[18:20:10.009] [Client thread/INFO]: Preparing spawn area: 0%
[18:20:10.199] [Client thread/INFO]: Preparing spawn area: 0%
[18:20:10.229] [Client thread/INFO]: Preparing spawn area: 0%
[18:20:12.195] [Server thread/ERROR]: Exception loading structure piece with id minecraft:nvi
java.util.ConcurrentModificationException: null
	at java.util.HashMap.computeIfAbsent(HashMap.java:1134) ~[?:?]
	at cje.b(SourceFile:67) ~[1.14.jar:?]
	at cje.a(SourceFile:57) ~[1.14.jar:?]
	at cff.a(SourceFile:98) ~[1.14.jar:?]
	at cie.<init>(SourceFile:49) ~[1.14.jar:?]
	at cet$a.<init>(SourceFile:34) ~[1.14.jar:?]
	at cii.a(SourceFile:83) ~[1.14.jar:?]
	at bxv.a(SourceFile:451) ~[1.14.jar:?]
	at bxv.a(SourceFile:170) ~[1.14.jar:?]
	at us.i(SourceFile:426) ~[1.14.jar:?]
	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700) [?:?]
	at agh.h(SourceFile:135) [1.14.jar:?]
	at agh.p(SourceFile:114) [1.14.jar:?]
	at ve$a.p(SourceFile:438) [1.14.jar:?]
	at ve.d(SourceFile:194) [1.14.jar:?]
	at net.minecraft.server.MinecraftServer.aW(SourceFile:708) [1.14.jar:?]
	at net.minecraft.server.MinecraftServer.p(SourceFile:696) [1.14.jar:?]
	at agh.c(SourceFile:123) [1.14.jar:?]
	at net.minecraft.server.MinecraftServer.o(SourceFile:681) [1.14.jar:?]
	at net.minecraft.server.MinecraftServer.a(SourceFile:470) [1.14.jar:?]
	at dxh.a(SourceFile:88) [1.14.jar:?]
	at dxh.d(SourceFile:104) [1.14.jar:?]
	at net.minecraft.server.MinecraftServer.run(SourceFile:605) [1.14.jar:?]
	at java.lang.Thread.run(Thread.java:834) [?:?]
[18:20:12.402] [Client thread/INFO]: Preparing spawn area: 0%
[18:20:12.436] [Client thread/INFO]: Preparing spawn area: 0%
[18:20:12.476] [Client thread/INFO]: Preparing spawn area: 0%
[18:20:12.505] [Client thread/INFO]: Preparing spawn area: 0%
[18:20:12.928] [Client thread/INFO]: Preparing spawn area: 0%
[18:20:13.244] [Client thread/INFO]: Preparing spawn area: 0%
---- Minecraft Crash Report ----
// Don't be sad, have a hug! <3

Time: 26/04/2019, 18:20
Description: Exception generating new chunk

java.util.ConcurrentModificationException
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
	at cje.b(SourceFile:67)
	at cje.a(SourceFile:57)
	at cff.a(SourceFile:98)
	at cfi.a(SourceFile:86)
	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
	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$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
	at cfi.a(SourceFile:86)
	at cfd$c.a(SourceFile:175)
	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
	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$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
	at cfd$c.a(SourceFile:176)
	at cfd$c.<init>(SourceFile:98)
	at cfd.a(SourceFile:280)
	at cet.a(SourceFile:25)
	at ces$a.a(SourceFile:89)
	at bwy.a(SourceFile:187)
	at bxc.d(SourceFile:44)
	at bxc.a(SourceFile:199)
	at us.a(SourceFile:461)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at us.a(SourceFile:455)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
	at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
	at uu.b(SourceFile:57)
	at agk.e(SourceFile:83)
	at agk.a(SourceFile:123)
	at agk.run(SourceFile:91)
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426)
	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-Worker-2
Stacktrace:
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
	at cje.b(SourceFile:67)
	at cje.a(SourceFile:57)
	at cff.a(SourceFile:98)
	at cfi.a(SourceFile:86)
	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
	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$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
	at cfi.a(SourceFile:86)
	at cfd$c.a(SourceFile:175)
	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
	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$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
	at cfd$c.a(SourceFile:176)
	at cfd$c.<init>(SourceFile:98)
	at cfd.a(SourceFile:280)
	at cet.a(SourceFile:25)
	at ces$a.a(SourceFile:89)
	at bwy.a(SourceFile:187)
	at bxc.d(SourceFile:44)
	at bxc.a(SourceFile:199)

