--- old/src/share/classes/com/sun/jndi/dns/DnsContext.java	2012-01-29 19:33:29.000000000 -0800
+++ new/src/share/classes/com/sun/jndi/dns/DnsContext.java	2012-01-29 19:33:29.000000000 -0800
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -191,7 +191,7 @@
             return environment.put(propName, propVal);
         } else if (environment.get(propName) != propVal) {
             // copy on write
-            environment = (Hashtable<Object,Object>) environment.clone();
+            environment = environment.clone();
             envShared = false;
             return environment.put(propName, propVal);
         } else {
@@ -225,7 +225,7 @@
             return environment.remove(propName);
         } else if (environment.get(propName) != null) {
             // copy-on-write
-            environment = (Hashtable<Object,Object>) environment.clone();
+            environment = environment.clone();
             envShared = false;
             return environment.remove(propName);
         } else {