Index: sample/src/org/jboss/byteman/sample/helper/JMXHelper.java
===================================================================
--- sample/src/org/jboss/byteman/sample/helper/JMXHelper.java	(revision 539)
+++ sample/src/org/jboss/byteman/sample/helper/JMXHelper.java	(working copy)
@@ -465,7 +465,7 @@
     {
         ArrayList<MBeanServer> mbeanServers = MBeanServerFactory.findMBeanServer(null);
         MBeanServer mbeanServer;
-        if (mbeanServers != null) {
+        if (mbeanServers != null && !mbeanServers.isEmpty()) {
             mbeanServer = mbeanServers.get(0);
         } else {
             mbeanServer = ManagementFactory.getPlatformMBeanServer();