#310603: readded unwrapping of caused by exceptions

git-svn-id: svn+ssh://dev.eclipse.org/svnroot/rt/org.eclipse.jetty/jetty/trunk@1931 7e9141cc-0065-0410-87d8-b60c137991c4

jetty-util/src/main/java/org/eclipse/jetty/util/log/StdErrLog.java

@@ -303,6 +303,13 @@ public class StdErrLog implements Logger
                 buffer.append("\n\tat ");
                 format(buffer, elements[i].toString());
             }
+            
+            Throwable cause = thrown.getCause();
+            if (cause!=null && cause!=thrown)
+            {
+                buffer.append("\nCaused by: ");
+                format(buffer,cause);
+            }
         }
     }
 

jetty-util/src/main/java/org/eclipse/jetty/util/resource/ResourceCollection.java

@@ -114,6 +114,10 @@ public class ResourceCollection extends Resource
                     throw new IllegalArgumentException(_resources[i] + " is not an existing directory.");
             }
         }
+        catch(IllegalArgumentException e)
+        {
+            throw e;
+        }
         catch(Exception e)
         {
             throw new RuntimeException(e);