--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/jdk/java/nio/channels/DatagramChannel/ManySenders.java	Sat Nov 30 16:21:19 2019 +0000
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 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
+ * 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 8234805
+ * @summary Test that DatagramChannel.receive returns the expected sender address
+ * @run main ManySenders
+ * @run main/othervm -Djava.net.preferIPv4Stack=true ManySenders
+ */
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.ObjectInputStream;
+import java.io.ObjectOutputStream;
+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.NetworkInterface;
+import java.net.SocketAddress;
+import java.nio.ByteBuffer;
+import java.nio.channels.DatagramChannel;
+import java.util.List;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class ManySenders {
+    public static void main(String[] args) throws Exception {
+
+        // use addresses on interfaces that have the loopback and local host
+        InetAddress lh = InetAddress.getLocalHost();
+        InetAddress lb = InetAddress.getLoopbackAddress();
+        List<InetAddress> addresses = Stream.concat(
+                NetworkInterface.getByInetAddress(lh).inetAddresses(),
+                NetworkInterface.getByInetAddress(lb).inetAddresses())
+                .filter(ia -> !ia.isAnyLocalAddress())
+                .distinct()
+                .collect(Collectors.toList());
+
+        // bind DatagramChannel to wildcard address so it can receive from any address
+        try (DatagramChannel reader = DatagramChannel.open()) {
+            reader.bind(new InetSocketAddress(0));
+            for (InetAddress address : addresses) {
+                System.out.format("%n-- %s --%n", address.getHostAddress());
+
+                // send 3 datagrams from the given address to the reader
+                test(3, address, reader);
+            }
+        }
+    }
+
+    static void test(int count, InetAddress address, DatagramChannel reader) throws Exception {
+        int remotePort = reader.socket().getLocalPort();
+        InetSocketAddress remote = new InetSocketAddress(address, remotePort);
+
+        try (DatagramChannel sender = DatagramChannel.open()) {
+            sender.bind(new InetSocketAddress(address, 0));
+
+            SocketAddress local = sender.getLocalAddress();
+            byte[] bytes = serialize(local);
+
+            SocketAddress previousSource = null;
+            for (int i = 0; i < count; i++) {
+                System.out.format("send %s -> %s%n", local, remote);
+                sender.send(ByteBuffer.wrap(bytes), remote);
+
+                ByteBuffer bb = ByteBuffer.allocate(1000);
+                SocketAddress source = reader.receive(bb);
+                System.out.format("received datagram from %s%n", source);
+
+                // check source address and payload
+                SocketAddress payload = deserialize(bb.array());
+                if (!source.equals(local))
+                    throw new RuntimeException("source=" + source + ", expected=" + local);
+                if (!payload.equals(local))
+                    throw new RuntimeException("payload=" + payload + ", expected=" + local);
+
+                // check that cached source was used
+                if (previousSource == null) {
+                    previousSource = source;
+                } else if (source != previousSource) {
+                    throw new RuntimeException("Cached SocketAddress not returned");
+                }
+            }
+        }
+    }
+
+    private static byte[] serialize(SocketAddress address) throws Exception {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        ObjectOutputStream oos = new ObjectOutputStream(baos);
+        oos.writeObject(address);
+        oos.close();
+        return baos.toByteArray();
+    }
+
+    private static SocketAddress deserialize(byte[] bytes) throws Exception {
+        ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
+        ObjectInputStream ois = new ObjectInputStream(bais);
+        return (SocketAddress) ois.readObject();
+    }
+}
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