Game tries to generate chunks and then crashes: Writing into PalettedContainer from multiple threads

Clarification note

This report is only for Java version 1.8.0_51 or higher. See MC-132073 for older Java versions.

1. I just flew and then some chunks failed to load
2. I tried to fly away and then some chunks shown in-game, but not in 'problematic' zone
3. I flew into 'problematic' zone again and chunks shown
4. Game somehow bugged and some chunks became invisible
5. Some invisible chunks reappeared(they blinked)
6. I flew into 'void' zone, where chunks still not generated/shown
7. Everything disappeared, i tried to fly back to zone, that was visible
8. Game crashed

I made some tests:
Java 11: 2 runs, 2 crashes
Java 8: 1 run, 0 crashes, but same buggy chunk loading/generating behavior

18w43c\: [^crash-2018-10-27_05.19.52-server.txt]

---- Minecraft Crash Report ----
// Everything's going to plan. No, really, that was supposed to happen.

Time: 10/27/18, 5:19 AM
Description: Writing into PalettedContainer from multiple threads

java.lang.IllegalStateException
	at boo.b(SourceFile:42)
	at boo.a(SourceFile:109)
	at boi.a(SourceFile:44)
	at bop.a(SourceFile:181)
	at bpt.d(SourceFile:121)
	at bnw.c(SourceFile:145)
	at boa.a(SourceFile:119)
	at boa.i(SourceFile:37)
	at boa.a(SourceFile:200)
	at ty.a(SourceFile:457)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
	at java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:479)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)


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

-- Head --
Thread: Server thread
Stacktrace:
	at boo.b(SourceFile:42)

