---
id: "bug-1943"
status: "open"
status_updated: "2026-10-10"
status_note: "newly logged"
component: "scheduler"
severity: "wrong-result"
timestamp: "2026-10-10T08:14:54Z"
last_seen: "2026-10-10T08:14:54Z"
occurrences: 1
files: ["src/scheduler/src/core_events.c", "src/scheduler/src/scheduler.c"]
tags: ["scheduler", "sim", "equivalence", "limit"]
related: []
---

# bug-1943: xce_scheduler --sim does not load user and host groups, so group-scoped limits differ from live

## Description
**Observed:** (source reading, `.kiro/reviews/project-gap-review-2026-10-10.md` (P0); to be confirmed by a failing test before the fix)
On a config push the live scheduler loads user and host groups (`groupmgr_load_configs`, `src/scheduler/src/scheduler.c:1144-1145`); the core's config event used by the simulator applies only resources, resource values and queues (`core_events.c:846-850`).

**Expected:** Live and simulated scheduling apply the same groups (scheduler-driver-equivalence.md).
**Impact:** Replays of clusters with group-scoped limits make different decisions than the live scheduler.
**Found by:** review: `.kiro/reviews/project-gap-review-2026-10-10.md` (P0)
## Environment
- OS: no /etc/os-release; Docker container; NixOS kernel; kernel Linux 6.18.33 x86_64
- libc: glibc 2.42-47 (interpreter /nix/store/wb6rhpznjfczwlwx23zmdrrw74bayxw4-glibc-2.42-47/lib/ld-linux-x86-64.so.2)
- Toolchain: gcc (GCC) 15.2.0, meson 1.9.1
- Build: asan (xce.build)
- Code: scheduler-framework @ 94472ee3-dirty
- Deployment: any (found by source reading; the failing test that confirms it is named in Verification)

## Reproduction
1. Record a session with a limit scoped to a user group, replay it with `xce_scheduler --sim`.
2. The limit does not match the group's users in sim.
- Frequency: deterministic (by code reading; confirmed by the RED test of the fix)
- Evidence: the code sites quoted in Description; no logs kept.
## Root cause
TODO: required for fixed/partial

## Fix
TODO: required for fixed/partial

## Verification
- Test: TODO: name + file; RED before the fix, GREEN after
- Suites: TODO: suite results and build profile
- Live: TODO: soak/deploy run, or n/a and why

## References
- Related: none