title: SpringBoot CommandLineRunner run() method not being called
body: <p>I'm learning SpringBoot. My (trivial) problem is I can't get the run() method from the CommandLineRunner Interface to be called by SpringBoot.
  I'm using Java 8 , Eclipse Oxygen ,Maven and i'm running my project as a "Spring Boot App".
  Code is:</p>
  
  <pre><code>package com.clarivate.dataviewer;
  
  import org.apache.logging.log4j.Logger;
  import org.apache.logging.log4j.LogManager;
  import org.springframework.boot.CommandLineRunner;
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.autoconfigure.SpringBootApplication;
  
  @SpringBootApplication
  public class DvMain implements CommandLineRunner{
  
  static Logger logger = LogManager.getRootLogger();
  
  public static void main(String[] args) {
      logger.debug("DS1A in main()");
      //SpringApplication.run(DvMain.class, args);
      SpringApplication app = new SpringApplication(DvMain.class);
      //ConfigurableApplicationContext app = SpringApplication.run(DvMain.class, args);
      logger.debug("DS1B in main()");
      app.run(args);
  }
  
  @Override
  public void run(String... args) throws Exception {
      // This does not get called
      logger.debug("DS4 this line is never printed");
  }
  }
  </code></pre>
  
  <p>The overridden run() method does not get called.
  I've tried creating a separate class that implements CommandLineRunner but same problem. The console trace is:</p>
  
  <pre><code>SLF4J: Class path contains multiple SLF4J bindings.
  SLF4J: Found binding in [jar:file:/C:/Users/44/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  SLF4J: Found binding in [jar:file:/C:/Users/44/.m2/repository/org/apache/logging/log4j/log4j-slf4j-impl/2.10.0/log4j-slf4j-impl-2.10.0.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
  SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]
  12:58:42.225 [main] DEBUG  - DS1A in main()
  12:58:42.289 [main] DEBUG  - DS1B in main()
  
    .   ____          _            __ _ _
   /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
  ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
   \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
    '  |____| .__|_| |_|_| |_\__, | / / / /
   =========|_|==============|___/=/_/_/_/
   :: Spring Boot ::        (v2.0.2.RELEASE)
  
  2018-06-20 12:58:42.614  INFO 16924 --- [           main] com.clarivate.dataviewer.DvMain          : Starting DvMain on 44-TPD-A with PID 16924 (C:\workspace_oxyegen\dataviewer\target\classes started by 44 in C:\workspace_oxyegen\dataviewer)
  2018-06-20 12:58:42.615  INFO 16924 --- [           main] com.clarivate.dataviewer.DvMain          : No active profile set, falling back to default profiles: default
  2018-06-20 12:58:42.655  INFO 16924 --- [           main] s.c.a.AnnotationConfigApplicationContext : Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext@6b4a4e18: startup date [Wed Jun 20 12:58:42 BST 2018]; root of context hierarchy
  2018-06-20 12:58:43.266  INFO 16924 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
  2018-06-20 12:58:43.279  INFO 16924 --- [           main] com.clarivate.dataviewer.DvMain          : Started DvMain in 0.988 seconds (JVM running for 1.684)
  2018-06-20 12:58:43.294  INFO 16924 --- [       Thread-2] s.c.a.AnnotationConfigApplicationContext : Closing org.springframework.context.annotation.AnnotationConfigApplicationContext@6b4a4e18: startup date [Wed Jun 20 12:58:42 BST 2018]; root of context hierarchy
  2018-06-20 12:58:43.296  INFO 16924 --- [       Thread-2] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown
  </code></pre>
  
  <p>I'm sure i've made a simple mistake but I just can't see it. Any help appreciated.</p>