otherwise throw exception/tag as parse failure see more context in https://github.com/logstash-plugins/logstash-codec-cef/pull/26#pullrequestreview-3551244 cef specification https://www.protect724.hpe.com/servlet/JiveServlet/downloadBody/1072-102-9-20354/CommonEventFormatv23.pdf
otherwise throw exception/tag as parse failure
see more context in #26 (review)
cef specification https://www.protect724.hpe.com/servlet/JiveServlet/downloadBody/1072-102-9-20354/CommonEventFormatv23.pdf