Okay well this is encouraging. I changed SweetSpotSimilarity to
MyClassSimilarity. I created this class in:
lucene/contrib/misc/src/java/org/apache/lucene/misc/
I am getting a ClassNotFoundException when I try to start solr.
Here is the contents of the MyClassSimilarity file:
package org.apache.lucene.misc;
import org.apache.lucene.search.DefaultSimilarity;
public class MyClassSimilarity extends DefaultSimilarity {
public MyClassSimilarity() { super(); }
public float idf(int a1, int a2) { return 1; }
}
So then this raises two questions. Why am I getting a classNotFoundException
and how can I go about fixing it?
Thanks,
Brian Lamb
On Mon, May 23, 2011 at 3:41 PM, Markus Jelsma
<markus.jel...@openindex.io>wrote:
> As far as i know, SweetSpotSimilarty needs be configured. I did use it once
> but
> wrapped a factory around it to configure the sweet spot. It worked just as
> expected and explained in that paper about the subject.
>
> If you use a custom similarity that , for example, caps tf to 1. Does it
> then
> work?
>
>
>
> > Hi all,
> >
> > I'm having trouble getting the basic similarity example to work. If you
> > notice at the bottom of the schema.xml file, there is a line there that
> is
> > commented out:
> >
> > <!-- <similarity class="org.apache.lucene.search.DefaultSimilarity"/> -->
> >
> > I uncomment that line and replace it with the following:
> >
> > <similarity class="org.apache.lucene.misc.SweetSpotSimilarity"/>
> >
> > Which comes natively with lucene. However, the scores before and after
> > making this change are the same. I did a full import both times but that
> > didn't seem to help.
> >
> > I ran svn up on both my solr directory and my lucene directory. Actually,
> > my lucene directory was not previously under svn so I removed everything
> > in there and did svn co
> > http://svn.apache.org/repos/asf/lucene/dev/trunk/lucene/
> >
> > So why isn't my installation taking the SweetSpot Similarity change?
> >
> > Thanks,
> >
> > Brian Lamb
>
