Forge 1.20.2 Installing Forge, but not loading mods

[Dmellex]

As described in the title my docker server keeps loading the forge version, but when i try joining with my modpack it says that theres differences in the mod list aka the server doesnt have any mods. (I already tested this by joining the server with the forge version only, no mods before.)

Basically i had the server already running on 1.20.1 with pixelmon, but decided i wanted to upgrade to 1.20.2 because it has a newer pixelmon version. But some of the mods in the modpacks dont exist in 1.20.2 so i took those out. The first time i restarted the server, it still loaded the old mods and asked for dependencies despite me removing said mods from the modpack.zip. Eventually got it fixed, but now forge is loading but the modpack isnt. Have tried various things but found no solution. This is the server setup: (I have tried using java 21 and java 17, since i read that different mod versions need either of those two)

services:
  minecraft:
    image: itzg/minecraft-server
    container_name: minecraft_pixelmon
    tty: true
    stdin_open: true
    ports:
      - "25565:25565"
    environment:
      UID: 1001
      GID: 1001
      TYPE: FORGE
      VERSION: "1.20.2"
      FORGE_VERSION: "48.1.0"
      MODPACK: /modzip/modpack.zip
      EULA: "TRUE"
      INIT_MEMORY: 2G
      MAX_MEMORY: 6G
    volumes:
      - /srv/data/minecraft/modzip:/modzip
      - /srv/data/minecraft/config:/data/config
      - /srv/data/minecraft/world:/data/world

  This is the modpack i use:

And here's the server startup logs:

[init] Changing uid of minecraft to 1001
[init] Changing gid of minecraft to 1001
[init] Running as uid=1001 gid=1001 with /data as 'drwxr-x--- 9 1001 1000 4096 Feb 19 17:41 /data'
[init] Resolving type given FORGE
[mc-image-helper] 17:46:41.738 INFO  : Downloading Forge installer 48.1.0 for Minecraft 1.20.2
[mc-image-helper] 17:46:42.109 INFO  : Running Forge 48.1.0 installer for Minecraft 1.20.2. This might take a while...

