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https://issues.apache.org/jira/browse/SOLR-1804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12890757#action_12890757
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Stanislaw Osinski commented on SOLR-1804:
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{quote}
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?
{quote}
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.
{quote}
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?
{quote}
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: https://issues.apache.org/jira/browse/SOLR-1804
> Project: Solr
> Issue Type: Improvement
> Components: contrib - Clustering
> Reporter: Grant Ingersoll
> Assignee: Grant Ingersoll
> Attachments: SOLR-1804-carrot2-3.4.0-dev-libs.zip,
> SOLR-1804-carrot2-3.4.0-dev.patch
>
>
> http://project.carrot2.org/release-3.2.0-notes.html
> Carrot2 is now LGPL free, which means we should be able to bundle the binary!
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