Server Crashing on Start When Mods Added?

Server Discussion
1

When ever I start my Sponge Server with mods installed, it crashes. I tried importing a mod I made and it keeps giving me this crash log:

---- Minecraft Crash Report ----

WARNING: coremods are present:
SpongeCoremod (spongeforge-1.8.9-1763-4.1.0-BETA-1207.jar)
Contact their authors BEFORE contacting forge

// Everything’s going to plan. No, really, that was supposed to happen.

Time: 3/14/16 6:28 PM
Description: Exception in server tick loop

net.minecraftforge.fml.common.LoaderException: java.lang.NoClassDefFoundError: net/minecraft/client/renderer/entity/Render
at net.minecraftforge.fml.common.LoadController.transition(LoadController.java:162)
at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:543)
at net.minecraftforge.fml.server.FMLServerHandler.beginServerLoading(FMLServerHandler.java:87)
at net.minecraftforge.fml.common.FMLCommonHandler.onServerStart(FMLCommonHandler.java:320)
at net.minecraft.server.dedicated.DedicatedServer.func_71197_b(DedicatedServer.java:112)
at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:441)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/client/renderer/entity/Render
at mod.mcreator.SupremeMod.(SupremeMod.java:114)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at java.lang.Class.newInstance(Unknown Source)
at net.minecraftforge.fml.common.ILanguageAdapter$JavaAdapter.getNewInstance(ILanguageAdapter.java:174)
at net.minecraftforge.fml.common.FMLModContainer.constructMod(FMLModContainer.java:534)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.sendEventToModContainer(LoadController.java:211)
at net.minecraftforge.fml.common.LoadController.propogateStateMessage(LoadController.java:189)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.common.eventbus.EventSubscriber.handleEvent(EventSubscriber.java:74)
at com.google.common.eventbus.SynchronizedEventSubscriber.handleEvent(SynchronizedEventSubscriber.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:322)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:304)
at com.google.common.eventbus.EventBus.post(EventBus.java:275)
at net.minecraftforge.fml.common.LoadController.redirect$onPost$0(LoadController.java:53)
at net.minecraftforge.fml.common.LoadController.distributeStateMessage(LoadController.java:118)
at net.minecraftforge.fml.common.Loader.loadMods(Loader.java:512)
… 5 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.client.renderer.entity.Render
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
… 36 more
Caused by: java.lang.NullPointerException
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:182)
… 38 more

A detailed walkthrough of the error, its code path and all known details is as follows:

– System Details –
Details:
Minecraft Version: 1.8.9
Operating System: Windows 10 (x86) version 10.0
Java Version: 1.8.0_73, Oracle Corporation
Java VM Version: Java HotSpot™ Client VM (mixed mode), Oracle Corporation
Memory: 166278576 bytes (158 MB) / 343166976 bytes (327 MB) up to 1037959168 bytes (989 MB)
JVM Flags: 1 total; -Xmx1024M
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP 9.19 Powered by Forge 11.15.1.1763 5 mods loaded, 5 mods active
States: ‘U’ = Unloaded ‘L’ = Loaded ‘C’ = Constructed ‘H’ = Pre-initialized ‘I’ = Initialized ‘J’ = Post-initialized ‘A’ = Available ‘D’ = Disabled ‘E’ = Errored
UC mcp{9.19} [Minecraft Coder Pack] (minecraft.jar)
UC FML{8.0.99.99} [Forge Mod Loader] (forge.jar)
UC Forge{11.15.1.1763} [Minecraft Forge] (forge.jar)
UC sponge{1.8.9-1763-4.1.0-BETA-1207} [SpongeForge] (spongeforge-1.8.9-1763-4.1.0-BETA-1207.jar)
UE SupremeMod{b1.4.2} [SupremeMod] (SupremeMod-b1.4.2.jar)
Loaded coremods (and transformers):
SpongeCoremod (spongeforge-1.8.9-1763-4.1.0-BETA-1207.jar)
org.spongepowered.common.launch.transformer.SpongeSuperclassTransformer
Profiler Position: N/A (disabled)
Is Modded: Definitely; Server brand changed to ‘fml,forge,sponge’
Type: Dedicated Server (map_server.txt)

Can someone help?

2

This is a mod error, not a sponge error. Because Sponge is server only, no rendering takes place, and the package net.minecraft.client does not exist. This is exactly what forge proxies are for, so that you only register certain renders while on client side…

Honestly… read your stack traces, according to said stack trace, this line is the offender.

3

Ok, so should I move this to a mod forum or something now?

Sorry, I’m a noob when it comes to this kinda stuff :confused:

4

You could, but it’s not a huge thing, and should be fairly easy to fix, I personally found Mr. Crayfish’s modding tutorials quite helpful and up to date (as of 1.8).

It’s okay. If by “Stuff” you mean Java, or even just stacktraces, I highly suggest you look into tutorials and try some practice projects without any API. I can’t stress enough the importance of understanding OOP concepts and Java convention before using an API (such as forge) which doesn’t necessarily use the same techniques, concepts, or conventions.