Archive:  /tmp/modpack.zip
  inflating: /data/mods/modpack/badpackets-forge-0.5.7.jar  
  inflating: /data/mods/modpack/Bookshelf-Forge-1.20.2-21.0.14.jar  
  inflating: /data/mods/modpack/charmofundying-forge-7.0.0+1.20.2.jar  
  inflating: /data/mods/modpack/curios-forge-6.1.0+1.20.2.jar  
  inflating: /data/mods/modpack/EnchantmentDescriptions-Forge-1.20.2-18.0.7.jar  
  inflating: /data/mods/modpack/jei-1.20.2-forge-16.0.0.2.jar  
  inflating: /data/mods/modpack/jmi-forge-1.20.2-1.0-49.jar  
  inflating: /data/mods/modpack/journeymap-1.20.2-5.9.21-forge.jar  
  inflating: /data/mods/modpack/NaturesCompass-1.20.2-1.11.5-forge.jar  
  inflating: /data/mods/modpack/Pixelmon-1.20.2-9.2.10-universal.jar  
  inflating: /data/mods/modpack/SereneSeasons-1.20.2-9.2.0.5.jar  
  inflating: /data/mods/modpack/useful_backpacks-fabric-1.20.2-2.0.1.123.jar  
  inflating: /data/mods/modpack/u_team_core-forge-1.20.2-5.2.0.270.jar  
  inflating: /data/mods/modpack/wthit-forge-9.10.3.jar  
[mc-image-helper] 17:47:03.899 INFO  : Created/updated 1 property in /data/server.properties
[init] Setting initial memory to 2G and max to 6G
[init] Using Forge supplied run.sh script...
[17:47:06] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher running: args [--launchTarget, forge_server, --fml.forgeVersion, 48.1.0, --fml.mcVersion, 1.20.2, --fml.forgeGroup, net.minecraftforge, --fml.mcpVersion, 20230921.100330]
[17:47:06] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: JVM identified as Eclipse Adoptium OpenJDK 64-Bit Server VM 17.0.14+7
[17:47:06] [main/INFO] [cp.mo.mo.Launcher/MODLAUNCHER]: ModLauncher 10.1.1 starting: java version 17.0.14 by Eclipse Adoptium; OS Linux arch amd64 version 6.8.0-53-generic
[17:47:06] [main/INFO] [ne.mi.fm.lo.ImmediateWindowHandler/]: ImmediateWindowProvider not loading because launch target is forge_server
[17:47:06] [main/INFO] [mixin/]: SpongePowered MIXIN Subsystem Version=0.8.5 Source=union:/data/libraries/org/spongepowered/mixin/0.8.5/mixin-0.8.5.jar%2362!/ Service=ModLauncher Env=SERVER
[17:47:06] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file /data/libraries/net/minecraftforge/fmlcore/1.20.2-48.1.0/fmlcore-1.20.2-48.1.0.jar is missing mods.toml file
[17:47:06] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file /data/libraries/net/minecraftforge/javafmllanguage/1.20.2-48.1.0/javafmllanguage-1.20.2-48.1.0.jar is missing mods.toml file
[17:47:06] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file /data/libraries/net/minecraftforge/lowcodelanguage/1.20.2-48.1.0/lowcodelanguage-1.20.2-48.1.0.jar is missing mods.toml file
[17:47:06] [main/WARN] [ne.mi.fm.lo.mo.ModFileParser/LOADING]: Mod file /data/libraries/net/minecraftforge/mclanguage/1.20.2-48.1.0/mclanguage-1.20.2-48.1.0.jar is missing mods.toml file
[17:47:07] [main/INFO] [ne.mi.fm.lo.mo.JarInJarDependencyLocator/]: No dependencies to load found. Skipping!
[17:47:08] [main/INFO] [cp.mo.mo.LaunchServiceHandler/MODLAUNCHER]: Launching target 'forge_server' with arguments []
[17:47:14] [modloading-worker-0/INFO] [ne.mi.co.ForgeMod/FORGEMOD]: Forge mod loading, version 48.1.0, for MC 1.20.2 with MCP 20230921.100330
[17:47:14] [modloading-worker-0/INFO] [ne.mi.co.MinecraftForge/FORGE]: MinecraftForge v48.1.0 Initialized
[17:47:15] [Forge Version Check/INFO] [ne.mi.fm.VersionChecker/]: [forge] Starting version check at https://files.minecraftforge.net/net/minecraftforge/forge/promotions_slim.json
[17:47:15] [Forge Version Check/INFO] [ne.mi.fm.VersionChecker/]: [forge] Found status: UP_TO_DATE Current: 48.1.0 Target: null
[17:47:16] [main/INFO] [mojang/YggdrasilAuthenticationService]: Environment: Environment[accountsHost=https://api.mojang.com, sessionHost=https://sessionserver.mojang.com, servicesHost=https://api.minecraftservices.com, name=PROD]
[17:47:16] [main/WARN] [minecraft/VanillaPackResourcesBuilder]: Assets URL 'union:/data/libraries/net/minecraft/server/1.20.2-20230921.100330/server-1.20.2-20230921.100330-srg.jar%2395!/assets/.mcassetsroot' uses unexpected schema
[17:47:16] [main/WARN] [minecraft/VanillaPackResourcesBuilder]: Assets URL 'union:/data/libraries/net/minecraft/server/1.20.2-20230921.100330/server-1.20.2-20230921.100330-srg.jar%2395!/data/.mcassetsroot' uses unexpected schema
[17:47:18] [main/INFO] [minecraft/RecipeManager]: Loaded 7 recipes
[17:47:18] [main/INFO] [minecraft/AdvancementTree]: Loaded 1271 advancements
[17:47:19] [Server thread/INFO] [minecraft/DedicatedServer]: Starting minecraft server version 1.20.2
[17:47:19] [Server thread/INFO] [minecraft/DedicatedServer]: Loading properties
[17:47:19] [Server thread/INFO] [minecraft/DedicatedServer]: Default game type: SURVIVAL
[17:47:19] [Server thread/INFO] [minecraft/MinecraftServer]: Generating keypair
>....
[17:47:19] [Server thread/INFO] [minecraft/DedicatedServer]: Starting Minecraft server on *:25565
>....
[17:47:19] [Server thread/INFO] [minecraft/ServerConnectionListener]: Using epoll channel type
>....
[17:47:19] [Server thread/INFO] [minecraft/DedicatedServer]: Preparing level "world"
>....
[17:47:20] [Netty Epoll Server IO #1/INFO] [ne.mi.se.ServerLifecycleHooks/SERVERHOOKS]: [/[::1]:55998] Disconnecting VANILLA connection attempt: Server is still starting! Please wait before reconnecting.
>....
[17:47:21] [Server thread/INFO] [minecraft/MinecraftServer]: Preparing start region for dimension minecraft:overworld
>....
[17:47:23] [Worker-Main-8/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 0%
>....
[17:47:23] [Worker-Main-8/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 0%
>....
[17:47:23] [Worker-Main-8/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 0%
>....
[17:47:23] [Worker-Main-8/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 0%
>....
[17:47:23] [Worker-Main-8/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 0%
>....
[17:47:23] [Worker-Main-7/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 0%
>....
[17:47:24] [Worker-Main-2/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 6%
>....
[17:47:24] [Worker-Main-7/INFO] [minecraft/LoggerChunkProgressListener]: Preparing spawn area: 62%
>....
[17:47:24] [Server thread/INFO] [minecraft/LoggerChunkProgressListener]: Time elapsed: 3813 ms
>....
[17:47:24] [Server thread/INFO] [minecraft/DedicatedServer]: Done (5.200s)! For help, type "help"
>....
[17:47:24] [Server thread/INFO] [minecraft/DedicatedServer]: Starting remote control listener
>....
[17:47:24] [Server thread/INFO] [minecraft/GenericThread]: Thread RCON Listener started
>....
[17:47:24] [Server thread/INFO] [minecraft/RconThread]: RCON running on 0.0.0.0:25575
>....
[17:47:24] [LanServerPinger #1/WARN] [minecraft/LanServerPinger]: LanServerPinger: Network is unreachable
>....
[17:47:24] [Server thread/INFO] [ne.mi.se.pe.PermissionAPI/]: Successfully initialized permission handler forge:default_handler

