[jira] Commented: (SOLR-1804) Upgrade Carrot2 to 3.2.0

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[jira] Commented: (SOLR-1804) Upgrade Carrot2 to 3.2.0

JIRA jira@apache.org

    [ https://issues.apache.org/jira/browse/SOLR-1804?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12890757#action_12890757 ]

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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