docs(buglog): bug-1905 fixed in 8ac637ad; log bug-1908 (kill lost before worker registers job)

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

.wolf/bugs/bug-1908.md

@@ -0,0 +1,59 @@
+---
+id: "bug-1908"
+status: "investigating"
+status_updated: "2026-10-02"
+status_note: "worker drops a kill that arrives before the job is in its worker list; controller-side handling of the worker's error (retry or not) not yet traced"
+component: "worker"
+severity: "wrong-result"
+timestamp: "2026-10-02T02:27:01Z"
+last_seen: "2026-10-02T02:27:01Z"
+occurrences: 1
+files: ["src/worker/src/controller_connector.c"]
+tags: ["job-control", "kill", "race", "dispatch"]
+related: ["bug-1905"]
+---
+
+# bug-1908: a kill sent right after dispatch is lost: the worker drops it before registering the job
+
+## Description
+**Observed:**
+```
+05,850 controller_connector.c:563  Job ID: 1-0-1790907905-32768[2], Command: sleep 600 ...   (dispatch received)
+07,318 controller_connector.c:1546 Received job control request to send SIGINFO for job ID: 1-0-1790907905-32768[2]
+07,318 controller_connector.c:1586 Failed to find worker for job ID: 1-0-1790907905-32768[2]
+09,690 xcecd_worker_utils.c:352    Job ID 1-0-1790907905-32768[2] running - sending status to controller
+```
+`xcecli jobs list` already showed the job RUN, `xcecli jobs kill` answered `job <...> is being <kill>` (apiserver `overallStatus accepted`), but the worker had not yet added the job to its worker list, dropped the request, and the job then ran to completion. Same for a plain job (1-0-1790907905-0: dispatch 06,876, kill 07,313 dropped, running 09,724).
+
+**Expected:** a kill accepted for a job the controller shows as RUN takes effect: the worker applies it once the job is registered (or the controller retries / reports the kill as not delivered).
+**Impact:** wrong result: a kill issued in the first seconds after dispatch is reported as accepted but silently lost; the job keeps running. The lookup branch is shared by the real worker (`xcecd`), not only `xcecd_virtual` (real worker not tested).
+**Found by:** test (live verification of bug-1905, 2026-10-01)
+
+## 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 (src/build.jai)
+- Code: scheduler-framework @ 8ac637ad-dirty
+- Deployment: 3-node HA (xce-deploy-ha) + scheduler + apiserver + one xcecd_virtual worker, single host
+
+## Reproduction
+1. Deploy with xce-deploy-ha + `start-all.sh`; `xcecli login -u admin -p admin --url http://localhost:8080`.
+2. `xcecli jobs submit -J plain sleep 600 </dev/null`; as soon as `xcecli jobs list` shows RUN (about 1 s), `xcecli jobs kill <id> </dev/null`.
+3. The worker log shows `Failed to find worker for job ID`, and the job stays RUN.
+- Frequency: 2/2 kills sent within ~1.5 s of dispatch, 2026-10-01
+- Evidence: /home/claude/tmp/kill-race/worker.log
+
+## 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