--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/test/jdk/jdk/jfr/api/consumer/TestToString.java	2018-04-09 16:36:28.028497518 +0200
@@ -0,0 +1,94 @@
+/*
+ * Copyright (c) 2018, 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.HashMap;
+import java.util.List;
+
+import jdk.jfr.Event;
+import jdk.jfr.Recording;
+import jdk.jfr.consumer.RecordedEvent;
+import jdk.test.lib.Asserts;
+import jdk.test.lib.jfr.Events;
+
+/*
+ * @test
+ * @summary Sanity checks that RecordedEvent#toString returns something valid
+ * @key jfr
+ * @library /test/lib
+ * @run main/othervm jdk.jfr.api.consumer.TestToString
+ */
+public class TestToString {
+
+    public static void main(String[] args) throws Throwable {
+
+        try (Recording recording = new Recording()) {
+            recording.start();
+            HelloWorldEvent event = new HelloWorldEvent();
+            event.message = "hello, world";
+            event.integer = 4711;
+            event.floatValue = 9898;
+            event.doubleValue = 313;
+            event.clazz = HashMap.class;
+            event.characater = '&';
+            event.byteValue = (byte) 123;
+            event.longValue = 1234567890L;
+            event.shortValue = 64;
+            event.booleanValue = false;
+            event.commit();
+            recording.stop();
+            List<RecordedEvent> events = Events.fromRecording(recording);
+            Events.hasEvents(events);
+            RecordedEvent e = events.get(0);
+            String toString = e.toString();
+            System.out.println(toString);
+            Asserts.assertTrue(toString.contains("hello, world"), "Missing String field value in RecordedEvent#toSting()");
+            Asserts.assertTrue(toString.contains("4711"), "Missing integer fields value in RecordedEvent#toSting()");
+            Asserts.assertTrue(toString.contains("313"), "Missing double value in RecordedEvent#toSting()");
+            Asserts.assertTrue(toString.contains("HashMap"), "Missing class value in RecordedEvent#toSting()");
+            Asserts.assertTrue(toString.contains("1234567890"), "Missing long value in RecordedEvent#toSting()");
+            Asserts.assertTrue(toString.contains("&"), "Missing char value in RecordedEvent#toSting()");
+            Asserts.assertTrue(toString.contains("123"), "Missing byte value in RecordedEvent#toString()");
+            Asserts.assertTrue(toString.contains("64"), "Missing short value in RecordedEvent#toString()");
+            Asserts.assertTrue(toString.contains("false"), "Missing boolean value in RecordedEvent#toString()");
+            Asserts.assertTrue(toString.contains("HelloWorldEvent"), "Missing class name in RecordedEvent#toString()");
+        }
+    }
+
+    static class HelloWorldEvent extends Event {
+        public boolean booleanValue;
+        public long longValue;
+        public int shortValue;
+        public byte byteValue;
+        public int doubleValue;
+        public char characater;
+        public Thread mainThread;
+        public Class<?> clazz;
+        public int floatValue;
+        public int integer;
+        public String message;
+    }
+}