[Nukkit 2.0] Player join issue

[Alemiz112]

This happens when player tries to join server.

[ForkJoinPool-1-worker-2] WARN  - Unable to load chunk (2, 3) in level world 
java.util.concurrent.CompletionException: java.lang.IllegalArgumentException: Palette contains same block state twice!
	at java.util.concurrent.CompletableFuture.encodeThrowable(Unknown Source) ~[?:?]
	at java.util.concurrent.CompletableFuture.completeThrowable(Unknown Source) [?:?]
	at java.util.concurrent.CompletableFuture$AsyncSupply.run(Unknown Source) [?:?]
	at java.util.concurrent.CompletableFuture$AsyncSupply.exec(Unknown Source) [?:?]
	at java.util.concurrent.ForkJoinTask.doExec(Unknown Source) [?:?]
	at java.util.concurrent.ForkJoinPool.runWorker(Unknown Source) [?:?]
	at java.util.concurrent.ForkJoinWorkerThread.run(Unknown Source) [?:?]
Caused by: java.lang.IllegalArgumentException: Palette contains same block state twice!
	at cn.nukkit.level.chunk.BlockStorage.readFromStorage(BlockStorage.java:164) ~[nukkit-2.0-SNAPSHOT.jar:?]
	at cn.nukkit.level.provider.leveldb.serializer.ChunkSectionSerializerV8.deserialize(ChunkSectionSerializerV8.java:32) ~[nukkit-2.0-SNAPSHOT.jar:?]
	at cn.nukkit.level.provider.leveldb.serializer.ChunkSectionSerializers.deserialize(ChunkSectionSerializers.java:28) ~[nukkit-2.0-SNAPSHOT.jar:?]
	at cn.nukkit.level.provider.leveldb.serializer.ChunkSerializerV3.deserialize(ChunkSerializerV3.java:86) ~[nukkit-2.0-SNAPSHOT.jar:?]
	at cn.nukkit.level.provider.leveldb.serializer.ChunkSerializers.deserializeChunk(ChunkSerializers.java:44) ~[nukkit-2.0-SNAPSHOT.jar:?]
	at cn.nukkit.level.provider.leveldb.LevelDBProvider.lambda$readChunk$0(LevelDBProvider.java:71) ~[nukkit-2.0-SNAPSHOT.jar:?]

Full error here.

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[squeeglii]

I also saw this after using MCCToolchest to convert a Java world to a LevelDB world. Was either an issue with conversion or putting a regular MC Bedrock world on there.

Haven't seen that since ^ - Have seen it repeated on regular bedrock worlds added to the server.

[Alemiz112]

In my case I changed from Nukkit 1.0 to Nukkit 2.0 and it tried to do auto-convert.

[ghost]

Hi, I'm having the same issue with my Bedrock world.
The server crashes when a player joins the server.
[WARN ] Unable to load chunk (0, -1) in level world java.util.concurrent.CompletionException: java.lang.IllegalArgumentException: Unsupported chunk version (flattened) at java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314) ~[?:?] at java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319) ~[?:?] at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1702) ~[?:?] at java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1692) ~[?:?] at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290) ~[?:?] at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020) ~[?:?] at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656) ~[?:?] at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594) ~[?:?] at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:177) ~[?:?] Caused by: java.lang.IllegalArgumentException: Unsupported chunk version (flattened) at com.google.common.base.Preconditions.checkArgument(Preconditions.java:122) ~[Nukkit.jar:?] at cn.nukkit.level.chunk.BlockStorage.readFromStorage(BlockStorage.java:164) ~[Nukkit.jar:?] at cn.nukkit.level.provider.leveldb.serializer.ChunkSectionSerializerV8.deserialize(ChunkSectionSerializerV8.java:32) ~[Nukkit.jar:?] at cn.nukkit.level.provider.leveldb.serializer.ChunkSectionSerializers.deserialize(ChunkSectionSerializers.java:28) ~[Nukkit.jar:?] at cn.nukkit.level.provider.leveldb.serializer.ChunkSerializerV3.deserialize(ChunkSerializerV3.java:86) ~[Nukkit.jar:?] at cn.nukkit.level.provider.leveldb.serializer.ChunkSerializers.deserializeChunk(ChunkSerializers.java:44) ~[Nukkit.jar:?] at cn.nukkit.level.provider.leveldb.LevelDBProvider.lambda$readChunk$0(LevelDBProvider.java:79) ~[Nukkit.jar:?] at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1700) ~[?:?] ... 6 more
Full error here

[SupremeMortal]

@Etyoppp
Unsupported chunk version (flattened)
You are running a world unsupported by Nukkit

[ghost]

Why would it be unsupported ? It is a normal world generated normally

[popkechupki]

Nukkit2.0 support LevelDB but it is up to 1.11 now. So you can’t load Bedrock 1.12+ worlds yet. Maybe that’s why you are said “Unsupported chunk version”.