[1.7.10] [SOLVED] Packets: Undefined message for descriminator 1 in channel

Athire · March 22, 2015

Hello all! Sorry to bother you again so soon, but I've spent quite a while going through the debugger and I'm about out of ideas. I'm still trying to get a feel for how packets are done in 1.7, and one of them is giving me an issue. Whenever I try to log in to a world, the game crashes due to a null pointer, saying "Undefined message for descriminator 1 in propsChannel", which is the channel I use to sync my extended player properties. I believe it is in the packet class itself, because that was the last thing I canged before I got the issue. However the crash report cuts out before pointing me to a line of my code, so it's possible that when I fixed something in my packet class it allowed for a new error elsewhere.

Thank you guys in advance. You are always incredibly helpful!

Here is my packet class.

public class propsPacket implements IMessage

{

public int id1,id2,id3,id4,maxMana, currentMana;

public boolean isMage, isHoly, isUnholy, iceTouch;

mageSpellList m= new mageSpellList();

unholySpellList n= new unholySpellList();

holySpellList p=new holySpellList();

public int[] mageIDs =new int[m.listOfSpells.length];

public int[] necroIDs =new int[n.listOfSpells.length];

public int[] holyIDs =new int[p.listOfSpells.length];

public propsPacket() { }

public propsPacket(int maxM, int curM, int idA,int idB, int idC, int idD, boolean mage, boolean nec, boolean pal, boolean ice, int[] mID, int[] nID, int[] hID) {

//mana amount

this.maxMana=maxM;

this.currentMana=curM;

//active spell id's

this.id1=idA;

this.id2=idB;

this.id3=idC;

this.id4=idD;

//class booleans

this.isMage=mage;

this.isUnholy=nec;

this.isHoly=pal;

//spell booleans

this.iceTouch=ice;

//spell id's

this.mageIDs=mID;

this.necroIDs=nID;

this.holyIDs=hID;

}

@Override

public void toBytes(ByteBuf buf) {

buf.writeInt(this.maxMana);

buf.writeInt(this.currentMana);

buf.writeInt(id1);

buf.writeInt(id2);

buf.writeInt(id3);

buf.writeInt(id4);

buf.writeBoolean(this.isMage);

buf.writeBoolean(this.isUnholy);

buf.writeBoolean(this.isHoly);

buf.writeBoolean(this.iceTouch);

for(int i=0; i<m.listOfSpells.length; i++)

{

buf.writeInt(this.mageIDs);

}

for(int i=0; i<n.listOfSpells.length; i++)

{

buf.writeInt(this.necroIDs);

}

for(int i=0; i<p.listOfSpells.length; i++)

{

buf.writeInt(this.holyIDs);

}

@Override

public void fromBytes(ByteBuf buf) {

this.maxMana=buf.readInt();

this.currentMana=buf.readInt();

this.id1=buf.readInt();

this.id2=buf.readInt();

this.id3=buf.readInt();

this.id4=buf.readInt();

//booleans

this.isMage=buf.readBoolean();

this.isUnholy=buf.readBoolean();

this.isHoly=buf.readBoolean();

this.iceTouch=buf.readBoolean();

//arrays

for(int i=0; i<m.listOfSpells.length; i++)

{

this.mageIDs=buf.readInt();

}

for(int i=0; i<n.listOfSpells.length; i++)

{

this.necroIDs=buf.readInt();

}

for(int i=0; i<p.listOfSpells.length; i++)

{

this.holyIDs=buf.readInt();

}

handler:

public class propsPacketHandler implements IMessageHandler <propsPacket, IMessage>

{

@Override

public IMessage onMessage(propsPacket message, MessageContext ctx) {

handleExtendedProperties(message, ctx);

return null;

}

private void handleExtendedProperties(propsPacket message, MessageContext ctx)

{

EntityPlayer player=BaseClass.proxy.getPlayerEntity(ctx);

magicPlayer props = magicPlayer.get((EntityPlayer) player);

int idNum;

//sync mana

props.setMaxMana(message.maxMana);

props.setCurrentMana(message.currentMana);

//sync spell List

boolean hasLearned=false;

for(int i=0; i<props.mageList.listOfSpells.length; i++)

{

idNum= message.mageIDs;

hasLearned= props.mageList.checkIfSpellKnown(idNum);

if(!hasLearned)

{

spell s= props.mageList.getSpellFromID(idNum);

props.mageList.addSpellToList(s);

}

for(int i=0; i<props.necroList.listOfSpells.length; i++)

{

idNum= message.necroIDs;

hasLearned= props.necroList.checkIfSpellKnown(idNum);

if(!hasLearned)

{

spell s= props.necroList.getSpellFromID(idNum);

props.necroList.addSpellToList(s);

}

for(int i=0; i<props.holyList.listOfSpells.length; i++)

{

idNum= message.holyIDs;

hasLearned= props.holyList.checkIfSpellKnown(idNum);

if(!hasLearned)

{

spell s= props.holyList.getSpellFromID(idNum);

props.holyList.addSpellToList(s);

}

//sync active IDs

props.setActiveSpellID(message.id1, 1);

props.setActiveSpellID(message.id2, 2);

props.setActiveSpellID(message.id3, 3);

props.setActiveSpellID(message.id4, 4);

//sync isMage

props.isMage= message.isMage;

props.isUnholy= message.isUnholy;

props.isHoly=message.isHoly;

props.necroList.iceTouch= message.iceTouch;

}

Registration:

propsChannel= NetworkRegistry.INSTANCE.newSimpleChannel("propsChannel");

propsChannel.registerMessage(propsPacketHandler.class, propsPacket.class, 1, Side.SERVER);

Here is the crash report:

io.netty.handler.codec.DecoderException: java.lang.NullPointerException: Undefined message for discriminator 1 in channel propsChannel

at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:99) ~[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:247) [NetworkManager.class:?]

at net.minecraft.client.Minecraft.runTick(Minecraft.java:2151) [Minecraft.class:?]

at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:1038) [Minecraft.class:?]

at net.minecraft.client.Minecraft.run(Minecraft.java:961) [Minecraft.class:?]

at net.minecraft.client.main.Main.main(Main.java:164) [Main.class:?]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_45]

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_45]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_45]

at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_45]

at net.minecraft.launchwrapper.Launch.launch(Launch.java:134) [launchwrapper-1.9.jar:?]

at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

at net.minecraftforge.gradle.GradleStartCommon.launch(GradleStartCommon.java:85) [start/:?]

at GradleStart.main(GradleStart.java:45) [start/:?]

Caused by: java.lang.NullPointerException: Undefined message for discriminator 1 in channel propsChannel

at cpw.mods.fml.common.network.FMLIndexedMessageToMessageCodec.decode(FMLIndexedMessageToMessageCodec.java:73) ~[FMLIndexedMessageToMessageCodec.class:?]

at cpw.mods.fml.common.network.FMLIndexedMessageToMessageCodec.decode(FMLIndexedMessageToMessageCodec.java:17) ~[FMLIndexedMessageToMessageCodec.class:?]

at io.netty.handler.codec.MessageToMessageCodec$2.decode(MessageToMessageCodec.java:81) ~[MessageToMessageCodec$2.class:?]

at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89) ~[MessageToMessageDecoder.class:?]

... 19 more

[19:14:10] [Client thread/ERROR] [FML]: SimpleChannelHandlerWrapper exception