: Actually, I didn't technically "upgrade". I downloaded the new : version, grabbed the example, and pasted in the fields from my schema : into the new one. So the only two files I changed from the example are : schema.xml and solr.xml.
ok -- so with the fix for SOLR-3432, anyone who tries similar steps with 4.0-final will get a clear error on startup -- that was my main concern. thanks for clarifying. -Hoss