"Extractor dependency not found" problem

I follow the first hop at http://jackrabbit.apache.org/first-hops.html, but encounter errors. There are many errors message generated, one of them is 3950 [main] WARN org.apache.jackrabbit.core.query.lucene.JackrabbitTextExtractor - Extractor dependency not found: org.apache.jackrabbit.extracto

Re: JCR meetup in Amsterdam on April 8th

Jukka Zitting wrote: Hi all, In a few weeks I and many other Jackrabbit and Sling people will be attending the ApacheCon EU in Amsterdam [1], and I'd like to take the opportunity to organize a community meeting for JCR people. On Tuesday, April 8th, we have a chance of organizing a JCR meetup