(airflow) 10/12: Removed unused config: dag_stale_not_seen_duration (#55601)

[ka...@apache.org]

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kaxilnaik pushed a commit to branch v3-1-test
in repository https://gitbox.apache.org/repos/asf/airflow.git

commit 6a51f595d94f57fcdca1fb18df2e8a953c5f4034
Author: Niko Oliveira <on...@amazon.com>
AuthorDate: Sat Sep 13 20:17:37 2025 -0700

    Removed unused config: dag_stale_not_seen_duration (#55601)
    
    This config was used by the scheduler for the stale dag removal process.
    That process was removed from the scheduler in #47304 but these traces of
    the config were left behind.
    
    (cherry picked from commit f3b4dc6cf1970c98e0318879711df1cb0bbeb8cf)
---
 airflow-core/docs/faq.rst                             | 1 -
 airflow-core/src/airflow/config_templates/config.yml  | 7 -------
 airflow-core/src/airflow/jobs/scheduler_job_runner.py | 1 -
 3 files changed, 9 deletions(-)

diff --git a/airflow-core/docs/faq.rst b/airflow-core/docs/faq.rst
index 00673a8e5f7..f57f2ddebf2 100644
--- a/airflow-core/docs/faq.rst
+++ b/airflow-core/docs/faq.rst
@@ -227,7 +227,6 @@ There are several reasons why Dags might disappear from the UI. Common causes in
   * :ref:`config:dag_processor__file_parsing_sort_mode` - Ensure sorting method matches your sync strategy
   * :ref:`config:dag_processor__parsing_processes` - Number of parallel parsers
   * :ref:`config:scheduler__parsing_cleanup_interval` - Controls stale Dag cleanup frequency
-  * :ref:`config:scheduler__dag_stale_not_seen_duration` - Time threshold for marking Dags as stale
 
 * **File synchronization problems** - Common with git-sync setups:
 
diff --git a/airflow-core/src/airflow/config_templates/config.yml b/airflow-core/src/airflow/config_templates/config.yml
index 5da744041a2..b3bc911e1d8 100644
--- a/airflow-core/src/airflow/config_templates/config.yml
+++ b/airflow-core/src/airflow/config_templates/config.yml
@@ -2158,13 +2158,6 @@ scheduler:
       type: integer
       default: "20"
       see_also: ":ref:`scheduler:ha:tunables`"
-    dag_stale_not_seen_duration:
-      description: |
-        Time in seconds after which dags, which were not updated by Dag Processor are deactivated.
-      version_added: 2.4.0
-      type: integer
-      example: ~
-      default: "600"
     use_job_schedule:
       description: |
         Turn off scheduler use of cron intervals by setting this to ``False``.
diff --git a/airflow-core/src/airflow/jobs/scheduler_job_runner.py b/airflow-core/src/airflow/jobs/scheduler_job_runner.py
index 5d918704736..7dd38519648 100644
--- a/airflow-core/src/airflow/jobs/scheduler_job_runner.py
+++ b/airflow-core/src/airflow/jobs/scheduler_job_runner.py
@@ -198,7 +198,6 @@ class SchedulerJobRunner(BaseJobRunner, LoggingMixin):
         self._task_instance_heartbeat_timeout_secs = conf.getint(
             "scheduler", "task_instance_heartbeat_timeout"
         )
-        self._dag_stale_not_seen_duration = conf.getint("scheduler", "dag_stale_not_seen_duration")
         self._task_queued_timeout = conf.getfloat("scheduler", "task_queued_timeout")
         self._enable_tracemalloc = conf.getboolean("scheduler", "enable_tracemalloc")