Please tell me how can I determine the version number of currently running solr ?
On the Solr Admin page click on [INFO]. The next screen will have the version.
(For me, the Solr admin page is located here: http://{host-name-or-ip}:{port}/solr/admin, I found I was dealing with an older version. Solr Specification Version: 1.4.0 Solr Implementation Version: 1.4.0 833479)