--- /dev/null	2018-06-17 23:18:20.806999507 +0800
+++ new/test/jdk/jfr/api/consumer/TestRecordedThreadGroupParent.java	2019-01-29 11:00:41.904737684 +0800
@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2013, 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;
+
+import java.util.List;
+
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.jfr.consumer.RecordedThreadGroup;
+import jdk.testlibrary.Asserts;
+import jdk.testlibrary.jfr.Events;
+import jdk.testlibrary.jfr.SimpleEvent;
+
+/*
+ * @test
+ * @summary Tests getParent method in RecordedThreadGroup
+ * @key jfr
+ * @library /lib/testlibrary
+ * @run main/othervm jdk.jfr.api.consumer.TestRecordedThreadGroupParent
+ */
+public class TestRecordedThreadGroupParent {
+
+    public static void main(String[] args) throws Exception {
+        ThreadGroup beforeStartGroup = new ThreadGroup(new ThreadGroup(new ThreadGroup("Grandfather"), "Father"), "Son");
+        Thread beforeThread = new Thread(beforeStartGroup, () -> new SimpleEvent().commit(), "Before Recording Start");
+
+        try (Recording r = new Recording()) {
+            r.enable(SimpleEvent.class).withoutStackTrace();
+            r.start();
+            beforeThread.start();
+            ThreadGroup afterStartGroup = new ThreadGroup(new ThreadGroup(new ThreadGroup("Grandmother"), "Mother"), "Daughter");
+            Thread afterThread = new Thread(afterStartGroup, () -> new SimpleEvent().commit(), "After Recording Start");
+            afterThread.start();
+
+            beforeThread.join();
+            afterThread.join();
+
+            r.stop();
+
+            List<RecordedEvent> events = Events.fromRecording(r);
+            Events.hasEvents(events);
+            for (RecordedEvent e : events) {
+                System.out.println(e);
+                switch (e.getThread().getJavaName()) {
+                case "Before Recording Start":
+                    assetrThreadGroupParents(beforeStartGroup, e.getThread().getThreadGroup());
+                    break;
+                case "After Recording Start":
+                    assetrThreadGroupParents(afterStartGroup, e.getThread().getThreadGroup());
+                    break;
+                default:
+                    Asserts.fail("Unexpected thread found "  + e.getThread().getJavaName());
+                }
+            }
+        }
+    }
+
+    private static void assetrThreadGroupParents(ThreadGroup realGroup, RecordedThreadGroup recordedGroup) {
+        if (recordedGroup == null && realGroup == null) {
+            return; // root
+        }
+        Asserts.assertNotNull(recordedGroup, "Parent thread group should not be null");
+        Asserts.assertEquals(realGroup.getName(), recordedGroup.getName(), "Parent thread group names don't match");
+        assetrThreadGroupParents(realGroup.getParent(), recordedGroup.getParent());
+    }
+}