Cannot get ID for packet class net.md_5.bungee.protocol.packet.PlayerListItemRemove in phase CONFIGURATION with direction TO_CLIENT

[Techirion]

Bungeecord version

git:BungeeCord-Bootstrap:1.20-R0.3-SNAPSHOT:ee02d98:unknown by md_5

Server version

Latest Paper

Client version

Unsure

Bungeecord plugins

One custom plugin, NuVotifier, TcpShield

The bug

Seeing this randomly in console, not sure how to replicate or what causes it..

19:10:57 [SEVERE] [Redacted] -> UpstreamBridge - encountered exception
io.netty.handler.codec.EncoderException: java.lang.IllegalArgumentException: Cannot get ID for packet class net.md_5.bungee.protocol.packet.PlayerListItemRemove in phase CONFIGURATION with direction TO_CLIENT
    at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:125)
    at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:893)
    at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:956)
    at io.netty.channel.AbstractChannelHandlerContext$WriteTask.run(AbstractChannelHandlerContext.java:1263)
    at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
    at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
    at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
    at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:405)
    at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
    at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
    at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.lang.IllegalArgumentException: Cannot get ID for packet class net.md_5.bungee.protocol.packet.PlayerListItemRemove in phase CONFIGURATION with direction TO_CLIENT
    at com.google.common.base.Preconditions.checkArgument(Preconditions.java:463)
    at net.md_5.bungee.protocol.Protocol$DirectionData.getId(Protocol.java:937)
    at net.md_5.bungee.protocol.MinecraftEncoder.encode(MinecraftEncoder.java:26)
    at net.md_5.bungee.protocol.MinecraftEncoder.encode(MinecraftEncoder.java:10)
    at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107)
    ... 10 more

Log output (links)

No response

Checking

• I am using BungeeCord and not a fork. Issues with forks should not be reported here.
• I think this is not an issue with a bungeecord plugin.
• I have not read these checkboxes and therefore I just ticked them all.
• This is not a question or plugin creation help request.

[Techirion]

I've already removed all code related to Tab List on bungee (I'm sending Tab list header and footer with spigot plugin) but that didn't help.

[Outfluencer]

at what time is this happening?
On server switch or something like that?

[Outfluencer]

Log output needed

[Techirion]

I think it's when players are switching servers...

18:15:31 [INFO] [Username] <-> ServerConnector [slimefun] has connected
18:15:31 [INFO] [Username] <-> DownstreamBridge <-> [lobby] has disconnected
...
18:16:29 [INFO] [Username] <-> ServerConnector [lobby] has connected
18:16:29 [INFO] [Username] <-> DownstreamBridge <-> [slimefun] has disconnected
...
18:16:45 [SEVERE] [Username] -> UpstreamBridge - encountered exception
io.netty.handler.codec.EncoderException: java.lang.IllegalArgumentException: Cannot get ID for packet class net.md_5.bungee.protocol.packet.PlayerListItemRemove in phase CONFIGURATION with direction TO_CLIENT
	at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:125)
	at io.netty.channel.AbstractChannelHandlerContext.invokeWrite0(AbstractChannelHandlerContext.java:893)
	at io.netty.channel.AbstractChannelHandlerContext.invokeWriteAndFlush(AbstractChannelHandlerContext.java:956)
	at io.netty.channel.AbstractChannelHandlerContext$WriteTask.run(AbstractChannelHandlerContext.java:1263)
	at io.netty.util.concurrent.AbstractEventExecutor.runTask(AbstractEventExecutor.java:173)
	at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:166)
	at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:470)
	at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:405)
	at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997)
	at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
	at java.base/java.lang.Thread.run(Thread.java:1583)
Caused by: java.lang.IllegalArgumentException: Cannot get ID for packet class net.md_5.bungee.protocol.packet.PlayerListItemRemove in phase CONFIGURATION with direction TO_CLIENT
	at com.google.common.base.Preconditions.checkArgument(Preconditions.java:463)
	at net.md_5.bungee.protocol.Protocol$DirectionData.getId(Protocol.java:937)
	at net.md_5.bungee.protocol.MinecraftEncoder.encode(MinecraftEncoder.java:26)
	at net.md_5.bungee.protocol.MinecraftEncoder.encode(MinecraftEncoder.java:10)
	at io.netty.handler.codec.MessageToByteEncoder.write(MessageToByteEncoder.java:107)
	... 10 more
18:16:45 [INFO] [Username] disconnected with: §f§fEncoderException : java.lang.IllegalArgumentException: Cannot get ID for packet class net.md_5.bungee.protocol.packet.PlayerListItemRemove in phase CONFIGURATION with direction TO_CLIENT @ io.netty.handler.codec.MessageToByteEncoder:125
18:16:45 [INFO] [Username] -> UpstreamBridge has disconnected
18:16:45 [INFO] [Username] <-> DownstreamBridge <-> [lobby] has disconnected
18:16:47 [INFO] [Username,/1.1.1.1:22326] <-> InitialHandler has connected
18:16:48 [INFO] [Username] <-> ServerConnector [lobby] has connected
...
18:16:56 [INFO] [Username] <-> ServerConnector [skygrid] has connected
18:16:56 [INFO] [Username] <-> DownstreamBridge <-> [lobby] has disconnected

[Outfluencer]

Have you removed all plugin from bungee while testing

[Techirion]

Can't replicate on testing with or without plugins, can't really test on prod, from what I saw most of not all players used 1.20.3/1.20.4 and were very laggy, 800ms, 1000ms pings, Not sure if that's related somehow...

[Techirion]

I also went and checked old logs and I can find this occurring since March 2024 (don't have older logs)

[topbars]

I also discovered this problem myself. After updating to the latest version of BungeeKord, players who connect with versions 1.20.5 and 1.20.6 kick when trying to connect. Have you solved this problem?

[Techirion]

No, we've ended up migrating away from BungeeCord to Velocity.

[Yarethf]

What's up, I have bungeecord on my server and when I enter with forge it takes me out, but if I have op it lets me enter normally
Error: encountered exception
java.lang.NullPointerException

[Janmm14]

@Yarethf pls use spigotmc.org forums for support - or maybe you can attempt to find out potential reasons if you look in the console. either way, its wrong to just post your issue under something unrelated.

[jquery-package]

I found a way to replicate this issue. You need to quickly change servers multiple times using plugin like this - https://pastebin.com/cP7CT6r1. I was able to get kicked even on the latest bungee without any plugins, using MC client > 1.20.2.
Could you please check this, @Janmm14 @Outfluencer

[Outfluencer]

i can reproduce

[Outfluencer]

I think that #3746 should fix this, as the startconfig packet is the cause in your case
@jquery-package