--- a/src/hotspot/share/runtime/thread.cpp	Tue Apr 17 23:27:41 2018 -0700
+++ b/src/hotspot/share/runtime/thread.cpp	Wed Apr 18 09:25:51 2018 +0200
@@ -246,6 +246,7 @@
   _threads_hazard_ptr = NULL;
   _nested_threads_hazard_ptr = NULL;
   _nested_threads_hazard_ptr_cnt = 0;
+  _rcu_counter = 0;
 
   // the handle mark links itself to last_handle_mark
   new HandleMark(this);