--- old/src/hotspot/share/runtime/mutex.cpp	2019-12-11 10:12:13.084217088 -0800
+++ new/src/hotspot/share/runtime/mutex.cpp	2019-12-11 10:12:12.812206852 -0800
@@ -157,18 +157,18 @@
 }
 
 void Mutex::unlock() {
-  assert_owner(Thread::current());
+  DEBUG_ONLY(assert_owner(Thread::current()));
   set_owner(NULL);
   _lock.unlock();
 }
 
 void Monitor::notify() {
-  assert_owner(Thread::current());
+  DEBUG_ONLY(assert_owner(Thread::current()));
   _lock.notify();
 }
 
 void Monitor::notify_all() {
-  assert_owner(Thread::current());
+  DEBUG_ONLY(assert_owner(Thread::current()));
   _lock.notify_all();
 }