bbPress.org

When using a socket, you need something like this:

https://bbpress.org/forums/topic/cannot-select-db-error?replies=11#post-12434

It’s OK to start a new topic as well. All these recent topics dredging up old problems that are sort of close make it hard to solve the latest problem, your problem. A lot of the earlier advice in this thread doesn’t apply to your specific problem.