diff -r fd16c54261b3 -r 90ce3da70b43 jdk/test/java/net/Socket/DeadlockTest.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/test/java/net/Socket/DeadlockTest.java	Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,236 @@
+/*
+ * Copyright 1999 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ */
+
+/*
+ * @test
+ * @bug 4176738
+ * @summary Make sure a deadlock situation
+ *     would not occur
+ */
+
+import java.net.*;
+import java.io.*;
+
+public class DeadlockTest {
+    public static void main(String [] argv) throws Exception {
+
+        // Start the server thread
+        Thread s1 = new Thread(new ServerThread());
+        s1.start();
+
+        // Sleep to make sure s1 has created a server socket
+        Thread.sleep(1000);
+
+        // Start the client thread
+        ClientThread ct = new ClientThread();
+        Thread c1 = new Thread(ct);
+        c1.start();
+
+        // Wait for the client thread to finish
+        c1.join(40000);
+
+        // If timeout, we assume there is a deadlock
+        if (c1.isAlive() == true) {
+            // Close the socket to force the server thread
+            // terminate too
+            s1.stop();
+            ct.getSock().close();
+            throw new Exception("Takes too long. Dead lock");
+        }
+    }
+}
+
+class ServerThread implements Runnable {
+
+    private static boolean dbg = false;
+
+    ObjectInputStream  in;
+    ObjectOutputStream out;
+
+    ServerSocket server;
+
+    Socket sock;
+
+    public ServerThread() throws Exception {
+
+    }
+
+    public void ping(int cnt) {
+       Message.write(out, new PingMessage(cnt));
+    }
+
+    private int cnt = 1;
+
+    public void run() {
+
+        try {
+            if (Thread.currentThread().getName().startsWith("child") == false) {
+                server = new ServerSocket(4711);
+                sock  = server.accept();
+
+                new Thread(this, "child").start();
+
+                out = new ObjectOutputStream(sock.getOutputStream());
+                out.flush();
+
+                if (dbg) System.out.println("*** ping0 ***");
+                ping(0);
+                if (dbg) System.out.println("*** ping1 ***");
+                ping(1);
+                if (dbg) System.out.println("*** ping2 ***");
+                ping(2);
+                if (dbg) System.out.println("*** ping3 ***");
+                ping(3);
+                if (dbg) System.out.println("*** ping4 ***");
+                ping(4);
+                if (dbg) System.out.println("*** end ***");
+            }
+
+        } catch (Throwable e) {
+            // If anything goes wrong, just quit.
+        }
+
+        if (Thread.currentThread().getName().startsWith("child")) {
+            try {
+
+                in  = new ObjectInputStream(sock.getInputStream());
+
+                while (true) {
+                    if (dbg) System.out.println("read " + cnt);
+                    Message msg = (Message) in.readObject();
+                    if (dbg) System.out.println("read done " + cnt++);
+                    switch (msg.code) {
+                    case Message.PING: {
+                        if (true) System.out.println("ping recv'ed");
+                    } break;
+                    }
+
+                }
+
+            } catch (Throwable e) {
+                // If anything goes wrong, just quit.       }
+            }
+        }
+    }
+}
+
+class ClientThread implements Runnable {
+
+    ObjectInputStream  in;
+    ObjectOutputStream out;
+
+    Socket sock;
+
+    public ClientThread() throws Exception {
+        try {
+            System.out.println("About to create a socket");
+            sock = new Socket(InetAddress.getLocalHost().getHostName(), 4711);
+            System.out.println("connected");
+
+            out = new ObjectOutputStream(sock.getOutputStream());
+            out.flush();
+        } catch (Throwable e) {
+          System.out.println("client failed with: " + e);
+          e.printStackTrace();
+          throw new Exception("Unexpected exception");
+        }
+    }
+
+    public Socket getSock() {
+        return sock;
+    }
+
+    private int cnt = 1;
+
+    public void run() {
+        try {
+          in  = new ObjectInputStream(sock.getInputStream());
+
+          int count = 0;
+
+          while (true) {
+              System.out.println("read " + cnt);
+              Message msg = (Message) in.readObject();
+              System.out.println("read done " + cnt++);
+              switch (msg.code) {
+              case Message.PING: {
+                  System.out.println("ping recv'ed");
+                  count++;
+              } break;
+              }
+              if (count == 5) {
+                  sock.close();
+                  break;
+              }
+          }
+        }  catch (IOException ioe) {
+        } catch (Throwable e) {
+            // If anything went wrong, just quit
+        }
+    }
+
+}
+
+class Message implements java.io.Serializable {
+
+    static final int UNKNOWN = 0;
+    static final int PING = 1;
+
+    protected int code;
+
+    public Message() { this.code = UNKNOWN; }
+
+    public Message(int code) { this.code = code; }
+
+    private static int cnt = 1;
+
+    public static void write(ObjectOutput out, Message msg) {
+        try {
+            System.out.println("write message " + cnt);
+            out.writeObject(msg);
+            System.out.println("flush message");
+            out.flush();
+            System.out.println("write message done " + cnt++);
+        } catch (IOException ioe) {
+            // Ignore the exception
+        }
+     }
+}
+
+class PingMessage extends Message implements java.io.Serializable {
+
+      public PingMessage() {
+          code = Message.PING;
+      }
+
+      public PingMessage(int cnt)
+      {
+          code = Message.PING;
+          this.cnt = cnt;
+
+          data = new int[50000];
+      }
+
+      int cnt;
+      int[] data;
+}