redis-py sentinel_get_master_addr_by

The Fix

pip install redis==7.1.0

Based on closed redis/redis-py issue #3139 · PR/commit linked

Production note: Most teams hit this during upgrades or environment changes. Roll out with a canary and smoke critical endpoints (health, OpenAPI/docs) before 100%.

Jump to Verify Open PR/Commit

@@ -223,19 +223,31 @@ async def execute_command(self, *args, **kwargs):
                node at random, rather than across the entire sentinel cluster.
         """
-        once = bool(kwargs.get("once", False))
-        if "once" in kwargs.keys():
-            kwargs.pop("once")

repro.py

root@ubuntu:~# cat sentinel.go
package main

import (
        "github.com/redis/go-redis/v9"
        "context"
        "fmt"
)

func main() {
  sentinel := redis.NewSentinelClient(&redis.Options{
          Addr: "redis-sentinel-sentinel-headless.redis.svc.cluster.local:26379",
          Username: "default",
          Password: "asdf"},
  )

  ctx := context.TODO()

  fmt.Print( sentinel.GetMasterAddrByName(ctx, "myMaster").Result() )

}
root@ubuntu:~# go run sentinel.go
[192.168.94.104 6379]

verify

Re-run the minimal reproduction on your broken version, then apply the fix and re-run.

fix.md

Option A — Upgrade to fixed release\npip install redis==7.1.0\nWhen NOT to use: Do not use this fix if the application relies on the boolean return type for logic.\n\n

Why This Fix Works in Production

Trigger: This does NOT...
Mechanism: The sentinel_get_master_addr_by_name() function incorrectly returns a boolean instead of a (host, port) pair
Why the fix works: Fixes the sentinel_get_master_addr_by_name() function to return a (host, port) pair instead of a boolean value. (first fixed release: 7.1.0).

Production impact:

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

Shows up under Python 3.10.12 in real deployments (not just unit tests).
The sentinel_get_master_addr_by_name() function incorrectly returns a boolean instead of a (host, port) pair
Production symptom (often without a traceback): This does NOT...

Proof / Evidence

GitHub issue: #3139
Fix PR: https://github.com/redis/redis-py/pull/3191
First fixed release: 7.1.0
Reproduced locally: No (not executed)
Last verified: 2026-02-09
Confidence: 0.85
Did this fix it?: Yes (upstream fix exists)
Own content ratio: 0.57

Discussion

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

Jump to Sources Open on GitHub

“This issue is marked stale. It will be closed in 30 days if it is not updated.”

@github-actions · 2025-02-15 · source

Failure Signature (Search String)

This does NOT...
>> sentinel = redis.sentinel.Sentinel([('redis-sentinel-sentinel-headless.redis.svc.cluster.local', 26379)], socket_timeout=0.5, password='asdf', sentinel_kwargs={'password':

Copy-friendly signature

signature.txt

Failure Signature
-----------------
This does NOT...
>> sentinel = redis.sentinel.Sentinel([('redis-sentinel-sentinel-headless.redis.svc.cluster.local', 26379)], socket_timeout=0.5, password='asdf', sentinel_kwargs={'password': 'asdf'})

Error Message

Signature-only (no traceback captured)

error.txt

Error Message
-------------
This does NOT...
>> sentinel = redis.sentinel.Sentinel([('redis-sentinel-sentinel-headless.redis.svc.cluster.local', 26379)], socket_timeout=0.5, password='asdf', sentinel_kwargs={'password': 'asdf'})

Minimal Reproduction

repro.py

root@ubuntu:~# cat sentinel.go
package main

import (
        "github.com/redis/go-redis/v9"
        "context"
        "fmt"
)

func main() {
  sentinel := redis.NewSentinelClient(&redis.Options{
          Addr: "redis-sentinel-sentinel-headless.redis.svc.cluster.local:26379",
          Username: "default",
          Password: "asdf"},
  )

  ctx := context.TODO()

  fmt.Print( sentinel.GetMasterAddrByName(ctx, "myMaster").Result() )

}
root@ubuntu:~# go run sentinel.go
[192.168.94.104 6379]

Environment

Python: 3.10.12

What Broke

Users receive a boolean response instead of the expected (host, port) pair, causing confusion and errors.

Why It Broke

The sentinel_get_master_addr_by_name() function incorrectly returns a boolean instead of a (host, port) pair

Fix Options (Details)

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

pip install redis==7.1.0

When NOT to use: Do not use this fix if the application relies on the boolean return type for logic.

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/3191

First fixed release: 7.1.0

Last verified: 2026-02-09. Validate in your environment.

When NOT to Use This Fix

Do not use this fix if the application relies on the boolean return type for logic.

Verify Fix

verify

Re-run the minimal reproduction on your broken version, then apply the fix and re-run.

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:configuration-error redis-py hub redis-py best practices All hubs All clusters

Related clusters: Retry storm Data consistency Race condition

Sources

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

redis-py sentinel_get_master_addr_by_name() returns boolean instead of (host, port) pair (Fix)