I created a Networkchannel, that is working just fine, and a IMessage and its Handler.

I am triing to send an integer over the channel, shorts are working no problem. The message is registered, but if I try to send it I get a strange exception.

 

 

 

[08:38:56] [Netty Local Client IO #0/ERROR] [FML]: There was a critical exception handling a packet on channel TriamChannel

io.netty.handler.codec.DecoderException: java.lang.IllegalArgumentException: Varint length is between 1 and 5, not 16

at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:99) ~[MessageToMessageDecoder.class:4.0.15.Final]

at io.netty.handler.codec.MessageToMessageCodec.channelRead(MessageToMessageCodec.java:111) ~[MessageToMessageCodec.class:4.0.15.Final]

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:338) ~[DefaultChannelHandlerContext.class:4.0.15.Final]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:324) ~[DefaultChannelHandlerContext.class:4.0.15.Final]

at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) ~[DefaultChannelPipeline.class:4.0.15.Final]

at io.netty.channel.embedded.EmbeddedChannel.writeInbound(EmbeddedChannel.java:169) ~[EmbeddedChannel.class:4.0.15.Final]

at net.minecraftforge.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:88) [FMLProxyPacket.class:?]

at net.minecraft.network.NetworkManager.channelRead0(NetworkManager.java:144) [NetworkManager.class:?]

at net.minecraft.network.NetworkManager.channelRead0(NetworkManager.java:469) [NetworkManager.class:?]

at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:103) [simpleChannelInboundHandler.class:4.0.15.Final]

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:338) [DefaultChannelHandlerContext.class:4.0.15.Final]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:324) [DefaultChannelHandlerContext.class:4.0.15.Final]

at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.handleClientSideCustomPacket(NetworkDispatcher.java:363) [NetworkDispatcher.class:?]

at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.channelRead0(NetworkDispatcher.java:230) [NetworkDispatcher.class:?]

at net.minecraftforge.fml.common.network.handshake.NetworkDispatcher.channelRead0(NetworkDispatcher.java:49) [NetworkDispatcher.class:?]

at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:103) [simpleChannelInboundHandler.class:4.0.15.Final]

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:338) [DefaultChannelHandlerContext.class:4.0.15.Final]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:324) [DefaultChannelHandlerContext.class:4.0.15.Final]

at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:785) [DefaultChannelPipeline.class:4.0.15.Final]

at io.netty.channel.local.LocalChannel.finishPeerRead(LocalChannel.java:312) [LocalChannel.class:4.0.15.Final]

at io.netty.channel.local.LocalChannel.access$400(LocalChannel.java:44) [LocalChannel.class:4.0.15.Final]

at io.netty.channel.local.LocalChannel$6.run(LocalChannel.java:298) [LocalChannel$6.class:4.0.15.Final]

at io.netty.channel.local.LocalEventLoop.run(LocalEventLoop.java:33) [LocalEventLoop.class:4.0.15.Final]

at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:101) [singleThreadEventExecutor$2.class:4.0.15.Final]

at java.lang.Thread.run(Unknown Source) [?:1.8.0_45]

 

 

 

 

Message and Handler class

 

public class ActualEnergyMessage implements IMessage{

private int actualEnergy;

public ActualEnergyMessage() {

}

public ActualEnergyMessage(int actualEnergy) {
	this.actualEnergy = actualEnergy;
}

@Override
public void fromBytes(ByteBuf buf) {
	actualEnergy = ByteBufUtils.readVarInt(buf, 16);

}

@Override
public void toBytes(ByteBuf buf) {
	ByteBufUtils.writeVarInt(buf, actualEnergy, 16);

}


public static class Handler implements IMessageHandler<ActualEnergyMessage, IMessage> {

	@Override
	public IMessage onMessage(ActualEnergyMessage message,
			MessageContext ctx) {
		((ExtendedPlayer)(Minecraft.getMinecraft().thePlayer.getExtendedProperties(ExtendedPlayer.EXT_PROP_NAME))).setActualEnergy(message.actualEnergy);
		return null;
	}

}

}

It literally says in the top line...

 

[08:38:56] [Netty Local Client IO #0/ERROR] [FML]: There was a critical exception handling a packet on channel TriamChannel
io.netty.handler.codec.DecoderException: java.lang.IllegalArgumentException: Varint length is between 1 and 5, not 16

I just got it. I was reading bits all the time but it says bytes. Still thank you

Network messages are hard to get right in 1.8 because of multithreading.

 

This guide might help

http://greyminecraftcoder.blogspot.com.au/2015/01/the-client-server-division.html

especially

http://greyminecraftcoder.blogspot.com.au/2015/01/client-server-communication-using-your.html

and

http://greyminecraftcoder.blogspot.com.au/2015/01/thread-safety-with-network-messages.html

 

Also this tutorial project which has a working example of network messages (MBE60)

https://github.com/TheGreyGhost/MinecraftByExample

 

-TGG

 

So. Just so I dont get this wrong.

The important part is that I queue up the processing of the message to the queue from minecraft

  minecraft.addScheduledTask(new Runnable()
    {
      public void run() {
        processMessage(worldClient, message);
      }
    });

Right?