diff -r 0f1e29c77e50 -r 0fb70c9118ce src/hotspot/share/classfile/systemDictionary.cpp
--- a/src/hotspot/share/classfile/systemDictionary.cpp	Wed Jul 10 05:12:23 2019 +0100
+++ b/src/hotspot/share/classfile/systemDictionary.cpp	Wed Jul 10 07:58:24 2019 -0400
@@ -98,7 +98,6 @@
 SymbolPropertyTable*   SystemDictionary::_invoke_method_table = NULL;
 ProtectionDomainCacheTable*   SystemDictionary::_pd_cache_table = NULL;
 
-int         SystemDictionary::_number_of_modifications = 0;
 oop         SystemDictionary::_system_loader_lock_obj     =  NULL;
 
 InstanceKlass*      SystemDictionary::_well_known_klasses[SystemDictionary::WKID_LIMIT]
@@ -1039,11 +1038,7 @@
       // Add to class hierarchy, initialize vtables, and do possible
       // deoptimizations.
       add_to_hierarchy(k, CHECK_NULL); // No exception, but can block
-
       // But, do not add to dictionary.
-
-      // compiled code dependencies need to be validated anyway
-      notice_modification();
     }
 
     // Rewrite and patch constant pool here.
@@ -1880,7 +1875,6 @@
 void SystemDictionary::initialize(TRAPS) {
   // Allocate arrays
   _placeholders        = new PlaceholderTable(_placeholder_table_size);
-  _number_of_modifications = 0;
   _loader_constraints  = new LoaderConstraintTable(_loader_constraint_size);
   _resolution_errors   = new ResolutionErrorTable(_resolution_error_size);
   _invoke_method_table = new SymbolPropertyTable(_invoke_method_size);
@@ -2164,8 +2158,6 @@
     InstanceKlass* sd_check = find_class(d_hash, name, dictionary);
     if (sd_check == NULL) {
       dictionary->add_klass(d_hash, name, k);
-
-      notice_modification();
     }
   #ifdef ASSERT
     sd_check = find_class(d_hash, name, dictionary);