1.18.2 - Server crashes on registering ItemProperties

[Sweetmimike]

Hello !

When I try to run a server with my mod, an error occurs and make the server crashes. It seems that the error happens on the client setup and more precisely when I try to register a new ItemProperties.

private void clientSetup(final FMLClientSetupEvent event) {
        MenuScreens.register(MenuManager.MOB_FARM_MENU.get(), MobFarmScreen::new);

        ItemBlockRenderTypes.setRenderLayer(BlockManager.IRON_MOB_FARM.get(), RenderType.cutout());
        ItemBlockRenderTypes.setRenderLayer(BlockManager.GOLD_MOB_FARM.get(), RenderType.cutout());
        ItemBlockRenderTypes.setRenderLayer(BlockManager.DIAMOND_MOB_FARM.get(), RenderType.cutout());
        ItemBlockRenderTypes.setRenderLayer(BlockManager.EMERALD_MOB_FARM.get(), RenderType.cutout());
        ItemBlockRenderTypes.setRenderLayer(BlockManager.NETHERITE_MOB_FARM.get(), RenderType.cutout());

        event.enqueueWork(() -> {
            ItemProperties.register(ItemManager.MOB_SHARD.get(), new ResourceLocation(PerfectMobFarm.MODID, "completed"), ((pStack, pLevel, pEntity, pSeed) -> {
                CompoundTag nbtData = pStack.getTag();
                if (nbtData != null && nbtData.contains(NbtTagsName.KILLED_COUNT)) {
                    return nbtData.getInt(NbtTagsName.KILLED_COUNT) == CommonConfigs.MOB_SHARD_KILL_NEEDED.get() ? 1.0F : 0.0F;
                }
                return 0.0F;
            }));

            ItemProperties.register(ItemManager.ADVANCED_MOB_SHARD.get(), new ResourceLocation(PerfectMobFarm.MODID, "completed"), ((pStack, pLevel, pEntity, pSeed) -> {
                CompoundTag nbtData = pStack.getTag();
                if (nbtData != null && nbtData.contains(NbtTagsName.KILLED_COUNT)) {
                    return nbtData.getInt(NbtTagsName.KILLED_COUNT) == CommonConfigs.MOB_SHARD_KILL_NEEDED.get() ? 1.0F : 0.0F;
                }
                return 0.0F;
            }));
        });
    }

When I comment the event.enqueueWork block, the server doesn't crash. Just below is the error stack trace.

Spoiler

-- Head --
Thread: main
Stacktrace:
	at net.minecraftforge.fml.loading.RuntimeDistCleaner.processClassWithFlags(RuntimeDistCleaner.java:57) ~[fmlloader-1.18.2-40.1.0.jar%230!/:1.0] {}
-- MOD perfectmobfarm --
Details:
	Caused by 0: java.lang.reflect.InvocationTargetException
		at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] {}
		at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[?:?] {}
		at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?] {}
		at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?] {}
		at java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[?:?] {}
		at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:67) ~[javafmllanguage-1.18.2-40.1.0.jar%2377!/:?] {}
		at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:106) ~[fmlcore-1.18.2-40.1.0.jar%2379!/:?] {}
		at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) ~[?:?] {}
		at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796) ~[?:?] {}
		at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) ~[?:?] {}
		at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) ~[?:?] {}
		at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) ~[?:?] {}
		at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) ~[?:?] {}
		at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) ~[?:?] {}

