Index: vm/vmcore/src/kernel_classes/javasrc/java/lang/Thread.java =================================================================== --- vm/vmcore/src/kernel_classes/javasrc/java/lang/Thread.java (revision 453105) +++ vm/vmcore/src/kernel_classes/javasrc/java/lang/Thread.java (working copy) @@ -750,7 +750,9 @@ * @com.intel.drl.spec_ref */ public final void stop() { - stop(new ThreadDeath()); + if (isAlive()) { + stop(new ThreadDeath()); + } } /**