Audit logs in external fluent only showss "pattern not match"

Issue

• When enabling audit-logging without specifying a certain output-file and integrating external fluentd below logs are seen :

2017-04-03 10:45:19 +0200 [warn]: pattern not match: "2017-04-03T10:45:19.51483537+02:00 AUDIT: id=\"28c6f224-ea23-4e57-aaa4-c6ef90aa1a4e\" response=\"200\""
2017-04-03 10:45:19 +0200 [warn]: pattern not match: "2017-04-03T10:45:19.787565867+02:00 AUDIT: id=\"98815ac4-e307-482d-9f00-4df294d5cb11\" ip=\"10.99.66.45\" method=\"GET\"