Im not sure about the "missing mods.toml" line, but when searching for the cause online it was mentioned that its totally normal for this to pop up.

[itzg]

The MODPACK approach is fairly manual. It is your responsibility to clean out extraneous files when upgrading. There's also an option to remove old content every time

https://docker-minecraft-server.readthedocs.io/en/latest/mods-and-plugins/#remove-old-modsplugins

However, since you mention Pixelmon, I'm wondering why you're not using the fully automated modpack support of

https://docker-minecraft-server.readthedocs.io/en/latest/types-and-platforms/mod-platforms/modrinth-modpacks/

to install

https://modrinth.com/mod/pixelmon

[Dmellex]

I tried cleaning out the server before setting it up again, deleting all config files. Sadly i didnt know that i could simply remove old mods that way, thanks for the heads up!

I did delete the docker container + image though and set it up again, so the old mods shouldnt be a problem.

As for why im not using modrinth:
I simply havent used it a lot and didnt think of it. I was pretty keen on getting the forge server up and thought it wouldnt be that big of a problem since i already had it running once. It would be interesting to know what the problem is, but i might try setting up a modrinth server.

[itzg]

I told you the "problem" 😀 The MODPACK usage is only automatic enough to unzip the file and that's it. It doesn't know how to selectively upgrade previous files.