Solved Illegal State Exception

Code:

@EventHandler
    public void onTNTExplode(EntityExplodeEvent event) {
        for (Iterator<Block> it = event.blockList().iterator(); it.hasNext();) {
            it.remove();
        }
        return;
    }

I tried using this code to prevent other errors like conccurentmodification exception, but now Im getting this

Code:

org.bukkit.event.EventException
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:341)
at org.bukkit.plugin.RegisteredListener.callEvent(RegisteredListener.java:62)
at org.bukkit.plugin.SimplePluginManager.fireEvent(SimplePluginManager.java:477)
at org.bukkit.plugin.SimplePluginManager.callEvent(SimplePluginManager.java:462)
at net.minecraft.server.Explosion.a(Explosion.java:203)
at net.minecraft.server.World.createExplosion(World.java:1524)
at net.minecraft.server.WorldServer.createExplosion(WorldServer.java:745)
at net.minecraft.server.EntityTNTPrimed.explode(EntityTNTPrimed.java:81)
at net.minecraft.server.EntityTNTPrimed.h_(EntityTNTPrimed.java:61)
at net.minecraft.server.World.entityJoinedWorld(World.java:1245)
at net.minecraft.server.WorldServer.entityJoinedWorld(WorldServer.java:511)
at net.minecraft.server.World.playerJoinedWorld(World.java:1227)
at net.minecraft.server.World.tickEntities(World.java:1125)
at net.minecraft.server.WorldServer.tickEntities(WorldServer.java:428)
at net.minecraft.server.MinecraftServer.q(MinecraftServer.java:563)
at net.minecraft.server.DedicatedServer.q(DedicatedServer.java:213)
at net.minecraft.server.MinecraftServer.p(MinecraftServer.java:473)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:405)
at net.minecraft.server.ThreadServerApplication.run(SourceFile:539)
Caused by: java.lang.IllegalStateException
at java.util.ArrayList$Itr.remove(ArrayList.java:767)
at com.survivorspvp.ttt.TTTListener.onTNTExplode(TTTListener.java:220)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:616)
at org.bukkit.plugin.java.JavaPluginLoader$1.execute(JavaPluginLoader.java:339)
... 18 more

Any ideas?

EDIT: I am trying to block tnt from doing block damage.

EDIT2: The problem is on it.remove();

EDIT3: Solved with it.next();