	Mod File: main
	Failure message: Perfect Mob Farm (perfectmobfarm) has failed to load correctly
		java.lang.reflect.InvocationTargetException: null
	Mod Version: 0.0NONE
	Mod Issue URL: NOT PROVIDED
	Exception message: java.lang.RuntimeException: Attempted to load class net/minecraft/client/multiplayer/ClientLevel for invalid dist DEDICATED_SERVER
Stacktrace:
	at net.minecraftforge.fml.loading.RuntimeDistCleaner.processClassWithFlags(RuntimeDistCleaner.java:57) ~[fmlloader-1.18.2-40.1.0.jar:1.0] {}
	at cpw.mods.modlauncher.LaunchPluginHandler.offerClassNodeToPlugins(LaunchPluginHandler.java:88) ~[modlauncher-9.1.3.jar:?] {}
	at cpw.mods.modlauncher.ClassTransformer.transform(ClassTransformer.java:120) ~[modlauncher-9.1.3.jar:?] {}
	at cpw.mods.modlauncher.TransformingClassLoader.maybeTransformClassBytes(TransformingClassLoader.java:50) ~[modlauncher-9.1.3.jar:?] {}
	at cpw.mods.cl.ModuleClassLoader.readerToClass(ModuleClassLoader.java:110) ~[securejarhandler-1.0.3.jar:?] {}
	at cpw.mods.cl.ModuleClassLoader.lambda$findClass$16(ModuleClassLoader.java:216) ~[securejarhandler-1.0.3.jar:?] {}
	at cpw.mods.cl.ModuleClassLoader.loadFromModule(ModuleClassLoader.java:226) ~[securejarhandler-1.0.3.jar:?] {}
	at cpw.mods.cl.ModuleClassLoader.findClass(ModuleClassLoader.java:216) ~[securejarhandler-1.0.3.jar:?] {}
	at cpw.mods.cl.ModuleClassLoader.loadClass(ModuleClassLoader.java:132) ~[securejarhandler-1.0.3.jar:?] {}
	at java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[?:?] {}
	at java.lang.Class.getDeclaredMethods0(Native Method) ~[?:?] {}
	at java.lang.Class.privateGetDeclaredMethods(Class.java:3402) ~[?:?] {}
	at java.lang.Class.getDeclaredMethod(Class.java:2673) ~[?:?] {}
	at net.minecraftforge.eventbus.EventBus.getDeclMethod(EventBus.java:83) ~[eventbus-5.0.7.jar%239!/:?] {}
	at net.minecraftforge.eventbus.EventBus.lambda$registerObject$4(EventBus.java:95) ~[eventbus-5.0.7.jar%239!/:?] {}
	at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:197) ~[?:?] {}
	at java.util.HashMap$KeySpliterator.tryAdvance(HashMap.java:1728) ~[?:?] {}
	at java.util.stream.ReferencePipeline.forEachWithCancel(ReferencePipeline.java:129) ~[?:?] {}
	at java.util.stream.AbstractPipeline.copyIntoWithCancel(AbstractPipeline.java:527) ~[?:?] {}
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:513) ~[?:?] {}
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?] {}
	at java.util.stream.FindOps$FindOp.evaluateSequential(FindOps.java:150) ~[?:?] {}
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] {}
	at java.util.stream.ReferencePipeline.findFirst(ReferencePipeline.java:647) ~[?:?] {}
	at net.minecraftforge.eventbus.EventBus.lambda$registerObject$7(EventBus.java:97) ~[eventbus-5.0.7.jar%239!/:?] {}
	at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) ~[?:?] {}
	at java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:179) ~[?:?] {}
	at java.util.Spliterators$ArraySpliterator.forEachRemaining(Spliterators.java:992) ~[?:?] {}
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509) ~[?:?] {}
	at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499) ~[?:?] {}
	at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) ~[?:?] {}
	at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) ~[?:?] {}
	at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[?:?] {}
	at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:596) ~[?:?] {}
	at net.minecraftforge.eventbus.EventBus.registerObject(EventBus.java:94) ~[eventbus-5.0.7.jar%239!/:?] {}
	at net.minecraftforge.eventbus.EventBus.register(EventBus.java:120) ~[eventbus-5.0.7.jar%239!/:?] {}
	at com.sweetmimike.perfectmobfarm.PerfectMobFarm.<init>(PerfectMobFarm.java:67) ~[%2380!/:?] {re:classloading}
	at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:?] {}
	at jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:77) ~[?:?] {}
	at jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:?] {}
	at java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:499) ~[?:?] {}
	at java.lang.reflect.Constructor.newInstance(Constructor.java:480) ~[?:?] {}
	at net.minecraftforge.fml.javafmlmod.FMLModContainer.constructMod(FMLModContainer.java:67) ~[javafmllanguage-1.18.2-40.1.0.jar%2377!/:?] {}
	at net.minecraftforge.fml.ModContainer.lambda$buildTransitionHandler$4(ModContainer.java:106) ~[fmlcore-1.18.2-40.1.0.jar%2379!/:?] {}
	at java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) ~[?:?] {}
	at java.util.concurrent.CompletableFuture$AsyncRun.exec(CompletableFuture.java:1796) ~[?:?] {}
	at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:373) ~[?:?] {}
	at java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1182) ~[?:?] {}
	at java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1655) ~[?:?] {}
	at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1622) ~[?:?] {}
	at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:165) ~[?:?] {}

 

 

[warjort]

Quote

Exception message: java.lang.RuntimeException: Attempted to load class net/minecraft/client/multiplayer/ClientLevel for invalid dist DEDICATED_SERVER Stacktrace: at net.minecraftforge.fml.loading.RuntimeDistCleaner.processClassWithFlags(RuntimeDistCleaner.java:57) ~[fmlloader-1.18.2-40.1.0.jar:1.0] {} at 

-- snip --

java.lang.Class.privateGetDeclaredMethods(Class.java:3402) ~[?:?] {} at java.lang.Class.getDeclaredMethod(Class.java:2673) ~[?:?] {} at net.minecraftforge.eventbus.EventBus.getDeclMethod(EventBus.java:83) ~[eventbus-5.0.7.jar%239!/:?] {} at net.minecraftforge.eventbus.EventBus.lambda$registerObject$4(EventBus.java:95) ~[eventbus-5.0.7.jar%239!/:?] {} at

net.minecraftforge.eventbus.EventBus.register(EventBus.java:120) ~[eventbus-5.0.7.jar%239!/:?] {} at

com.sweetmimike.perfectmobfarm.PerfectMobFarm.<init>(PerfectMobFarm.java:67) ~[%2380!/:?] {re:classloading}

This is happening in your constructor when you register with the EventBus.

Forge is examining your class and it is finding a reference to ClientLevel either in one of your fields or method signatures during the classloading. It might not be direct, it could be referencing one of your other classes that needs to load ClientLevel.

Obviously, ClientLevel doesn't exist on the server so it crashes.

The usual way to solve this is to move the field or method to a different class that only gets referenced/loaded from inside your client method.

[Sweetmimike]

Thank you very much !