logstash/logstash — pull request #407 by piavlo (2013-03-16 21:11:48+00:00)
Title: Allow empty arrays as values in grammar

Allow following config not to fail with parse error

filter {
grok {
tags => [ "apache-accesslog" ]
patterns_dir => [ "/opt/logstash/patterns" ]
match => [ "clientip", "%{IP}" ]
break_on_match => true
named_captures_only => true
tag_on_failure => [ ]
}
}