--- old/src/share/vm/gc/parallel/psScavenge.cpp	2015-05-20 11:02:00.571269000 +0200
+++ new/src/share/vm/gc/parallel/psScavenge.cpp	2015-05-20 11:02:00.435264405 +0200
@@ -382,7 +382,6 @@
     // Get the active number of workers here and use that value
     // throughout the methods.
     uint active_workers = gc_task_manager()->active_workers();
-    heap->set_par_threads(active_workers);
 
     PSPromotionManager::pre_scavenge();