lei.chen/myxce
1
0
Fork 1
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

fix(frontend): job control no longer returns HTTP 500 (bug-1490)

Browse source 
Two stacked defects in the apiserver job-control link, both of which kept
hold/release/cancel from ever reaching the controller:

1. controllers/jobs.go: validateJobControl and foundJob asserted
   jobinfo.Data["array_idx"].(int64), but StoreToOrderMaps produces
   array_idx as int (models.JobInfo.ArrayIdx is declared int) -> panic
   -> Gin Recovery -> HTTP 500 before backend.ControlJob ran. Add
   normalizeJobInt64 / jobArrayIdx helpers and use them in both
   functions (job_status already had this fix via normalizeJobStatus;
   array_idx was missed).

2. backend/clib.go: backend.ControlJob set xce_jobctrl_t.action to the
   models.JOB_* constant (JOB_STOP=1 / JOB_RESUME=2 / JOB_KILL=3 /
   JOB_CHKPNT=8), but that field is the capnp JobControl union
   discriminant (JobControl_u_siginfo=0 / JobControl_u_ckptoption=1).
   The controller's job_ctrl() selected the wrong union branch (or
   none, since encode_JobControl drops the union pointer for
   non-0/1 discriminants) and rejected every control with -EINVAL.
   Add jobCtrlDiscriminant() and use it.

Also: resolveExecUser was defined in the cgo-only convert.go but is
exercised by a non-cgo test, so `make test` (CGO_ENABLED=0) failed to
build the backend package. Move it to convert_pure.go so it compiles in
both modes.

Tests: 3 controller regression tests (validateJobControl allowed /
not-allowed branches, foundJob array-child branch) + 1 backend
jobCtrlDiscriminant test. make test fully green. Cluster E2E verified:
hold -> PSUSP, release -> PEND, cancel -> EXIT on a PEND job, no 500,
no -EINVAL, all daemons healthy.

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
lei.chen 2026-08-07 07:35:51 +00:00
parent d3a92f1033
commit c90e63ec0f
7 changed files with 368 additions and 29 deletions
Download patch file Download diff file Expand all files Collapse all files

7
src/frontend/apiserver/backend/clib.go
View file

@ -394,7 +394,12 @@ func SubmitJob(job *models.JobInfo, arraySize int) error {
func ControlJob(jobid uint64, action int, content string) error {
var ctrl C.xce_jobctrl_t
ctrl.jobid = C.uint64_t(jobid)
ctrl.action = C.int(action)
// ctrl.action is the capnp JobControl union DISCRIMINANT (0=siginfo,
// 1=ckptoption), NOT the models.JOB_* constant. bug-1490: setting it to
// JOB_STOP/RESUME/KILL/CHKPNT (1/2/3/8) made the controller's job_ctrl()
// select the wrong union branch (or none) and reject every control with
// -EINVAL, so hold/release/cancel never reached the job.
ctrl.action = C.int(jobCtrlDiscriminant(action))
// For signal-based actions set signo; for checkpoint set ckpt options.
// xce_jobctrl_t.u is a C union — we use a static C helper to set the