--- org/apache/catalina/loader/WebappClassLoader.java	(revision 831783)
+++ org/apache/catalina/loader/WebappClassLoader.java	(working copy)
@@ -890,6 +890,8 @@ 
                     throw cnfe;
                 }
             } catch(AccessControlException ace) {
+                log.warn("WebappClassLoader.findClassInternal(" + name
+                        + ") security exception: " + ace.getMessage(), ace);
                 throw new ClassNotFoundException(name, ace);
             } catch (RuntimeException e) {
                 if (log.isTraceEnabled())
@@ -902,6 +904,8 @@ 
                         clazz = super.findClass(name);
                     }
                 } catch(AccessControlException ace) {
+                    log.warn("WebappClassLoader.findClass(" + name
+                            + ") security exception: " + ace.getMessage(), ace);
                     throw new ClassNotFoundException(name, ace);
                 } catch (RuntimeException e) {
                     if (log.isTraceEnabled())