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Posted to commits@airflow.apache.org by "potiuk (via GitHub)" <gi...@apache.org> on 2026/03/07 18:49:15 UTC
[PR] Fix task_instance_mutation_hook receiving run_id=None during TaskInst… [airflow]
potiuk opened a new pull request, #63049:
URL: https://github.com/apache/airflow/pull/63049
…ance creation
Also Add regression test verifying the hook sees the correct run_id
In airflow/models/taskinstance.py, TI.__init__() calls self.refresh_from_task(task) which invokes
task_instance_mutation_hook(task_instance) via _refresh_from_task(). However, self.run_id is not assigned until after this call, so any mutation hook that depends on run_id sees None.
```python
self.refresh_from_task(task) # calls hook — self.run_id is None here
...
self.run_id = run_id # too late
```
This means a hook like the one in the issue:
```python
def task_instance_mutation_hook(task_instance):
if task_instance.run_id.startswith("manual__"):
task_instance.pool = "manual_pool"
```
fails with AttributeError: 'NoneType' object has no attribute 'startswith' (or silently does nothing if guarded with getattr).
Move self.run_id = run_id before self.refresh_from_task(task) in TI.__init__():
self.run_id = run_id # set BEFORE refresh_from_task
self.map_index = map_index
self.refresh_from_task(task) # hook now sees correct run_id
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Re: [PR] Fix task_instance_mutation_hook receiving run_id=None during TaskInst… [airflow]
Posted by "potiuk (via GitHub)" <gi...@apache.org>.
potiuk merged PR #63049:
URL: https://github.com/apache/airflow/pull/63049
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Re: [PR] Fix task_instance_mutation_hook receiving run_id=None during TaskInst… [airflow]
Posted by "potiuk (via GitHub)" <gi...@apache.org>.
potiuk commented on PR #63049:
URL: https://github.com/apache/airflow/pull/63049#issuecomment-4017132081
cc: @vatsrahul1001 -> in case we do 3.1.8rc2, that one would be a candidate
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Re: [PR] Fix task_instance_mutation_hook receiving run_id=None during TaskInst… [airflow]
Posted by "potiuk (via GitHub)" <gi...@apache.org>.
potiuk commented on PR #63049:
URL: https://github.com/apache/airflow/pull/63049#issuecomment-4017112823
Forward-ported from https://github.com/apache/airflow/pull/62999
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Re: [PR] Fix task_instance_mutation_hook receiving run_id=None during TaskInst… [airflow]
Posted by "github-actions[bot] (via GitHub)" <gi...@apache.org>.
github-actions[bot] commented on PR #63049:
URL: https://github.com/apache/airflow/pull/63049#issuecomment-4017340623
### Backport failed to create: v3-1-test. View the failure log <a href='https://github.com/apache/airflow/actions/runs/22807080119'> Run details </a>
Note: As of [Merging PRs targeted for Airflow 3.X](https://github.com/apache/airflow/blob/main/dev/README_AIRFLOW3_DEV.md#merging-prs-targeted-for-airflow-3x)
the committer who merges the PR is responsible for backporting the PRs that are bug fixes (generally speaking) to the maintenance branches.
In matter of doubt please ask in [#release-management](https://apache-airflow.slack.com/archives/C03G9H97MM2) Slack channel.
<table>
<tr>
<th>Status</th>
<th>Branch</th>
<th>Result</th>
</tr>
<tr>
<td>❌</td>
<td>v3-1-test</td>
<td><a href="https://github.com/apache/airflow/commit/3a75c22136749a26dd44bad29e79c2f51c6d9660"><img src='https://img.shields.io/badge/Commit-3a75c22-red' alt='Commit Link'></a></td>
</tr>
</table>
You can attempt to backport this manually by running:
```bash
cherry_picker 3a75c22 v3-1-test
```
This should apply the commit to the v3-1-test branch and leave the commit in conflict state marking
the files that need manual conflict resolution.
After you have resolved the conflicts, you can continue the backport process by running:
```bash
cherry_picker --continue
```
If you don't have cherry-picker installed, see the [installation guide](https://github.com/apache/airflow/blob/main/dev/README_AIRFLOW3_DEV.md#how-to-backport-pr-with-cherry-picker-cli).
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