@Override
  public void warning(final SAXParseException exception) throws SAXException {
    systemLogWriter.warning(
        "Warning while parsing XML [" + xmlFileName + "] at line " + exception.getLineNumber()
            + " column " + exception.getColumnNumber() + ": " + exception.getMessage(),
        exception);
  }
Log the exception at {@link LogWriter#warning(String)} level with XML filename and the position
of exception in the file.
geode-dunit/src/main/java/org/apache/geode/security/templates/XmlErrorHandler.java