--- a/hotspot/src/share/vm/gc_implementation/g1/g1MarkSweep.cpp	Wed Mar 03 08:10:41 2010 -0800
+++ b/hotspot/src/share/vm/gc_implementation/g1/g1MarkSweep.cpp	Wed Mar 03 14:48:26 2010 -0800
@@ -101,6 +101,8 @@
 
   GenMarkSweep::_marking_stack =
     new (ResourceObj::C_HEAP) GrowableArray<oop>(4000, true);
+  GenMarkSweep::_objarray_stack =
+    new (ResourceObj::C_HEAP) GrowableArray<ObjArrayTask>(50, true);
 
   int size = SystemDictionary::number_of_classes() * 2;
   GenMarkSweep::_revisit_klass_stack =