Hello All!
The Dataverse Team has just merged the work upgrading Apache Solr from 4.6.0 to 7.2.1 . Anyone working with the develop branch will have to install Solr 7.2.1 and re-index from scratch. Dataverse releases from 4.9 on will not be compatible with 4.6.0, requiring an upgrade and re0index. For more information on the work, see its related story at https://github.com/IQSS/dataverse/issues/4158
Instructions can be found in the Dataverse develop branch or directly athttps://github.com/IQSS/dataverse/blob/1c46b334a4e843aa827e19b07738621327d6109c/doc/sphinx-guides/source/developers/dev-environment.rst#install-solr .
Be well,
-Matthew Dunlap
Developer, IQSS, Harvard University