Internal Exception: no class def found

Question

Internal Exception: no class def found

MineGame159 opened this issue 4 years ago · 5 comments

MineGame159 commented 4 years ago

I get this whenever I try to join my 1.14.4 server but not when joining other servers. Appareantly the class is Packet. The server has viaversion and when i try to join without multiconnect it works.

MineGame159 · Answer 1 · 2020-09-14T09:51:56.000Z

[11:51:13] [Netty Client IO #1/ERROR]: Unexpectedly disconnected from server!
java.lang.NoClassDefFoundError: net/minecraft/class_2596
	at net.minecraft.network.packet.s2c.play.BlockEntityUpdateS2CPacket.handler$zlc000$onRead(BlockEntityUpdateS2CPacket.java:542) ~[minecraft-1.16.3-projectmapped-net.fabricmc.yarn-1.16.3+build.7-v2.jar:?]
	at net.minecraft.network.packet.s2c.play.BlockEntityUpdateS2CPacket.read(BlockEntityUpdateS2CPacket.java:30) ~[minecraft-1.16.3-projectmapped-net.fabricmc.yarn-1.16.3+build.7-v2.jar:?]
	at net.minecraft.network.DecoderHandler.decode(DecoderHandler.java:30) ~[minecraft-1.16.3-projectmapped-net.fabricmc.yarn-1.16.3+build.7-v2.jar:?]
	at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:489) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:428) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265) ~[netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:297) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:413) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:286) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:647) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:582) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:499) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:461) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884) [netty-all-4.1.25.Final.jar:4.1.25.Final]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_201]
Caused by: java.lang.ClassNotFoundException: net.minecraft.class_2596
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[?:1.8.0_201]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424) ~[?:1.8.0_201]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) ~[?:1.8.0_201]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_201]
	at net.fabricmc.loader.launch.knot.KnotClassLoader.loadClass(KnotClassLoader.java:166) ~[[email protected]_16_3.1.16.3+build.7-v2.jar:?]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357) ~[?:1.8.0_201]
	... 40 more

Earthcomputer · Answer 2 · 2020-09-14T16:34:12.000Z

... what are you doing? Why are you in a deobfuscated environment?

MineGame159 · Answer 3 · 2020-09-14T16:37:35.000Z

Because im developing my own fabric mod and i want to use multiconnect with it

Earthcomputer · Answer 4 · 2020-09-14T16:38:13.000Z

Have you even read the readme?

MineGame159 · Answer 5 · 2020-09-14T16:40:21.000Z

Oh I propably need the :slim project for it work in IDE, yeah sorry for that, I thought its only needed if I want to run it alongside of my mod and its not needed when i include it in my mod

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