title: Spring boot stops right after "Started <app_name> in X seconds (JVM running for Y)
body: <p>I am using Eclipse 14.4.0 on Ubuntu 20.04.3. I've loaded &quot;Spring Tools 3&quot; and a Lombok plugin.</p>
  <p>Here's my pom.xml:</p>
  <pre><code>&lt;?xml version=&quot;1.0&quot; encoding=&quot;UTF-8&quot;?&gt;
  &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot;
      xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd&quot;&gt;
      &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
      &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;2.6.3&lt;/version&gt;
          &lt;relativePath/&gt; &lt;!-- lookup parent from repository --&gt;
      &lt;/parent&gt;
      &lt;groupId&gt;com.test&lt;/groupId&gt;
      &lt;artifactId&gt;test&lt;/artifactId&gt;
      &lt;version&gt;0.0.1-SNAPSHOT&lt;/version&gt;
      &lt;name&gt;test&lt;/name&gt;
      &lt;description&gt;Demo project for Spring Boot&lt;/description&gt;
      &lt;properties&gt;
          &lt;java.version&gt;13&lt;/java.version&gt;
      &lt;/properties&gt;
      &lt;dependencies&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
              &lt;artifactId&gt;spring-boot-starter-webflux&lt;/artifactId&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;dependency&gt;
              &lt;groupId&gt;io.projectreactor&lt;/groupId&gt;
              &lt;artifactId&gt;reactor-test&lt;/artifactId&gt;
              &lt;scope&gt;test&lt;/scope&gt;
          &lt;/dependency&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;org.projectlombok&lt;/groupId&gt;
              &lt;artifactId&gt;lombok&lt;/artifactId&gt;
          &lt;/dependency&gt;
      &lt;/dependencies&gt;
  
      &lt;build&gt;
          &lt;plugins&gt;
              &lt;plugin&gt;
                  &lt;groupId&gt;org.springframework.boot&lt;/groupId&gt;
                  &lt;artifactId&gt;spring-boot-maven-plugin&lt;/artifactId&gt;
              &lt;/plugin&gt;
          &lt;/plugins&gt;
      &lt;/build&gt;
  
  &lt;/project&gt;
  </code></pre>
  <p>The TestApplication class:</p>
  <pre><code>package com.test.test;
  
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  
  @SpringBootApplication
  public class TestApplication {
  
      public static void main(String[] args) {
          SpringApplication.run(TestApplication.class, args);
      }
  
  }
  </code></pre>
  <p>And the DemoController class:</p>
  <pre><code>package com.test.test.controller;
  
  //Importing required classes
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.ResponseBody;
   
  // Annotation
  @Controller
   
  // Class
  public class DemoController {
   
      @RequestMapping(&quot;/hello&quot;)
      @ResponseBody
   
      // Method
      public String helloWorld()
      {
   
          // Print statement
          return &quot;Hello World!&quot;;
      }
  }
  </code></pre>
  <p>To run the program, I right-click on it and select Run As --&gt; Java Application. From the &quot;Select Java Application&quot; popup that's generated, I select &quot;TestApplication - com.test.test&quot;.</p>
  <p>Spring Boot loads and runs until it gets to the final line of code below, after which nothing happens.</p>
  <pre><code>  .   ____          _            __ _ _
   /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
  ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
   \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
    '  |____| .__|_| |_|_| |_\__, | / / / /
   =========|_|==============|___/=/_/_/_/
   :: Spring Boot ::                (v2.6.3)
  
  2022-02-12 16:21:21.779  INFO 166442 --- [           main] com.test.test.TestApplication            : Starting TestApplication using Java 13.0.2 on ubuntu with PID 166442 (/home/oleh/Downloads/test/target/classes started by oleh in /home/oleh/Downloads/test)
  2022-02-12 16:21:21.849  INFO 166442 --- [           main] com.test.test.TestApplication            : No active profile set, falling back to default profiles: default
  2022-02-12 16:21:58.814  INFO 166442 --- [           main] o.s.b.web.embedded.netty.NettyWebServer  : Netty started on port 8080
  2022-02-12 16:21:59.033  INFO 166442 --- [           main] com.test.test.TestApplication            : Started TestApplication in 43.693 seconds (JVM running for 51.954)
  </code></pre>
  <p>If I open a web browser and search the localhost:8080 URL, I'm given an error that says &quot;Whitelable Error Page&quot;.</p>
  <p>I've tried updating Maven dependencies and cleaning the project. I've also tried many variations of this project, all of which ended the same way. I'm not sure what to verify and debug because the console does not print any errors.</p>
  <p>Can anyone help explain what is missing for the browser window to open and &quot;Hello World!&quot; to be displayed on it?</p>
  <p>Many thanks.</p>