Basically I want to create a rock solid server.

while (keepRunning.get()) {
    try {
        Socket clientSocket = serverSocket.accept();

        ... spawn a new thread to handle the client ...
    } catch (IOException e) {
        e.printStackTrace();
        // NOW WHAT?
    }
}

In the IOException block, what to do? Is the Server socket at fault so it need to be recreated? For example wait a few seconds and then

serverSocket = ServerSocketFactory.getDefault().createServerSocket(MY_PORT);

However if the server socket is still OK, then it is a pity to close it and kill all previously accepted connections that are still communicating.

EDIT: After some answers, here my attempt to deal with the IOException. Would the implementation be guaranteeing keeping the server up and only re-create server socket when only necessary?

while (keepRunning.get()) {
    try {
        Socket clientSocket = serverSocket.accept();

        ... spawn a new thread to handle the client ...
        bindExceptionCounter = 0;
    } catch (IOException e) {
        e.printStackTrace();

        recreateServerSocket();
    }
}

private void recreateServerSocket() {
    while (keepRunning) {
        try {
            logger.info("Try to re-create Server Socket");
            ServerSocket socket = ServerSocketFactory.getDefault().createServerSocket(RateTableServer.RATE_EVENT_SERVER_PORT);

            // No exception thrown, then use the new socket.
            serverSocket = socket;
            break;
        } catch (BindException e) {
            logger.info("BindException indicates that the server socket is still good.", e);
            bindExceptionCounter++;

            if (bindExceptionCounter < 5) {
                break;
            }
        } catch (IOException e) {
            logger.warn("Problem to re-create Server Socket", e);
            e.printStackTrace();

            try {
                Thread.sleep(30000);
            } catch (InterruptedException ie) {
                logger.warn(ie);
            }
        }
    }
}