RJ's Session Stats
Fabric server mod that writes per-session stat deltas when players disconnect.
In addition to the vanilla statistics files, you get a per session (between join/leave) file for each player.
What it does
- Captures a stat snapshot on join and computes deltas on disconnect.
- Writes a JSON file per session under:
world/stats/sessions/YYYY-MM-DD/. - File names include start/end timestamps, player UUID, and player name.
Output format
Uses the vanilla stats JSON format, but values are deltas for the session.
Example file listing (one player)
$ find server-data/world/stats/
server-data2/world/stats/
server-data2/world/stats/5b2b1d3d-0d25-4086-bd3f-27328f30467c.json
server-data2/world/stats/sessions
server-data2/world/stats/sessions/2026-01-17
server-data2/world/stats/sessions/2026-01-17/2026-01-17T19-29-40Z_2026-01-17T19-48-56Z__5b2b1d3d-0d25-4086-bd3f-27328f30467c__RJ_1982.json
server-data2/world/stats/sessions/2026-01-17/2026-01-17T19-52-36Z_2026-01-17T19-55-20Z__5b2b1d3d-0d25-4086-bd3f-27328f30467c__RJ_1982.json
server-data2/world/stats/sessions/2026-01-17/2026-01-17T19-58-08Z_2026-01-17T19-58-33Z__5b2b1d3d-0d25-4086-bd3f-27328f30467c__RJ_1982.json
server-data2/world/stats/sessions/2026-01-17/2026-01-17T20-02-52Z_2026-01-17T20-02-57Z__5b2b1d3d-0d25-4086-bd3f-27328f30467c__RJ_1982.json
server-data2/world/stats/sessions/2026-01-17/2026-01-17T20-05-59Z_2026-01-17T20-06-08Z__5b2b1d3d-0d25-4086-bd3f-27328f30467c__RJ_1982.json
server-data2/world/stats/sessions/2026-01-19
server-data2/world/stats/sessions/2026-01-19/2026-01-19T14-20-36Z_2026-01-19T14-20-58Z__5b2b1d3d-0d25-4086-bd3f-27328f30467c__RJ_1982.json
server-data2/world/stats/sessions/2026-01-19/2026-01-19T14-31-19Z_2026-01-19T16-03-47Z__5b2b1d3d-0d25-4086-bd3f-27328f30467c__RJ_1982.json
server-data2/world/stats/sessions/2026-01-19/2026-01-19T16-04-43Z_2026-01-19T19-46-16Z__5b2b1d3d-0d25-4086-bd3f-27328f30467c__RJ_1982.json
server-data2/world/stats/sessions/2026-01-19/2026-01-19T19-46-27Z_2026-01-19T23-16-04Z__5b2b1d3d-0d25-4086-bd3f-27328f30467c__RJ_1982.json
...
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.11
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as rjs-session-stats-1.0.1.jar — drop this file into the mods folder
- Download size: 15 KB
- Download link checked 12 Sept 2026 — working
These come from our own check of the pack file, not from the source page.