--- old/agent/src/share/classes/sun/jvm/hotspot/utilities/Hashtable.java	2015-10-30 19:14:40.972475306 +0100
+++ new/agent/src/share/classes/sun/jvm/hotspot/utilities/Hashtable.java	2015-10-30 19:14:40.908475304 +0100
@@ -61,9 +61,8 @@
     long h = 0;
     int s = 0;
     int len = buf.length;
-    // Emulate the unsigned int in java_lang_String::hash_code
     while (len-- > 0) {
-      h = 31*h + (0xFFFFFFFFL & buf[s]);
+      h = 31*h + (0xFFL & buf[s]);
       s++;
     }
     return h & 0xFFFFFFFFL;