title: log4j:ERROR with Tomcat 6
body: <p>I programmed a Web Application with Java EE. I am using log4j and Tomcat 6.0.28. When I am starting my app at tomcat following error message appears every 3 seconds at my console:</p>
  
  <pre><code>log4j:ERROR LogMananger.repositorySelector was null likely due to error in class reloading, using NOPLoggerRepository.
  </code></pre>
  
  <p>Has somebody an idea what that means? Is there maybe a problem with log4j.xml? I can post more code/configfiles if nessecary. </p>
  
  <p>The application works, but I am a little bit worried.
  Thank you...</p>