diff -r 2c3cc4b01880 -r c16ac7a2eba4 src/jdk.jfr/share/classes/jdk/jfr/internal/MetadataRepository.java
--- a/src/jdk.jfr/share/classes/jdk/jfr/internal/MetadataRepository.java	Wed Oct 30 16:14:56 2019 +0100
+++ b/src/jdk.jfr/share/classes/jdk/jfr/internal/MetadataRepository.java	Wed Oct 30 19:43:52 2019 +0100
@@ -46,6 +46,7 @@
 import jdk.jfr.Threshold;
 import jdk.jfr.ValueDescriptor;
 import jdk.jfr.internal.RequestEngine.RequestHook;
+import jdk.jfr.internal.consumer.RepositoryFiles;
 import jdk.jfr.internal.handlers.EventHandler;
 
 public final class MetadataRepository {
@@ -207,10 +208,14 @@
     }
 
     public synchronized List<EventControl> getEventControls() {
-        List<EventControl> controls = new ArrayList<>();
+        List<Class<? extends jdk.internal.event.Event>> eventClasses = jvm.getAllEventClasses();
+        ArrayList<EventControl> controls = new ArrayList<>(eventClasses.size() + nativeControls.size());
         controls.addAll(nativeControls);
-        for (EventHandler eh : getEventHandlers()) {
-            controls.add(eh.getEventControl());
+        for (Class<? extends jdk.internal.event.Event> clazz : eventClasses) {
+            EventHandler eh = Utils.getHandler(clazz);
+            if (eh != null) {
+                controls.add(eh.getEventControl());
+            }
         }
         return controls;
     }
@@ -263,7 +268,9 @@
             storeDescriptorInJVM();
         }
         jvm.setOutput(filename);
-
+        if (filename != null) {
+            RepositoryFiles.notifyNewFile();
+        }
         unregisterUnloaded();
         if (unregistered) {
             if (typeLibrary.clearUnregistered()) {
@@ -309,4 +316,11 @@
         throw new InternalError("Mirror class must have annotation " + MirrorEvent.class.getName());
     }
 
+    public synchronized void flush() {
+        if (staleMetadata) {
+            storeDescriptorInJVM();
+        }
+        jvm.flush();
+    }
+
 }