: I am having trouble in upgrading from Solr 3.6 to Solr 4.4.0. I have : placed required jars in "lib" directory. When I start the Tomcat : instance it throws following error. Also pasted part of : "conf/schema.xml" file.
which jars exactly? where did you get the jars from? what version of solr were your custom jars compiled against : Caused by: java.lang.ClassCastException: class com.mycomp.as.sts.nps.solr.analysis.MultiValueTokenizerFactory According to that, your "MultiValueTokenizerFactory" can not be cast to the expected type -- this might be because of a classloader problem (ie: you may have multiple instances of the MultiValueTokenizerFactory class loaded that are confusing things, or multiple isntances of the lucene TokenizerFactory, etc... alternatively it might be because your MultiValueTokenizerFactory was compiled against the wrong version of solr (but IIRC that should genrate a diff error ... off the top of my head i'm not certain). -Hoss
