carlos54 opened a new issue, #59272:
URL: https://github.com/apache/airflow/issues/59272
### Apache Airflow version
Other Airflow 2/3 version (please specify below)
### If "Other Airflow 2/3 version" selected, which one?
3.1.4
### What happened?
Description :
The Dag Processor correctly identifies and logs an import error within a DAG
file, but the corresponding error message and Stack Trace are not visible in
the Airflow User Interface (no "import Errors" tab).
```
DAG File Processing Stats
Bundle File Path PID Current Duration # DAGs # Errors Last Duration Last Run
At
-------- ---------------------------------- ----- ------------------
-------- ---------- --------------- -------------------
sandbox sandbox_dag005_dataset_producer.py 1 0 0.26s 2025-12-10T11:38:29
sandbox sandbox_dag_demo.py 0 1 0.21s 2025-12-10T11:38:29
```
Error in log dag processor log file are correctly catch :
```
{"timestamp":"2025-12-10T11:33:23.270722Z","level":"error","event":"AirflowException(\"Task
Policy validation failed for 'DO_DATASET':\\n[DATASET OUTLETS] Dataset URI
'event_data01_dispo' in
task 'DO_DATASET' must start with
'sandbox_'.\")","logger":"airflow.models.dagbag.DagBag","filename":"dagbag.py","lineno":556,"error_detail":[{"exc_type":"AirflowException","exc_value":"Tas
k Policy validation failed for 'DO_DATASET':\n[DATASET OUTLETS] Dataset URI
'event_data01_dispo' in task 'DO_DATASET' must start with
'sandbox_'.","exc_notes":[],"syntax_error":null,"is_caus
e":false,"frames":[{"filename":"/usr/local/lib/python3.12/site-packages/airflow/models/dagbag.py","lineno":552,"name":"bag_dag"},{"filename":"/usr/local/lib/python3.12/site-packages/airflow/settings.py","lineno":183,"name":"task_policy"},{"filename":"/usr/local/lib/python3.12/site-packages/pluggy/_hooks.py","lineno":512,"name":"__call__"},{"filename":"/usr/local/lib/python3.12/site-packages/pluggy/_manager.py","lineno":120,"name":"_hookexec"},{"filename":"/usr/local/lib/python3.12/site-packages/pluggy/_callers.py","lineno":167,"name":"_multicall"},{"filename":"/usr/local/lib/python3.12/site-packages/pluggy/_callers.py","lineno":121,"name":"_multicall"},{"filename":"/opt/airflow/config/cluster_policy.py","lineno":173,"name":"task_policy"}],"is_group":false,"exceptions":[]}]}
```
This prevents developers from quickly identifying the source of the failure,
especially those caused by the cluster_policy.
### What you think should happen instead?
The "Import Errors" view in the Airflow UI should be display .
### How to reproduce
The dag_processor ariflow.cfg:
dag_bundle_config_list: '{{ .Values.DAGS.bundle_list }}'
dag_bundle_storage_path: '/dags/airflow/bundles'
refresh_interval: 60
bundle_refresh_check_interval : 15
print_stats_interval: 60
parsing_processes: 2
dag_file_processor_timeout: 60
min_file_process_interval: 30
stale_dag_threshold : 300
### Operating System
redhat/ubi9:9.6
### Versions of Apache Airflow Providers
apache-airflow==3.1.4 \
structlog==25.5.0 \
psycopg2-binary==2.9.11 \
asyncpg==0.31.0 \
apache-airflow-providers-fab==3.0.3 \
apache-airflow-providers-redis==4.4.0 \
apache-airflow-providers-git==0.1.0 \
apache-airflow-providers-cncf-kubernetes==10.11.0 \
flask-limiter==3.12 \
redis==5.3.1 \
authlib==1.6.5 \
PyJWT==2.10.1 \
cryptography==42.0.8 \
requests==2.32.5
### Deployment
Official Apache Airflow Helm Chart
### Deployment details
_No response_
### Anything else?
_No response_
### Are you willing to submit PR?
- [x] 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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