Fixes#86721.
`hermes cron run <job_id>` (a one-shot CLI invocation) dispatches
manual runs via the same background-delegation path as an agent's
`cronjob(action='run')` tool call (tools/cronjob_tools.py's
_try_dispatch_background_run -> dispatch_async_delegation(role=
"cron_run", runner=_runner, ...)). The runner thread lives in the
calling process's shared daemon executor. When the one-shot process
exits right after printing "Triggered job: ...", the in-flight runner
dies mid-execution, leaving its cron/executions.db row permanently
stuck at status='claimed' -- every subsequent `hermes cron run` on the
same job then reports "Ran now: failed" because of the still-claimed
row.
cron/executions.py already has the exact self-heal this needs:
recover_interrupted_executions() correctly identifies and reclassifies
'claimed'/'running' rows whose owner process has provably exited
(_owner_is_live checks PID existence AND matches process start-time,
so a reused PID isn't mistaken for the original live owner) to
'unknown', unblocking the job for a fresh claim. But it was only ever
called once, at the long-lived scheduler ticker's own startup
(cron/scheduler.py:379's self.recover_interrupted()) -- a one-shot CLI
invocation has no equivalent "startup" moment of its own, so this
self-heal never ran for it.
Added a call to recover_interrupted_executions() at the top of
_try_dispatch_background_run, right after the async-delivery-supported
gate and before any claim attempt for the current job -- mirroring
exactly what the long-lived scheduler already does at its own
startup, just triggered per one-shot invocation instead of once at
daemon startup. Wrapped in try/except: pass (best-effort; a failure
here must not block the actual dispatch this function exists for).
Traced (but did not attempt to fix) the deeper "why does the runner
die with the process at all" question -- that's the harder problem
options 1/2 in the issue describe (route to the persistent scheduler,
or block the one-shot process until completion). This fix addresses
the more urgent, more clearly-scoped symptom: a stranded stale claim
permanently blocking ALL future manual runs of the affected job, which
is option 3 from the issue and the one with an existing, already-
correct implementation just needing to be wired into this call site.
Added 3 regression tests to a new file, following the established
real-subprocess dead-owner pattern already used in
tests/cron/test_execution_ledger.py (a genuinely-dead PID, not a
mock, matching the real-world failure mode exactly): a sanity test
confirming the stale claim sits unrecovered without the fix; a direct
test of recover_interrupted_executions() reaping such a claim; and a
unit test on _try_dispatch_background_run itself confirming recovery
is called before any claim attempt. Verified as a genuine regression
by reverting the fix and confirming the unit test fails with recovery
never having been called.
35/35 pass across the new test file plus tests/cron/test_execution_ledger.py
and tests/tools/test_cronjob_run_background.py (no regression).
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