GC count not matching JVMTI events

There is a discrepancy between the number of GC occurrences reported from JVMTI and java.lang.management.GarbageCollectorMXBean.

This problem is reported in the HotSpot internal and the JMX forum
  http://forum.java.sun.com/thread.jspa?threadID=5299636
  http://forum.java.sun.com/thread.jspa?threadID=5299635

It seems that there is a bug in the M&M instrumentation that may miss a few GC counts.