Server Performance - Smooth Chunk Save[Forge/Fabric]

Server Performance - Smooth Chunk Save[Forge/Fabric]

Mods
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[Bug]: 1.19.2 Server keeps crashing

Closed this issue ยท 1 comments

commented

Describe the bug you're experiencing

After adding the smoothchunksave the server keeps crashing after a while.

This is the section for the crash.

Time: 2025-07-22 08:08:46
Description: Exception in server tick loop

java.util.ConcurrentModificationException: null
	at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1095) ~[?:?] {}
	at java.util.ArrayList$Itr.next(ArrayList.java:1049) ~[?:?] {}
	at com.google.common.collect.Iterators$1.next(Iterators.java:146) ~[guava-31.0.1-jre.jar%23105!/:?] {}
	at java.util.Iterator.forEachRemaining(Iterator.java:133) ~[?:?] {re:mixin}
	at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1939) ~[?:?] {}
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?] {}
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?] {}
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[?:?] {}
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[?:?] {}
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] {}
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?] {}
	at net.minecraft.world.level.entity.PersistentEntitySectionManager.m_157543_(PersistentEntitySectionManagerMixin.java:175) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:world.level.entity.PersistentEntitySectionManagerMixin,pl:mixin:A}
	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) ~[?:?] {}
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[?:?] {}
	at java.util.stream.LongPipeline$1$1.accept(LongPipeline.java:177) ~[?:?] {}
	at java.util.PrimitiveIterator$OfLong.forEachRemaining(PrimitiveIterator.java:185) ~[?:?] {re:mixin}
	at java.util.Spliterators$LongIteratorSpliterator.forEachRemaining(Spliterators.java:2144) ~[?:?] {}
	at java.util.Spliterator$OfLong.forEachRemaining(Spliterator.java:777) ~[?:?] {}
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?] {}
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?] {}
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[?:?] {}
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[?:?] {}
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] {}
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?] {}
	at net.minecraft.world.level.entity.PersistentEntitySectionManager.m_157527_(PersistentEntitySectionManagerMixin.java:160) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:world.level.entity.PersistentEntitySectionManagerMixin,pl:mixin:A}
	at net.minecraft.world.level.entity.PersistentEntitySectionManager.m_157524_(PersistentEntitySectionManagerMixin.java:146) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:world.level.entity.PersistentEntitySectionManagerMixin,pl:mixin:A}
	at net.minecraft.server.level.ChunkMap.m_143075_(ChunkMapMixin.java:1256) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.level.ChunkMapMixin,pl:mixin:APP:chunkpregen.mixins.json:common.storage.ChunkManagerMixin,pl:mixin:APP:ftbchunks-common.mixins.json:ChunkMapMixin,pl:mixin:APP:smoothchunk.mixins.json:ChunkMapMixin,pl:mixin:APP:mixins.arclight.impl.forge.optimization.json:network.ChunkMapMixin_Optimize,pl:mixin:APP:mixins.arclight.impl.forge.optimization.json:trackingrange.ChunkManagerMixin_TrackingRange,pl:mixin:A,pl:arclight_implementer:async,pl:arclight_implementer:A}
	at net.minecraft.server.level.ChunkHolder.m_142992_(ChunkHolderMixin.java:347) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.level.ChunkHolderMixin,pl:mixin:APP:chunkpregen.mixins.json:common.chunk.ChunkHolderMixin,pl:mixin:APP:chunksending.mixins.json:ChunkHolderMixin,pl:mixin:A}
	at net.minecraft.server.level.ChunkHolder.m_143003_(ChunkHolderMixin.java:417) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.level.ChunkHolderMixin,pl:mixin:APP:chunkpregen.mixins.json:common.chunk.ChunkHolderMixin,pl:mixin:APP:chunksending.mixins.json:ChunkHolderMixin,pl:mixin:A}
	at net.minecraft.server.level.DistanceManager.m_183906_(DistanceManagerMixin.java:124) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.level.DistanceManagerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.storage.TicketManagerMixin,pl:mixin:A}
	at net.minecraft.server.level.DistanceManager.redirect$bpb000$arclight$safeIter(DistanceManagerMixin.java:556) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.level.DistanceManagerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.storage.TicketManagerMixin,pl:mixin:A}
