Hi Tommaso, you are definitely right! I see that the method : MultiFields.getTerms returns : if (termsPerLeaf.size() == 0) { return null; }
As you correctly mentioned this is not handled in : org/apache/lucene/classification/document/SimpleNaiveBayesDocumentClassifier.java:115 org/apache/lucene/classification/document/SimpleNaiveBayesDocumentClassifier.java:228 org/apache/lucene/classification/SimpleNaiveBayesClassifier.java:243 Can you do the change or should I open a Jira issue and attach the simple patch for you to commit? let me know, Regards ----- --------------- Alessandro Benedetti Search Consultant, R&D Software Engineer, Director Sease Ltd. - www.sease.io -- Sent from: http://lucene.472066.n3.nabble.com/Solr-User-f472068.html