Mod initialization issue - onInitialize() not fully executing

[BjornKennethHolmstrom]

Description

Hello Fabric community,

I'm developing a mod called "Ahimsa" for Minecraft 1.21.1 using Fabric, and I'm encountering an unusual issue with mod initialization. I hope someone can provide some insight or guidance. I am in particular trying to add a custom recipe for charcoal and coal, making black dye craftable from these two items.

Issue description:

• The mod appears to load partially, as I see the initial "Hello Fabric world!" log message.
• However, the rest of the onInitialize() method doesn't seem to execute, or at least doesn't log any messages.
• No error messages are displayed in the console.

Environment details:

• Minecraft version: 1.21.1
• Fabric Loader version: 0.16.2
• Fabric API version: 0.102.1+1.21.1
• Java version: 22
• IDE: IntelliJ IDEA 2024.2.0.1 (Community Edition)
  More info from the IDE:
  Build #IC-242.20224.387, built on August 13, 2024
  Runtime version: 21.0.3+13-b509.4 amd64 (JCEF 122.1.9)
  VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
  Toolkit: sun.awt.X11.XToolkit
  Linux 5.15.0-119-generic
  GC: G1 Young Generation, G1 Concurrent GC, G1 Old Generation
  Memory: 4002M
  Cores: 16
  Registry:
  ide.experimental.ui=true
  Non-Bundled Plugins:
  com.demonwav.minecraft-dev (2024.2-1.8.1)
  Kotlin: 242.20224.387-IJ
  Current Desktop: X-Cinnamon

What I've tried:

1. Added extensive logging throughout the onInitialize() method.
2. Checked that the fabric.mod.json file correctly references the main class.
3. Verified that recipe JSON files are in the correct location.
4. Cleaned and rebuilt the project multiple times.
5. Attempted to use System.out.println() for direct console output.
6. Wrapped the entire onInitialize() method in a try-catch block to catch any potential exceptions.

Here is the main mod class:

package com.bjornkenneth.ahimsa;

import net.fabricmc.api.ModInitializer;
import net.minecraft.util.Identifier;
import net.minecraft.recipe.RecipeManager;
import net.minecraft.server.MinecraftServer;
import net.fabricmc.fabric.api.event.lifecycle.v1.ServerLifecycleEvents;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.InputStream;
import java.nio.charset.StandardCharsets;

public class Ahimsa implements ModInitializer {
	public static final String MOD_ID = "ahimsa";
	public static final Logger LOGGER = LoggerFactory.getLogger(MOD_ID);

	@Override
	public void onInitialize() {
		try {
			System.out.println("Ahimsa mod: onInitialize started");
			LOGGER.info("Ahimsa mod: onInitialize started");

			try {
				LOGGER.info("Ahimsa mod: Attempting to read recipe files");
				printRecipeFileContents("black_dye_from_coal.json");
				printRecipeFileContents("black_dye_from_charcoal.json");
			} catch (Exception e) {
				LOGGER.error("Ahimsa mod: Error during initialization", e);
			}

			LOGGER.info("Ahimsa mod: Registering server started event");
			ServerLifecycleEvents.SERVER_STARTED.register(this::onServerStarted);

			LOGGER.info("Ahimsa mod: onInitialize completed");
		} catch (Exception e) {
			System.err.println("Ahimsa mod: Error in onInitialize");
			e.printStackTrace();
		}

	}

	private void onServerStarted(MinecraftServer server) {
		LOGGER.info("Ahimsa mod: Server started, checking recipes");
		checkRecipe(server, "black_dye_from_coal");
		checkRecipe(server, "black_dye_from_charcoal");
		logAllRecipes(server);
	}

	private void checkRecipe(MinecraftServer server, String recipeName) {
		LOGGER.info("Ahimsa mod: Checking recipe: {}", recipeName);
		Identifier recipeId = Identifier.of(MOD_ID, recipeName);
		RecipeManager recipeManager = server.getRecipeManager();

		if (recipeManager.get(recipeId).isPresent()) {
			LOGGER.info("Ahimsa mod: Recipe '{}' is registered successfully", recipeName);
		} else {
			LOGGER.warn("Ahimsa mod: Recipe '{}' is not found in the recipe manager", recipeName);
		}
	}

	private void logAllRecipes(MinecraftServer server) {
		LOGGER.info("Ahimsa mod: Logging all loaded recipes:");
		RecipeManager recipeManager = server.getRecipeManager();
		recipeManager.keys().forEach(id -> {
			LOGGER.info("Ahimsa mod: Recipe: {}", id);
		});
	}

	private void printRecipeFileContents(String fileName) {
		LOGGER.info("Ahimsa mod: Attempting to read file: {}", fileName);
		try {
			String resourcePath = "data/" + MOD_ID + "/recipes/" + fileName;
			InputStream inputStream = getClass().getClassLoader().getResourceAsStream(resourcePath);

			if (inputStream == null) {
				LOGGER.error("Ahimsa mod: Could not find resource: {}", resourcePath);
				return;
			}

			String content = new String(inputStream.readAllBytes(), StandardCharsets.UTF_8);
			LOGGER.info("Ahimsa mod: Contents of {}: {}", fileName, content);
		} catch (Exception e) {
			LOGGER.error("Ahimsa mod: Error reading recipe file: " + fileName, e);
		}
	}
}

Questions:

1. Are there any known issues with Fabric Loader or Gradle that might cause this behavior?
2. Are there any additional debugging steps you'd recommend?
3. Could this be related to a specific Fabric API or Minecraft 1.21.1 peculiarity?

Any insights or suggestions would be greatly appreciated. Thank you for your time and assistance!

Best regards,
Björn K. Holmström

[Linguardium]

1. nope
2. Breakpoints
3. nope

[Daomephsta]

"Simplifying" your code here isn't helpful. It means the only thing we can tell you is that your entrypoints are valid and should run (which they do).
The problem is likely with the code you have omitted.