diff -r 7df7c1f71ccf -r 51b28beb53fd src/hotspot/share/jfr/writers/jfrJavaEventWriter.hpp
--- a/src/hotspot/share/jfr/writers/jfrJavaEventWriter.hpp	Tue Jul 02 14:31:43 2019 +0200
+++ b/src/hotspot/share/jfr/writers/jfrJavaEventWriter.hpp	Tue Jul 02 17:46:38 2019 +0200
@@ -33,13 +33,14 @@
 
 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 initialize();
   static void notify();
   static jobject event_writer(Thread* t);
   static jobject new_event_writer(TRAPS);