客户端未收到服务器的响应

Question

美好的一天，我从服务器发送消息后，客户端并不总是收到响应。用什么可以连接？ 这是用于处理消息并从服务器发送响应的代码：

class CommunicationThread implements Runnable {

        private Socket clientSocket;

        private InputStream input;

        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        public CommunicationThread(Socket clientSocket) {
            this.clientSocket = clientSocket;
            tempClientSocket = clientSocket;
            try {
                this.input = this.clientSocket.getInputStream();
            } catch (IOException e) {
                e.printStackTrace();
                showMessage("Error Connecting to Client!!", Color.RED);
            }
            showMessage("Connected to Client!!", greenColor);
        }
        public byte[] intToByteArray(int a)
        {
            byte[] ret = new byte[4];
            ret[3] = (byte) (a & 0xFF);
            ret[2] = (byte) ((a >> 8) & 0xFF);
            ret[1] = (byte) ((a >> 16) & 0xFF);
            ret[0] = (byte) ((a >> 24) & 0xFF);
            return ret;
        }
        public byte[] hexStringToByteArray(String s) {
            byte[] b = new byte[s.length() / 2];
            for (int i = 0; i < b.length; i++) {
                int index = i * 2;
                try{
                int v = Integer.parseInt(s.substring(index, index + 2), 16);
                b[i] = (byte) v;
                }catch(NumberFormatException ex){ // handle your exception
                }
            }
            return b;
        }
        int iread = 0;
        int max_read = 120;


        public void run() {

            while (!Thread.currentThread().isInterrupted()) {
                try {
                    boolean send = false;
                    String message_str = "";
                    byte[] content = new byte[ 2048 ];
                    int bytesRead = -1;
                    while( ( bytesRead = input.read( content ) ) != -1 ) {
                        baos.write( content, 0, bytesRead );
                    }
                    ByteArrayInputStream bais = new ByteArrayInputStream( baos.toByteArray() );

                    int b;
                    int index_for_byte_size = 0;
                    int length_mess = 0;
                    List<Byte> List_byte = new ArrayList<Byte>();
                    List<Byte> List_byte_for_size = new ArrayList<Byte>();
                    while((b=bais.read())!=-1){
                        if (index_for_byte_size < 4){
                            List_byte_for_size.add((byte) (b & 0xFF));
                            ++index_for_byte_size;
                        }
                        else{
                            List_byte.add((byte) (b & 0xFF));
                            ++length_mess;
                        }
                    }

                    byte[] byte_message = new byte[length_mess];
                    byte[] byte_message_size = new byte[4];

                    for (int i = 0; i < List_byte.size(); ++i){
                        byte_message[i] = List_byte.get(i);
                    }
                    for (int i = 0; i < List_byte_for_size.size(); ++i){
                        byte_message_size[i] = List_byte_for_size.get(i);
                    }
                    String string_size_Hex = bytesToHex(byte_message_size);
                    String string_mess_Hex = bytesToHex(byte_message);

                    //showMessage("Client(byte size): " + string_size_Hex, greenColor);
                    //showMessage("Client(mess): " + string_mess_Hex, greenColor);

                    String str = decodingByteArray(byte_message, byte_message_size);
                    //showMessage("Client(decode): " + str, greenColor);
                    int i2 = 0;
                    String TA_ID = "";
                    String mess_id = "";
                    String QR_ID = "";
                    String Card_type = "";
                    String message[] = new String[100];
                    for (int i = 0; i < 100; ++i){
                        message[i] = "";
                    }
                    for (int i = 0; i < str.length(); ++i){
                        if (str.charAt(i) == ';'){
                            ++i2;
                        }
                        else{
                            message[i2] += str.charAt(i);
                        }
                    }

                    showMessage("Client(code): " + message[0], greenColor);



    //There is missing code for processing responses.
.................................................


//sendMessage(encodingByteArray());
                    if (send == true) {
                        byte[] message_str2 = message_str.getBytes("windows-1251");
                        //sendMessage(encodingByteArray(message_str2));
                        DataOutputStream dOut = new DataOutputStream(tempClientSocket.getOutputStream());

                        dOut.write(encodingByteArray(message_str2));           // write the message
                        dOut.flush();
                        if (!tempClientSocket.isClosed()){
                            if (message != null){
                                showMessage("TA send mess!", Color.RED);
                            }
                            else{
                                showMessage("message null", Color.RED);
                            }
                            showMessage("Ta Disconnected", Color.RED);
                            showMessage("TA local ip:" + clientSocket.getLocalAddress().toString(), Color.RED);
                        }
                        else{
                            showMessage("socket close", Color.RED);
                        }
                        dOut.close();
                    }


                    try {
                        showMessage("socket close", Color.RED);
                        tempClientSocket.close();
                    } catch (IOException e) {
                        showMessage("socket not close", Color.RED);
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }

                    //serverThread.interrupt();
                    //serverThread = null;
                    //serverThread = new Thread(new ServerThread());
                    //serverThread.start();
                    Thread.interrupted();
                    break;
                } catch (IOException e) {
                    e.printStackTrace();
                }

            }
        }

    }

可能是什么问题？路由器是否无法到达数据？ 已经尝试了一切，但我不明白原因。请帮忙，非常必要！