+ grok {
+ match => { "agent" => "%{JOSM:[useragent][name]=JOSM}/%{POSINT:[useragent][major]}\.%{POSINT:[useragent][minor]} \(%{POSINT:[useragent][patch]} \w+\) " }
+ overwrite => [ "[useragent][name]", "[useragent][major]", "[useragent][minor]", "[useragent][patch]" ]
+ tag_on_failure => []
+ }