Posted April 19, 20178 yr So I want my entity to be able to swap out its AI so that it can go from doing one thing to another, however, in doing this it seems to cause a ConcurrentModificationException: at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:719) at java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:742) at net.minecraft.entity.ai.EntityAITasks.onUpdateTasks(EntityAITasks.java:70) at net.minecraft.entity.EntityLiving.updateEntityActionState(EntityLiving.java:846) at net.minecraft.entity.EntityLivingBase.onLivingUpdate(EntityLivingBase.java:2470) at net.minecraft.entity.EntityLiving.onLivingUpdate(EntityLiving.java:640) at net.minecraft.entity.EntityAgeable.onLivingUpdate(EntityAgeable.java:194) at net.minecraft.entity.passive.EntityAnimal.onLivingUpdate(EntityAnimal.java:46) at willr27.blocklings.entity.EntityBlockling.onLivingUpdate(EntityBlockling.java:894) at net.minecraft.entity.EntityLivingBase.onUpdate(EntityLivingBase.java:2296) at net.minecraft.entity.EntityLiving.onUpdate(EntityLiving.java:344) at net.minecraft.world.World.updateEntityWithOptionalForce(World.java:2117) at net.minecraft.world.WorldServer.updateEntityWithOptionalForce(WorldServer.java:876) at net.minecraft.world.World.updateEntity(World.java:2083) I can never get this to replicate consistently so seems somewhat random to me at the moment. Just wondering if anyone has come across this before? I'm just using addTask(...) and removeTask(...) to add and remove the AI.
April 19, 20178 yr I think it would be better to line up your AI tasks in priority order similar to the way vanilla entities do. Then write your logic into the tasks' should-run and should-continue methods. I think those are what decide whether a particular AI task should "swap out" so something else can run. In other words, AI tasks shouldn't be unplugged, they should merely give up control. Edited April 19, 20178 yr by jeffryfisher The debugger is a powerful and necessary tool in any IDE, so learn how to use it. You'll be able to tell us more and get better help here if you investigate your runtime problems in the debugger before posting.
April 19, 20178 yr Author Okay, I sort of figured as much, but wasn't too sure whether there was a way around it or not. I will just redo some of the logic then in the AI code, thanks.
April 20, 20178 yr You shouldn't modify the task list. You should instead have tasks return false from canExecute. Apparently I'm a complete and utter jerk and come to this forum just like to make fun of people, be confrontational, and make your personal life miserable. If you think this is the case, JUST REPORT ME. Otherwise you're just going to get reported when you reply to my posts and point it out, because odds are, I was trying to be nice. Exception: If you do not understand Java, I WILL NOT HELP YOU and your thread will get locked. DO NOT PM ME WITH PROBLEMS. No help will be given.
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