-- Thread dumps --
Details:
	Thread dumps: Chunk Batcher 2: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:547)
	at app//dab.d(SourceFile:170)
	at app//dac.run(SourceFile:41)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Snooper Timer: 
	at [email protected]/java.lang.Object.wait(Native Method)
	at [email protected]/java.lang.Object.wait(Object.java:328)
	at [email protected]/java.util.TimerThread.mainLoop(Timer.java:527)
	at [email protected]/java.util.TimerThread.run(Timer.java:506)
Chunk Batcher 7: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:547)
	at app//dab.d(SourceFile:170)
	at app//dac.run(SourceFile:41)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Netty Local Client IO #0: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
	at app//io.netty.util.concurrent.SingleThreadEventExecutor.takeTask(SingleThreadEventExecutor.java:238)
	at app//io.netty.channel.DefaultEventLoop.run(DefaultEventLoop.java:52)
	at app//io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Chunk Batcher 5: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:547)
	at app//dab.d(SourceFile:170)
	at app//dac.run(SourceFile:41)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Finalizer: 
	at [email protected]/java.lang.Object.wait(Native Method)
	at [email protected]/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155)
	at [email protected]/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:176)
	at [email protected]/java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:170)
Netty Server IO #1: 
	at [email protected]/sun.nio.ch.EPoll.wait(Native Method)
	at [email protected]/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120)
	at [email protected]/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:124)
	at [email protected]/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:136)
	at app//io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:756)
	at app//io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:411)
	at app//io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Server thread: 
	at app//boo.a(SourceFile:205)
	at app//bot.a(SourceFile:554)
	at app//bot.a(SourceFile:323)
	at app//ty.a(SourceFile:550)
	at app//ty.b(SourceFile:622)
	at app//ty.a(SourceFile:601)
	at app//tz.a(SourceFile:177)
	at app//net.minecraft.server.MinecraftServer.b(SourceFile:730)
	at app//net.minecraft.server.MinecraftServer.a(SourceFile:664)
	at app//djq.a(SourceFile:125)
	at app//net.minecraft.server.MinecraftServer.run(SourceFile:568)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Resource IO {0}: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:433)
	at [email protected]/java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1054)
	at [email protected]/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1114)
	at [email protected]/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Thread-1: 
	at [email protected]/java.lang.Thread.sleep(Native Method)
	at app//paulscode.sound.SimpleThread.snooze(SimpleThread.java:196)
	at app//paulscode.sound.CommandThread.run(CommandThread.java:133)
Light executor 0: 
	at app//bzp.b(SourceFile:158)
	at app//bzw.a(SourceFile:79)
	at app//bzp.b(SourceFile:197)
	at app//bzr.a(SourceFile:117)
	at app//bzu.a(SourceFile:54)
	at app//ud.b(SourceFile:105)
	at app//ud$$Lambda$2086/0x00000008007ea840.run(Unknown Source)
	at [email protected]/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at [email protected]/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Chunk Batcher 3: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:547)
	at app//dab.d(SourceFile:170)
	at app//dac.run(SourceFile:41)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Timer hack thread: 
	at [email protected]/java.lang.Thread.sleep(Native Method)
	at app//cjk$1.run(SourceFile:608)
Java2D Disposer: 
	at [email protected]/java.lang.Object.wait(Native Method)
	at [email protected]/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155)
	at [email protected]/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:176)
	at [email protected]/sun.java2d.Disposer.run(Disposer.java:144)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Reference Handler: 
	at [email protected]/java.lang.ref.Reference.waitForReferencePendingList(Native Method)
	at [email protected]/java.lang.ref.Reference.processPendingReferences(Reference.java:241)
	at [email protected]/java.lang.ref.Reference$ReferenceHandler.run(Reference.java:213)
ObjectCleanerThread: 
	at [email protected]/java.lang.Object.wait(Native Method)
	at [email protected]/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155)
	at app//io.netty.util.internal.ObjectCleaner$1.run(ObjectCleaner.java:54)
	at app//io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Thread-2: 
	at [email protected]/java.lang.Thread.sleep(Native Method)
	at app//paulscode.sound.SimpleThread.snooze(SimpleThread.java:196)
	at app//paulscode.sound.StreamThread.run(StreamThread.java:98)
Chunk Batcher 1: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:547)
	at app//dab.d(SourceFile:170)
	at app//dac.run(SourceFile:41)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Narrator: 
	at [email protected]/java.lang.Thread.sleep(Native Method)
	at app//com.mojang.text2speech.NarratorLinux$NarratorThread.run(NarratorLinux.java:56)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Chunk Batcher 4: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:547)
	at app//dab.d(SourceFile:170)
	at app//dac.run(SourceFile:41)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
ForkJoinPool.commonPool-worker-11: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1628)
	at [email protected]/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
Signal Dispatcher: 
	at 
WorldGen-Worker-1: 
	at java.base/java.lang.Thread.getStackTrace(Thread.java:1606)
	at boo.a(SourceFile:40)
	at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:195)
	at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177)
	at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1603)
	at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484)
	at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474)
	at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:578)
	at boo.b(SourceFile:41)
	at boo.a(SourceFile:109)
	at boi.a(SourceFile:44)
	at bop.a(SourceFile:181)
	at bpt.d(SourceFile:121)
	at bnw.c(SourceFile:145)
	at boa.a(SourceFile:119)
	at boa.i(SourceFile:37)
	at boa.a(SourceFile:200)
	at ty.a(SourceFile:457)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
	at java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:479)
	at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
	at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
	at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
	at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
	at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177)
Netty Server IO #0: 
	at [email protected]/sun.nio.ch.EPoll.wait(Native Method)
	at [email protected]/sun.nio.ch.EPollSelectorImpl.doSelect(EPollSelectorImpl.java:120)
	at [email protected]/sun.nio.ch.SelectorImpl.lockAndDoSelect(SelectorImpl.java:124)
	at [email protected]/sun.nio.ch.SelectorImpl.select(SelectorImpl.java:136)
	at app//io.netty.channel.nio.NioEventLoop.select(NioEventLoop.java:756)
	at app//io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:411)
	at app//io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Snooper Timer: 
	at [email protected]/java.lang.Object.wait(Native Method)
	at [email protected]/java.lang.Object.wait(Object.java:328)
	at [email protected]/java.util.TimerThread.mainLoop(Timer.java:527)
	at [email protected]/java.util.TimerThread.run(Timer.java:506)
Client thread: 
	at app//it.unimi.dsi.fastutil.longs.Long2ObjectFunctions$SynchronizedFunction.get(Long2ObjectFunctions.java:241)
	at app//cuv.b(SourceFile:64)
	at app//cuv.a(SourceFile:29)
	at app//aza.a(SourceFile:260)
	at app//aza.c(SourceFile:255)
	at app//daf.a(SourceFile:81)
	at app//daf.b(SourceFile:93)
	at app//cxu.a(SourceFile:914)
	at app//cxq.b(SourceFile:944)
	at app//cxq.a(SourceFile:878)
	at app//cxq.a(SourceFile:752)
	at app//cjk.c(SourceFile:817)
	at app//cjk.a(SourceFile:380)
	at app//net.minecraft.client.main.Main.main(SourceFile:144)
Chunk Batcher 0: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:547)
	at app//dab.d(SourceFile:170)
	at app//dac.run(SourceFile:41)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Common-Cleaner: 
	at [email protected]/java.lang.Object.wait(Native Method)
	at [email protected]/java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:155)
	at [email protected]/jdk.internal.ref.CleanerImpl.run(CleanerImpl.java:148)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
	at [email protected]/jdk.internal.misc.InnocuousThread.run(InnocuousThread.java:134)
Chunk Batcher 6: 
	at [email protected]/jdk.internal.misc.Unsafe.park(Native Method)
	at [email protected]/java.util.concurrent.locks.LockSupport.park(LockSupport.java:194)
	at [email protected]/java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2081)
	at [email protected]/java.util.concurrent.PriorityBlockingQueue.take(PriorityBlockingQueue.java:547)
	at app//dab.d(SourceFile:170)
	at app//dac.run(SourceFile:41)
	at [email protected]/java.lang.Thread.run(Thread.java:834)
Stacktrace:
	at boo.b(SourceFile:42)
	at boo.a(SourceFile:109)
	at boi.a(SourceFile:44)
	at bop.a(SourceFile:181)
	at bpt.d(SourceFile:121)
	at bnw.c(SourceFile:145)
	at boa.a(SourceFile:119)
	at boa.i(SourceFile:37)
	at boa.a(SourceFile:200)

