dedicate Server save error.

[raven forge]

So when i try to save the game theres always this error and the characters are not saved ..

ERROR: Multiplayer f:21521, t:1770323898987, st:1,560,236,509> GameServer.main> Exception thrown
java.nio.BufferOverflowException at Buffer.nextPutIndex(null:-1). Message: Server processing error
Stack trace:
java.base/java.nio.Buffer.nextPutIndex(Unknown Source)
java.base/java.nio.HeapByteBuffer.putChar(Unknown Source)
zombie.characters.PlayerCraftHistory.save(PlayerCraftHistory.java:68)
zombie.characters.IsoPlayer.save(IsoPlayer.java:1428)
zombie.iso.IsoObject.save(IsoObject.java:1323)
zombie.savefile.ServerPlayerDB$NetworkCharacterData.<init>(ServerPlayerDB.java:49)
zombie.savefile.ServerPlayerDB.serverUpdateNetworkCharacter(ServerPlayerDB.java:179)
zombie.savefile.ServerPlayerDB.save(ServerPlayerDB.java:162)
zombie.network.ServerMap.QueuedSaveAll(ServerMap.java:697)
zombie.network.ServerMap.preupdate(ServerMap.java:838)
zombie.network.GameServer.main(GameServer.java:965)

need some help

So i do have a restart every 3 Hours and sometimes this happens and i cant save ... and the chars gets rollback some mins

[crimson torrent]

Most likely save-data overflow. With lots of mods, a player can end up with massive ModData (player/global or item modData , big tables/strings).
When the character save gets serialized it can exceed the buffer and you’ll see BufferOverflowException / KahluaTableImpl.save, then the character sometimes won’t save on dedicated.

Reducing mods / removing items with heavy modData / clearing bloated modData usually fixes it.
Basically don't subs to every possible mods

[raven forge]

but there are ~25 mods on the server

[bleak knot]

This issue should be fixed on the next B42 patch

[hard frost]

Hi! I'm experiencing the same issue, but in my case, my character only rolls back when I encounter another bug (I recently reported here about crucibles duplicating when pouring liquid).
My question is: is it possible to restore a saved character? I managed to make character backups, and the character files seem to be in place: the PNG images of the last location are correct and all files were updated in the correct time. But placing the backup back into the save folder doesn't work. 🙁

[bleak knot]

Did you create a manual backup? Because the in game backup function doesnt work.

[hard frost]

Yes, I mean, I copied server name and server name_player folders after the last exit and then put it back after we met this bug. I did this a couple times before, but with this bug it didn't help.

[bleak knot]

I would suggest waiting for the patch in that case

[hard frost]

TYSM for reply! Btw could you please tell us if there's any information about the patch's approximate release date? I'm not subscribed to any news channels and might have missed it.