Java util concurrentmodificationexception майнкрафт

Java util concurrentmodificationexception майнкрафт

Upon loading a new world with the seed 521246738659102639, in Creative Mode, under the default world type with generate structures turned on and bonus chest off, a fatal exception was thrown upon world generation. The result was that the chunks immediately surrounding the spawn point did not exist.

Attempting to relate it to common graphical world hole glitches, I used F3 + A to reload the chunks. But the hole remained. The bug was not graphical, but the blocks literally did not exist. However, upon reloading the world, the issue disappeared.

I created this as a new ticket because it didn’t seem to relate to all other concurrentModificationException tickets, for this one was caused by something completely different.

First picture is of the world hole, second is after reloading the world.

ADDITIONAL NOTES: Chunk loading in that world seemed to take twice the computing power and go half as quickly after this incident. It may just be in my head though.

[16:48:10] [Client thread/FATAL]: Error executing task java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException at java.util.concurrent.FutureTask.report(FutureTask.java:122) ~[?:1.8.0_25] at java.util.concurrent.FutureTask.get(FutureTask.java:192) ~[?:1.8.0_25] at w.a(SourceFile:45) [1.8.2-pre1.jar:?] at bst.at(SourceFile:876) [1.8.2-pre1.jar:?] at bst.a(SourceFile:321) [1.8.2-pre1.jar:?] at net.minecraft.client.main.Main.main(SourceFile:124) [1.8.2-pre1.jar:?] Caused by: java.util.ConcurrentModificationException at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429) ~[?:1.8.0_25] at java.util.HashMap$KeyIterator.next(HashMap.java:1453) ~[?:1.8.0_25] at ue.(SourceFile:21) ~[1.8.2-pre1.jar:?] at bfg.(SourceFile:80) ~[1.8.2-pre1.jar:?] at cel.c(SourceFile:50) ~[1.8.2-pre1.jar:?] at cen.b(SourceFile:135) ~[1.8.2-pre1.jar:?] at cee.a(SourceFile:890) ~[1.8.2-pre1.jar:?] at jt.a(SourceFile:81) ~[1.8.2-pre1.jar:?] at jt.a(SourceFile:10) ~[1.8.2-pre1.jar:?] at ii.run(SourceFile:13) ~[1.8.2-pre1.jar:?] at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) ~[?:1.8.0_25] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_25] at w.a(SourceFile:44) ~[1.8.2-pre1.jar:?] . 3 more

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[1.12] Serverside concurrent modification exception #295

[1.12] Serverside concurrent modification exception #295

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java.util.ConcurrentModificationException
—- Minecraft Crash Report —-
// I let you down. Sorry 🙁

Time: 3/29/20 5:23 PM
Description: Exception ticking world

java.util.ConcurrentModificationException
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
at java.util.ArrayList$Itr.next(ArrayList.java:851)
at icbm.classic.lib.radar.RadarMap.collectEntitiesInChunk(RadarMap.java:228)
at icbm.classic.content.entity.missile.MissileEventHandler.chunkUnload(MissileEventHandler.java:43)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_6_MissileEventHandler_chunkUnload_Unload.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraft.world.chunk.Chunk.func_76623_d(Chunk.java:879)
at net.minecraft.world.gen.ChunkProviderServer.func_73156_b(ChunkProviderServer.java:269)
at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:207)
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:756)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Thread.java:745)

A detailed walkthrough of the error, its code path and all known details is as follows:

— Head —
Thread: Server thread
Stacktrace:
at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
at java.util.ArrayList$Itr.next(ArrayList.java:851)
at icbm.classic.lib.radar.RadarMap.collectEntitiesInChunk(RadarMap.java:228)
at icbm.classic.content.entity.missile.MissileEventHandler.chunkUnload(MissileEventHandler.java:43)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler_6_MissileEventHandler_chunkUnload_Unload.invoke(.dynamic)
at net.minecraftforge.fml.common.eventhandler.ASMEventHandler.invoke(ASMEventHandler.java:90)
at net.minecraftforge.fml.common.eventhandler.EventBus.post(EventBus.java:182)
at net.minecraft.world.chunk.Chunk.func_76623_d(Chunk.java:879)
at net.minecraft.world.gen.ChunkProviderServer.func_73156_b(ChunkProviderServer.java:269)
at net.minecraft.world.WorldServer.func_72835_b(WorldServer.java:207)

