title: java.lang.ClassCastException: org.eclipse.jetty.webapp.WebAppContext cannot be cast to org.eclipse.jetty.maven.plugin.JettyWebAppContext
body: <p>ON jetty 8 to jetty 9 migration when using jetty-maven-plugin, the application cannot load because of the class cast exception:</p>
  
  <blockquote>
    <p>java.lang.ClassCastException: org.eclipse.jetty.webapp.WebAppContext
    cannot be cast to org.eclipse.jetty.maven.plugin.JettyWebAppContext</p>
  </blockquote>