Tengo el siguiente código en el lado del applet:

URL servlet = new URL(appletCodeBase, "FormsServlet?form=requestRoom");
URLConnection con = servlet.openConnection();

con.setDoOutput(true);
con.setDoInput(true);
con.setUseCaches(false);
con.setRequestProperty("Content-Type", "application/octet-stream");

ObjectOutputStream out = new ObjectOutputStream(con.getOutputStream());
out.writeObject(user);//user is an object of a serializable class
out.flush();
out.close();

ObjectInputStream in = new ObjectInputStream(con.getInputStream());
status = (String)in.readObject();
in.close();
if("success".equals("status")) {
    JOptionPane.showMessageDialog(rootPane, "Request submitted successfully.");
} else {
    JOptionPane.showMessageDialog(rootPane, "ERROR! Request cannot be made at this 
    time");
}

En el lado del servlet, recibo el código de la siguiente manera:

    form = request.getParameter("form");
    if("requestRoom".equals(form)) {
        String fullName, eID, reason;
        UserRequestingRoom user;

        try {
            in = new ObjectInputStream(request.getInputStream());
            user = (UserRequestingRoom)in.readObject();
            fullName = user.getFullName();
            eID = user.getEID();
            reason = user.getReason();

            Class.forName("com.mysql.jdbc.Driver");
            Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/chat_applet","root","");
            PreparedStatement statement = con.prepareStatement("INSERT INTO REQCONFROOM VALUES(\"" + fullName + "\",\"" + eID + "\",\"" + reason + "\")");
            statement.execute();

            out = new ObjectOutputStream(response.getOutputStream());
            out.writeObject("success");
            out.flush();

        } catch (Exception e)  {
            e.printStackTrace();
            out = new ObjectOutputStream(response.getOutputStream());
            out.writeObject("fail");
            out.flush();
        }
    }

Cuando hago clic en el botón que llama al código en el lado del applet, aparece el siguiente error:

java.io.EOFException
    at java.io.ObjectInputStream$PeekInputStream.readFully(Unknown Source)
    at java.io.ObjectInputStream$BlockDataInputStream.readShort(Unknown Source)
    at java.io.ObjectInputStream.readStreamHeader(Unknown Source)
    at java.io.ObjectInputStream.<init>(Unknown Source)
    at com.org.RequestRoomForm.requestActionPerformed(RequestRoomForm.java:151)

    **//Line 151 is "ObjectInputStream in..." line in the applet code**

    at com.org.RequestRoomForm.access$000(RequestRoomForm.java:7)
    at com.org.RequestRoomForm$1.actionPerformed(RequestRoomForm.java:62)
    at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
    at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
    at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
    at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
    at java.awt.Component.processMouseEvent(Unknown Source)
    at javax.swing.JComponent.processMouseEvent(Unknown Source)
    at java.awt.Component.processEvent(Unknown Source)
    at java.awt.Container.processEvent(Unknown Source)
    at java.awt.Component.dispatchEventImpl(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
    at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
    at java.awt.Container.dispatchEventImpl(Unknown Source)
    at java.awt.Window.dispatchEventImpl(Unknown Source)
    at java.awt.Component.dispatchEvent(Unknown Source)
    at java.awt.EventQueue.dispatchEvent(Unknown Source)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
    at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
    at java.awt.EventDispatchThread.run(Unknown Source)

¿Por qué recibo este error? Me sonrojé cuando salí, también cerré las conexiones, pero recibí el error. ¿Alguna razón para esto?