Reading XML data in POST method of Servlet via InputStream truncate at 7500 characters in JBoss EAP 6

Issue

• From a servlet, when reading data from the request to parse as XML, it gets truncated to around 7500 characters.
• Following is the code sample:

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
                String xml = null;
                try {
                        byte[] xmlData = new byte[request.getContentLength()];

                        //Start reading XML Request as a Stream of Bytes
                        InputStream sis = request.getInputStream();
                        BufferedInputStream bis = new BufferedInputStream(sis);

                        bis.read(xmlData, 0, xmlData.length);

                        if (request.getCharacterEncoding() != null) {
                                xml = new String(xmlData, request.getCharacterEncoding());
                        } else {
                                xml = new String(xmlData);
                        }
                        //xml and xmlData contains incomplete data
                } catch (IOException ioe) {
                   ...
                }