A quick search (http://www.lucidimagination.com/search/?q=snowball+back+compatibility ) yields that Snowball was updated in LUCENE-1142 (http://issues.apache.org/jira/browse/LUCENE-1142 ) and that we discussed a little bit about back compatibility with regards to contrib.

In all likelihood, the change is actually due to the Snowball project changing how it stems those particular words. In which case, you could take it up w/ them, but it will come down to whether they view it as a bug (in which case it will be fixed) or whether they think it is the correct choice to make for most situations.


--------------------------
Grant Ingersoll
http://www.lucidimagination.com/

Search the Lucene ecosystem (Lucene/Solr/Nutch/Mahout/Tika/Droids) using Solr/Lucene:
http://www.lucidimagination.com/search


On Apr 15, 2009, at 3:57 PM, Otis Gospodnetic wrote:


I seem to recall some Snowball-related incompatibilities around Lucene 2.4.0 release, but can't find the exact details at the moment... but this was documented somewhere (Wiki?)

Otis
--
Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch



----- Original Message ----
From: oleg_gnatovskiy <oleg_gnatovs...@citysearch.com>
To: java-user@lucene.apache.org
Sent: Tuesday, April 14, 2009 7:26:41 PM
Subject: Re: Lucene SnowBall unexpected behavior for some terms


I am also noticing the same behavior. Does anyone know any solutions?

AlexElba wrote:

Hello,
I was working with lucene snowball 2.3.2 and I switch to 2.4.0.
After switch I came by to some case where lucene doesn't do lemmatization correctly. So far I found only one case spa - spas. spas are not getting
lemmatize at all...
BTW I saw the same behavior on solr 1.3


Anybody have any idea why?


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