redis-py redis_listen_with_retries: adjusting back-off for

The Fix

pip install redis==7.1.0

Based on closed redis/redis-py issue #1449 · 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.

Open PR/Commit

@@ -0,0 +1,105 @@
@@ -0,0 +1,105 @@
+from abc import ABC, abstractmethod
+import random
+

fix.md

Option A — Upgrade to fixed release\npip install redis==7.1.0\nWhen NOT to use: This fix should not be used if the application requires longer back-off periods for retries.\n\n

Why This Fix Works in Production

Trigger: [2021-02-04 15:56:24,751] ERROR (socketio) <redis_manager.py>._redis_listen_with_retries: Cannot receive from redis... retrying in 1 secs
Mechanism: The back-off logic for retries in redis_listen_with_retries was too aggressive, causing delays in reconnecting
Why the fix works: Adds a retry mechanism with backoff strategies to improve the handling of connection failures in Redis. (first fixed release: 7.1.0).

Production impact:

If left unfixed, retry loops can amplify load and turn a small outage into a cascade (thundering herd).

Why This Breaks in Prod

Shows up under Python 3.6.9 in real deployments (not just unit tests).
The back-off logic for retries in redis_listen_with_retries was too aggressive, causing delays in reconnecting
Production symptom (often without a traceback): [2021-02-04 15:56:24,751] ERROR (socketio) <redis_manager.py>._redis_listen_with_retries: Cannot receive from redis... retrying in 1 secs

Proof / Evidence

GitHub issue: #1449
Fix PR: https://github.com/redis/redis-py/pull/1494
First fixed release: 7.1.0
Reproduced locally: No (not executed)
Last verified: 2026-02-07
Confidence: 0.85
Did this fix it?: Yes (upstream fix exists)
Own content ratio: 0.79

Discussion

High-signal excerpts from the issue thread (symptoms, repros, edge-cases).

Jump to Sources Open on GitHub

“@gil0109 You might find this recent PR of interest. I'd love to see some feedback if you have it!”

@chayim · 2021-08-11 · source

Failure Signature (Search String)

[2021-02-04 15:56:24,751] ERROR (socketio) <redis_manager.py>._redis_listen_with_retries: Cannot receive from redis... retrying in 1 secs
[2021-02-04 15:57:20,175] ERROR (socketio) <redis_manager.py>._redis_listen_with_retries: Cannot receive from redis... retrying in 2 secs

Copy-friendly signature

signature.txt

Failure Signature
-----------------
[2021-02-04 15:56:24,751] ERROR (socketio) <redis_manager.py>._redis_listen_with_retries: Cannot receive from redis... retrying in 1 secs
[2021-02-04 15:57:20,175] ERROR (socketio) <redis_manager.py>._redis_listen_with_retries: Cannot receive from redis... retrying in 2 secs

Error Message

Signature-only (no traceback captured)

error.txt

Error Message
-------------
[2021-02-04 15:56:24,751] ERROR (socketio) <redis_manager.py>._redis_listen_with_retries: Cannot receive from redis... retrying in 1 secs
[2021-02-04 15:57:20,175] ERROR (socketio) <redis_manager.py>._redis_listen_with_retries: Cannot receive from redis... retrying in 2 secs

Environment

Python: 3.6.9

What Broke

Users experienced delays in receiving messages due to excessive retry back-off during Redis cluster failover.

Why It Broke

The back-off logic for retries in redis_listen_with_retries was too aggressive, causing delays in reconnecting

Fix Options (Details)

Option A — Upgrade to fixed release Safe default (recommended)

pip install redis==7.1.0

When NOT to use: This fix should not be used if the application requires longer back-off periods for retries.

Use when you can deploy the upstream fix. It is usually lower-risk than long-lived workarounds.

Fix reference: https://github.com/redis/redis-py/pull/1494

First fixed release: 7.1.0

Last verified: 2026-02-07. Validate in your environment.

When NOT to Use This Fix

This fix should not be used if the application requires longer back-off periods for retries.

Did This Fix Work in Your Case?

Quick signal helps us prioritize which fixes to verify and improve.

Prevention

Make timeouts explicit and test them (unit + integration) to avoid silent behavior changes.
Instrument retries (attempt count + reason) and alert on spikes to catch dependency slowdowns.

Version Compatibility Table

Version	Status
7.1.0	Fixed

Related Issues

No related fixes found.

Cluster: redis-py:retry-storm redis-py hub redis-py best practices All hubs All clusters

Related clusters: Configuration error Data consistency Race condition

Sources

We don’t republish the full GitHub discussion text. Use the links above for context.

redis-py redis_listen_with_retries: adjusting back-off for kubernetes (Fix)