CorruptedFrameException on 1.20.3 protocol

[Emibergo02]

• The FAQ doesn't contain a resolution to my issue

Versions

• mineflayer: latest
• server: velocity 1.20.4
• bun: 1.1.8

Detailed description of a problem

Malformed protocol for ClientSettingsPacket

What did you try yet?

Join the client on Velocity proxy

##Error on Velocity

[18:25:33 ERROR]: [connected player] bot4 (/2.42.7.131:59082): exception encountered in com.velocitypowered.proxy.connection.client.ClientConfigSessionHandler@8981fc
io.netty.handler.codec.CorruptedFrameException: Error decoding class com.velocitypowered.proxy.protocol.packet.ClientSettingsPacket Direction SERVERBOUND Protocol 1.20.3 State CONFIG ID 0
        at com.velocitypowered.proxy.protocol.netty.MinecraftDecoder.handleDecodeFailure(MinecraftDecoder.java:131) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at com.velocitypowered.proxy.protocol.netty.MinecraftDecoder.tryDecode(MinecraftDecoder.java:86) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at com.velocitypowered.proxy.protocol.netty.MinecraftDecoder.channelRead(MinecraftDecoder.java:61) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:442) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:346) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:318) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:509) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:407) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]
Caused by: io.netty.handler.codec.CorruptedFrameException: Bad VarInt decoded
        at com.velocitypowered.proxy.protocol.ProtocolUtils.readVarInt(ProtocolUtils.java:132) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at com.velocitypowered.proxy.protocol.ProtocolUtils.readString(ProtocolUtils.java:236) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at com.velocitypowered.proxy.protocol.packet.ClientSettingsPacket.decode(ClientSettingsPacket.java:131) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        at com.velocitypowered.proxy.protocol.netty.MinecraftDecoder.tryDecode(MinecraftDecoder.java:84) ~[velocity.jar:3.3.0-SNAPSHOT (git-1228f147-b389)]
        ... 28 more

[extremeheat]

Can you reproduce on a vanilla server? This is odd as we don't get the error on CI.

[Emibergo02]

yes

[extremeheat]

Please provide code to reproduce on vanilla 1.20.3

[Emibergo02]

const {createBot} = require('mineflayer');


let bot = createBot({
    host: 'hidden',
    port: 25565,
    username: 'gglglgll',
    viewDistance: 'tiny',
    keepAlive: true,
    version: '1.20.4',
    checkTimeoutInterval: 30000,
});

bot.on("end", (reason) => {
    console.log("Bot " + bot.username + " ended for " + reason)
});

bot.on('messagestr', (msg,position,json) => {
    console.log("Message: " + msg);
});
bot.on('kicked', (reason, loggedIn) => {
    console.log("Bot " + bot.username + " kicked for " + JSON.stringify(reason) + " loggedIn: " + loggedIn);
});

bot.on('resourcePack', (url, uuid) => {
    bot.acceptResourcePack();
});
bot.on("error", (err) => {

    throw err;
});

As simple as that

[ryanalexander]

This issue seems to still be present in 4.26.0.

It looks like this issue may have been incorrectly left in "waiting info from op"