[MC-14923] Players can be kicked for spamming in a singleplayer world with cheats disabled

In a single player world with cheats disabled, sending lots of messages in the chat repeatedly causes the player to be kicked from the world for spamming.

Steps to Reproduce:

Create or join a world with cheats disabled
Spam messages in chat (sleeping in a bed can make this easier)

Expected & Observed Results:

❌ - Player is kicked from the world.
✔ - The player would not be kicked, as it's a singleplayer world, and the only player that can see the messages is the one who sent them.

Screenshots/Videos:

[media]

Notes:

When kicked, the player is sent to the multiplayer screen. (Tracked in MC-45602)

Linked issues

is duplicated by 22

MC-6648 Single player Disconnect.spam Resolved

MC-15149 spam crash Resolved

MC-15192 Spam Kick Out of Game in Singleplayer Resolved

MC-53034 disconnection for spam in SSP Resolved

MC-150762 Kicked from local world after spamming in chat Resolved

17 more links

relates to 1

MC-112602 "disconnect.spam" kick message is untranslated Resolved

Attachments

crash-2013-04-28_20.31.52-server.txt

latest.log

MC-14923.mp4

Comments 35

Anon Ymus 2013-04-30T00:50:58Z

Your Java version is out of date. Please update your Java to the latest version: http://www.java.com/en/download/. Keep in mind that when using a 32-bit browser on a 64-bit OS the automatic version detection will only show the 32-bit version of Java, the 64-bit version needs to be downloaded manually: http://www.java.com/en/download/manual.jsp.
Please report if the issue persists with the latest Java version.

John Smith 2013-05-01T02:35:18Z

Downloaded java version 7 update 21, and verified that I have the most recent update on Internet Explorer 64-bit. This cleared up the crash, however I was still kicked from my world. It seems to have only solved half of the problem. I'm still trying to figure out why some worlds I get kicked and others not.

John Smith 2013-05-01T03:02:45Z

Ok, I think I figured out the source-this bug only occurs on worlds where cheats are NOT enabled. It had nothing to do with previous world generation, besides from the fact that cheats were not given to worlds created before cheats were introduced (I haven't made a survival world since 1.1). I just made a survival world in 1.5.2 , no cheats, and started to spam the chat in a bed and got kicked.

Tails 2013-05-28T19:38:10Z

Confirmed in 13w21b.

Aaron Loyd 2013-06-12T17:31:28Z

I generated a world in 1.5.2 and I had this happen to me.

25 more comments

Aaron Loyd 2013-06-12T17:31:57Z

It also sends you to the Multiplayer Server selection

John Smith 2015-09-01T04:25:48Z

I'm surprised this didn't get buried. I just tested it in 1.8.8, it hard crashed me again (no crash log or screen). You probably did not spam fast enough, it takes about 15-20 entries within 3 seconds to get it. This issue can probably be taken down though, it was a sort of a joke when I submitted this. Either way I attached the log.

shufboyardee 2015-11-10T22:50:02Z

Still happens in 15w45a. Too late John Smith, it's taken on a life of its own!!

EDIT: I am not able to get a proper kick, with a kick message, rather just a freeze and a crash. Can anyone confirm?

Anon Ymus 2015-11-11T22:37:38Z

I get the disconnect.spam message.

marcono1234 2015-12-20T17:59:52Z

Confirmed for

15w51b

The reason why "disconnect.spam" is shown is because the method processChatMessage(C01PacketChatMessage packetIn) of the net.minecraft.network.NetHandlerPlayServer class (MCP 1.8 names) calls the kicking method with the translation string:

this.kickPlayerFromServer("disconnect.spam");

The string parameter is however not a translated chat component, but only a normal chat component. This could be probably fixed by creating a ChatTranslationComponent first an receiving the translation:

this.kickPlayerFromServer(new ChatComponentTranslation("disconnect.spam", new Object[0]).getFormattedText());

wobst.michael 2016-10-29T21:05:55Z

Is this still an issue in the most recent versions (currently that is 1.10.2, or 16w43a) of Minecraft? If so, please update the affected versions and help us keeping this ticket updated from time to time. If you are the owner/reporter of this ticket, you can modify the affected version(s) yourself.

pokechu22 2018-04-15T22:03:23Z

Resolving as duplicate of MC-112602 (the untranslated message, which was fixed back in 1.12) and MC-92255 (the freeze).

violine1101 2019-05-05T22:06:57Z

Reopened, as the duplicate tickets don't cover being kicked in single player for spamming.

IHaveAProblem 2019-12-14T18:07:08Z

This works on Demo mode, allowing non premium players access to the server screen. (And cracked servers)

Mateus Pereira Milbradt 2020-09-26T23:42:53Z

I can't reproduce in 1.16.3. Edit: nevermind, is really needed to test with cheats disabled.

Nick Rodi 2020-11-14T00:41:00Z

This is still a problem in 1.16.4. I successfully reproduced the bug.

One extra thing: It takes you to multiplayer tab instead of the main menu OR the single player tab, proving that this is in fact a bug.

Avoma 2020-12-01T16:46:18Z

Can confirm in 20w48a. I've attached a video which shows this issue in action.

Avoma 2020-12-20T12:18:12Z

Can confirm in 20w51a.

Avoma 2021-01-28T14:30:53Z

Can confirm in 21w03a.

Avoma 2021-02-06T11:38:30Z

Can confirm in 21w05b.

Avoma 2021-02-12T13:20:22Z

Can confirm in 21w06a.

Avoma 2021-02-18T19:10:35Z

Can confirm in 21w07a.

Avoma 2021-03-29T12:30:42Z

Can confirm in 21w11a.

Avoma 2021-04-19T09:30:27Z

Can confirm in 21w15a. @unknown 1.16.4 has already been marked as affected. 🙂

Avoma 2021-04-30T13:22:13Z

Can confirm in 21w17a.

Avoma 2021-06-22T11:43:25Z

Can confirm in 1.17.

ampolive 2021-06-28T15:42:32Z

Can confirm in 1.17.1 Pre-release 1.

Avoma 2021-08-24T12:02:32Z

Can confirm in 1.17.1.

Marty McFly 2022-04-05T18:59:23Z

Affects 22w13a

Tomasz Zakrzewski 2022-05-12T07:31:58Z

I've tested this in 1.18.2 and I can confirm that the kick does occur in this version. The reason why this doesn't occur with cheats enabled is the fact that the user is granted operator status when cheats are enabled while the world is loaded. With cheats disabled, the player won't be granted operator status upon loading the world. Operator has immunity from the built-in anti spam feature of the server.

Sindre Hvidsten 2022-05-30T12:56:35Z

Can confirm in 1.19 Pre-release 3

Avoma 2022-06-13T12:18:16Z

Can confirm in 1.19.

BadPiggy221 2022-07-23T10:07:47Z

I think it is because minecraft singleplayer runs as an integrated server which therefore has server features like anti spam

Avoma 2022-08-07T12:52:38Z

Can confirm in 1.19.2.

[Mod] Jingy 2024-01-01T21:36:27Z

Can confirm in 1.20.4. I'd like to request ownership of this issue, as @unknown has been inactive since 2015.