Noticed the database connection screen has changed. Instead of showing a screen with entries from the DataBase.xml, it only prompts for a database password. What happened to the ability to enter other information on this screen? Would prefer the screen show the ability to modify other aspects of the connection or just state you need to modify DataBase.xml. Not an issue, but usability and downtime documentation issue.
I ran into the same issue as @henryxyz. I changed the IP of the SQL server and updated it in the server tools, tested the connection and it came back positive. Restarted tomcat and was prompted with the DB connection error. Took me a minute to realize that it was still querying the old SQL server instead of the new one. Went and edited DataBase.xml and all came backup fine. This should be edited to let admins change the IP/hostname of the SQL server.