The design of this product changes fast, I see from the latest build that my configuration was being deprecated in favour of something else which is fine, and the warnings on start up were clear enough. The example on http://logstash.net/docs/1.2.1/filters/grok still contains the deprecated feature "type" and I think we should remove this.
You are completely right. We are working hard on updating all the docs after the 1.2.x release.
Documentation was completely reviewed and now live on
If you spot an issue or still an old example please report it to