title: Maven wants to access central.maven.org
body: <p>Since a few days, my maven build on gitlab (maven:3.6.3-jdk-11) tries to access central.maven.org and fails with</p>
  
  <pre><code>Caused by: org.eclipse.aether.transfer.ArtifactTransferException: Could not transfer artifact javax.media:jai_core:jar:1.1.3 from/to central.maven.org (http://central.maven.org/maven2): Transfer failed for http://central.maven.org/maven2/javax/media/jai_core/1.1.3/jai_core-1.1.3.jar
  ...
  Caused by: java.net.UnknownHostException: central.maven.org: Name or service not known
  </code></pre>
  
  <p>I haven't changed the settings.xml. It looks like this:</p>
  
  <pre><code>...
  &lt;repositories&gt;
      &lt;repository&gt;
            &lt;id&gt;central&lt;/id&gt;
            &lt;name&gt;Central Repository&lt;/name&gt;
            &lt;url&gt;https://repo1.maven.org/maven2/&lt;/url&gt;
            &lt;layout&gt;default&lt;/layout&gt;
            &lt;snapshots&gt;
              &lt;enabled&gt;false&lt;/enabled&gt;
            &lt;/snapshots&gt;
            &lt;releases&gt;
              &lt;enabled&gt;false&lt;/enabled&gt;
              &lt;updatePolicy&gt;never&lt;/updatePolicy&gt;
            &lt;/releases&gt;
          &lt;/repository&gt;
      &lt;/repositories&gt;
  
  &lt;pluginRepositories&gt;
      &lt;pluginRepository&gt;
        &lt;id&gt;central&lt;/id&gt;
        &lt;name&gt;Central Repository&lt;/name&gt;
        &lt;url&gt;https://repo1.maven.org/maven2/&lt;/url&gt;
        &lt;layout&gt;default&lt;/layout&gt;
        &lt;snapshots&gt;
          &lt;enabled&gt;false&lt;/enabled&gt;
        &lt;/snapshots&gt;
        &lt;releases&gt;
          &lt;updatePolicy&gt;never&lt;/updatePolicy&gt;
        &lt;/releases&gt;
      &lt;/pluginRepository&gt;
  &lt;/pluginRepositories&gt;
  
  ...
  </code></pre>
  
  <p>That is, I haven't configured a lookup for central.maven.org.
  Even the maven super pom does not contain this url, according to 
  <a href="https://maven.apache.org/ref/3.6.3/maven-model-builder/super-pom.html" rel="nofollow noreferrer">https://maven.apache.org/ref/3.6.3/maven-model-builder/super-pom.html</a></p>
  
  <p>Where does this come from and how can I fix this?</p>