Description: Accessing LegacyRandomSource from multiple threads

java.lang.IllegalStateException: Accessing LegacyRandomSource from multiple threads

    at net.minecraft.util.ThreadingDetector.makeThreadingException(ThreadingDetector.java:79)

    at net.minecraft.world.level.levelgen.LegacyRandomSource.next(LegacyRandomSource.java:45)

    at net.minecraft.world.level.levelgen.BitRandomSource.nextInt(BitRandomSource.java:21)

    at net.minecraft.world.level.NaturalSpawner.getRandomPosWithin(NaturalSpawner.java:422)

    at net.minecraft.world.level.NaturalSpawner.spawnCategoryForChunk(NaturalSpawner.java:211)

    at net.minecraft.world.level.NaturalSpawner.spawnForChunk(NaturalSpawner.java:184)

    at net.minecraft.server.level.ServerChunkCache.tickChunks(ServerChunkCache.java:765)

    at net.minecraft.server.level.ServerChunkCache.tick(ServerChunkCache.java:649)

    at net.minecraft.server.level.ServerLevel.tick(ServerLevel.java:686)

    at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1546)

    at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:447)

    at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1397)

    at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1174)

    at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:320)

    at java.base/java.lang.Thread.run(Thread.java:833)

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

---------------------------------------------------------------------------------------

-- Head --

Thread: Server thread

Stacktrace:

    at net.minecraft.util.ThreadingDetector.makeThreadingException(ThreadingDetector.java:79)

    at net.minecraft.world.level.levelgen.LegacyRandomSource.next(LegacyRandomSource.java:45)

    at net.minecraft.world.level.levelgen.BitRandomSource.nextInt(BitRandomSource.java:21)

    at net.minecraft.world.level.NaturalSpawner.getRandomPosWithin(NaturalSpawner.java:422)

    at net.minecraft.world.level.NaturalSpawner.spawnCategoryForChunk(NaturalSpawner.java:211)

    at net.minecraft.world.level.NaturalSpawner.spawnForChunk(NaturalSpawner.java:184)

    at net.minecraft.server.level.ServerChunkCache.tickChunks(ServerChunkCache.java:765)

    at net.minecraft.server.level.ServerChunkCache.tick(ServerChunkCache.java:649)

    at net.minecraft.server.level.ServerLevel.tick(ServerLevel.java:686)

-- Thread dumps --

Details:

    Thread dumps: Server thread: 

    at java.base/java.lang.Thread.getStackTrace(Thread.java:1610)

    at net.minecraft.util.ThreadingDetector.a(ThreadingDetector.java:87)

    at java.base/java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197)

    at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179)

    at java.base/java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992)

    at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)

    at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)

    at java.base/java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:921)

    at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)

    at java.base/java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:682)

    at net.minecraft.util.ThreadingDetector.a(ThreadingDetector.java:77)

    at net.minecraft.world.level.levelgen.LegacyRandomSource.c(LegacyRandomSource.java:45)

    at net.minecraft.world.level.levelgen.BitRandomSource.a(BitRandomSource.java:21)

    at net.minecraft.world.level.SpawnerCreature.a(SpawnerCreature.java:422)

    at net.minecraft.world.level.SpawnerCreature.spawnCategoryForChunk(SpawnerCreature.java:211)

    at net.minecraft.world.level.SpawnerCreature.a(SpawnerCreature.java:184)

    at net.minecraft.server.level.ChunkProviderServer.t(ChunkProviderServer.java:765)

    at net.minecraft.server.level.ChunkProviderServer.a(ChunkProviderServer.java:649)

    at net.minecraft.server.level.WorldServer.a(WorldServer.java:686)

    at net.minecraft.server.MinecraftServer.b(MinecraftServer.java:1546)

    at net.minecraft.server.dedicated.DedicatedServer.b(DedicatedServer.java:447)

    at net.minecraft.server.MinecraftServer.a(MinecraftServer.java:1397)

    at net.minecraft.server.MinecraftServer.w(MinecraftServer.java:1174)

    at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:320)

    at java.base/java.lang.Thread.run(Thread.java:833)

Stacktrace:

    at net.minecraft.util.ThreadingDetector.makeThreadingException(ThreadingDetector.java:79)

    at net.minecraft.world.level.levelgen.LegacyRandomSource.next(LegacyRandomSource.java:45)

    at net.minecraft.world.level.levelgen.BitRandomSource.nextInt(BitRandomSource.java:21)

    at net.minecraft.world.level.NaturalSpawner.getRandomPosWithin(NaturalSpawner.java:422)

    at net.minecraft.world.level.NaturalSpawner.spawnCategoryForChunk(NaturalSpawner.java:211)

    at net.minecraft.world.level.NaturalSpawner.spawnForChunk(NaturalSpawner.java:184)

    at net.minecraft.server.level.ServerChunkCache.tickChunks(ServerChunkCache.java:765)

    at net.minecraft.server.level.ServerChunkCache.tick(ServerChunkCache.java:649)

    at net.minecraft.server.level.ServerLevel.tick(ServerLevel.java:686)

    at net.minecraft.server.MinecraftServer.tickChildren(MinecraftServer.java:1546)

    at net.minecraft.server.dedicated.DedicatedServer.tickChildren(DedicatedServer.java:447)

    at net.minecraft.server.MinecraftServer.tickServer(MinecraftServer.java:1397)

    at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1174)

    at net.minecraft.server.MinecraftServer.lambda$spin$0(MinecraftServer.java:320)

    at java.base/java.lang.Thread.run(Thread.java:833)

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