I0330 15:37:34.823174       1 serving.go:386] Generated self-signed cert in-memory
E0330 15:37:34.824877       1 run.go:72] "command failed" err="failed to create listener: failed to listen on 0.0.0.0:10257: listen tcp 0.0.0.0:10257: bind: address already in use"