From f8c1f70b7501e0055912bccb89ac8b3d5237557b Mon Sep 17 00:00:00 2001
From: Jan Bartel <janb@intalio.com>
Date: Tue, 6 May 2014 10:00:40 +0200
Subject: [PATCH] 433708 Improve WebAppClassLoader.addClassPath()
 IllegalStateException message

---
 .../java/org/eclipse/jetty/webapp/WebAppClassLoader.java    | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java
index ad05984fb86..6e9186ebd06 100644
--- a/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java
+++ b/jetty-webapp/src/main/java/org/eclipse/jetty/webapp/WebAppClassLoader.java
@@ -242,7 +242,11 @@ public class WebAppClassLoader extends URLClassLoader
                 else if (resource.isDirectory())
                     addURL(resource.getURL());
                 else
-                    throw new IllegalArgumentException("!file: "+resource);
+                {
+                    if (LOG.isDebugEnabled())
+                        LOG.debug("Check file exists and is not nested jar: "+resource);
+                    throw new IllegalArgumentException("File not resolvable or incompatible with URLClassloader: "+resource);
+                }
             }
         }
     }