EDIT

at line 83 and 86 the out stream reference is null.

It is recommended to set the warning to error for these kind of code checks in Window->Preferences->Java->Compiler->!Errors/Warnings->Potential Programming Problems->Null Pointer Access

As a hot fix I simply commented the method body

public ModelAndView getData(@RequestParam("lsid") LSID lsid, 
                                @RequestParam("start") Integer start, 
                                @RequestParam("length") Integer length,
                                HttpServletResponse response) throws LSIDServerException, IOException  {
        OutputStream out = null;
        InputStream data = null;
        try {
            data = lsidDataService.getDataByRange(lsid,start,length);
            if(data != null) {
                response.setContentType("application/octet-stream");
                byte[] bytes = new byte[1024];
                int numbytes = data.read(bytes);
                while (numbytes != -1) {
                    out.write(bytes,0,numbytes);
                    numbytes = data.read(bytes);
                }
                out.flush();
            }
        } finally {
            if (out != null) {
                out.close();
            }

            if (data != null) {
                data.close();
            }
        }
        return null;
    }