--- old/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:28:40.159747433 -0700
+++ new/src/hotspot/share/runtime/objectMonitor.cpp	2018-09-17 23:28:39.943747440 -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_VerifyMatch  = 0;
 int ObjectMonitor::Knob_SpinLimit    = 5000;    // derived by an external tool -
 
 static int Knob_SpinBase            = 0;       // Floor AKA SpinMin
--- old/src/hotspot/share/runtime/objectMonitor.hpp	2018-09-17 23:28:41.119747399 -0700
+++ new/src/hotspot/share/runtime/objectMonitor.hpp	2018-09-17 23:28:40.859747408 -0700
@@ -195,7 +195,6 @@
   static PerfCounter * _sync_Deflations;
   static PerfLongVariable * _sync_MonExtant;
 
-  static int Knob_VerifyMatch;
   static int Knob_SpinLimit;
 
   void* operator new (size_t size) throw();
--- old/src/hotspot/share/runtime/synchronizer.cpp	2018-09-17 23:28:42.015747368 -0700
+++ new/src/hotspot/share/runtime/synchronizer.cpp	2018-09-17 23:28:41.755747377 -0700
@@ -1799,15 +1799,6 @@
   ReleaseJavaMonitorsClosure(Thread* thread) : THREAD(thread) {}
   void do_monitor(ObjectMonitor* mid) {
     if (mid->owner() == THREAD) {
-      if (ObjectMonitor::Knob_VerifyMatch != 0) {
-        ResourceMark rm;
-        Handle obj(THREAD, (oop) mid->object());
-        tty->print("INFO: unexpected locked object:");
-        javaVFrame::print_locked_object_class_name(tty, obj, "locked");
-        fatal("exiting JavaThread=" INTPTR_FORMAT
-              " unexpectedly owns ObjectMonitor=" INTPTR_FORMAT,
-              p2i(THREAD), p2i(mid));
-      }
       (void)mid->complete_exit(CHECK);
     }
   }