Error while reading inputstream : Software caused connection abort' in java server

I am basically trying to host a server on an Android Device. Client devices connect to the server over TCP and send requests. The server performs the action requested by the client and then writes data back to the socket. The connection is not terminated by the server and requests are to be continuously read over the socket and replied to.

Note: The first 4 bytes of each request message contain the length of the actual message/request.

The parseXmlInputAndExecuteCmd function executes various asynchronous operations depending on the content of the input XML string. This eventually causes a change in boolean value of 'allowResponse' variable to true and a certain response is generated which is stored in the variable of type String called 'response'. Once the boolean 'allowResponse' becomes true, the thread resumes execution and writes the response back to the socket's OutputStream

Some of these asynchronous operations include connecting and disconnecting from the corporate VPN. Could that be a cause of the error ?

Some Class level variables being used are :

private volatile boolean allowResponse = false;
private String response;

Server Code:

    private void startServer() {
    try {
        ServerSocket serverSocket = new ServerSocket(9200);
        while (true) {
            Socket connectionSocket = serverSocket.accept();
            BufferedInputStream bufInpStream = new BufferedInputStream(connectionSocket.getInputStream());
            BufferedOutputStream bufOutStream = new BufferedOutputStream(connectionSocket.getOutputStream());
            ByteArrayOutputStream contentLengthBaos = new ByteArrayOutputStream();
            int c;
            int count = 0;
            while ((c = bufInpStream.read()) != -1) {
                contentLengthBaos.write(c);
                count++;
                if (count == 4) {
                    int contLen = getMessageLength(contentLengthBaos);
                    String content = getMessageContent(bufInpStream, contLen);
                    parseXmlInputAndExecuteCmd(content);
                    count = 0;
                    while (!allowResponse) {
                        Thread.sleep(1000);
                    }
                    allowResponse = false;
                    byte[] responseDataBytes = response.getBytes();
                    int outputContLen = responseDataBytes.length;
                    byte[] contLengthBytes = ByteBuffer.allocate(4).putInt(outputContLen).array();
                    ByteArrayOutputStream o = new ByteArrayOutputStream();
                    o.write(contLengthBytes);
                    o.write(responseDataBytes);
                    byte finalOutPutBytes[] = o.toByteArray();
                    bufOutStream.write(finalOutPutBytes);
                    bufOutStream.flush();
                }
            }
        }
    } catch (IOException e) {
        e.printStackTrace();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}

@NonNull
private String getMessageContent(BufferedInputStream inFromClient, int contLen) throws IOException {
    ByteArrayOutputStream contentBaos = new ByteArrayOutputStream();
    byte[] contentBytes = new byte[contLen];
    for (int i = 0; i < contLen; i++) {
        contentBaos.write(inFromClient.read());
        ByteArrayInputStream bais = new ByteArrayInputStream(contentBaos.toByteArray());
        bais.read(contentBytes);
    }
    String content = new String(contentBytes);
    Log.d(TAG, "Content : " + content);
    return content;
}

private int getMessageLength(ByteArrayOutputStream contentLengthBaos) {
    byte[] firstFourBytesArr = contentLengthBaos.toByteArray();
    int contLen = new BigInteger(firstFourBytesArr).intValue();
    contentLengthBaos = new ByteArrayOutputStream();
    Log.d(TAG, "Content length: " + contLen);
    return contLen;
}

The server is started using the following lines of code:

Thread serverThread = new Thread(new Runnable() {
        @Override
        public void run() {
            startServer();
        }
    });
    serverThread.start();

I am getting the following error stacktrace:

W/System.err: java.net.SocketException: Software caused connection abort
                  at java.net.SocketInputStream.socketRead0(Native Method)
                  at java.net.SocketInputStream.socketRead(SocketInputStream.java:114)
W/System.err:     at java.net.SocketInputStream.read(SocketInputStream.java:170)
W/System.err:     at java.net.SocketInputStream.read(SocketInputStream.java:139)
W/System.err:     at java.io.BufferedInputStream.fill(BufferedInputStream.java:248)
W/System.err:     at java.io.BufferedInputStream.read(BufferedInputStream.java:267)
                  at com.example.umathur.myapplication.MainActivity.startServer(MainActivity.java:192)
                  at com.example.umathur.myapplication.MainActivity.access$000(MainActivity.java:61)
                  at com.example.umathur.myapplication.MainActivity$1.run(MainActivity.java:139)
                  at java.lang.Thread.run(Thread.java:764)

I am getting an error called: java.net.SocketException: Software caused connection abort

I'm not sure where I'm going wrong in the usage of the inputstream/outputstream. Im getting the error at the following line(Line number 192 as mentioned in the stacktrace) :

while ((c = inputStream.read()) != -1)

In some similar questions on StackOverflow, I saw people stating that it might be a corporate firewall configuration issue ? Is that correct ? If so, how do I get it fixed ?

Could this be an issue with the Client code (To which I don't have access) not being written correctly ?

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