YoannAbriel opened a new pull request, #63250:
URL: https://github.com/apache/airflow/pull/63250
## Problem
When a DAG run times out via `dagrun_timeout`, unfinished task instances are
marked `SKIPPED` but their `end_date` is never set. The UI computes duration as
`now - start_date`, so skipped tasks show a continuously increasing duration —
confusing and incorrect.
## Root Cause
In `SchedulerJobRunner._schedule_dag_run`, the timeout handler sets
`task_instance.state = TaskInstanceState.SKIPPED` but doesn't touch `end_date`.
Without an `end_date`, the UI falls back to computing live duration.
## Fix
Set `end_date = timezone.utcnow()` alongside the state change for all tasks
skipped by dagrun timeout. Added a test that creates a timed-out DAG run with
running tasks and verifies `end_date` is populated after the scheduler
processes it.
Closes: #58536
<!-- SPDX-License-Identifier: Apache-2.0
https://www.apache.org/licenses/LICENSE-2.0 -->
---
##### Was generative AI tooling used to co-author this PR?
- [X] Yes — Claude Code
Generated-by: Claude Code following [the
guidelines](https://github.com/apache/airflow/blob/main/contributing-docs/05_pull_requests.rst#gen-ai-assisted-contributions)
---
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for more information. Note: commit author/co-author name and email in commits
become permanently public when merged.
* For fundamental code changes, an Airflow Improvement Proposal
([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvement+Proposals))
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