sidshas03 commented on PR #63355:
URL: https://github.com/apache/airflow/pull/63355#issuecomment-4043391958

   > @sidshas03 Could you post logs please
   
   Hi @kaxil, as requested, sharing the relevant logs and exact lines.
   
   <img width="1571" height="433" alt="Screenshot 2026-03-11 at 22 05 05" 
src="https://github.com/user-attachments/assets/c0cd943c-375e-4cf9-ace8-0f8a41847b6c";
 />
   
   1) Symptom from #63183 (task completed, then 409, then process exits)
   - `"event": "Done. Returned value was: None"`
   - `"exc_value": "API_SERVER_ERROR: {'status_code': 409, ... 'reason': 
'invalid_state', ... 'previous_state': 'success'}"`
   - `"event": "Process exited abnormally"`
   
   2) Scheduler race timeline from #57618 (same TI getting two tries)
   - `2025-12-15T04:42:29.146414Z [info] Add task ... try_number=1`
   - `2025-12-15T04:43:58.258654Z [info] Reset the following 12 orphaned 
TaskInstances ...`
   - `2025-12-15T04:44:01.790234Z [info] Add task ... try_number=2`
   - `2025-12-15T04:45:19.337468Z [info] Marking run <DagRun sadp_dag_128 ...> 
successful`
   - `2025-12-15T04:45:20.038291Z [info] Creating kubernetes pod ... 
try_number=1`
   - `2025-12-15T04:46:04.784337Z [info] Received executor event with state 
failed ... try_number=1`
   
   3) API/server side conflict log from #57618
   - `{"event":"API server 
error","status_code":409,"detail":{"detail":{"reason":"invalid_state","previous_state":"success"}}}`
   - `{"event":"Top level error", ... "API_SERVER_ERROR: {'status_code': 409, 
... 'previous_state': 'success'}"}`
   - `airflow.sdk.api.client.ServerResponseError: Server returned error`
   
   Links:
   - https://github.com/apache/airflow/issues/63183
   - https://github.com/apache/airflow/issues/57618#issuecomment-3654781912
   - https://github.com/apache/airflow/issues/57618#issuecomment-3665287828
   
   From these logs, root cause is scheduler-side HA race/duplicate scheduling 
path; #63355 is a focused mitigation so duplicate-success 409 does not fail 
task process, while scheduler race handling is in #63367.
   


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