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https://issues.apache.org/jira/browse/AIRFLOW-5071?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17501136#comment-17501136
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ASF GitHub Bot commented on AIRFLOW-5071:
-----------------------------------------
ghostbody commented on issue #10790:
URL: https://github.com/apache/airflow/issues/10790#issuecomment-1058801920
After STRUGLING, We found a method to 100% reproduce this issue !!!
tl;dr
https://github.com/apache/airflow/blob/9ac742885ffb83c15f7e3dc910b0cf9df073407a/airflow/models/taskinstance.py#L1253
Add a `raise` to simulate db error which will likely happen when the DB is
under great pressure.
Then you will get this issue `Was the task killed externally` in all the
time.
Conditions:
- Airflow 2.2
- Celery Executor
It's becasue the worker use a local task job which will spwan a child
process to execute the job. The parent process set the task from `Queued` to
`Running` State. However, when the prepare work for the parent process failed,
it will lead to this error directly.
related code is here:
https://github.com/apache/airflow/blob/2.2.2/airflow/jobs/local_task_job.py#L89
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> Thousand os Executor reports task instance X finished (success) although the
> task says its queued. Was the task killed externally?
> ----------------------------------------------------------------------------------------------------------------------------------
>
> Key: AIRFLOW-5071
> URL: https://issues.apache.org/jira/browse/AIRFLOW-5071
> Project: Apache Airflow
> Issue Type: Bug
> Components: DAG, scheduler
> Affects Versions: 1.10.3
> Reporter: msempere
> Priority: Critical
> Fix For: 1.10.12
>
> Attachments: image-2020-01-27-18-10-29-124.png,
> image-2020-07-08-07-58-42-972.png
>
>
> I'm opening this issue because since I update to 1.10.3 I'm seeing thousands
> of daily messages like the following in the logs:
>
> ```
> {{__init__.py:1580}} ERROR - Executor reports task instance <TaskInstance: X
> 2019-07-29 00:00:00+00:00 [queued]> finished (success) although the task says
> its queued. Was the task killed externally?
> {{jobs.py:1484}} ERROR - Executor reports task instance <TaskInstance: X
> 2019-07-29 00:00:00+00:00 [queued]> finished (success) although the task says
> its queued. Was the task killed externally?
> ```
> -And looks like this is triggering also thousand of daily emails because the
> flag to send email in case of failure is set to True.-
> I have Airflow setup to use Celery and Redis as a backend queue service.
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