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From Mark Miller <>
Subject Re: Solr 1.2 and 1.3 - different Stamming
Date Fri, 10 Jul 2009 19:00:00 GMT
Sorry. From the CHANGES for 1.3:
The Porter snowball based stemmers in Lucene were updated (LUCENE-1142),
and are not guaranteed to be backward compatible at the index level
(the stem of certain words may have changed).  Re-indexing is recommended.

Would have been nice to leave a back compat out, but I didn't see the
discussion around that, so I'm sure they did their best given the facts.

Be careful about reading the CHANGES file before upgrading Solr is my best

- Mark

On Fri, Jul 10, 2009 at 6:36 PM, Jae Joo <> wrote:

> I have found that the stamming in solr 1.2 and 1.3 is different for
> "communication". We have index built in Solr 1.2 and the index is being
> queried by 1.3. Is there any way to adjust it?
> Jae joo

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