src/java.base/share/classes/jdk/internal/logger/DefaultLoggerFinder.java

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -135,17 +135,25 @@
         final static SharedLoggers system = new SharedLoggers();
         final static SharedLoggers application = new SharedLoggers();
     }
 
     public static boolean isSystem(Module m) {
-        ClassLoader cl = AccessController.doPrivileged(new PrivilegedAction<>() {
+        final boolean isSystem = AccessController.doPrivileged(new PrivilegedAction<>() {
             @Override
-            public ClassLoader run() {
-                return m.getClassLoader();
+            public Boolean run() {
+                final ClassLoader moduleCL = m.getClassLoader();
+                if (moduleCL == null) return true;
+                ClassLoader cl = ClassLoader.getPlatformClassLoader();
+                while (cl != null && moduleCL != cl) {
+                    cl = cl.getParent();
+                }
+                // returns true if moduleCL is the platform class loader
+                // or one of its ancestors.
+                return moduleCL == cl;
             }
         });
-        return cl == null;
+        return isSystem;
     }
 
     @Override
     public final Logger getLogger(String name,  Module module) {
         checkPermission();