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Date: Tue, 26 Mar 2013 11:16:22 +0100
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Subject: Re: lucene 42 codec
From: Mario Casola <mario.casola@gmail.com>
To: solr-user@lucene.apache.org
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thank you very much.

Mario

2013/3/25 Chris Hostetter <hossman_lucene@fucit.org>:
>
> : I noticed that apache solr 4.2 uses the lucene codec 4.1. How can I
> : switch to 4.2?
>
> Unless you've configured something oddly, Solr is already using the 4.2
> codec.
>
> What you are probably seeing is that the fileformat for several types of
> files hasn't changed from the 4.1 (or even 4.0) versions, so they are
> still used in 4.2 (and confusingly include "Lucene41" in the filenames in
> several cases).
>
> Note that in the 4.2 codec package javadocs, several codec related classes
> are not implemented, and the docs link back to the 4.1 and 4.0
> implementations...
>
> https://lucene.apache.org/core/4_2_0/core/org/apache/lucene/codecs/lucene42/package-summary.html
>
> If you peek inside the Lucene42Codec class you'll also see...
>
>   private final StoredFieldsFormat fieldsFormat = new Lucene41StoredFieldsFormat();
>   private final TermVectorsFormat vectorsFormat = new Lucene42TermVectorsFormat();
>   private final FieldInfosFormat fieldInfosFormat = new Lucene42FieldInfosFormat();
>   private final SegmentInfoFormat infosFormat = new Lucene40SegmentInfoFormat();
>   private final LiveDocsFormat liveDocsFormat = new Lucene40LiveDocsFormat();
>
> -Hoss