diff -r 02a4c08a8777 -r 1258121876f8 src/share/vm/jfr/writers/jfrJavaEventWriter.hpp
--- a/src/share/vm/jfr/writers/jfrJavaEventWriter.hpp	Fri Sep 27 10:27:29 2019 +0800
+++ b/src/share/vm/jfr/writers/jfrJavaEventWriter.hpp	Fri Sep 27 13:23:32 2019 +0800
@@ -33,14 +33,15 @@
 
 class JfrJavaEventWriter : AllStatic {
   friend class JfrCheckpointThreadClosure;
+  friend class JfrJavaEventWriterNotificationClosure;
   friend class JfrJavaEventWriterNotifyOperation;
-  friend class JfrJavaEventWriterNotificationClosure;
+  friend class JfrRecorder;
  private:
+  static bool initialize();
   static void notify(JavaThread* jt);
 
  public:
   static bool has_required_classes(TRAPS);
-  static bool initialize();
   static void notify();
   static jobject event_writer(Thread* t);
   static jobject new_event_writer(TRAPS);