--- a/test/jdk/sun/net/www/protocol/http/UserAuth.java	Thu Aug 15 15:39:43 2019 +0800
+++ b/test/jdk/sun/net/www/protocol/http/UserAuth.java	Thu Aug 15 12:58:27 2019 +0100
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2006, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2006, 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
@@ -81,7 +81,19 @@
      * Http Server
      */
     void startHttpServer() throws IOException {
-        httpServer = com.sun.net.httpserver.HttpServer.create(new InetSocketAddress(0), 0);
+        InetAddress address = InetAddress.getLocalHost();
+        if (!InetAddress.getByName(address.getHostName()).equals(address)) {
+            // if this happens then we should possibly change the client
+            // side to use the address literal in its URL instead of
+            // the host name.
+            throw new IOException(address.getHostName()
+                                  + " resolves to "
+                                  + InetAddress.getByName(address.getHostName())
+                                  + " not to "
+                                  + address + ": check host configuration.");
+        }
+
+        httpServer = com.sun.net.httpserver.HttpServer.create(new InetSocketAddress(address, 0), 0);
 
         // create HttpServer context
         HttpContext ctx = httpServer.createContext("/redirect/", new RedirectHandler());