--- old/src/share/classes/java/lang/Thread.java	Mon Dec  6 11:23:32 2010
+++ new/src/share/classes/java/lang/Thread.java	Mon Dec  6 11:23:32 2010
@@ -209,7 +209,7 @@
      * initialized to indicate thread 'not yet started'
      */
 
-    private int threadStatus = 0;
+    private volatile int threadStatus = 0;
 
 
     private static synchronized long nextThreadID() {