diff -r 2cdf4a989ee7 -r 8ba5b3c76857 src/hotspot/share/classfile/systemDictionary.cpp
--- a/src/hotspot/share/classfile/systemDictionary.cpp	Tue Aug 28 13:22:57 2018 +0530
+++ b/src/hotspot/share/classfile/systemDictionary.cpp	Mon Sep 10 16:49:01 2018 -0400
@@ -861,8 +861,15 @@
         check_constraints(d_hash, k, class_loader, false, THREAD);
 
         // Need to check for a PENDING_EXCEPTION again; check_constraints
-        // can throw and doesn't use the CHECK macro.
+        // can throw but we may have to remove entry from the placeholder table below.
         if (!HAS_PENDING_EXCEPTION) {
+          // Record dependency for non-parent delegation.
+          // This recording keeps the defining class loader of the klass (k) found
+          // from being unloaded while the initiating class loader is loaded
+          // even if the reference to the defining class loader is dropped
+          // before references to the initiating class loader.
+          loader_data->record_dependency(k);
+
           { // Grabbing the Compile_lock prevents systemDictionary updates
             // during compilations.
             MutexLocker mu(Compile_lock, THREAD);
@@ -2177,6 +2184,7 @@
     InstanceKlass* sd_check = find_class(d_hash, name, dictionary);
     if (sd_check == NULL) {
       dictionary->add_klass(d_hash, name, k);
+
       notice_modification();
     }
   #ifdef ASSERT