Equipment Packet Fix

A simple 1.20.1 forge mod that fixes a weird itemstack encoding issue in ClientboundSetEquipmentPacket causing clients to be kicked.

257 Downloads

forgeoptimizationutility

Rent Server with this Mod

Screenshots

About this Mod

Equipment Packet Fix

Mixes into CompoundTag to do two things:

Avoid a ConcurrentModificationException in CompoundTag#write by converting the tag's key set into an array before iterating
Avoid a EncoderException (caused by NullFointerException) in CompoundTag#writeNamedTag by adding a null safeguard

Config

detectExceptions - (default false) Try and log when exceptions might happen, logging the CompoundTag in question

Modpacks

Free to use in modpacks, but please do not redistribute. Also, you should only need to install this on the server, but it doesn't hurt to have it in the client pack as well.

Credits

Logo textures from Minecraft (armor) and Minecraft Dungeons (hammer). Disconnect screenshot from reddit

Available Versions

[1.20.1] Equipment Packet Fix - 1.0.0release

MC 1.20.1forge

November 22, 2025

How to Install Equipment Packet Fix on Your Server

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.20.1).

Install Mod

Open the mod browser in the dashboard and search for "Equipment Packet Fix". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forge

Minecraft Versions

1.20.1

Server-side

✓ Required

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Equipment Packet Fix server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.20.1). You can switch loaders with one click in the panel.

Is Equipment Packet Fix compatible with forge?

Equipment Packet Fix officially supports forge for Minecraft 1.20.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Equipment Packet Fix – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Equipment Packet Fix consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.