Friends server DC'ing players when they click in inventory

[drigis]

For background a friend of kine is trying to put together A custom 1.12 modded minecraft pack and server for our little group of friends to use.

 

Sadly I can't provide much more than the logs he sent over but hoping somebody here wit experience making their own modpack server or just dealing with similar issues may be able to make sense of this. In my experience helping test I was able to connect to the server but soon as I clicked anything, even black spaces in the inv I immediately was disconnected for the server. Most recent change (post all this happening) was adding random patches thinking that maybe it was a packet size issue but the issue still seems to be happening.

 

[19:26:19] [Netty Epoll Server IO #3/ERROR] [FML]: NetworkDispatcher exception
io.netty.handler.codec.DecoderException: java.io.IOException: Packet 0/7 (CPacketClickWindow) was larger than I expected, found 1 bytes extra whilst reading packet 7
        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:442) ~[minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248) ~[minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.timeout.IdleStateHandler.channelRead(IdleStateHandler.java:287) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:1017) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:394) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:299) [minecraft_server.1.12.2.jar:?]
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [minecraft_server.1.12.2.jar:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_241]
Caused by: java.io.IOException: Packet 0/7 (CPacketClickWindow) was larger than I expected, found 1 bytes extra whilst reading packet 7
        at net.minecraft.network.NettyPacketDecoder.decode(SourceFile:42) ~[gz.class:?]
        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:411) ~[minecraft_server.1.12.2.jar:?]
        ... 31 more
[19:26:19] [Netty Epoll Server IO #3/ERROR] [FML]: NetworkDispatcher exception
io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(14) + length(1) exceeds writerIndex(14): PooledUnsafeDirectByteBuf(ridx: 14, widx: 14, cap: 14)
        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:442) ~[minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:375) ~[minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:342) ~[minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:325) ~[minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:360) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:325) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:360) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:325) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:75) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.ChannelInboundHandlerAdapter.channelInactive(ChannelInboundHandlerAdapter.java:75) [minecraft_server.1.12.2.jar:?]
        at io.netty.handler.timeout.IdleStateHandler.channelInactive(IdleStateHandler.java:278) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:224) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelInactive(DefaultChannelPipeline.java:1329) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:245) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:231) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:908) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:744) [minecraft_server.1.12.2.jar:?]
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:163) [minecraft_server.1.12.2.jar:?]
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:403) [minecraft_server.1.12.2.jar:?]
        at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:304) [minecraft_server.1.12.2.jar:?]
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [minecraft_server.1.12.2.jar:?]
        at java.lang.Thread.run(Unknown Source) [?:1.8.0_241]
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(14) + length(1) exceeds writerIndex(14): PooledUnsafeDirectByteBuf(ridx: 14, widx: 14, cap: 14)
        at io.netty.buffer.AbstractByteBuf.checkReadableBytes0(AbstractByteBuf.java:1396) ~[minecraft_server.1.12.2.jar:?]
        at io.netty.buffer.AbstractByteBuf.readByte(AbstractByteBuf.java:687) ~[minecraft_server.1.12.2.jar:?]
        at net.minecraft.network.PacketBuffer.readByte(PacketBuffer.java:864) ~[gy.class:?]
        at net.minecraft.network.PacketBuffer.func_150792_a(PacketBuffer.java:201) ~[gy.class:?]
        at net.minecraft.network.play.client.CPacketConfirmTeleport.func_148837_a(SourceFile:21) ~[ky.class:?]
        at net.minecraft.network.NettyPacketDecoder.decode(SourceFile:40) ~[gz.class:?]
        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:411) ~[minecraft_server.1.12.2.jar:?]
 

Edited April 1, 2020 by drigis

[Ugdhar]

1.12 is no longer supported on these forums due to age.

Please update to a modern version to receive support.

 

More information on supported versions can be found in the LTS link at the top of every page.