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From "Stanislaw Osinski (JIRA)" <>
Subject [jira] Commented: (SOLR-1804) Upgrade Carrot2 to 3.2.0
Date Wed, 21 Jul 2010 15:56:49 GMT


Stanislaw Osinski commented on SOLR-1804:

Hi Stanislaw: this looks cool! So, carrot2 jars don't depend directly on Lucene, and we can
re-enable this component in trunk, and simply maintain the LuceneLanguageModelFactory? 

Correct. The only dependency on Lucene is {{LuceneLanguageModelFactory}}, which is now part
of Solr code base. In fact, we could also try bringing back the clustering plugin to Solr
trunk, though I haven't tried that yet.

As far as the smart chinese, its currently not included with Solr, so I think this is why
you have trouble. But could we enable a carrot2 factory for it that reflects it, in case the
user puts the jar in the classpath?

Essentially, the dependency on the smart chinese is optional in a sense that the lack of it
will degrade the quality of clustering in Chinese, but will not break it. Let me see if I
can make it optionally loadable in {{LuceneLanguageModelFactory}} too. If not, we'll have
to live with degraded clustering quality in case of Chinese.

> Upgrade Carrot2 to 3.2.0
> ------------------------
>                 Key: SOLR-1804
>                 URL:
>             Project: Solr
>          Issue Type: Improvement
>          Components: contrib - Clustering
>            Reporter: Grant Ingersoll
>            Assignee: Grant Ingersoll
>         Attachments:, SOLR-1804-carrot2-3.4.0-dev.patch
> Carrot2 is now LGPL free, which means we should be able to bundle the binary!

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