---
id: "bug-1752"
status: "fixed"
status_updated: "2026-09-24"
status_note: ""
component: "worker"
severity: "unknown"
timestamp: "2026-09-01T10:00:00Z"
last_seen: "2026-09-19T09:00:00Z"
occurrences: 1
files: ["src/worker/src/controller_connector.c"]
tags: ["worker-rejoin-resync", "task-6.1", "controller_connector-c", "myreq_handler", "requirement-3.7", "config-push", "design-reality-mismatch", "found-live-during-implementation"]
related: ["bug-1746", "bug-1747", "bug-1748", "bug-1751"]
legacy: true
---

# bug-1752: worker-rejoin-resync task 6.1 (worker-side config-delivery gap): tasks.md's own task text says to…

## Description
worker-rejoin-resync task 6.1 (worker-side config-delivery gap): tasks.md's own task text says to have 'the worker's existing config-receive handling call xcecd_finished_job_retention_set_window_ms() with the received value' -- premised on some existing per-field config-receive dispatch already existing at the worker that just needed one more field wired in. Investigating before implementing (reading src/worker/src/controller_connector.c's myreq_handler dispatch switch and src/lib/xcectx.c's vtask_entry, which decodes every inbound request before myreq_handler ever sees it) found this premise false: myreq_handler's switch had NO case for OPCode_push at all (only OPCode_startjob/runtasks/jobcontrol/fetchfile/jobStateQuery existed) -- a config push (Request_body_configpushmsg, the body_which xce_pushconfig_req()/worker_push_config() send) fell straight through to `default: break;` and was silently discarded in its entirety, for EVERY field including the pre-existing clustername, not just the not-yet-added workerResyncWindowMs. xcecd_finished_job_retention_set_window_ms()'s own doc comment (xcecd_worker_utils.h, task 4.1) had already independently found and documented the same gap ('the worker daemon has no runtime delivery path for this ClusterConfig field today... worker_push_config() only ever pushes hosttype/hostmodel/resource confvars via collect_confvars()... this setter is the seam a later task wires the real operator-configured value into once that delivery path exists') -- task 6.1 is that later task, but its own task text still assumed the delivery path itself already existed when it did not.

## Environment
_Not recorded (migrated from buglog.json)._

## Reproduction
_Not recorded (migrated from buglog.json)._

## Root cause
No prior worker-rejoin-resync task (nor any task before this spec) ever needed the worker to consume ANY field off an OPCode_push config push, so myreq_handler's dispatch switch was never extended to handle that opcode at all -- xcectx.c's vtask_entry only special-cases the OTHER OPCode_push shape (Request_body_pushmsg, the generic job/worker/resource list-table push used for scheduler/apiserver connections) before handing off to the registered handler; a Request_body_configpushmsg-shaped OPCode_push passes through unmodified into myreq_handler's default: break; case. This predates worker-rejoin-resync entirely and was simply never exercised or noticed because nothing at the worker previously needed any pushed ClusterConfig field.

## Fix
FIXED (2026-09-01, task 6.1, found live during implementation, same design-vs-reality-correction pattern as bug-1746/1747/1748/1751 earlier in this spec). Added a new case OPCode_push: to myreq_handler's dispatch switch, routing to a new handle_pushconfig() function that checks body_which == Request_body_configpushmsg and configdata->data_which == ConfigData_data_workerconfig before reading conf4worker->worker_resync_window_ms and calling xcecd_finished_job_retention_set_window_ms() with it -- scoped narrowly to closing the one seam task 6.1 needs (workerResyncWindowMs), not a general config-receive rework: clustername/confvars remain unconsumed by the worker, unchanged and explicitly out of this task's boundary. New tests in src/worker/testsuite/test_controller_connector.c (white-box, real wire encode via xce_pushconfig_req + real xce_decode + myreq_handler dispatch) cover: the real value reaching the retention setter exactly once, a second/different value also applied (proves live read, not memoized), a non-workerconfig ConfigData arm being ignored, and a NULL configpushmsg being a safe no-op.

## Verification
_Not recorded (migrated from buglog.json)._

## References
- Related: bug-1746, bug-1747, bug-1748, bug-1751