Wither Multi-shot

I'm trying to make the wither shoot multiple witherskulls at once, here's my current code:

Code:

    public void onWitherAttack(ProjectileLaunchEvent event){
        if(event.getEntity() instanceof WitherSkull){
            for (int i = 0; i < 3; i++) {
                WitherSkull e = (WitherSkull) event.getEntity().getWorld().spawnEntity(event.getEntity().getLocation().add(randInt(-1, 1), randInt(-1, 1),randInt(-1, 1)),EntityType.WITHER_SKULL);
                e.setVelocity(event.getEntity().getVelocity());
            }
        }

public int randInt(int min, int max) {

        Random rand = new Random();

        int randomNum = rand.nextInt((max - min) + 1) + min;

        return randomNum;
    }
    }
    

I keep getting this error:

Code:

at net.minecraft.server.v1_8_R2.World.addEntity(World.java:1020) ~[spigot-1.8.3.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.craftbukkit.v1_8_R2.CraftWorld.spawn(CraftWorld.java:1121) ~[spigot-1.8.3.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.craftbukkit.v1_8_R2.CraftWorld.spawn(CraftWorld.java:861) ~[spigot-1.8.3.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.craftbukkit.v1_8_R2.CraftWorld.spawnEntity(CraftWorld.java:377) ~[spigot-1.8.3.jar:git-Spigot-2ec6f06-7722428]
    at me.leothepro555.campaign.Specter.onWitherAttack(Specter.java:135) ~[?:?]
    at sun.reflect.GeneratedMethodAccessor469.invoke(Unknown Source) ~[?:?]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_11]
    at java.lang.reflect.Method.invoke(Method.java:483) ~[?:1.8.0_11]
    at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:301) ~[spigot-1.8.3.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62) ~[spigot-1.8.3.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:502) ~[spigot-1.8.3.jar:git-Spigot-2ec6f06-7722428]
    at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:487) ~[spigot-1.8.3.jar:git-Spigot-2ec6f06-7722428]

Specter.java line 135 is
WitherSkull e = (WitherSkull) event.getEntity().getWorld().spawnEntity(event.getEntity().getLocation().add(randInt(-1, 1), randInt(-1, 1),randInt(-1, 1)),EntityType.WITHER_SKULL);

 

@Hex_27
Try using Wither#launchProjectile(WitherSkull.class)

 

@megamichiel Same error

@megamichiel Okay, i tried other projectiles, and they all work except witherskull

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

 

@Hex_27
What is the full error

 

@megamichiel that is the full error. Just multipied by 100 + times, over and over again then the server crashes.

 

@Hex_27

Code:

Caused by: java.lang.SomeWeirdException

 

@timtower @Hex_27
This does now belong to this forum, It belongs here.
http://bukkit.org/forums/plugin-help-development-requests.91/
Because,
~[spigot-1.8.3.jar:git-Spigot-2ec6f06-7722428]

 

@megamichiel I used the search function on the log where this happened for the word (or part of word) Exception, but found none that was applicable.

 

@_Error
But it's not something 1.8-only, therefor he's fine to ask here.

 

Doesn't matter, Even my plugin.yml question was moved to bukkit alternates.

 

Hey, back to topic here..?

 

bump

 

Bump