solr1.4 is compatible for lucene2.9 version. If your index version is 3.0.3 then it can not be read by lucene2.9 version.
You can try to change solr's lucene2.9 jar with your lucene3.0.3 jar and restart your server Hope it may work. ----- Thanx: Grijesh -- View this message in context: http://lucene.472066.n3.nabble.com/Lucene-3-0-3-index-cannot-be-read-by-Solr-tp2396649p2403161.html Sent from the Solr - User mailing list archive at Nabble.com.