— Affected level —
Details:
Level name: New World
All players: 1 total; [EntityPlayerMP[‘Joseph_da_IT_Guy’/2525, l=’New World’, x=53.61, y=79.24, z=208.05]]
Chunk stats: ServerChunkCache: 449 Drop: 9
Level seed: -1797220104376273678
Level generator: ID 00 — default, ver 1. Features enabled: true
Level generator options:
Level spawn location: World: (208,64,256), Chunk: (at 0,4,0 in 13,16; contains blocks 208,0,256 to 223,255,271), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
Level time: 23524 game time, 2287 day time
Level dimension: 0
Level storage version: 0x04ABD — Anvil
Level weather: Rain time: 55174 (now: false), thunder time: 32987 (now: false)
Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:756)
at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:668)
at net.minecraft.server.integrated.IntegratedServer.func_71217_p(IntegratedServer.java:185)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:526)
at java.lang.Thread.run(Thread.java:745)

— System Details —
Details:
Minecraft Version: 1.12.2
Operating System: Windows 10 (amd64) version 10.0
Java Version: 1.8.0_51, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 575642104 bytes (548 MB) / 1241513984 bytes (1184 MB) up to 2147483648 bytes (2048 MB)
JVM Flags: 8 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx2G -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=50 -XX:G1HeapRegionSize=32M
IntCache: cache: 0, tcache: 0, allocated: 12, tallocated: 94
FML: MCP 9.42 Powered by Forge 14.23.5.2838 5 mods loaded, 5 mods active
States: ‘U’ = Unloaded ‘L’ = Loaded ‘C’ = Constructed ‘H’ = Pre-initialized ‘I’ = Initialized ‘J’ = Post-initialized ‘A’ = Available ‘D’ = Disabled ‘E’ = Errored

| State | ID | Version | Source | Signature | |:------ |:----------- |:--------------------------- |:-------------------------------------------- |:---------------------------------------- | | LCHIJA | minecraft | 1.12.2 | minecraft.jar | None | | LCHIJA | mcp | 9.42 | minecraft.jar | None | | LCHIJA | FML | 8.0.99.99 | forge-1.12.2-14.23.5.2838.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 | | LCHIJA | forge | 14.23.5.2838 | forge-1.12.2-14.23.5.2838.jar | e3c3d50c7c986df74c645c0ac54639741c90a557 | | LCHIJA | icbmclassic | 1.12.2-4.0.1.20200328215453 | ICBM-classic-1.12.2-4.0.1b20200328215453.jar | None | Loaded coremods (and transformers): GL info: ~~ERROR~~ RuntimeException: No OpenGL context found in the current thread. Profiler Position: N/A (disabled) Player Count: 1 / 8; [EntityPlayerMP['Joseph_da_IT_Guy'/2525, l='New World', x=53.61, y=79.24, z=208.05]] Type: Integrated Server (map_client.txt) Is Modded: Definitely; Client brand changed to 'fml,forge' 

The text was updated successfully, but these errors were encountered:

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Minecraft Forums

[Solved]It throws java.util.ConcurrentModificationException

One day, I used the MagicLauncher to launch Minecraft. I chose 1.7.2-forge as the Minecraft version.But it didn’t work.
So I gave up launching Minecraft by using the MagicLauncher, and tried to launch Minecraft by using original launcher. But when I chose the forge as the Minecraft version, it crashed and threw this exception.

[09:09:44 INFO]: Client> java.util.ConcurrentModificationException [09:09:44 INFO]: Client> at java.util.ArrayList$Itr.checkForComodification(Unknown Source) ~[?:1.8.0_20-ea] [09:09:44 INFO]: Client> at java.util.ArrayList$Itr.remove(Unknown Source) ~[?:1.8.0_20-ea] [09:09:44 INFO]: Client> at net.minecraft.launchwrapper.Launch.launch(Launch.java:117) [launchwrapper-1.9.jar:?] [09:09:44 INFO]: Client> at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

I did these things for solving this problem.
-Reinstall Minecraft forge
-Restore .minecraft folder from the backup

But the problem wasn’t solved.It normally works when I choose vanilla versions.
Would you mind telling me how to solve this problem?

OS:Windows 8
Java:1.8.0 Update 20

Although I’m not English, I probably made grammar mistakes.If so, I’m sorry.

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