--- /dev/null	2018-07-25 16:53:07.000000000 +0800
+++ new/test/jdk/com/sun/jndi/dns/ConfigTests/Timeout.java	2018-07-25 16:53:07.000000000 +0800
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2002, 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.
+ *
+ * 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.
+ */
+
+/*
+ * @test
+ * @bug 8200151
+ * @summary Tests that we can set the initial UDP timeout interval
+ *          and the number of retries.
+ * @modules java.base/sun.security.util
+ * @library ../lib/
+ * @run main Timeout
+ */
+
+import javax.naming.CommunicationException;
+import javax.naming.Context;
+import javax.naming.directory.DirContext;
+import javax.naming.directory.InitialDirContext;
+import java.net.SocketTimeoutException;
+import java.util.Hashtable;
+
+public class Timeout {
+    // Host 10.0.0.0 is a bit bucket, used here to simulate a DNS server that
+    // doesn't respond. 10.0.0.0 server shouldn't be reachable.
+    // Ping to this address should not give any reply
+    private static final String HOST = "10.0.0.0";
+    // Port 9 is a bit bucket, used here to simulate a DNS server that
+    // doesn't respond.
+    private static final int PORT = 9;
+
+    public static void main(String[] args) throws Exception {
+        Hashtable<Object, Object> env;
+
+        // initialize test
+        env = DNSTestUtils.initEnv(false, Timeout.class.getName(), args);
+
+        String allQuietUrl = "dns://" + HOST + ":" + PORT;
+
+        int timeout = 250;    // initial timeout = 1/4 sec
+        int retries = 5;    // try 5 times per server
+
+        env.put(Context.PROVIDER_URL, allQuietUrl);
+        env.put("com.sun.jndi.dns.timeout.initial", "" + timeout);
+        env.put("com.sun.jndi.dns.timeout.retries", "" + retries);
+
+        DirContext ctx = null;
+
+        try {
+            ctx = new InitialDirContext(env);
+
+            // Any request should fail after timeouts have expired.
+            long startTime = System.currentTimeMillis();
+            try {
+                ctx.getAttributes("");
+            } catch (CommunicationException e) {
+
+                long elapsedTime = System.currentTimeMillis() - startTime;
+                if (!(e.getRootCause() instanceof SocketTimeoutException)) {
+                    throw e;
+                }
+
+                long expectedTime = timeout * ((1 << retries) - 1);
+                DNSTestUtils.debug("Elapsed (ms):  " + elapsedTime);
+                DNSTestUtils.debug("Expected (ms): " + expectedTime);
+
+                // Check that elapsed time is as long as expected, and
+                // not more than 50% greater.
+                if (elapsedTime >= expectedTime
+                        && elapsedTime * 2 <= expectedTime * 3) {
+                    System.out.println("elapsed time is as long as expected.");
+                    return;
+                }
+                throw new RuntimeException(
+                        "Failed: timeout in " + elapsedTime + " ms, expected"
+                                + expectedTime + "ms");
+            }
+
+            throw new RuntimeException(
+                    "Failed: getAttributes succeeded unexpectedly");
+
+        } finally {
+            DNSTestUtils.cleanup(ctx);
+        }
+    }
+}