kirillsights opened a new issue, #66190:
URL: https://github.com/apache/airflow/issues/66190
### Under which category would you file this issue?
Airflow Core
### Apache Airflow version
3.2.1
### What happened and how to reproduce it?
Scheduler regularly crashed with:
```
pydantic_core._pydantic_core.ValidationError: 2 validation errors for DagRun
consumed_asset_events.0.source_aliases
Error extracting attribute: DetachedInstanceError: Parent instance
<AssetEvent at 0x7fb19e3478b0> is not bound to a Session; lazy load operation
of attribute 'source_aliases' cannot proceed (Background on this error at:
https://sqlalche.me/e/20/bhk3) [type=get_attribute_error,
input_value=<unprintable AssetEvent object>, input_type=AssetEvent]
For further information visit
https://errors.pydantic.dev/2.12/v/get_attribute_error
consumed_asset_events.1.source_aliases
Error extracting attribute: DetachedInstanceError: Parent instance
<AssetEvent at 0x7fb19d7a56d0> is not bound to a Session; lazy load operation
of attribute 'source_aliases' cannot proceed (Background on this error at:
https://sqlalche.me/e/20/bhk3) [type=get_attribute_error,
input_value=<unprintable AssetEvent object>, input_type=AssetEvent]
For further information visit
https://errors.pydantic.dev/2.12/v/get_attribute_error
```
This happened under high load, so its hard to reproduce it in a simple case.
Full log:
[airflow-prod-scheduler-b4cfc7457-cd8qb_scheduler_previous.log](https://github.com/user-attachments/files/27263760/airflow-prod-scheduler-b4cfc7457-cd8qb_scheduler_previous.log)
### What you think should happen instead?
Scheduler should not crash.
### Operating System
Debian GNU/Linux 12 (bookworm)
### Deployment
Official Apache Airflow Helm Chart
### Apache Airflow Provider(s)
_No response_
### Versions of Apache Airflow Providers
_No response_
### Official Helm Chart version
1.18.0
### 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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