The following query works well for me
http://[]:8983/solr/vault/select?q=VersionComments%3AWhite
returns all the documents where version
As far as I know you should only have the declared once in your requestHandler
Typically what I do is copy all the fields that i want to search into a default search field called text.
schema.xml:
solrconfig.xml
*:*
explicit
10
text
If this is not good enough, you can always search other fields using a dismax search with the qf declaration like so:
http://localhost:8983/solr/vault/select/?q= White&defType=dismax&qf=PackageName+Tag+VersionComments+VersionTag+Description+SKU+SKUDesc