I'm using Forge for 1.18.2 with 130ish mods and I'm getting random server crashes. Sometimes after ten minutes, or sometimes it's fine for two or three hours then crashes. It's not a downloaded mod pack, just something I've put together for a couple friends and myself to play. Here's a link to the debug.log and crash report files: https://gist.github.com/filnari/aed0a02f43d12eaacd83a297c3193ef6

Any advice would be greatly appreciated.

Thanks,
Filnari

Quote

java.util.ConcurrentModificationException: null

at java.util.LinkedHashMap$LinkedHashIterator.nextNode(LinkedHashMap.java:756) ~[?:?] {}

at java.util.LinkedHashMap$LinkedKeyIterator.next(LinkedHashMap.java:778) ~[?:?] {}

at net.minecraft.world.entity.ai.goal.GoalSelector.m_186081_(GoalSelector.java:117) ~[server-1.18.2-20220404.173914-srg.jar%23170!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:botania_xplat.mixins.json:AccessorGoalSelector,pl:mixin:A}

at net.minecraft.world.entity.ai.goal.GoalSelector.m_25373_(GoalSelector.java:110) ~[server-1.18.2-20220404.173914-srg.jar%23170!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:botania_xplat.mixins.json:AccessorGoalSelector,pl:mixin:A}

at net.minecraft.world.entity.Mob.m_6140_(Mob.java:701) ~[server-1.18.2-20220404.173914-srg.jar%23170!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:bookshelf.common.mixins.json:entity.AccessorMob,pl:mixin:APP:dungeons_plus.mixins.json:MobMixin,pl:mixin:APP:botania_xplat.mixins.json:AccessorMob,pl:mixin:APP:tombstone.mixins.json:MobMixin,pl:mixin:A}

at net.minecraft.world.entity.LivingEntity.m_8107_(LivingEntity.java:2506) ~[server-1.18.2-20220404.173914-srg.jar%23170!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:citadel.mixins.json:LivingEntityMixin,pl:mixin:APP:bookshelf.common.mixins.json:entity.AccessorLivingEntity,pl:mixin:APP:apotheosis.mixins.json:LivingEntityMixin,pl:mixin:APP:apotheosis.mixins.json:LivingEntityInvoker,pl:mixin:APP:supplementaries.mixins.json:LivingEntityMixin,pl:mixin:APP:botania_xplat.mixins.json:AccessorLivingEntity,pl:mixin:APP:curios.mixins.json:MixinLivingEntity,pl:mixin:APP:tombstone.mixins.json:LivingEntityMixin,pl:mixin:APP:caelus.mixins.json:MixinLivingEntity,pl:mixin:APP:betterdeserttemples.mixins.json:PharaohKilledMixin,pl:mixin:APP:ars_nouveau.mixins.json:ExpInvokerMixin,pl:mixin:APP:ars_nouveau.mixins.json:elytra.MixinLivingEntity,pl:mixin:APP:quark.mixins.json:accessor.AccessorLivingEntity,pl:mixin:APP:mna.mixins.json:LivingEntityFireWalkerMixin,pl:mixin:APP:expandability.mixins.json:swimming.LivingEntityMixin,pl:mixin:APP:assets/enigmaticlegacy/enigmaticlegacy.mixins.json:MixinLivingEntity,pl:mixin:APP:create.mixins.json:CustomItemUseEffectsMixin,pl:mixin:APP:create.mixins.json:accessor.LivingEntityAccessor,pl:mixin:A}

The error says one of your mods is modifying the skeleton's AI in an invalid way.

There is nothing in that error that identifies the problem mod and there is no other mention of a problem in your log.

Above, I have underlined the mods that are mentioned as modifying code in this area.

 

You should start by checking you have the latest version of these mods (do the same for your other mods as well).

Then check if any of them have known issues about this is in their bug reports and/or contact the mod authors.

 

Failing that, the only thing you can do is to make a backup of your world and then experiment with removing mods until you find the problem mod.

Since you say this is "random" this is going to be a difficult task.

The most likely mods would be those that are about changing mobs or combat

or new/obscure mods that have very few downloads