I can reproduce - I agree, this seems like a bug. I've opened an issue: https://issues.apache.org/jira/browse/SOLR-3737
Thanks for reporting! Steve -----Original Message----- From: sausarkar [mailto:sausar...@ebay.com] Sent: Thursday, August 16, 2012 6:42 PM To: solr-user@lucene.apache.org Subject: RE: Solr4.0 BETA - Error when StempelPolishStemFilterFactory No I tried that, Solr is finding and loading all the other contrib jars but only for the Polish one it is complaining, it seems like this is a bug.