I'm trying to use (project.core/stop-app) and (start-app) from the REPL to restart my server, but it fails. I get SocketException The transport's socket appears to have lost its connection to the nREPL server.

Is this supposed to work with Luminus out of the box?

Ah, it's the (shutdown-agents) call in the stop-app function

Ohhh I'm supposed to use the user namespace