This looks similar to this:
http://jira.xwiki.org/browse/XE-1399
http://lists.xwiki.org/pipermail/users/2015-February/029906.html
You could also try to rerol your backups,
then try to delete the xml files stated in the bug report. (After you
have a proper backup).
Have you restarted your application server after replacing everything?
Did you made any changes to the catalina folder?
Greetings, Louis
Am 24.10.2015 um 15:20 schrieb Keith Davis:
Failed to lookup configured Solr instance typ