how to clear contents of ServletOutputStream?

I’m wondering how to delete all contents from ServletOutputStream (or any other OutputStream) in case when exception is occurred at some point and I need outputStream to be empty so that it doesn’t include “half of data”

doSmthInServlet(HttpServletResponse respone, ....) {
        try {
            ServletOutPutStream outputStream = response.getOutputStream();
            //.....
            //writing to outputstream
            //exception occurred
        } catch (Exception e) {
            // and here I need to clear all the contents of outputStream
        }
    }

Answer

ServletResponse.resetBuffer() to clear the buffer.

ServletResponse.reset() to clear the buffer, headers and response code.