The Fix
pip install celery==5.2.7
Based on closed celery/celery issue #7449 · 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.
@@ -113,7 +113,8 @@ these can be specified as arguments to the decorator:
-.. sidebar:: How do I import the task decorator? And what's "app"?
+How do I import the task decorator?
+-----------------------------------
Option A — Upgrade to fixed release\npip install celery==5.2.7\nWhen NOT to use: This fix is not applicable if the documentation layout is not an issue.\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 sidebar task decorators were incorrectly displayed, affecting readability in the documentation
- Why the fix works: Moves the task sidebar blocks into the main content column to improve readability, addressing issue #7449. (first fixed release: 5.2.7).
- If left unfixed, retries/timeouts can trigger duplicate external side-effects (double charges, duplicate emails, repeated writes).
Why This Breaks in Prod
- The sidebar task decorators were incorrectly displayed, affecting readability in the documentation
- Production symptom (often without a traceback): - [x] I have included all related issues and possible duplicate issues in this issue
Proof / Evidence
- GitHub issue: #7449
- Fix PR: https://github.com/celery/celery/pull/7463
- First fixed release: 5.2.7
- Reproduced locally: No (not executed)
- Last verified: 2026-02-09
- Confidence: 0.85
- Did this fix it?: Yes (upstream fix exists)
- Own content ratio: 0.72
Discussion
High-signal excerpts from the issue thread (symptoms, repros, edge-cases).
“Hey @marksweb :wave:, Thank you for opening an issue”
“@auvipy here are those screenshots for my recent PR”
Failure Signature (Search String)
- - [x] I have included all related issues and possible duplicate issues in this issue
- This includes a tweak to the first title because it doesn't actually detail what an app is.
Copy-friendly signature
Failure Signature
-----------------
- [x] I have included all related issues and possible duplicate issues in this issue
This includes a tweak to the first title because it doesn't actually detail what an app is.
Error Message
Signature-only (no traceback captured)
Error Message
-------------
- [x] I have included all related issues and possible duplicate issues in this issue
This includes a tweak to the first title because it doesn't actually detail what an app is.
What Broke
Users found the documentation difficult to read, leading to confusion about task decorators.
Why It Broke
The sidebar task decorators were incorrectly displayed, affecting readability in the documentation
Fix Options (Details)
Option A — Upgrade to fixed release Safe default (recommended)
pip install celery==5.2.7
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/7463
First fixed release: 5.2.7
Last verified: 2026-02-09. Validate in your environment.
When NOT to Use This Fix
- This fix is not applicable if the documentation layout is not an issue.
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 |
|---|---|
| 5.2.7 | Fixed |
Related Issues
No related fixes found.
Sources
We don’t republish the full GitHub discussion text. Use the links above for context.