Cron external worker ModuleNotFoundError ruamel fix
Cluster 123400 · cron. Data as of
Nothing open on GitHub. Fix merged in #126344 on 28 Sep 2026. Check it covers your case.
The short answer
- Known?
- Yes. 3 related items grouped here, 1 issue already closed.
- Fix event
- A fix was merged to main in PR #126344. Check it covers your case. No release data is tracked.
- Tracker
- The maintainers' tracker marks this
resolved, deciding PR #126344. That is separate from the fix event. - Still open
- Nothing open on GitHub.
A bug where restart-safe cron external workers and scripts were dying with a ModuleNotFoundError for ruamel, traced to running under the wrong interpreter environment. A fix ensures cron jobs use the committed environment interpreter, and jobs now close on a broken PM boot rather than hanging.
Open issues0
Open PRs0
Fixes on record
-
#126344 Restart-safe cron jobs no longer die on 'No module named ruamel' under multiplex, and fail closed on a broken PM boot (#122222, salvage #122936)
files:
contributors/emails/[email protected],contributors/emails/[email protected],contributors/emails/[email protected],contributors/emails/[redacted:email],contributors/emails/[redacted:email],cron/AGENTS.md,cron/__init__.py,cron/scheduler.py,cron/scheduler_worker_env.py,cron/worker_bootstrap.py,tests/cron/test_restart_safe_worker.py
1 PR closed without merging
From the close comments: other 1
- #123525 fix(cron): run external workers and scripts on the committed environment interpreter (fixes #123400, #123440) · other
Closed issues · 1
- Closed#123400[BUG] PM runtime: restart-safe cron external worker dies with ModuleNotFoundError: ruamel
How this cluster was grouped
-
Link evidence (
structural links throughout): every member is connected by structural evidence: shared changed files, or a closing/superseded reference. -
Pairwise link density
0.67: the share of item pairs that carry a link, counting a structural link in full and a relevance-only link at 0.36.1.00means every pair is linked.
Pick up a Lab task
Check whether a fix covers the open issues here, with your own agent. Bring back evidence for maintainers.
Open the LabAt a glance
- Subsystem
- cron
- Merged PRs
- #126344
- Closed issues
- 1
- Attempts
- 1 PR closed without merging
- Fix link checked
- 28 Sep 2026