Thanks Chris for a quick response. But I verified that I only have the following jars lucene-analyzers-common-4.5.1 lucene-core-4.5.1 lucene-queries-4.5.1 lucene-spatial-4.5.1 solr-solrj-4.5.1
they are all the same version. Also how can I verify the classpath ? Since I do not have other lucene/solr versions I assume it might just be fine. --additional information also I have added a lib tag in my solrconfig.xml <lib dir="../../../lib" regex=".*\.jar" /> this points to the path where i have my jar that contains my PayloadSimilarity class also I see in the logs that the file gets added to org.apache.solr.core.SolrResourceLoader On Jan 27, 2014, at 5:32 PM, Chris Hostetter <hossman_luc...@fucit.org> wrote: > > : Caused by: java.lang.ClassCastException: <mypackage>.PayloadSimilarity > : cannot be cast to org.apache.lucene.search.similarities.Similarity > > If you are getting this error even though you subclass DefaultSimilarity, > i suspect that one or both of the following has happened: > > 1) you've compiled your PayloadSimilarity against a different version of > solr the lucene/solr jars then what you are running with > 2) you've got multiple versions of the lucene similarity jars in your > classpath at runtime. > > > > -Hoss > http://www.lucidworks.com/
