diff -r 2c3cc4b01880 -r c16ac7a2eba4 test/jdk/jdk/jfr/api/consumer/streaming/TestLatestEvent.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/jdk/jfr/api/consumer/streaming/TestLatestEvent.java	Wed Oct 30 19:43:52 2019 +0100
@@ -0,0 +1,135 @@
+/*
+ * Copyright (c) 2019, 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
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package jdk.jfr.api.consumer.streaming;
+
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+import jdk.jfr.Event;
+import jdk.jfr.FlightRecorder;
+import jdk.jfr.Name;
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.EventStream;
+import jdk.jfr.consumer.RecordingStream;
+
+/**
+ * @test
+ * @summary Verifies that EventStream::openRepository() read from the latest flush
+ * @key jfr
+ * @requires vm.hasJFR
+ * @library /test/lib
+ * @run main/othervm jdk.jfr.api.consumer.streaming.TestLatestEvent
+ */
+public class TestLatestEvent {
+
+    @Name("NotLatest")
+    static class NotLatestEvent extends Event {
+
+        public int id;
+    }
+
+    @Name("Latest")
+    static class LatestEvent extends Event {
+    }
+
+    @Name("MakeChunks")
+    static class MakeChunks extends Event {
+    }
+
+    public static void main(String... args) throws Exception {
+        CountDownLatch notLatestEvent = new CountDownLatch(6);
+        CountDownLatch beginChunks = new CountDownLatch(1);
+
+        try (RecordingStream r = new RecordingStream()) {
+            r.onEvent("MakeChunks", event-> {
+                System.out.println(event);
+                beginChunks.countDown();
+            });
+            r.onEvent("NotLatest", event -> {
+                System.out.println(event);
+                notLatestEvent.countDown();
+            });
+            r.startAsync();
+            MakeChunks e = new MakeChunks();
+            e.commit();
+
+            System.out.println("Waiting for first chunk");
+            beginChunks.await();
+            // Create 5 chunks with events in the repository
+            for (int i = 0; i < 5; i++) {
+                System.out.println("Creating empty chunk");
+                try (Recording r1 = new Recording()) {
+                    r1.start();
+                    NotLatestEvent notLatest = new NotLatestEvent();
+                    notLatest.id = i;
+                    notLatest.commit();
+                    r1.stop();
+                }
+            }
+            System.out.println("All empty chunks created");
+
+            // Create event in new chunk
+            NotLatestEvent notLatest = new NotLatestEvent();
+            notLatest.id = 5;
+            notLatest.commit();
+
+            // This latch ensures thatNotLatest has been
+            // flushed and a new valid position has been written
+            // to the chunk header
+            notLatestEvent.await(80, TimeUnit.SECONDS);
+            if (notLatestEvent.getCount() != 0) {
+               Recording rec =  FlightRecorder.getFlightRecorder().takeSnapshot();
+               Path p = Paths.get("error-not-latest.jfr").toAbsolutePath();
+               rec.dump(p);
+               System.out.println("Dumping repository as a file for inspection at " + p);
+               throw new Exception("Timeout 80 s. Expected 6 event, but got "  + notLatestEvent.getCount());
+            }
+
+            try (EventStream s = EventStream.openRepository()) {
+                System.out.println("EventStream opened");
+                AtomicBoolean foundLatest = new AtomicBoolean();
+                s.onEvent(event -> {
+                    String name = event.getEventType().getName();
+                    System.out.println("Found event " + name);
+                    foundLatest.set(name.equals("Latest"));
+                });
+                s.startAsync();
+                // Must loop here as there is no guarantee
+                // that the parser thread starts before event
+                // is flushed
+                while (!foundLatest.get()) {
+                    LatestEvent latest = new LatestEvent();
+                    latest.commit();
+                    System.out.println("Latest event emitted. Waiting 1 s ...");
+                    Thread.sleep(1000);
+                }
+            }
+        }
+    }
+}