--- a/src/hotspot/share/jfr/recorder/repository/jfrEmergencyDump.cpp	Tue Oct 08 15:03:20 2019 +0100
+++ b/src/hotspot/share/jfr/recorder/repository/jfrEmergencyDump.cpp	Tue Oct 08 09:13:08 2019 -0700
@@ -393,6 +393,10 @@
     Service_lock->unlock();
   }
 
+  if (UseNotificationThread && Notification_lock->owned_by_self()) {
+    Notification_lock->unlock();
+  }
+
   if (CodeCache_lock->owned_by_self()) {
     CodeCache_lock->unlock();
   }