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[SOLVED]Client-Side packet handler not receiving packet with dedicated server.


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Hi There

Im currently sending packets from a tile entity to all nearby clients to play sounds(This is necessary over traditional playSound methods due to high control over the sound). On a single player world, everything works as expected and the debug printouts within the code come from the expected sides. When running on a dedicated server, the packet constructor and toBytes() are both called with correct data but nothing happens following that. No code within the Packet Handler is executed and neither is fromBytes().




import io.netty.buffer.ByteBuf;
import net.minecraft.util.math.BlockPos;
import net.minecraftforge.fml.common.network.simpleimpl.IMessage;

public class PacketPlaySoundOnClient implements IMessage{

	public BlockPos pos;
	public int slot;	
	public int instruction;

	public PacketPlaySoundOnClient(BlockPos pos, int slot, int instruction) {
		this.pos = pos;
		this.slot = slot;
		this.instruction = instruction;
		System.out.println("Constructing Packet");

	public PacketPlaySoundOnClient() {}
	public void fromBytes(ByteBuf buf) {
		pos = BlockPos.fromLong(buf.readLong());
		slot = buf.readInt();
		instruction = buf.readInt();	
		System.out.println("From Bytes Pos = " + pos + ", Slot = " + slot);

	public void toBytes(ByteBuf buf) {
		System.out.println("To Bytes Pos = " + pos + ", Slot = " + slot);







package net.themcjavafre4k.mcdj.networking;

import java.util.ArrayList;
import java.util.List;

import net.minecraft.client.Minecraft;
import net.minecraft.item.ItemStack;
import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
import net.themcjavafre4k.mcdj.SoundHandler;
import net.themcjavafre4k.mcdj.item.ItemCustomRecord;
import net.themcjavafre4k.mcdj.item.MCDJItems;
import net.themcjavafre4k.mcdj.sound.SoundDJDeck;
import net.themcjavafre4k.mcdj.tileentity.TileEntityDJDeck;

public class ClientSoundHandler implements IMessageHandler<PacketPlaySoundOnClient, IMessage> {

	private List<SoundDJDeck> slot1 = new ArrayList<SoundDJDeck>();

	public IMessage onMessage(PacketPlaySoundOnClient msg, MessageContext ctx) {

		if(ctx.side != Side.CLIENT) {

			System.err.println("Recieved on Server Side");
			return null;

		System.out.println("Packet recieved");

		Minecraft.getMinecraft().addScheduledTask(() -> {

			TileEntityDJDeck tile = (TileEntityDJDeck) Minecraft.getMinecraft().world.getTileEntity(msg.pos);


			ItemStack records = tile.inventory.getStackInSlot(0);
			ItemCustomRecord slot1Record = (ItemCustomRecord)records.getItem();

				switch(msg.slot) {
				case 0:
					System.out.println("Playing Sound In Slot 1");

					slot1.add(new SoundDJDeck(msg.pos, SoundHandler.getRecordSound(MCDJItems.customRecord.indexOf(tile.inventory.getStackInSlot(0).getItem())), 0));			


		return null;




Registering packet in my ClientProxy(Only packet with id 11):

MCDJMod.network.registerMessage(ClientSoundHandler.class, PacketPlaySoundOnClient.class, 11, Side.CLIENT);



Calling send method:


System.out.print("Play Method Called \n");

		if(!world.isRemote) {

			MCDJMod.network.sendToAllAround(new PacketPlaySoundOnClient(pos, slot, 0), new NetworkRegistry.TargetPoint(world.provider.getDimension(), pos.getX(), pos.getY(), pos.getZ(), 20)); 




On a side not, If i leave out the instruction integer from my packet, I get the following IndexOutOfBoundException from the client followed by disconnection from the server:

readerIndex(11) + length(2) exceeds writerIndex(12): UnpooledSlicedByteBuf(ridx: 11, widx: 12, cap: 12/12, unwrapped: PooledUnsafeDirectByteBuf(ridx: 0, widx: 13, cap: 13))


Not sure if this may have something to do with the issue.

Edited by TheMCJavaFre4k
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