Help with HTTP Status 500 - The server encountered an internal error - NullPointerException

[mrush]

Two days ago we were getting error HTTP Status 500 - Could not determine database type (Network error IOException: Connection refused: connect).

We rebooted the server and now get HTTP Status 500 - Exception report - The server encountered an internal error that prevented it from fulfilling this request. - java.lang.NullPointerException.

We are using the built-in database.

Thanks for any assistance you could provide.

[Nic Brough -Adaptavist-]

Did you change anything on the server?

If not, and you are using the embedded database, then it's likely that you have lost your data.  It's going to be hard, or impossible to recover it as it stands, and even if you can make it work again, you will probably be missing loads of it.

I would move on - install a new test instance and import a copy from production.