--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/nio/channels/Selector/KeysReady.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2002, 2012, 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 4530007
+ * @summary Test if keys reported ready multiple times
+ * @library ..
+ */
+
+import java.net.*;
+import java.nio.channels.*;
+import java.nio.channels.spi.SelectorProvider;
+
+public class KeysReady {
+
+    static void test(TestServers.DayTimeServer dayTimeServer) throws Exception {
+        InetSocketAddress isa
+            = new InetSocketAddress(dayTimeServer.getAddress(),
+                                    dayTimeServer.getPort());
+        SocketChannel sc = SocketChannel.open();
+        sc.configureBlocking(false);
+        sc.connect(isa);
+
+        // Prepare a selector
+        Selector selector = SelectorProvider.provider().openSelector();
+        try {
+            SelectionKey key = sc.register(selector, SelectionKey.OP_CONNECT);
+            int keysAdded = selector.select();
+            if (keysAdded > 0) {
+                keysAdded = selector.select(1000);
+                if (keysAdded > 0)
+                    throw new Exception("Same key reported added twice");
+            }
+        } finally {
+            selector.close();
+            sc.close();
+        }
+    }
+
+    public static void main(String[] args) throws Exception {
+        try (TestServers.DayTimeServer daytimeServer
+                = TestServers.DayTimeServer.startNewServer(50)) {
+            test(daytimeServer);
+        }
+    }
+
+}