--- a/jdk/src/share/classes/sun/management/counter/perf/PerfDataType.java	Tue Aug 30 14:41:12 2011 +0100
+++ b/jdk/src/share/classes/sun/management/counter/perf/PerfDataType.java	Tue Aug 30 11:53:11 2011 -0700
@@ -93,7 +93,7 @@
             this.value = b[0];
         } catch (UnsupportedEncodingException e) {
             // ignore, "UTF-8" is always a known encoding
-            throw new InternalError("Unknown encoding");
+            throw new InternalError("Unknown encoding", e);
         }
     }
 }