8316193: jdk/jfr/event/oldobject/TestListenerLeak.java java.lang.Exception: Could not find leak

Backport-of: f6be922952642f40dcf0d27b7896c9a6acdd6378

test/jdk/jdk/jfr/event/oldobject/TestListenerLeak.java

 /*
- * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2018, 2023, 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
@@ -71,15 +71,17 @@ public class TestListenerLeak {
 
     public static void main(String[] args) throws Exception {
         WhiteBox.setWriteAllObjectSamples(true);
-
+        while (true) {
             try (Recording r = new Recording()) {
                 r.enable(EventNames.OldObjectSample).withStackTrace().with("cutoff", "infinity");
                 r.start();
                 listenerLeak();
                 r.stop();
                 List<RecordedEvent> events = Events.fromRecording(r);
-            if (OldObjects.countMatchingEvents(events, Stuff[].class, null, null, -1, "listenerLeak") == 0) {
-                throw new Exception("Could not find leak with " + Stuff[].class);
+                if (OldObjects.countMatchingEvents(events, Stuff[].class, null, null, -1, "listenerLeak") != 0) {
+                    return; // Success
+                }
+                System.out.println("Could not find leak with " + Stuff[].class + ". Retrying.");
             }
         }
     }