--- old/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:27:55.303748995 -0700
+++ new/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:27:55.095749002 -0700
@@ -101,7 +101,6 @@
 // The knob* variables are effectively final.  Once set they should
 // never be modified hence.  Consider using __read_mostly with GCC.
 
-int ObjectMonitor::Knob_ExitRelease  = 0;
 int ObjectMonitor::Knob_InlineNotify = 1;
 int ObjectMonitor::Knob_Verbose      = 0;
 int ObjectMonitor::Knob_VerifyInUse  = 0;
--- old/src/hotspot/share/runtime/objectMonitor.hpp	2018-09-17 23:27:56.259748962 -0700
+++ new/src/hotspot/share/runtime/objectMonitor.hpp	2018-09-17 23:27:55.999748971 -0700
@@ -195,7 +195,6 @@
   static PerfCounter * _sync_Deflations;
   static PerfLongVariable * _sync_MonExtant;
 
-  static int Knob_ExitRelease;
   static int Knob_InlineNotify;
   static int Knob_Verbose;
   static int Knob_VerifyInUse;
--- old/src/hotspot/share/runtime/thread.cpp	2018-09-17 23:27:57.195748929 -0700
+++ new/src/hotspot/share/runtime/thread.cpp	2018-09-17 23:27:56.935748938 -0700
@@ -1959,7 +1959,7 @@
   //
   // ensure_join() ignores IllegalThreadStateExceptions, and so does
   // ObjectSynchronizer::release_monitors_owned_by_thread().
-  if (exit_type == jni_detach || ObjectMonitor::Knob_ExitRelease) {
+  if (exit_type == jni_detach) {
     // Sanity check even though JNI DetachCurrentThread() would have
     // returned JNI_ERR if there was a Java frame. JavaThread exit
     // should be done executing Java code by the time we get here.