> com.example.CustomSimilarity cannot be cast to
> org.apache.lucene.search.Similarity
> at org.apache.solr.schema.IndexSchema.readConfig(IndexSchema.java:449)
> ... 28 more
I think you've got a class loader problem.
If you have solr-1.2.0 source code, see the line 499 of IndexSchema.java:
similarity =
(Similarity)Config.newInstance(node.getNodeValue().trim());
Change the line to:
Object o = Config.newInstance(node.getNodeValue().trim());
System.err.println("(1) The object " + o + " classloader is " +
o.getClass().getClassLoader());
System.err.println("(2) Class Similarity class loader is " +
Similarity.class.getClassLoader());
similarity = (Similarity) o;
You will see different classloader between (1) and (2).
I'm not familiar with jetty classloader, but you can
google "jetty classloader" to get a solution.
Cheers,
Koji
