About FullStack Watchdog
From ModrinthMake Watchdog crashes show all the code that was running for all threads
This is a tiny server-sided mod that makes it so that the logs show more information when the Watchdog system on the server has killed the server due to being deadlocked or stuck so long. The crash report log will now show all of the code that was running at the time of the deadlocked server. In other words, the full stacktrace of all threads instead of the normally truncated (shortened) version.
In theory, this should help with diagnosing what modded code or mixin has caused an "off-thread" to lock up. When a thread locks up, the server thread gets stuck and if it remains stuck for so long, the Watchdog kills it because a tick took too long to complete. It won't help solve all deadlock issues. But it might get you just enough info to track down the cause of a few deadlocks.
Image below is an example of before and after this mod is put on (Gallery tab shows image better): 
Yes you may ship this mod in a modpack. The client can also have this mod on but it won't do anything on client since the Watchdog system is only ran on servers. You can also run servers with this mod only on the server. Clients without this mod can still connect.
NOTE 1: NeoForge 20.4.107 and newer already has this mod merged into it! You do not need this mod in NeoForge for 1.20.4 MC or newer! https://github.com/neoforged/NeoForge/pull/512
NOTE 2: Fabric API 0.104.0+1.21.2 and newer already has this mod merged into it! You do not need this mod in Fabric for 1.21.2 MC or newer! https://github.com/FabricMC/fabric/pull/4052
Highlights
From source dataGame versions
Supports 19 Minecraft versions, the newest being 1.21.1.
Loaders
Runs on Fabric, Forge and NeoForge.
Footprint
Rated a light load on a server.
FullStack Watchdog on Nxeon
From our catalogue- One-click install
- Supported on Nxeon Minecraft servers. We download it from Modrinth, place it, and restart the server.
- Server side
- Required on the server
- Server type needed
- Fabric, Forge, NeoForge
- Server load
- light
- Smallest plan we suggest
- Minecraft — 2 GB (2 GB RAM). This follows our own load rating above, not a benchmark.
- Latest build
- 1.1.0+1.20.2-neoforge, released 2023-11-22
Game versions by loader
| Loader | Game versions | Newest |
|---|---|---|
| Fabric | 1.16.5 to 1.21.1 (19 versions) | 1.21.1 |
| NeoForge | 1.17.1 to 1.20.4 (14 versions) | 1.20.4 |
| Forge | 1.16.5 to 1.20.1 (12 versions) | 1.20.1 |
From 5 recorded builds of FullStack Watchdog.
Recent builds
| Build | Released | Game versions | Loaders |
|---|---|---|---|
| 1.1.0+1.20.2-neoforge | 2023-11-22 | 1.20.2 to 1.20.4 (3 versions) | NeoForge |
| 1.0.1+1.19.2-forge | 2023-04-13 | 1.17.1 to 1.20.1 (11 versions) | Forge, NeoForge |
| 1.0.1+1.19.2-fabric | 2023-04-13 | 1.17.1 to 1.21.1 (18 versions) | Fabric |
| 1.0.1+1.16.5-forge | 2023-04-13 | 1.16.5 | Forge |
| 1.0.1+1.16.5-fabric | 2023-04-13 | 1.16.5 | Fabric |
Run FullStack Watchdog on a Minecraft server
Pick a server or deploy a new one above; it is installed in one click.
What kind of mod it is
From the catalogGameplay & overhauls
New mechanics, content and overhauls that change how the game plays.
Runs on your server
From source side supportModrinth lists FullStack Watchdog as required on the server. Check its Modrinth page to see whether players need it too.
Compatibility
- Game
- Minecraft
- Loaders
- FabricForgeNeoForge
- Runs on
- Serverrequired on the server
- Game versions
- 1.21.1 and 18 earlier
Verified at the source
- ✓ModrinthOfficial listing, checked 2026-10-01Open ↗
- ✓AuthorTelepathicGrunt, as published on Modrinth
- ✓LicenseMITFree
