--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/com/sun/jndi/dns/ConfigTests/PortUnreachable.java	Mon Oct 22 13:53:39 2018 +0800
@@ -0,0 +1,105 @@
+/*
+ * 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.
+ */
+
+import javax.naming.CommunicationException;
+import javax.naming.Context;
+import javax.naming.directory.InitialDirContext;
+
+/*
+ * @test
+ * @bug 8200151
+ * @summary Tests that when a DNS server is unreachable and an ICMP Destination
+ *          Unreachable packet is received, we fail quickly and don't wait for
+ *          the full timeout interval. This could be caused, for example, by a
+ *          dead DNS server or a flakey router.
+ * @library ../lib/
+ * @modules java.base/sun.security.util
+ * @run main PortUnreachable
+ */
+
+public class PortUnreachable extends DNSTestBase {
+
+    // Port 25 is the SMTP port, used here to simulate a dead DNS server.
+    private static final int PORT = 25;
+
+    // Threshold in ms for elapsed time of request failed. Normally, it should
+    // be very quick, but consider to different platform and test machine
+    // performance, here we define 1000 ms as threshold which acceptable for
+    // this test.
+    private static final int THRESHOLD = 1000;
+
+    private long startTime;
+
+    public PortUnreachable() {
+        setLocalServer(false);
+    }
+
+    public static void main(String[] args) throws Exception {
+        new PortUnreachable().run(args);
+    }
+
+    /*
+     * Tests that when a DNS server is unreachable and an ICMP Destination
+     * Unreachable packet is received, we fail quickly and don't wait for
+     * the full timeout interval.
+     */
+    @Override
+    public void runTest() throws Exception {
+        String deadServerUrl = "dns://localhost:" + PORT;
+        env().put(Context.PROVIDER_URL, deadServerUrl);
+        setContext(new InitialDirContext(env()));
+
+        // Any request should fail quickly.
+        startTime = System.currentTimeMillis();
+        context().getAttributes("");
+
+        // You're running a DNS server on your SMTP port?
+        throw new RuntimeException(
+                "Failed: getAttributes succeeded unexpectedly");
+    }
+
+    @Override
+    public boolean handleException(Exception e) {
+        if (e instanceof CommunicationException) {
+            long elapsedTime = System.currentTimeMillis() - startTime;
+
+            Throwable cause = ((CommunicationException) e).getRootCause();
+            if (!(cause instanceof java.net.PortUnreachableException)) {
+                DNSTestUtils.debug("Bug 7164518 can cause this failure on mac");
+                return false;
+            }
+
+            DNSTestUtils.debug("Elapsed (ms):  " + elapsedTime);
+
+            // Check that elapsed time is less than defined threshold.
+            if (elapsedTime < THRESHOLD) {
+                return true;
+            }
+
+            throw new RuntimeException("Failed: call took " + elapsedTime
+                    + " ms, expected less than " + THRESHOLD + " ms");
+        }
+
+        return super.handleException(e);
+    }
+}