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[1.8] IMessage crashes

Posted April 29, 201510 yr

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;
	}

}

}

Quote

April 29, 201510 yr

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

Former developer for DivineRPG, Pixelmon and now the maker of Essence of the Gods

Quote

April 29, 201510 yr

Author

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

Quote

April 29, 201510 yr

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

Quote

April 29, 201510 yr

Author

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?

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[1.8] IMessage crashes

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