[Solved] [1.15.2] Global Loot Modifier Difficulties

[Nuke3d]

As a pretext to adding some Items to various mob and chest loot tables, I decided to just modify the vanilla zombie loot table. I think things are Registering correctly, but I am getting some null pointer exceptions thrown whenever loot generation occurs. Not even for Zombies. Just random stuff. Here's the details:

Code/JSON items relevant to issue(I think):

https://github.com/nuke3d/NukesEcon/blob/master/src/main/resources/data/forge/loot_modifiers/global_loot_modifiers.json

https://github.com/nuke3d/NukesEcon/blob/master/src/main/resources/data/nukesecon/loot_modifiers/zombie.json

https://github.com/nuke3d/NukesEcon/blob/master/src/main/java/com/nuke3dtv/nukesecon/data/LootTableModifier.java

https://github.com/nuke3d/NukesEcon/blob/master/src/main/java/com/nuke3dtv/nukesecon/setup/Registration.java

 

Exception detail:

[15:53:30] [Server thread/FATAL] [minecraft/ThreadTaskExecutor]: Error executing task on Server
java.lang.NullPointerException: null
    at net.minecraft.world.storage.loot.conditions.EntityHasProperty.test(EntityHasProperty.java:32) ~[?:?] {re:classloading}
    at net.minecraft.world.storage.loot.conditions.EntityHasProperty.test(EntityHasProperty.java:18) ~[?:?] {re:classloading}
    at net.minecraftforge.common.loot.LootModifier.apply(LootModifier.java:53) ~[?:?] {re:classloading}
    at net.minecraftforge.common.ForgeHooks.modifyLoot(ForgeHooks.java:1194) ~[?:?] {re:classloading}
    at net.minecraft.world.storage.loot.LootTable.generate(LootTable.java:86) ~[?:?] {re:classloading}
    at net.minecraft.block.Block.getDrops(Block.java:622) ~[?:?] {re:classloading,pl:accesstransformer:B}...

 

Any guidance on where the problem is would be appreciated. I'll keep plugging away at it in the meantime. Thank you!

 

Edited March 6, 2021 by Nuke3d
Solved

[Nuke3d]

Quick update. I created a flat world and used a spawn egg to spawn a zombie. Killed the zombie and the error occurred again, so there's definitely something wrong with my stuff.

 

Here is a more complete error log:

[19:08:01] [Server thread/ERROR] [minecraft/MinecraftServer]: Encountered an unexpected exception
net.minecraft.crash.ReportedException: Ticking entity
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:890) ~[?:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:821) ~[?:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.server.integrated.IntegratedServer.tick(IntegratedServer.java:120) ~[?:?] {re:classloading,pl:runtimedistcleaner:A}
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:662) [?:?] {re:classloading,pl:accesstransformer:B}
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_151] {}
Caused by: java.lang.NullPointerException
	at net.minecraft.world.storage.loot.conditions.EntityHasProperty.test(EntityHasProperty.java:32) ~[?:?] {re:classloading}
	at net.minecraft.world.storage.loot.conditions.EntityHasProperty.test(EntityHasProperty.java:18) ~[?:?] {re:classloading}
	at net.minecraftforge.common.loot.LootModifier.apply(LootModifier.java:53) ~[?:?] {re:classloading}
	at net.minecraftforge.common.ForgeHooks.modifyLoot(ForgeHooks.java:1194) ~[?:?] {re:classloading}
	at net.minecraft.world.storage.loot.LootTable.generate(LootTable.java:86) ~[?:?] {re:classloading}
	at net.minecraft.entity.LivingEntity.dropLoot(LivingEntity.java:1246) ~[?:?] {re:classloading}
	at net.minecraft.entity.MobEntity.dropLoot(MobEntity.java:471) ~[?:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.entity.LivingEntity.spawnDrops(LivingEntity.java:1204) ~[?:?] {re:classloading}
	at net.minecraft.entity.LivingEntity.onDeath(LivingEntity.java:1165) ~[?:?] {re:classloading}
	at net.minecraft.entity.LivingEntity.attackEntityFrom(LivingEntity.java:1013) ~[?:?] {re:classloading}
	at net.minecraft.entity.monster.MonsterEntity.attackEntityFrom(MonsterEntity.java:68) ~[?:?] {re:classloading}
	at net.minecraft.entity.monster.ZombieEntity.attackEntityFrom(ZombieEntity.java:335) ~[?:?] {re:classloading}
	at net.minecraft.entity.Entity.baseTick(Entity.java:428) ~[?:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.entity.LivingEntity.baseTick(LivingEntity.java:289) ~[?:?] {re:classloading}
	at net.minecraft.entity.MobEntity.baseTick(MobEntity.java:232) ~[?:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.entity.Entity.tick(Entity.java:396) ~[?:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.entity.LivingEntity.tick(LivingEntity.java:2184) ~[?:?] {re:classloading}
	at net.minecraft.entity.MobEntity.tick(MobEntity.java:311) ~[?:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.entity.monster.ZombieEntity.tick(ZombieEntity.java:224) ~[?:?] {re:classloading}
	at net.minecraft.world.server.ServerWorld.updateEntity(ServerWorld.java:615) ~[?:?] {re:classloading}
	at net.minecraft.world.World.guardEntityTick(World.java:586) ~[?:?] {re:classloading,pl:accesstransformer:B}
	at net.minecraft.world.server.ServerWorld.tick(ServerWorld.java:404) ~[?:?] {re:classloading}
	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:886) ~[?:?] {re:classloading,pl:accesstransformer:B}
	... 4 more

 

[Nuke3d]

Thank you! I will see about handling it manually for now. Planning on going to 1.16 soon, but wasn't go to do that quite yet.

[Nuke3d]

Ended up moving to 1.16 where it worked fine. Thanks again.