elasticsearch/logstash — pull request #1682 by wiibaa (2014-09-01 19:43:03+00:00)
Title: filter/date Fallback to en locale + better failure logging and tag_on_failure

Some more improvments to date filter:
* use a fallback parser with english locale when platform default is non-english (LOGSTASH-785)
* improve register error report with invalid pattern (LOGSTASH-1487)
* improve date parsing final failure log (add the config) & tag_on_failure logic
(LOGSTASH-777,LOGSTASH-915)