FULL PRODUCT VERSION :
java version "1.6.0-rc"
Java(TM) SE Runtime Environment (build 1.6.0-rc-b95)
Java HotSpot(TM) Server VM (build 1.6.0-rc-b95, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Linux xxxxxx 2.6.16 #2 SMP Mon Mar 27 17:30:45 CEST 2006 x86_64 GNU/Linux

A DESCRIPTION OF THE PROBLEM :
Math.random() and Math.initRNG() uses DCL (double checked locking) on " private static Random randomNumberGenerator".

Breaks in a multi processor environment, resulting in a NPE.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
Init field "private static Random randomNumberGenerator" in static initializer

ERROR MESSAGES/STACK TRACES THAT OCCUR :
Spurius NullPointerException

REPRODUCIBILITY :
This bug can be reproduced rarely.

CUSTOMER SUBMITTED WORKAROUND :
Do not use Math.random