output -> file -> codec -> json writing in a single line instead of writing as new line for every set.
its hard for nxlog to parse thru thee output because there is no new line . its always a single line and never ending.
eg:
{"name":8,"@version":"1","@timestamp":"2016-11-09T06:40:00.789Z","type":"datadog1","app":"abc","time":"2016-11-09T06:40:00.789Z","field":"ppa","terminal":"openstack"}{"name":9,"@version":"1","@timestamp":"2016-11-09T06:40:00.789Z","type":"datadog","app":"abc","time":"2016-11-09T06:42:00.789Z","field":"ppa","terminal":"openstack"}