GitHub user dosubot[bot] added a comment to the discussion: How to enable
Global Async Queries on v5.0.0 using helm chart in GKE
<!-- Answer -->
This error persists because Superset (via Flask) requires SERVER_NAME to be set
for generating absolute URLs in background tasks like Global Async Queries, but
in Kubernetes/Helm environments, setting SERVER_NAME is brittle—if it doesn't
exactly match the external hostname (including port) that users and Celery
workers use to access Superset, Flask will reject requests and you'll get 404s.
Your ingress config looks correct for forwarding headers, but unless
${HOSTNAME} is a static, known DNS name, there’s no robust way to set
SERVER_NAME safely in this setup.
If your ingress hostname is static, set SERVER_NAME in configOverrides to that
exact value (no protocol, just the hostname, and include the port if not
80/443). If it's dynamic or changes, there’s no supported workaround in
Superset 5.0.0—this is a known limitation for async queries in cloud-native
environments [reference](https://github.com/apache/superset/discussions/34517).
Best practice: leave SERVER_NAME unset unless you have a static hostname, and
make sure ENABLE_PROXY_FIX = True, PREFERRED_URL_SCHEME = "https", and
SESSION_COOKIE_SECURE = True are set. If you want to experiment, you could try
scripting SERVER_NAME injection at deployment time based on your ingress DNS,
but this is brittle and not officially supported.
If you can't use a static hostname, you may need to wait for upstream
improvements or consider disabling GAQ for now
[reference](https://github.com/apache/superset/discussions/34517).
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GitHub link:
https://github.com/apache/superset/discussions/34517#discussioncomment-13968546
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