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From Patrick Diviacco <patrick.divia...@gmail.com>
Subject java.lang.IncompatibleClassChangeError with BM25BooleanQuery
Date Tue, 19 Apr 2011 12:48:35 GMT
Hi, I get this error:

Exception in thread "main" java.lang.IncompatibleClassChangeError:
Implementing class
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
at NVoting.<init>(NVoting.java:143)
at Main.main(Main.java:8)


on this line:

booleanQuery.add(new BM25BooleanQuery(current_tags[i],
"tags",
new StandardAnalyzer(org.apache.lucene.util.Version.LUCENE_31)),
BooleanClause.Occur.SHOULD);

I'm using an implementation of BM25 Okapi retrieval system:
http://nlp.uned.es/~jperezi/Lucene-BM25

Can you help me to fix the issue ? I'm using Lucene 3.1
thanks

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