Bowrna opened a new issue, #30012:
URL: https://github.com/apache/airflow/issues/30012
### Apache Airflow version
Other Airflow 2 version (please specify below)
### What happened
I have a cluster policy enabled where i add the fields for task in it. This
works fine for all the task. I tried to add a DAG with dynamic task mapping
enabled and it didn't load in the UI. On checking the scheduler logs, i found
the below log trace.
```
[2023-03-10T00:01:24.998+0000] {processor.py:154} INFO - Started process
(PID=498) to work on /root/airflow/dags/test_dynamic_task_mapping.py
[2023-03-10T00:01:25.000+0000] {processor.py:756} INFO - Processing file
/root/airflow/dags/test_dynamic_task_mapping.py for tasks to queue
[2023-03-10T00:01:25.002+0000] {logging_mixin.py:120} INFO -
[2023-03-10T00:01:25.001+0000] {dagbag.py:537} INFO - Filling up the DagBag
from /root/airflow/dags/test_dynamic_task_mapping.py
[2023-03-10T00:01:25.042+0000] {logging_mixin.py:120} INFO - No success
callback added. So adding here
[2023-03-10T00:01:25.044+0000] {logging_mixin.py:120} INFO -
[2023-03-10T00:01:25.042+0000] {dagbag.py:564} ERROR - can't set attribute
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/airflow/models/dagbag.py",
line 551, in collect_dags
found_dags = self.process_file(filepath,
only_if_updated=only_if_updated, safe_mode=safe_mode)
File "/usr/local/lib/python3.8/site-packages/airflow/models/dagbag.py",
line 307, in process_file
found_dags = self._process_modules(filepath, mods,
file_last_changed_on_disk)
File "/usr/local/lib/python3.8/site-packages/airflow/models/dagbag.py",
line 437, in _process_modules
self.bag_dag(dag=dag, root_dag=dag)
File "/usr/local/lib/python3.8/site-packages/airflow/models/dagbag.py",
line 464, in bag_dag
self._bag_dag(dag=dag, root_dag=root_dag, recursive=True)
File "/usr/local/lib/python3.8/site-packages/airflow/models/dagbag.py",
line 481, in _bag_dag
settings.task_policy(task)
File "/root/airflow/config/airflow_local_settings.py", line 270, in
task_policy
_check_task_rules(task)
File "/root/airflow/config/airflow_local_settings.py", line 258, in
_check_task_rules
rule(current_task)
File "/root/airflow/config/airflow_local_settings.py", line 221, in
add_success_callback
task.on_success_callback= task_success_alert
AttributeError: can't set attribute
[2023-03-10T00:01:25.045+0000] {processor.py:768} WARNING - No viable dags
retrieved from /root/airflow/dags/test_dynamic_task_mapping.py
[2023-03-10T00:01:25.058+0000] {processor.py:176} INFO - Processing
/root/airflow/dags/test_dynamic_task_mapping.py took 0.074 seconds
[2023-03-10T00:02:06.276+0000] {processor.py:154} INFO - Started process
(PID=1524) to work on /root/airflow/dags/test_dynamic_task_mapping.py
```
### What you think should happen instead
The attribute setting for task in cluster policy should not throw error
### How to reproduce
I have added a cluster policy setting like mentioned here
https://gist.github.com/Bowrna/1994894beea39fa8e1c269591b7f0346
And then i tried to load the example dynamic task mapping DAG that comes as
loaded example DAG in the UI
### Operating System
centos
### Versions of Apache Airflow Providers
Version : 2.4.2
### Deployment
Virtualenv installation
### Deployment details
_No response_
### Anything else
I would love to contribute in fixing the issue. But i would like to get the
views from the community members more about this issue.
### 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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