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BlueMap crashes server on Forge MDK

See original GitHub issue

Just like discussed on discord it seems that BlueMap is not functional in the Forge MDK, which is setting up a mapped/deobfuscated development environment. The server always crashes with a NoSuchMethodError referencing an unmapped/obfuscated method making running BlueMap in the standard development environment for Forge impossible.

This makes the development of a 3rd party extension for BlueMap on Forge very difficult. I probably wont bother with it anymore. Just leaving the issue here for visibility.

What i did / Steps to reproduce

  • Download latest Forge MDK for MC 1.16
  • Import in IntelliJ as Gradle project
  • run “gradle genIntellijRuns”
  • Download latest Forge 1.16 build of BlueMap (currently BlueMap-1.5.2-forge-1.16.4.jar)
  • Move downloaded JAR file into the IntelliJ project in run/mods
  • Set eula=true in run/eula.txt
  • Launch runServer

Expected result

Server starts, accepts connections from MC and also from a web browser accessing localhost:8100.

Actual result

Server crashes and stops with a Stacktrace in console and run/logs/latest.log:

java.lang.NoSuchMethodError: net.minecraft.server.MinecraftServer.func_195571_aL()Lnet/minecraft/command/Commands;
    at de.bluecolored.bluemap.forge.ForgeMod.onServerStarting( ~[bluemap:?] {re:classloading}
    at net.minecraftforge.eventbus.ASMEventHandler_135_ForgeMod_onServerStarting_FMLServerStartingEvent.invoke(.dynamic) ~[?:?] {}
    at net.minecraftforge.eventbus.ASMEventHandler.invoke( ~[eventbus-4.0.0.jar:?] {}
    at ~[eventbus-4.0.0.jar:?] {}
    at ~[eventbus-4.0.0.jar:?] {}
    at net.minecraftforge.fml.server.ServerLifecycleHooks.handleServerStarting( ~[forge:?] {re:classloading}
    at net.minecraft.server.integrated.IntegratedServer.init( ~[forge:?] {re:classloading,pl:runtimedistcleaner:A}
    at net.minecraft.server.MinecraftServer.func_240802_v_( ~[forge:?] {re:classloading,pl:accesstransformer:B}
    at net.minecraft.server.MinecraftServer.lambda$startServer$0( ~[forge:?] {re:classloading,pl:accesstransformer:B}
    at [?:1.8.0_292] {}


Minecraft: 1.16.5

Forge: 36.1.25

BlueMap Version: 1.5.2-forge-1.16.4

Issue Analytics

  • State:closed
  • Created 2 years ago
  • Comments:12 (6 by maintainers)

github_iconTop GitHub Comments

TBlueFcommented, Jun 8, 2021

@fk4dbad Yes, using fg.deobf( with files( will not deobfuscate the .jar, there is a warning about this in the build log ^^

syorito-hatsukicommented, Jul 25, 2022

Soo… FabricAPI 1.19 contains fabric-command-api-v2. And mod trying to find Caused by: java.lang.ClassNotFoundException: net.fabricmc.fabric.api.command.v1.CommandRegistrationCallback at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(

So maybe good updated libs in fabric build from V1 to V2
Read more comments on GitHub >

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