Consultation on issues with version 0.5.0

[meguoe]

This is the content of my configuration file.

system {
    threads-per-service 24
    daemonize true
    pid-file "/tmp/river.pid"
    upgrade-socket "/tmp/river.sock"
}
services {
    Server {
        listeners {
            "0.0.0.0:80"
        }
        connectors {
            "192.168.110.110:7003"
        }
    }
}

1、Is it normal that repeating the startup command three times creates three processes without any conflicts?
river --config-kdl config.kdl --pidfile="/tmp/river.pid" --upgrade-socket="/tmp/river.sock" --threads-per-service=24 --daemonize

2、Not creating the upgrade-socket file.

3、An error is prompted when specifying --upgrade for hot loading.