The Fix
pip install celery==5.5.3
Based on closed celery/celery issue #9704 · PR/commit linked
Production note: This usually shows up under retries/timeouts. Treat it as a side-effect risk until you can verify behavior with a canary + real traffic.
@@ -885,9 +885,9 @@ on backend specifications).
For the moment this only works with the AMQP, database, cache, Couchbase,
- and Redis backends.
+ filesystem and Redis backends.
Option A — Upgrade to fixed release\npip install celery==5.5.3\nWhen NOT to use: This fix is not applicable if the documentation does not need updates.\n\n
Why This Fix Works in Production
- Trigger: - [X] I have included all related issues and possible duplicate issues in this issue
- Mechanism: The documentation for result_expires was not updated to reflect support for filesystem backends
- Why the fix works: Updated the documentation for `result_expires` to reflect support for filesystem backends when `celery beat` is active. (first fixed release: 5.5.3).
- If left unfixed, the same config can fail only in production (env differences), causing startup failures or partial feature outages.
Why This Breaks in Prod
- The documentation for result_expires was not updated to reflect support for filesystem backends
- Production symptom (often without a traceback): - [X] I have included all related issues and possible duplicate issues in this issue
Proof / Evidence
- GitHub issue: #9704
- Fix PR: https://github.com/celery/celery/pull/9716
- First fixed release: 5.5.3
- Reproduced locally: No (not executed)
- Last verified: 2026-02-09
- Confidence: 0.75
- Did this fix it?: Yes (upstream fix exists)
- Own content ratio: 0.75
Discussion
High-signal excerpts from the issue thread (symptoms, repros, edge-cases).
“can you please contribute the documentation update?”
“@auvipy created a PR, feel free to review”
Failure Signature (Search String)
- - [X] I have included all related issues and possible duplicate issues in this issue
- or possible duplicates to this issue as requested by the checklist above.
Copy-friendly signature
Failure Signature
-----------------
- [X] I have included all related issues and possible duplicate issues in this issue
or possible duplicates to this issue as requested by the checklist above.
Error Message
Signature-only (no traceback captured)
Error Message
-------------
- [X] I have included all related issues and possible duplicate issues in this issue
or possible duplicates to this issue as requested by the checklist above.
What Broke
Users may be unaware that filesystem backends are supported, leading to confusion and misconfiguration.
Why It Broke
The documentation for result_expires was not updated to reflect support for filesystem backends
Fix Options (Details)
Option A — Upgrade to fixed release Safe default (recommended)
pip install celery==5.5.3
Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.
Fix reference: https://github.com/celery/celery/pull/9716
First fixed release: 5.5.3
Last verified: 2026-02-09. Validate in your environment.
When NOT to Use This Fix
- This fix is not applicable if the documentation does not need updates.
Did This Fix Work in Your Case?
Quick signal helps us prioritize which fixes to verify and improve.
Prevention
- Capture the exact failing error string in logs and tests so you can reproduce via a minimal script.
- Pin production dependencies and upgrade only with a reproducible test that hits the failing path.
Version Compatibility Table
| Version | Status |
|---|---|
| 5.5.3 | Fixed |
Related Issues
No related fixes found.
Sources
We don’t republish the full GitHub discussion text. Use the links above for context.