Hi, It's a bit unexpected that startup and shutdown a ratis server with an empty state machine (extends BaseStateMachine without any override) returns this error:
> Failed to FORMAT: One or more existing directories found The data under the directory should be compatible between the two starting-ups. You can reproduce it with [1] running EtcdServer's main function twice. I don't know why I encountered this exception and if it's a bug or if I should modify the application logic. Best, tison. [1] https://github.com/tisonkun/ratis-etcd
