Wow ... this is crazy looking ... as far as i can tell the only way to get an NPE at thta line is if the DocumentBuilder is being given a null IndexSchema when i'ts constructed. I don't know how that would happen.
can you zip up your solr/conf (so we have the schema and the config) and post it online somehwere? : admin/stats.jsp screen - the boxes core, update , cache and other are : now empty. I deleted and reinstalled solr (including the unpacked : webapps dir) but not tomcat and the problem is still there.... that's really weird ... i suggeggests that the info registry is being emptied out ... you said this problem continued after re-installing, i assume you stoped/started the port as well? -Hoss
