[1.7.10][Solved] "Crash" (Something with IMessage onMessage and heldItem)[

[Stefinus321]

So it works fine without the heldItem part, but when i add that, it "crashes" (it shuts down and returns to the main menu).

 

The Message class (don't mind the "value")

 

 

package com.stefinus.Main.network;

 

import java.util.Random;

 

import com.stefinus.Main.SMainRegistry;

 

import net.minecraft.entity.passive.EntityCow;

import net.minecraft.entity.player.EntityPlayer;

import net.minecraft.entity.projectile.EntitySnowball;

import net.minecraft.item.ItemStack;

import net.minecraft.util.ChatComponentText;

import net.minecraft.world.World;

import cpw.mods.fml.common.network.simpleimpl.*;

import io.netty.buffer.ByteBuf;

 

public class ShootMessage implements IMessage {

 

 

private int value;

 

/**

    * This is needed for netty to decode the message

    * because the message is not created via a custom

    * constructor but via new {Message}.fromBytes(buf)

    */

    public ShootMessage()

    {

    this.value = new Random().nextInt();

    }

   

    /**

    * This is to read your bytes when receiving the packet.

    */

    @Override

    public void fromBytes(ByteBuf buf)

    {

    this.value = buf.readInt();

    }

 

    /**

    * This is to write your bytes when sending the packet.

    */

    @Override

    public void toBytes(ByteBuf buf)

    {

    buf.writeInt(this.value);

    }

 

    /**

    * This is the handler for the class, allowing access to all

    * the functions and variables.

    */

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

        /**

        * This gets called when the packet is read and received.

        */

        @Override

        public IMessage onMessage(ShootMessage message, MessageContext ctx)

        {

       

        EntityPlayer player = ctx.getServerHandler().playerEntity;

        World world = player.worldObj;

        EntitySnowball ball = new EntitySnowball(world, player);

        ItemStack heldItem = player.getHeldItem();

       

        if(!world.isRemote && heldItem.getItem() == SMainRegistry.P90)

        {

        ctx.getServerHandler().playerEntity.worldObj.spawnEntityInWorld(ball);

        }

       

            return null;

        }

    }

}

 

 

 

The "crash" in the console.

 

 

[16:11:40] [server thread/INFO]: Player265 joined the game

[16:11:40] [Client thread/INFO] [FML]: [Client thread] Client side modded connection established

[16:11:41] [server thread/ERROR] [FML]: SimpleChannelHandlerWrapper exception

java.lang.NullPointerException

at com.stefinus.Main.network.ShootMessage$Handler.onMessage(ShootMessage.java:66) ~[shootMessage$Handler.class:?]

at com.stefinus.Main.network.ShootMessage$Handler.onMessage(ShootMessage.java:1) ~[shootMessage$Handler.class:?]

at cpw.mods.fml.common.network.simpleimpl.SimpleChannelHandlerWrapper.channelRead0(SimpleChannelHandlerWrapper.java:37) ~[simpleChannelHandlerWrapper.class:?]

at cpw.mods.fml.common.network.simpleimpl.SimpleChannelHandlerWrapper.channelRead0(SimpleChannelHandlerWrapper.java:17) ~[simpleChannelHandlerWrapper.class:?]

at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[simpleChannelInboundHandler.class:?]

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]

at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) [MessageToMessageDecoder.class:?]

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

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) [DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) [DefaultChannelHandlerContext.class:?]

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

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

at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:86) [FMLProxyPacket.class:?]

at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241) [NetworkManager.class:?]

at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:182) [NetworkSystem.class:?]

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:726) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:614) [MinecraftServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118) [integratedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:485) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:752) [MinecraftServer$2.class:?]

[16:11:41] [server thread/ERROR] [FML]: There was a critical exception handling a packet on channel stefinusguns

java.lang.NullPointerException

at com.stefinus.Main.network.ShootMessage$Handler.onMessage(ShootMessage.java:66) ~[shootMessage$Handler.class:?]

at com.stefinus.Main.network.ShootMessage$Handler.onMessage(ShootMessage.java:1) ~[shootMessage$Handler.class:?]

at cpw.mods.fml.common.network.simpleimpl.SimpleChannelHandlerWrapper.channelRead0(SimpleChannelHandlerWrapper.java:37) ~[simpleChannelHandlerWrapper.class:?]

at cpw.mods.fml.common.network.simpleimpl.SimpleChannelHandlerWrapper.channelRead0(SimpleChannelHandlerWrapper.java:17) ~[simpleChannelHandlerWrapper.class:?]

at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:98) ~[simpleChannelInboundHandler.class:?]

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]

at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103) ~[MessageToMessageDecoder.class:?]

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

at io.netty.channel.DefaultChannelHandlerContext.invokeChannelRead(DefaultChannelHandlerContext.java:337) ~[DefaultChannelHandlerContext.class:?]

at io.netty.channel.DefaultChannelHandlerContext.fireChannelRead(DefaultChannelHandlerContext.java:323) ~[DefaultChannelHandlerContext.class:?]

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

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

at cpw.mods.fml.common.network.internal.FMLProxyPacket.processPacket(FMLProxyPacket.java:86) [FMLProxyPacket.class:?]

at net.minecraft.network.NetworkManager.processReceivedPackets(NetworkManager.java:241) [NetworkManager.class:?]

at net.minecraft.network.NetworkSystem.networkTick(NetworkSystem.java:182) [NetworkSystem.class:?]

at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:726) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:614) [MinecraftServer.class:?]

at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:118) [integratedServer.class:?]

at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:485) [MinecraftServer.class:?]

at net.minecraft.server.MinecraftServer$2.run(MinecraftServer.java:752) [MinecraftServer$2.class:?]

[16:11:41] [server thread/INFO]: Player265 lost connection: TextComponent{text='A fatal error has occured, this connection is terminated', siblings=[], style=Style{hasParent=false, color=null, bold=null, italic=null, underlined=null, obfuscated=null, clickEvent=null, hoverEvent=null}}

[16:11:41] [server thread/INFO]: Player265 left the game

[16:11:41] [server thread/INFO]: Stopping singleplayer server as player logged out

[16:11:41] [server thread/INFO]: Stopping server

[16:11:41] [server thread/INFO]: Saving players

[16:11:41] [server thread/INFO]: Saving worlds