CoreContainer.java, in the method 'load', finds itself calling loader.NewInstance with an 'fname' of Log4j of the slf4j backend is 'Log4j'.
e.g.: 2012-05-01 10:40:32,367 org.apache.solr.core.CoreContainer - Unable to load LogWatcher org.apache.solr.common.SolrException: Error loading class 'Log4j' What is it actually looking for? Have I misplaced something?