Index: common/common-util/src/main/java/com/sun/enterprise/loader/ASURLClassLoader.java
===================================================================
--- common/common-util/src/main/java/com/sun/enterprise/loader/ASURLClassLoader.java	(revision 35185)
+++ common/common-util/src/main/java/com/sun/enterprise/loader/ASURLClassLoader.java	(working copy)
@@ -80,6 +80,7 @@
 
 import org.glassfish.api.deployment.InstrumentableClassLoader;
 import org.jvnet.hk2.component.PreDestroy;
+import sun.net.www.ParseUtil;
 
 /**
  * Class loader used by the ejbs of an application or stand alone module.
@@ -1347,15 +1348,26 @@
 
         /**
          * @see java.net.URLStreamHandler#openConnection(java.net.URL)
-         * Should this method allow opening more than one connection?
          */
         protected URLConnection openConnection(final URL u) throws IOException {
-            if (u != mURL) { // ref compare on purpose
-                // This should never happen
-                throw new IOException("Cannot open a foreign URL; this.url=" + mURL
-                    + "; foreign.url=" + u);
+            String path = u.getPath();
+            int separator = path.lastIndexOf('!');
+            assert(separator != -1); // we deal with jar urls only
+            try {
+                URI jarFileURI = new URI(path.substring(0, separator));
+                if (!jarFileURI.equals(mRes.file.toURI())) {
+                    throw new IOException("Cannot open a foreign URL; this.url=" + mURL
+                        + "; foreign.url=" + u);
+                }
+                String entryName = path.substring(separator+1);
+                if (entryName != null) {
+                    assert (entryName.startsWith("/"));
+                    entryName = entryName.substring(1);
+                }
+                return new InternalJarURLConnection(u, mRes, entryName);
+            } catch (URISyntaxException e) {
+                throw new IOException(e);
             }
-            return new InternalJarURLConnection(u, mRes, mName);
         }
 
         /**