java/lang/management/ThreadMXBean/ThreadLists.java : inconsistent results

----------messages:(3/121)----------
command: main ThreadLists
reason: Assumed action based on file name: run main ThreadLists
elapsed time (seconds): 0.559
----------System.out:(4/127)----------
ThreadGroup: 5 active thread(s)
Thread: 5 stack trace(s) returned
ThreadMXBean: 6 live threads(s)
ThreadMXBean: 6 thread Id(s)
----------System.err:(13/721)----------
java.lang.RuntimeException: inconsistent results
at ThreadLists.main(ThreadLists.java:67)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:520)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:110)
at java.lang.Thread.run(Thread.java:804)