title: How could I possibly debug "Couldn't find design note - undefined"?
body: <p>In an Xpages driven application I quite frequently see messages like this appearing at the server console:</p>
  
  <pre><code>HTTP Web Server: Couldn't find design note - undefined [/myDbPath/myDb.nsf/undefined] Some Username
  </code></pre>
  
  <p>Quite often but not always this message is preceded by another weird warning</p>
  
  <pre><code>HTTP JVM: WARNING: CLFAD####W: State data not available for /myPage because no control tree was found in the cache.
  </code></pre>
  
  <p>(for the latter you may want to see my other <a href="https://stackoverflow.com/questions/32482575/xpages-falling-out-of-server-side-cache">still viral issue regarding cache losing my pages</a>)</p>
  
  <p>So far no users have complained, but the latest release of the application has been published only a couple of days ago, so this makes me kind of nervous.</p>
  
  <p>Question is: how could I possibly debug such a thing? Of course I couldn't find anything by the name of "undefined"...</p>