Server Crash
Open
Nobody has claimed this yet.
status: accepted
type: bug
version: 1.19
- Dominant language
- Java
- Stars
- 12.7k
- Forks
- 3.5k
- Avg merge
- 3d 13h
- Merged PRs (30d)
- 11
Description
Stack trace
[18:50:19 ERROR]: Encountered an unexpected exception
net.minecraft.ReportedException: Exception ticking world
at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1568) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.dedicated.DedicatedServer.b(DedicatedServer.java:479) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1406) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.MinecraftServer.x(MinecraftServer.java:1188) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:316) ~[patched_1.17.1.jar:git-Paper-186]
at java.lang.Thread.run(Thread.java:831) [?:?]
Caused by: java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1013) ~[?:?]
at java.util.ArrayList$Itr.next(ArrayList.java:967) ~[?:?]
at com.google.common.collect.Iterators$3.next(Iterators.java:174) ~[patched_1.17.1.jar:git-Paper-186]
at java.util.Iterator.forEachRemaining(Iterator.java:133) ~[?:?]
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) ~[?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?]
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?]
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?]
at net.minecraft.world.level.entity.PersistentEntitySectionManager.lambda$updateChunkStatus$6(PersistentEntitySectionManager.java:179) ~[patched_1.17.1.jar:git-Paper-186]
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?]
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:189) ~[?:?]
at java.util.Spliterators$LongIteratorSpliterator.forEachRemaining(Spliterators.java:2002) ~[?:?]
at java.util.Spliterator$OfLong.forEachRemaining(Spliterator.java:763) ~[?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?]
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?]
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?]
at net.minecraft.world.level.entity.PersistentEntitySectionManager.updateChunkStatus(PersistentEntitySectionManager.java:164) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.world.level.entity.PersistentEntitySectionManager.updateChunkStatus(PersistentEntitySectionManager.java:150) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.level.ChunkMap.onFullChunkStatusChange(ChunkMap.java:2112) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.level.ChunkHolder.demoteFullChunk(ChunkHolder.java:490) ~[app:?]
at net.minecraft.server.level.ChunkHolder.updateFutures(ChunkHolder.java:639) ~[app:?]
at net.minecraft.server.level.DistanceManager.runAllUpdates(DistanceManager.java:127) ~[app:?]
at net.minecraft.server.level.ServerChunkCache.runDistanceManagerUpdates(ServerChunkCache.java:640) ~[app:?]
at net.minecraft.server.level.ServerChunkCache.tick(ServerChunkCache.java:722) ~[app:?]
at net.minecraft.server.level.ServerLevel.tick(ServerLevel.java:555) ~[app:?]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1553) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:479) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1406) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1188) ~[patched_1.17.1.jar:git-Paper-186]
... 2 more
[18:50:19 ERROR]: Cause of unexpected exception was
java.util.ConcurrentModificationException: null
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:1013) ~[?:?]
at java.util.ArrayList$Itr.next(ArrayList.java:967) ~[?:?]
at com.google.common.collect.Iterators$3.next(Iterators.java:174) ~[patched_1.17.1.jar:git-Paper-186]
at java.util.Iterator.forEachRemaining(Iterator.java:133) ~[?:?]
at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801) ~[?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?]
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?]
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?]
at net.minecraft.world.level.entity.PersistentEntitySectionManager.lambda$updateChunkStatus$6(PersistentEntitySectionManager.java:179) ~[patched_1.17.1.jar:git-Paper-186]
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?]
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:189) ~[?:?]
at java.util.Spliterators$LongIteratorSpliterator.forEachRemaining(Spliterators.java:2002) ~[?:?]
at java.util.Spliterator$OfLong.forEachRemaining(Spliterator.java:763) ~[?:?]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) ~[?:?]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) ~[?:?]
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?]
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?]
at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?]
at net.minecraft.world.level.entity.PersistentEntitySectionManager.updateChunkStatus(PersistentEntitySectionManager.java:164) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.world.level.entity.PersistentEntitySectionManager.updateChunkStatus(PersistentEntitySectionManager.java:150) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.level.ChunkMap.onFullChunkStatusChange(ChunkMap.java:2112) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.level.ChunkHolder.demoteFullChunk(ChunkHolder.java:490) ~[app:?]
at net.minecraft.server.level.ChunkHolder.updateFutures(ChunkHolder.java:639) ~[app:?]
at net.minecraft.server.level.DistanceManager.runAllUpdates(DistanceManager.java:127) ~[app:?]
at net.minecraft.server.level.ServerChunkCache.runDistanceManagerUpdates(ServerChunkCache.java:640) ~[app:?]
at net.minecraft.server.level.ServerChunkCache.tick(ServerChunkCache.java:722) ~[app:?]
at net.minecraft.server.level.ServerLevel.tick(ServerLevel.java:555) ~[app:?]
at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1553) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:479) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1406) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1188) ~[patched_1.17.1.jar:git-Paper-186]
at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:316) ~[patched_1.17.1.jar:git-Paper-186]
at java.lang.Thread.run(Thread.java:831) [?:?]
[18:50:19 ERROR]: This crash report has been saved to: /minecraft/./crash-reports/crash-2021-08-20_18.50.19-server.txt
Plugin list
Agrum-Creator, ChestShop, CommandBook, CraftBook, LogBlock, LogBlockQuestioner*, LuckPerms, LWC, MCMailBox, Minequery*, MobArena, Multiverse-Core, Pitfall, ProtocolLib, spark, Vault, VoidGen, WorldEdit, WorldGuard, Ziggy
Actions to reproduce (if known)
No response
Paper version
This server is running Paper version git-Paper-186 (MC: 1.17.1) (Implementing API version 1.17.1-R0.1-SNAPSHOT) (Git: 72ce684)
Agreements
- I am running the latest version of Paper available from https://papermc.io/downloads.
- I have searched for and ensured there isn't already an open issue regarding this.
- My version of Minecraft is supported by Paper.
Other
Not using the latest version of paper, but don't see anything that would have been related to the crash in the builds since. Also a sporadic crash so figured it should still be reported.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start with the Java stack trace around PersistentEntitySectionManager.updateChunkStatus and the reported ConcurrentModificationException during world ticking. Trace the related ChunkMap, ChunkHolder, DistanceManager, ServerChunkCache, and ServerLevel calls; done means identifying the modification and confirming the server no longer crashes while ticking the world.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java
- Domain
- game-dev
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 18/100