Failed to store chunk errors with CCA and Fabric API

[dicedpixels]

Test plan:

Launch an instance:

• fabricloader 0.16.9
• minecraft 1.21.3
• cardinal-components 6.2.0
• fabric-api 0.107.0+1.21.3

Create a single-player world.

Observe the endless Failed to store chunk errors.

Log: iIMwwMC.txt - mclogs

[demkom58]

I experienced same thing on Dedicated server, here is deobfuscated stacktrace:

 [IO-Worker-7/ERROR] (Minecraft) Failed to store chunk [3, -3]
 java.lang.NullPointerException: Cannot invoke "net.minecraft.nbt.Tag.getId()" because "tag" is null
	at knot/net.minecraft.nbt.CompoundTag.writeNamedTag(CompoundTag.java:496) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.nbt.CompoundTag.write(CompoundTag.java:176) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.nbt.NbtIo.writeUnnamedTag(NbtIo.java:368) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.nbt.NbtIo.writeUnnamedTagWithFallback(NbtIo.java:373) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.nbt.NbtIo.write(NbtIo.java:327) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.world.level.chunk.storage.RegionFileStorage.write(RegionFileStorage.java:122) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.world.level.chunk.storage.IOWorker.runStore(IOWorker.java:227) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.world.level.chunk.storage.IOWorker.storePendingChunk(IOWorker.java:216) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.util.thread.StrictQueue$RunnableWithPriority.run(StrictQueue.java:99) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.Util.runNamed(Util.java:287) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.util.thread.AbstractConsecutiveExecutor.pollTask(AbstractConsecutiveExecutor.java:47) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at knot/net.minecraft.util.thread.AbstractConsecutiveExecutor.run(AbstractConsecutiveExecutor.java:55) ~[minecraft-common-7e133586f8-1.21.3-loom.mappings.1_21_3.layered+hash.2198-v2.jar:?]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[?:?]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[?:?]
	at java.base/java.lang.Thread.run(Thread.java:1583) [?:?]

[boyonk913]

To add to this: for me this only happened when CCA was on its own mod. When I included it in my own mod, the problem ceased to exist.

[demkom58]

To add to this: for me this only happened when CCA was on its own mod. When I included it in my own mod, the problem ceased to exist.

I haven't tried to use packaged jar with included dependency, but with just runServer gradle task it still happens.