solr Using spring-data-solr with configurable Solr core Developing Java applications accessing data from Solr is easier with spring-data-solr. You can just use Repository interfaces, auto generated findBy... methods or @Query annotations to define your data sources. Unfortunately
solr Solr 4 packaged with logging libraries The Solr 4 web archive (war) does not ship with logging libraries any more. So everyone who want to deploy it into a container have to either include the logging libraries in the classpath of the container or repackage the solr with the logging