GitHub user dosubot[bot] added a comment to the discussion: Async Queries redis
connection error
<!-- Answer -->
Your configOverrides are almost correct, but Superset 5.0+ now requires a new
setting for async queries: you must define `GLOBAL_ASYNC_QUERIES_CACHE_BACKEND`
in your `superset_config.py`. If this is missing, Superset falls back to
defaults (localhost:6379), which causes the connection errors you're
seeing—even if your environment variables and other configs are set properly.
This is a recent change and isn't reflected in older docs or most support
threads.
Add the following to your configOverrides, using your existing Redis variables:
```python
GLOBAL_ASYNC_QUERIES_CACHE_BACKEND = {
'CACHE_TYPE': 'RedisCache',
'CACHE_REDIS_HOST': REDIS_HOST,
'CACHE_REDIS_PORT': REDIS_PORT,
'CACHE_REDIS_DB': REDIS_DB,
'CACHE_KEY_PREFIX': 'superset_async_',
}
```
This will ensure async queries use your intended Redis host and DB, and prevent
fallback to localhost. After updating, redeploy all Superset pods (web, worker,
etc.) so the new config is loaded everywhere. You can find more details in the
[recent PR and code changes](https://github.com/apache/superset/pull/29912).
If you still see issues, double-check that the environment variables are
present in all pods, and that the correct `superset_config.py` is being loaded.
Also, check the logs for which Redis host is actually being used at runtime.
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GitHub link:
https://github.com/apache/superset/discussions/34650#discussioncomment-14081049
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