So I woke up this morning to find my shiny new Solr install had corrupted a core 😐 and I was unable to create a one in the UI
Then all you need to do is restart Solr, and you can now create a fresh core in the UI. Once you have that, reindex your documents, and you’re all set to go again!
Update: It happened again this morning. I think it’s because I exit my VM and vagrant halt, which usually shuts everything down gracefully. So make sure you run /opt/solr/solr-4.10.2/bin/solr stop (or equivalent) before shutting down your machine.