-- Chunk to be generated --
Details:
	Location: 41,-63
	Position hash: -270582939607
	Generator: bpt@14988aad
Stacktrace:
	at ty.a(SourceFile:457)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
	at java.base/java.util.concurrent.CompletableFuture$Completion.exec(CompletableFuture.java:479)

-- Affected level --
Details:
	Level name: Qiba
	All players: 1 total; [ub['Xakep_SDK'/298, l='Qiba', x=-326.26, y=112.89, z=-555.76]]
	Chunk stats: ServerChunkCache: 8339
	Level seed: 1112656407260418052
	Level generator: ID 00 - default, ver 1. Features enabled: true
	Level generator options: {}
	Level spawn location: World: (240,70,48), Chunk: (at 0,4,0 in 15,3; contains blocks 240,0,48 to 255,255,63), Region: (0,0; contains chunks 0,0 to 31,31, blocks 0,0,0 to 511,255,511)
	Level time: 19275 game time, 30325 day time
	Level dimension: 0
	Level storage version: 0x04ABD - Anvil
	Level weather: Rain time: 105279 (now: false), thunder time: 13975 (now: false)
	Level game mode: Game mode: creative (ID 1). Hardcore: false. Cheats: true
Stacktrace:
	at net.minecraft.server.MinecraftServer.b(SourceFile:733)
	at net.minecraft.server.MinecraftServer.a(SourceFile:664)
	at djq.a(SourceFile:125)
	at net.minecraft.server.MinecraftServer.run(SourceFile:568)
	at java.base/java.lang.Thread.run(Thread.java:834)

-- System Details --
Details:
	Minecraft Version: 18w43c
	Operating System: Linux (amd64) version 4.18.16-arch1-1-ARCH
	Java Version: 11.0.1, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 701881928 bytes (669 MB) / 4294967296 bytes (4096 MB) up to 8589934592 bytes (8192 MB)
	JVM Flags: 2 total; -Xmx8G -Xms4G
	Profiler Position: N/A (disabled)
	Player Count: 1 / 8; [ub['Xakep_SDK'/298, l='Qiba', x=-326.26, y=112.89, z=-555.76]]
	Data Packs: vanilla
	Type: Integrated Server (map_client.txt)
	Is Modded: Probably not. Jar signature remains and both client + server brands are untouched.