title: tomcat - their classes from previous runs are still loaded in memory
body: <p>when stop my project , tomcat say :</p>
  
  <p>The following web applications were stopped (reloaded, undeployed), but their classes from    previous runs are still
  loaded in memory, thus causing a memory leak (use a profiler to confirm) .</p>
  
  <p>Where we find that Which classes are left in memory ?</p>
  
  <p>please help me . </p>