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Posted to commits@airflow.apache.org by "zoomingrocket (via GitHub)" <gi...@apache.org> on 2026/09/18 17:33:47 UTC
[I] Airflow Scheduler HTTP Health Check not working in v3.3.1 [airflow]
zoomingrocket opened a new issue, #73349:
URL: https://github.com/apache/airflow/issues/73349
### Under which category would you file this issue?
Airflow Core
### Apache Airflow version
3.3.1
### What happened and how to reproduce it?
We upgraded our local pyPI install from Airflow v3.1.8 to v3.3.1. Our monitoring services use the local health check endpoint exposed via scheduler mini HTTP Server to keep track of all individual schedulers in a HA system and post upgrade, though schedulers were running fine all our health checks were failing.
After further diagnostics, it was clear that there is no longer HTTP Health check server running; the airflow.cfg has below properties setup properly. I checked latest docs and seems like this is valid and supported path?
https://airflow.apache.org/docs/apache-airflow/stable/administration-and-deployment/logging-monitoring/check-health.html#scheduler-health-check-server
[scheduler]
enable_health_check = True
scheduler_health_check_server_host = 0.0.0.0
scheduler_health_check_server_port = 8974
### What you think should happen instead?
Local mini health check path should be listening on the port configured as described in documentation: https://airflow.apache.org/docs/apache-airflow/stable/administration-and-deployment/logging-monitoring/check-health.html#scheduler-health-check-server
### Operating System
RHEL 9.x
### Deployment
Virtualenv installation
### Apache Airflow Provider(s)
_No response_
### Versions of Apache Airflow Providers
_No response_
### Official Helm Chart version
Not Applicable
### Kubernetes Version
_No response_
### Helm Chart configuration
_No response_
### Docker Image customizations
_No response_
### Anything else?
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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Re: [I] Airflow Scheduler HTTP Health Check not working in v3.3.1 [airflow]
Posted by "zoomingrocket (via GitHub)" <gi...@apache.org>.
zoomingrocket commented on issue #73349:
URL: https://github.com/apache/airflow/issues/73349#issuecomment-5786088255
@AbarnaaSree @abhijeets25012-tech - The root cause for this seems to be OTEL being on, as soon as you turn off OTEL configuration in airflow.cfg, the local mini health check server starts.
I documented it in more detail here: https://github.com/apache/airflow/issues/73583
Just to be sure, I even upgraded to 3.3.2, the latest stable release, to ensure we are not testing against 3.3.1, but same root cause; now the mystery is why OTEL is conflicting here.
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Re: [I] Airflow Scheduler HTTP Health Check not working in v3.3.1 [airflow]
Posted by "Kunal8954 (via GitHub)" <gi...@apache.org>.
Kunal8954 commented on issue #73349:
URL: https://github.com/apache/airflow/issues/73349#issuecomment-5739346729
Hey @AbarnaaSree
Sorry, I didn’t see your comment earlier. I’ve already solved the issue and I’m just going to raise the PR now
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Re: [I] Airflow Scheduler HTTP Health Check not working in v3.3.1 [airflow]
Posted by "AbarnaaSree (via GitHub)" <gi...@apache.org>.
AbarnaaSree commented on issue #73349:
URL: https://github.com/apache/airflow/issues/73349#issuecomment-5734012240
I’d like to work on this issue. I’ll investigate why the scheduler health check server is no longer starting in Airflow 3.3.1 despite `enable_health_check` being enabled, and add a regression test for the expected behavior.
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Re: [I] Airflow Scheduler HTTP Health Check not working in v3.3.1 [airflow]
Posted by "boring-cyborg[bot] (via GitHub)" <gi...@apache.org>.
boring-cyborg[bot] commented on issue #73349:
URL: https://github.com/apache/airflow/issues/73349#issuecomment-5733782503
Thanks for opening your first issue here! Be sure to follow the issue template! If you are willing to raise PR to address this issue please do so, no need to wait for approval.
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