	at net.minecraft.server.level.DistanceManager.m_140805_(DistanceManagerMixin.java:123) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.level.DistanceManagerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.storage.TicketManagerMixin,pl:mixin:A}
	at net.minecraft.server.level.ServerChunkCache.m_8489_(ServerChunkCacheMixin.java:271) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:cupboard.mixins.json:ChunkLoadDebug,pl:mixin:APP:mixins.arclight.core.json:server.level.ServerChunkCacheMixin,pl:mixin:APP:chunkpregen.mixins.json:common.storage.ServerChunkProviderMixin,pl:mixin:APP:smoothchunk.mixins.json:ServerChunkCacheMixin,pl:mixin:A,re:mixin,pl:accesstransformer:B}
	at net.minecraft.server.level.ServerChunkCache.bridge$tickDistanceManager(ServerChunkCacheMixin.java) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:cupboard.mixins.json:ChunkLoadDebug,pl:mixin:APP:mixins.arclight.core.json:server.level.ServerChunkCacheMixin,pl:mixin:APP:chunkpregen.mixins.json:common.storage.ServerChunkProviderMixin,pl:mixin:APP:smoothchunk.mixins.json:ServerChunkCacheMixin,pl:mixin:A,re:mixin,pl:accesstransformer:B}
	at net.minecraft.server.level.ServerChunkCache$MainThreadExecutor.m_7245_(ServerChunkCache_MainThreadExecutorMixin.java:625) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,re:classloading,pl:mixin:APP:mixins.arclight.core.json:server.level.ServerChunkCache_MainThreadExecutorMixin,pl:mixin:A}
	at net.minecraft.server.level.ServerChunkCache.m_8466_(ServerChunkCacheMixin.java:267) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:cupboard.mixins.json:ChunkLoadDebug,pl:mixin:APP:mixins.arclight.core.json:server.level.ServerChunkCacheMixin,pl:mixin:APP:chunkpregen.mixins.json:common.storage.ServerChunkProviderMixin,pl:mixin:APP:smoothchunk.mixins.json:ServerChunkCacheMixin,pl:mixin:A,re:mixin,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.m_129961_(MinecraftServerMixin.java:751) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:ae2.mixins.json:spatial.MinecraftServerMixin,pl:mixin:APP:vanishmod.mixins.json:gui.MinecraftServerMixin,pl:mixin:A,re:mixin,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.m_7245_(MinecraftServerMixin.java:740) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:ae2.mixins.json:spatial.MinecraftServerMixin,pl:mixin:APP:vanishmod.mixins.json:gui.MinecraftServerMixin,pl:mixin:A,re:mixin,pl:accesstransformer:B}
	at net.minecraft.util.thread.BlockableEventLoop.m_18699_(BlockableEventLoop.java:116) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,re:mixin,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.m_130012_(MinecraftServerMixin.java:725) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:ae2.mixins.json:spatial.MinecraftServerMixin,pl:mixin:APP:vanishmod.mixins.json:gui.MinecraftServerMixin,pl:mixin:A,re:mixin,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.m_130011_(MinecraftServerMixin.java:2131) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:ae2.mixins.json:spatial.MinecraftServerMixin,pl:mixin:APP:vanishmod.mixins.json:gui.MinecraftServerMixin,pl:mixin:A,re:mixin,pl:accesstransformer:B}
	at net.minecraft.server.MinecraftServer.m_206580_(MinecraftServerMixin.java:244) ~[server-1.19.2-20220805.130853-srg.jar%23439!/:?] {re:mixin,pl:accesstransformer:B,re:computing_frames,pl:accesstransformer:B,re:classloading,pl:accesstransformer:B,pl:mixin:APP:mixins.arclight.core.json:server.MinecraftServerMixin,pl:mixin:APP:citadel.mixins.json:MinecraftServerMixin,pl:mixin:APP:balm.mixins.json:MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.MinecraftServerMixin,pl:mixin:APP:chunkpregen.mixins.json:common.server.ServerSeedMixin,pl:mixin:APP:ae2.mixins.json:spatial.MinecraftServerMixin,pl:mixin:APP:vanishmod.mixins.json:gui.MinecraftServerMixin,pl:mixin:A,re:mixin,pl:accesstransformer:B}
	at java.lang.Thread.run(Thread.java:1583) [?:?] {re:mixin,re:mixin}

Reproducability

the server just keeps crashing after a while with this mod.

Mod up to date

  • Before submitting this issue I updated to the newest version and reproduced it

Minecraft version

1.19.2

Modloader version

Forge

Logs

https://gist.github.com/Madtrent/002b2d23fe978dde01e2f27d6b86e6b8

commented

I'm making my mods for forge or fabric, you're running arclight with bukkit which is creating the crashing issue.
So this is unsupported from my side, you can try asking arclight to fix it