diff -r c1b24f26deed -r d5cbedffb50b hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp
--- a/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Thu May 21 09:23:00 2015 +0200
+++ b/hotspot/src/share/vm/gc/g1/g1CollectedHeap.cpp	Thu May 21 09:23:46 2015 +0200
@@ -4326,7 +4326,6 @@
   ParallelTaskTerminator* terminator() { return &_terminator; }
 
   virtual void set_for_termination(uint active_workers) {
-    _root_processor->set_num_workers(active_workers);
     terminator()->reset_for_reuse(active_workers);
     _n_workers = active_workers;
   }