majikthys/log4j2-logstash-jsonevent-layout — pull request #1 by michaelsembwever (2014-03-28 22:55:06+00:00)
Title: Add a new parameter "newline" to LogStashJSONLayout that formats compact  events on separate lines.

From docs:
If "true", adds newline after each event, only applicable when compact=true, defaults to "false".