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Client Mod Installed on Server

The server crashes on startup trying to load a class that only exists on the client. A client-only mod was placed in the server's mods folder, and the server has no client rendering code for it to hook into.

Mit jelent ez a hiba?
Mods declare which 'side' they run on. The error about loading a net/minecraft/client/ class 'for invalid dist DEDICATED_SERVER' means a mod tried to use client-only code on a server that does not have it. The mod simply does not belong on the server. 
Attempted to load class net/minecraft/client/... for invalid dist DEDICATED_SERVER
Leggyakoribb okok
  • A purely client-side mod copied into the server mods folder.
  • A whole client mods folder mirrored onto the server.
  • A mod that renders UI/graphics with no server function.
  • Assuming every mod must be on both sides.
  • A modpack that did not separate client-only mods.
Hogyan diagnosztizálj
  1. Read the crash for the mod whose client class failed to load.
  2. Check that mod's page, client-only mods say so explicitly.
  3. Ask whether the mod does anything server-side at all.
  4. Compare your server mods against a known server-safe list.
Ajánlott megoldások
  • Remove the client mod
    Delete the client-only mod from the server mods folder, keep it only on clients.
  • Split client and server mods
    Maintain separate mod lists: shared gameplay mods on both, client-only mods on clients only.
  • Use the pack's server files
    Most modpacks ship a server-specific mods set, use that on the server.
  • Verify each mod's side
    Before adding a mod to the server, confirm it has server-side functionality.
Naplóm elemzése
Gyakran ismételt kérdések

Its page usually states client-side, and it provides visual/UI features with no server logic (shaders, minimaps, HUDs).

Yes, client-only mods stay on each player's client, they just must not be on the server.

The mod tries to load client rendering classes that do not exist on a dedicated server, which aborts loading.