: Most likely you have missed to point data directory in solrconf.xml, : this should help : : http://wiki.apache.org/solr/SolrConfigXml#dataDir_parameter
right .. double check what the dataDir setting looks like ... if it's unset it uses "data" in your solr instance directory, but if it is set, it's (unfortunately) evaluated relative to the "current working directory" of your servlet container and some versions of solr had "./data" listed in the example solrconfig.xml -Hoss
