I0422 13:55:41.395537       1 serving.go:386] Generated self-signed cert in-memory
E0422 13:55:41.397269       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"