title: ClassNotFoundException even if the jar is in WEB-INF/lib
body: <p>I'm facing strange problem. I'm getting </p>
  
  <pre><code>java.lang.ClassNotFoundException: org.apache.commons.codec.DecoderException
  </code></pre>
  
  <p>but commons-codec.jar is in the WEB-INF/lib folder. What's going on?</p>