-- Chunk to be generated --
Details:
	Location: -17,-14
	Position hash: -55834574865
	Generator: byo@7a1b37cc
Stacktrace:
	at us.a(SourceFile:461)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at us.a(SourceFile:455)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
	at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
	at uu.b(SourceFile:57)
	at agk.e(SourceFile:83)
	at agk.a(SourceFile:123)
	at agk.run(SourceFile:91)
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426)
	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)

-- System Details --
Details:
	Minecraft Version: 1.14
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 11.0.2, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 482156544 bytes (459 MB) / 1250951168 bytes (1193 MB) up to 4294967296 bytes (4096 MB)
	JVM Flags: 2 total; -Xmx4G -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump
2019-04-26 18:20:14,563 Server-Worker-4 WARN Unable to register Log4j shutdown hook because JVM is shutting down. Using SimpleLogger
---- Minecraft Crash Report ----
// Uh... Did I do that?

Time: 26/04/2019, 18:20
Description: Exception generating new chunk

java.util.ConcurrentModificationException
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
	at cje.b(SourceFile:67)
	at cje.a(SourceFile:57)
	at cff.a(SourceFile:98)
	at cfi.a(SourceFile:86)
	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
	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$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
	at cfi.a(SourceFile:86)
	at cfd$c.a(SourceFile:175)
	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
	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$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
	at cfd$c.a(SourceFile:176)
	at cfd$c.<init>(SourceFile:98)
	at cfd.a(SourceFile:280)
	at cet.a(SourceFile:25)
	at ces$a.a(SourceFile:89)
	at bwy.a(SourceFile:187)
	at bxc.d(SourceFile:44)
	at bxc.a(SourceFile:199)
	at us.a(SourceFile:461)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at us.a(SourceFile:455)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
	at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
	at uu.b(SourceFile:57)
	at agk.e(SourceFile:83)
	at agk.a(SourceFile:123)
	at agk.run(SourceFile:91)
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426)
	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-Worker-3
Stacktrace:
	at java.base/java.util.HashMap.computeIfAbsent(HashMap.java:1134)
	at cje.b(SourceFile:67)
	at cje.a(SourceFile:57)
	at cff.a(SourceFile:98)
	at cfi.a(SourceFile:86)
	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
	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$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
	at cfi.a(SourceFile:86)
	at cfd$c.a(SourceFile:175)
	at java.base/java.util.stream.ReferencePipeline$4$1.accept(ReferencePipeline.java:212)
	at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1654)
	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$ReduceOp.evaluateSequential(ReduceOps.java:913)
	at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.base/java.util.stream.IntPipeline.reduce(IntPipeline.java:496)
	at java.base/java.util.stream.IntPipeline.max(IntPipeline.java:459)
	at cfd$c.a(SourceFile:176)
	at cfd$c.<init>(SourceFile:98)
	at cfd.a(SourceFile:280)
	at cet.a(SourceFile:25)
	at ces$a.a(SourceFile:89)
	at bwy.a(SourceFile:187)
	at bxc.d(SourceFile:44)
	at bxc.a(SourceFile:199)

-- Chunk to be generated --
Details:
	Location: -17,-14
	Position hash: -55834574865
	Generator: byo@7a1b37cc
Stacktrace:
	at us.a(SourceFile:461)
	at com.mojang.datafixers.util.Either$Left.map(Either.java:38)
	at us.a(SourceFile:455)
	at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1072)
	at java.base/java.util.concurrent.CompletableFuture$Completion.run(CompletableFuture.java:478)
	at uu.b(SourceFile:57)
	at agk.e(SourceFile:83)
	at agk.a(SourceFile:123)
	at agk.run(SourceFile:91)
	at java.base/java.util.concurrent.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1426)
	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)

-- System Details --
Details:
	Minecraft Version: 1.14
	Operating System: Windows 10 (amd64) version 10.0
	Java Version: 11.0.2, Oracle Corporation
	Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 482156544 bytes (459 MB) / 1250951168 bytes (1193 MB) up to 4294967296 bytes (4096 MB)
	JVM Flags: 2 total; -Xmx4G -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump