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fix(bug-1731): fire HOOK_DETAIL_JOB_START/JOB_EXIT on WAL apply

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apply_committed_entry() (persist.c), the single seam that applies every
committed WAL entry, only ever fired the generic HOOK_DETAIL_JOB_UPDATE
for job-state changes -- HOOK_DETAIL_JOB_START/JOB_EXIT were
permanently dead code, since job.c only ever fires them at
HOOK_BEFORE_EVENT (for WAL-append purposes). This left sched_job_start_
fun/sched_job_exit_fun (sched.c) and apiserver_job_start_fun/
apiserver_job_exit_fun (apiserver.c) unreachable, and the Go apiserver's
already-wired OnJobFinished handler permanently starved of data -- a
finished job's state could stay stuck (e.g. showing RUN) in the
scheduler's own view and the apiserver never learned a job finished.

The wire format was already enriched by bug-1697/bug-1689 with the
pidinfo/exit_info data these hooks need, so this closes the gap rather
than requiring new wire work. WAL_JOB_FINISH now fires
HOOK_DETAIL_JOB_EXIT; WAL_JOB_START now fires HOOK_DETAIL_JOB_START,
gated on a call-scoped decode flag rather than the transition result
(WAL_JOB_START applies as a no-op duplicate for every real job in
production per bug-1697, so gating on the transition result would make
it dead code again). WAL_JOB_FAIL -> HOOK_DETAIL_JOB_FAIL has the same
gap and is left as a follow-up.

Also includes this investigation's supporting changes: a DEBUG3 log-
retention bump (main.c, both controller and scheduler) so race-condition
evidence survives a live burst without rotating out, and DEBUG3-gated
diagnostic trace logging at the two points a job-update notification
can fire or silently drop (job.c, sched.c).

Live-verified end to end on a real deployed cluster: scheduler-side
sched_job_state_change now fires for RUN and EXIT states, and the
apiserver's OnJobFinished -- previously never invoked in production --
now correctly updates job status on completion.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_019QxaSzHRB7pmYFp4cVnwkA
This commit is contained in:
Rongsong Shen 2026-08-29 11:29:10 +00:00
parent 42e1eeaa29
commit ebe691c3ed
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GPG key ID: 5BCDAAE0123E9FE2
9 changed files with 521 additions and 22 deletions
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11
src/scheduler/src/main.c
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@ -271,6 +271,17 @@ int main(int argc, char* argv[])
loglevel = verbose_to_loglevel(arguments.verbose);
}
/* DEBUG3 produces order-of-magnitude more log volume than the default
* size/count budget below is sized for, so tlog's own rotation can
* gzip away the window a bug occurred in well before anyone gets a
* chance to look (bug-1731: the primary's log for the exact moment a
* race fired had already rotated out). Give DEBUG3 runs a much larger
* retention budget so a targeted repro survives to be inspected. */
if (strcmp(loglevel, "debug3") == 0) {
logsize *= 8;
logcount *= 4;
}
/* Req 5 AC 10 (scheduler-core spec, task 9.1): --record-dir is the
* ONLY way record_dir is ever provisioned -- see this flag's
* options[] entry above and scheduler.h's field comment. */