Disconnect Packet Fix Mod (1.21.7, 1.21.1) – Resolves the MC-271325 Bug

Q: Which mod loaders are supported?

The mod supports Fabric and NeoForge. There is currently no Forge version.

The Disconnect Packet Fix Mod (1.21.7, 1.21.1) is a lightweight utility mod designed to patch a specific but disruptive Minecraft issue: the MC-271325 bug. This bug causes the server console to be flooded with repeated error messages referencing the clientbound/minecraft:disconnect packet usually after a player disconnects unexpectedly.

These exceptions clutter server logs and can potentially degrade server stability, especially on active or large multiplayer servers. This mod quietly eliminates that log spam and improves the server’s performance and clarity.

Available for Fabric and NeoForge, the fix is essential for server admins running Minecraft 1.21.1+ who want cleaner logs and better error visibility.

Features:

Fixes the MC-271325 Bug:
Resolves the root issue causing clientbound/minecraft:disconnect packet errors in the console after player disconnects.
Removes Console Spam:
Prevents endless exception stack traces that flood the logs and make it difficult to spot real issues.
Improves Server Stability:
By silencing unnecessary error noise, server processes run cleaner, crash logs are easier to analyze, and long-term stability is improved.
Server-Side Utility:
Designed primarily for use on multiplayer servers, though it can be used in singleplayer instances if needed.
Lightweight & Loader-Compatible:
Supports both Fabric and NeoForge mod loaders. Simple, direct, and with no extra configuration required.

Screenshots:

Why use Disconnect Packet Fix Mod?

Server owners know that clear logs are essential for maintaining a healthy Minecraft environment. The MC-271325 bug creates massive log spam that can bury legitimate crash reports, warnings, and important system messages.

The Disconnect Packet Fix Mod is a no-frills patch that surgically resolves this specific problem nothing more, nothing less. It’s the kind of mod that you won’t notice until you don’t have it… and your logs are a mess.

Perfect for:

Public and community Minecraft servers
Developers running test environments
Admins who want clean, readable logs without irrelevant packet noise

FAQs

What is the MC-271325 bug?

It’s a Minecraft bug that causes the server to print large amounts of error logs related to the clientbound/minecraft:disconnect packet, usually when players disconnect abruptly.

Does this mod affect gameplay or player connections?

No. It only prevents error logging from specific packets. It has no effect on how players connect or disconnect.

Is this a client-side or server-side mod?

This is a server-side mod. It’s intended to be installed on the server to stop log spam and improve performance.

Which mod loaders are supported?

The mod supports Fabric and NeoForge. There is currently no Forge version.

Do I need to configure anything?

No. The mod works automatically upon installation. There are no settings or commands required.