Reconcile SOLR server/client versions
DataONE schema uses SOLR v3.x and Metacat-indexer wants to use SOLR v4.x (for the client capabilities). There are schema incompatibilities between the two.
We could potentially run the server on 3.x and use the 4.x client to communicate with it. But this needs to be tested.
- fork and modify the existing DataONE schema to comply with 4.x features.
- encourage (force) DataONE to upgrade their SOLR deployment to use 4.x