
Runtime Hash Updater
Update your resource pack hash for server resource packs while the server is running.
Screenshots

About this Mod
SHA1 Runtime
This is a simple Fabric mod that enables you to update the hash for your server resource pack while the server is still running.
If you are anything like me, I like to constantly add new custom models to my resource pack just to add a little extra customization to Vanilla Minecraft. I do not like however having to ask people to stop what they are doing so I can restart the server to get it to read the new SHA1 Hash.
Setup
Install on a Fabric server only.
- Run the server and join.
- Whenever you update your resource pack put the new hash in the
config/ResourcePackHash.txtfile or run the/updatehashcommand with the new hash. - Once the new hash is added save the file and re-log in game. It should prompt you to install the new resource pack.
Usage:
Once installed you can edit the config/ResourcePackHash.txt file or run the /updatehash command with your new hash to update your hash.
You can use /checkhash to get some info on which hash is being supplied.
You can also use /fetchhash to automagically calculate and set the hash. For a few seconds while the hash is calculated, may cause performance issues if your pack is large.
If you use a third party resource pack host, you can use /setpackurl to set the url of the pack without the need to restart the server.
Commands
/checkhash : Will print out info on the current supplied hash.
/updatehash HASH_EXAMPLE : Will update the config to contain the supplied hash.
/reload_pack : Forces all connected clients to load the resource pack
/fetchhash reload : An optional parameter which will do the above, but force all clients connected to load the new pack
Available Versions
How to Install Runtime Hash Updater on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (26.1).
Install Mod
Open the mod browser in the dashboard and search for "Runtime Hash Updater". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
26.1, 1.21.11, 1.21.10 (+14 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Runtime Hash Updater server crashes on startup – what to do?
Most common cause: wrong fabric 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 (26.1). You can switch loaders with one click in the panel.
Is Runtime Hash Updater compatible with fabric?
Runtime Hash Updater officially supports fabric for Minecraft 26.1, 1.21.11, 1.21.10. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Runtime Hash Updater – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Runtime Hash Updater 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.
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