Solved [NMS] Custom Skeleton, Crashing Client

Hey guys, I've been getting into custom mobs and have hit a brick wall and I'm not sure how to proceed or what I'm doing wrong.

Currently I'm at the point to where the creature event fires to spawn the custom mob, and it crashes clients connected. Giving a single line error

"client lost connection: Internal Exception: java.io.IOException: an existing connection was forcibly closed by the remote host"

SpawnerSkeleton.class

Code:java

 
public class SpawnerSkeleton extends EntitySkeleton {
 
    public SpawnerSkeleton(World world) {
        super(world);
 
 
        try {
            Field bField = PathfinderGoalSelector.class.getDeclaredField("b");
            bField.setAccessible(true);
            Field cField = PathfinderGoalSelector.class.getDeclaredField("c");
            cField.setAccessible(true);
            bField.set(goalSelector, new UnsafeList<PathfinderGoalSelector>());
            bField.set(targetSelector, new UnsafeList<PathfinderGoalSelector>());
            cField.set(goalSelector, new UnsafeList<PathfinderGoalSelector>());
            cField.set(targetSelector, new UnsafeList<PathfinderGoalSelector>());
        } catch (Exception exc) {
            exc.printStackTrace();
        }
        //this.goalSelector.a(2, new PathfinderGoalMeleeAttack(this, EntityHuman.class, 1.0D, false));
        //this.goalSelector.a(8, new PathfinderGoalLookAtPlayer(this, EntityHuman.class, 8.0F));
        //this.goalSelector.a(8, new PathfinderGoalRandomLookaround(this));
        //this.targetSelector.a(1, new PathfinderGoalHurtByTarget(this, true));
        //this.targetSelector.a(2, new PathfinderGoalNearestAttackableTarget(this, EntityHuman.class, 0, true));
 
    }
 
    @Override
    protected void aD() {
        super.aD();
    }
}

Codesnippet in Listener(Error points within this code block)

Code:java

 
    public void onEntitySpawn(CreatureSpawnEvent event){
        Entity entity = event.getEntity();
        if(event.getSpawnReason().equals(SpawnReason.CUSTOM)){
            Location location = event.getLocation();
            World world = location.getWorld();
 
            net.minecraft.server.v1_7_R1.World mcWorld = ((CraftWorld) world).getHandle();
            net.minecraft.server.v1_7_R1.Entity mcEntity = (((CraftEntity) entity).getHandle());
            if(event.getEntity() instanceof Skeleton){
                SpawnerSkeleton ss = new SpawnerSkeleton(mcWorld);
 
                Location loc = event.getLocation();
                double x = loc.getX();
                double y = loc.getY();
                double z = loc.getZ();
                mcWorld.removeEntity((net.minecraft.server.v1_7_R1.EntitySkeleton) mcEntity);
                mcWorld.addEntity(ss, SpawnReason.REINFORCEMENTS);
                entity = (Entity) ss.getBukkitEntity();
                ss.setPosition(x, y, z);
            }
        }
  }
}

 

If I remember correctly I'm allowed a bump every 24 hours... so bump!

Please help =)

 

If I remember correctly You are allowed to add debug messages to your code and allowed to provide code with matching line numbers.

 

Lorinthio
So you added the entity to the world...great! But where do you want it to be?
you have to use the .setPosition method which you would then pass in the X, Y, and Z coordinates as the parameters.

Thus, you would have to add this line of code:

Code:java

ss.setPosition(x, y, z);

 

Ah yeah, im not sure why thats not in there. I had that line in there before but, it was still producing the same result. But ill put it in and try, thanks for replying!

 

Or at least post the full stack trace.

 

Alright I got that put in and updated my post to the new problem I'm having, the mob spawn event is crashing clients connected with the error

"client lost connection: Internal Exception: java.io.IOException: an existing connection was forcibly closed by the remote host"

thats all the console gives me


The client gives this stack

Code:

java.lang.NullPointerException: Unexpected error
    at net.minecraft.client.network.NetHandlerPlayClient.func_147281_a(NetHandlerPlayClient.java:766)
    at net.minecraft.network.play.server.S0FPacketSpawnMob.func_148833_a(SourceFile:97)
    at net.minecraft.network.play.server.S0FPacketSpawnMob.func_148833_a(SourceFile:15)
    at net.minecraft.network.NetworkManager.func_74428_b(NetworkManager.java:211)
    at net.minecraft.client.multiplayer.PlayerControllerMP.func_78765_e(PlayerControllerMP.java:294)
    at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1587)
    at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:953)
    at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:870)
    at net.minecraft.client.main.Main.main(SourceFile:103)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at net.minecraft.launchwrapper.Launch.launch(Launch.java:134)
    at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

 

Lorinthio
You locations must be null? Post the section of the code where you are spawning the entity.

 

Thats in the second code block. The location, x, y, z are getting the location from the event and using those for spawning it in

 

The entity is registered, right?

 

Correct, its registered in the enable method

Using the following tutorial, is how ive set it up.

https://forums.bukkit.org/threads/nms-tutorial-how-to-override-default-minecraft-mobs.216788/

 

I followed the same tutorial and I have the same problem, MC client also crashes when I use /reload command.

 

Ok cool im not alone. I thought i was crazy for the past week

Alright I have fixed the problem with spawning them. Now the problem I have, is that the mobs are invisible until I relog, is this a fixable problem? Also, I'm getting the following warning...

Code:

[00:11:58] [Server thread/WARN]: Wrong location for SpawnerSkeleton['[Lvl.2] Skeleton'/7490, l='world', x=3.00, y=71.00, z=-5.00] in world 'world'!
[00:11:58] [Server thread/WARN]: Entity is at 3.0,-5.0 (chunk 0,-1) but was stored in chunk 0,0

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I don't know if it's relevant and I'm too tired to actually check, but perhaps you could try setting the position before adding it to the world.

 

I'll try it now thanks

YES! Thank you so much! That was all it took. Now it works perfect! Marking as solved!

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

I can't really say I expected that, but alright.