You are already logged on to this server.

[ItsHarry]

Sometimes, players will see this message even though they are not logged on. When it happened to myself, it took about four retries before login finally succeeded.

[ItsHarry]

Unfortunately, this still seems to be happening. There is a post about it on my forums and it seems like almost all of my players have experienced this at least once.

[ItsHarry]

I have found one possible cause of this issue: If you log in to the server but cancel while it is still on "Logging in..", the error seems to happen.

[minecrafter]

Then it's probably a Bungee issue

[markusmarkusz]

Another way to cause this problem: Lose connection to the server.

It seems like sometimes the player isn't removed from redis when you aren't disconnect correctly.

[ethan-gallant]

If your redis server goes down all of a sudden this will happen or if your spigot servers aren't stopped correctly. There should be some form of failsafe but end-game all you have to do to fix it is not kill your bungeecords or database and if it does happen just FLUSHALL in redis.

[markusmarkusz]

@volxz There are several ways to make this problem occurring.

[ethan-gallant]

@markusmarkusz can you tell me any other ways to recreate the problem aside from improper shutdowns?

[MedicOP]

Read above

[markusmarkusz]

@volxz

Another way to cause this problem: Lose connection to the server.

It seems like sometimes the player isn't removed from redis when you aren't disconnect correctly.

[ghost]

@markusmarkusz I'm aware of this, I've been working on a from-the-ground-up rewrite of RedisBungee for the past few months, haven't been able to finish it due to work.

[ethan-gallant]

@chnkr did you fix this yet?

[Mystiflow]

Possibly related to SpigotMC/BungeeCord#2371