--- a/jdk/src/share/classes/sun/management/counter/perf/PerfDataEntry.java	Tue Aug 30 14:41:12 2011 +0100
+++ b/jdk/src/share/classes/sun/management/counter/perf/PerfDataEntry.java	Tue Aug 30 11:53:11 2011 -0700
@@ -133,7 +133,7 @@
         catch (UnsupportedEncodingException e) {
             // should not reach here
             // "UTF-8" is always a known encoding
-            throw new InternalError(e.getMessage());
+            throw new InternalError(e.getMessage(), e);
         }
 
         if (variability == Variability.INVALID) {