--- old/src/share/vm/prims/jvm.cpp	Fri Jan 31 10:04:21 2014
+++ new/src/share/vm/prims/jvm.cpp	Fri Jan 31 10:04:21 2014
@@ -518,6 +518,12 @@
   JavaThreadInObjectWaitState jtiows(thread, ms != 0);
   if (JvmtiExport::should_post_monitor_wait()) {
     JvmtiExport::post_monitor_wait((JavaThread *)THREAD, (oop)obj(), ms);
+
+    // The current thread already owns the monitor and it has not yet
+    // been added to the wait queue so the current thread cannot be
+    // made the successor. This means that the JVMTI_EVENT_MONITOR_WAIT
+    // event handler cannot accidentally consume an unpark() meant for
+    // the ParkEvent associated with this ObjectMonitor.
   }
   ObjectSynchronizer::wait(obj, ms, CHECK);
 JVM_END