Improve logging

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1334806 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/src/main/java/org/apache/sling/jcr/classloader/internal/RepositoryClassLoader.java b/src/main/java/org/apache/sling/jcr/classloader/internal/RepositoryClassLoader.java
index 347875e..b668ea0 100644
--- a/src/main/java/org/apache/sling/jcr/classloader/internal/RepositoryClassLoader.java
+++ b/src/main/java/org/apache/sling/jcr/classloader/internal/RepositoryClassLoader.java
@@ -182,7 +182,7 @@
      */
     public URL findResource(final String name) {
         if (destroyed) {
-            logger.warn("Destroyed class loader cannot find a resource: {}", name);
+            logger.warn("Destroyed class loader cannot find a resource: " + name, new IllegalStateException());
             return null;
         }
 
@@ -213,7 +213,7 @@
      */
     public Enumeration<URL> findResources(final String name) {
         if (destroyed) {
-            logger.warn("Destroyed class loader cannot find resources: {}", name);
+            logger.warn("Destroyed class loader cannot find a resources: " + name, new IllegalStateException());
             return new Enumeration<URL>() {
                 public boolean hasMoreElements() {
                     return false;