--- a/src/hotspot/share/runtime/objectMonitor.cpp	Fri Dec 01 11:00:46 2017 -0500
+++ b/src/hotspot/share/runtime/objectMonitor.cpp	Fri Dec 01 17:03:07 2017 +0100
@@ -2152,6 +2152,7 @@
   _next     = NULL;
   _prev     = NULL;
   _notified = 0;
+  _notifier_tid = 0;
   TState    = TS_RUN;
   _thread   = thread;
   _event    = thread->_ParkEvent;