NightBlood

Edited.

Hey, Im kinda new to forge modding and I was wondering which is the best way to implement a timer within a HarvestDropsEvent and a RightClickItem Events Ive been using a java.util.TimerTask but it has had ticks sync issues. I know this might be something simple but I havent been able to figure that out, thanks in advance. Edit: Code added. I just need the EntityFallingBlock to spawn every X seconds without using a java.util.TimerTask the way a Bukkit.getScheduler().sheduleSyncRepeatingTask for Spigot does. Error: Description: Exception in server tick loop java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1442) at java.util.HashMap$KeyIterator.next(HashMap.java:1466) at net.minecraft.entity.EntityTracker.tick(EntityTracker.java:295) at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:854) at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:743) at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:192) at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:592) at java.lang.Thread.run(Thread.java:748) Code: int i2 = 0; int max = 5; timer.schedule(new TimerTask() { @Override public void run() { if (i2 >= max) this.cancel(); if (i2 >= max) return; i2++; EntityFallingBlock tnt = new EntityFallingBlock(world, pos.getX()+0.5, pos.getY()+10, pos.getZ()+0.5, Blocks.TNT.getDefaultState()); tnt.fallTime = 1; world.spawnEntity(tnt); } }, 0, 500);