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From yu shen <>
Subject Re: [Announce] Solr-RA, Solr with RankingAlgorithm
Date Tue, 06 Dec 2011 09:20:50 GMT
Hi Nagendra,

I tried to use solr-nrt-ra-3.4, while the dataimporthandler does not work.
The error message is:

INFO: created /dataimport:
Dec 6, 2011 1:16:18 AM org.apache.solr.common.SolrException log
SEVERE: java.lang.IncompatibleClassChangeError: Implementing class
    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClassCond(

The nrt feature is critical to my app, what would be wrong with it?


2011/1/19 Nagendra Nagarajayya <>

> Hi!
> I would like to announce Solr-RA, Solr with RankingAlgorithm. Solr-RA uses
> the RankingAlgorithm, a new scoring and ranking algorithm instead of Lucene
> to rank the searches. Solr with RA seems to enable Solr searches to be
> comparable to Google site search results, and much better than Lucene (perl
> index). RankingAlgorithm still uses the Lucene index to read documents but
> ranks and scores on its own. There is no change to the existing Solr setup,
> so searches, faceting, highlighting, etc. should work as before.
> You can get more information about Solr-RA from here:
> <>
> You can find the comparison paper between Google site search and Lucene
> here: /**docs/**TestWithPerlOrgComparisonWithG**
> oogleAndLucene.pdf/<>
> You can try out a demo (search Wikipedia, Perl/Php/Python indexes) here:
> Solr-RA has two modes, a Product mode and a Document mode for document
> searches. Document mode is for searching html, rich text (pdf/word, etc.),
> books, faq, forums, etc. while Product mode is for short text searches as
> in retail stores, ecommerce, etc.
> You can download Solr-RA from here: <
>> (free)
> You can download RankingAlgorithm from here:
> http://rankingalgorithm.tgels.**com <> <
> http://rankingalgorithm.** <>>
> (free)
> I would like you to try it (it is free) and provide us your valuable
> feedback. You can contact me at solr-ra at or at the above
> email address or on twitter @solr_ra.
> Sincerely,
> - Nagendra Nagarajayya

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