--- /dev/null	2017-11-09 09:38:01.297999907 +0100
+++ new/test/jdk/jdk/jfr/api/recording/event/TestRecordingEnableDisable.java	2018-04-09 17:16:19.775054137 +0200
@@ -0,0 +1,124 @@
+/*
+ * 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.recording.event;
+
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Random;
+
+import jdk.jfr.EventType;
+import jdk.jfr.Recording;
+import jdk.test.lib.Asserts;
+import jdk.test.lib.jfr.SimpleEvent;
+import jdk.test.lib.jfr.SimpleEventHelper;
+
+/*
+ * @test
+ * @summary Enable, disable, enable event during recording.
+ * @key jfr
+ * @library /test/lib
+ * @run main/othervm jdk.jfr.api.recording.event.TestRecordingEnableDisable
+ */
+public class TestRecordingEnableDisable {
+    private static final String EVENT_PATH = "java.file_write";
+    private static final Random rand = new Random(0);
+
+    public static void main(String[] args) throws Throwable {
+
+        Recording rA = new Recording();
+        Recording rB = new Recording();
+
+        rA.setName("rA");
+        rB.setName("rB");
+
+        final Path path = Paths.get(".", "my.jfr");
+        rA.start();
+        rB.start();
+
+        for (int i = 0; i < 30; ++i) {
+            SimpleEventHelper.createEvent(i);
+            if (isMyEventEnabled(rA, rB)) {
+                System.out.println("MyEvent enabled");
+            }
+            else {
+                System.out.println("MyEvent disabled");
+            }
+
+            Files.write(path, "A".getBytes());
+            if (isIoEnabled(rA, rB)) {
+                System.out.println("IoEvent enabled");
+            }
+            else {
+                System.out.println("IoEvent disabled");
+            }
+            Recording r = ((i % 2) == 0) ? rA : rB;
+            updateSettings(r);
+        }
+
+        rA.stop();
+        rB.stop();
+        rA.close();
+        rB.close();
+    }
+
+
+    private static void updateSettings(Recording r) {
+        int operationIndex = rand.nextInt(4);
+        switch (operationIndex) {
+            case 0:
+                SimpleEventHelper.enable(r, true);
+                break;
+            case 1:
+                SimpleEventHelper.enable(r, false);
+                break;
+            case 2:
+                r.enable(EVENT_PATH).withoutStackTrace();
+                break;
+            case 3:
+                r.disable(EVENT_PATH);
+                break;
+            default:
+                Asserts.fail("Wrong operataionIndex. Test error");
+            }
+    }
+
+    private static boolean isMyEventEnabled(Recording rA, Recording rB) {
+        long eventTypeId = EventType.getEventType(SimpleEvent.class).getId();
+        String settingName = "@" + eventTypeId + "#enabled";
+        return isEnabled(rA, settingName) || isEnabled(rB, settingName);
+    }
+
+    private static boolean isIoEnabled(Recording rA, Recording rB) {
+        String settingName = EVENT_PATH + "#enabled";
+        return isEnabled(rA, settingName) || isEnabled(rB, settingName);
+    }
+
+    private static boolean isEnabled(Recording r, String settingName) {
+        System.out.printf("R(%s) %s=%s%n", r.getName(), settingName, r.getSettings().get(settingName));
+        return Boolean.parseBoolean(r.getSettings().get(settingName));
+    }
+}