fluent/fluentd — pull request #364 by repeatedly (2014-06-23 03:04:36+00:00)
Title: Change debug log level to warn in in_syslog

Pattern mismatch log should be warn for early detection.
We can disable this message by `log_level error` in production.

https://groups.google.com/d/msg/fluentd/ZRreaaRFR2U/ineHN8FOGI0J