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fix(scheduler): re-queue job as PEND on dispatch failure (bug-1494 class)

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The controller rejects a dispatch when the chosen worker is not in a
dispatchable state (UNAVAIL after a worker death, or still joining) and
replies with a jobDispatchFail notify. The scheduler had no handler for that
event, so a job it had just committed (state=RUN) was never returned to PEND
— it was never re-elected and stayed PEND cluster-wide even after the worker
recovered.

Handle NotifyData_data_jobDispatchFail: log the failure and call the new
sched_requeue_pend_job(), which frees the dispatch bookkeeping, resets the
job to PEND, and re-enqueues it in the fcfs pendJobs queue so the next
election session re-dispatches it. White-box test TUs that #include
handler.c get a sched_requeue_pend_job stub.

Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
lei.chen 2026-08-11 03:19:07 +00:00
parent 5657fca7f7
commit 6928f74702
6 changed files with 94 additions and 0 deletions
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1
src/scheduler/include/scheduler.h
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@ -130,6 +130,7 @@ extern void sched_go(xce_scheduler_t*);
extern void sched_begin_session(xce_scheduler_t*);
extern void sched_end_session(xce_scheduler_t*);
extern xce_sched_job_t* sched_get_job(xce_scheduler_t*, uint64_t);
extern int sched_requeue_pend_job(xce_scheduler_t*, uint64_t);
extern xce_sched_queue_t* sched_get_queue(xce_scheduler_t*, char*);
extern xce_sched_worker_t* sched_get_worker(xce_scheduler_t*, char*);
extern xce_sched_user_t* sched_get_user(xce_scheduler_t*, char*);