lt;dependencyManagement&gt;
          &lt;dependencies&gt;
              &lt;dependency&gt;
                  &lt;groupId&gt;org.springframework.cloud&lt;/groupId&gt;
                  &lt;artifactId&gt;spring-cloud-dependencies&lt;/artifactId&gt;
                  &lt;version&gt;${spring-cloud.version}&lt;/version&gt;
                  &lt;type&gt;pom&lt;/type&gt;
                  &lt;scope&gt;import&lt;/scope&gt;
              &lt;/dependency&gt;
          &lt;/dependencies&gt;
      &lt;/dependencyManagement&gt;
  </code></pre>
  
  <p><strong>ZipkinServiceApplication.java</strong></p>
  
  <pre><code>@EnableZipkinServer
  @EnableDiscoveryClient
  @SpringBootApplication
  public class ZipkinServiceApplication {
  
      public static void main(String[] args) {
          SpringApplication.run(ZipkinServiceApplication.class, args);
      }
  }
  </code></pre>