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Szymon Grzemski commented on AIRFLOW-5071: ------------------------------------------ In our case sensors are marked as a failed (even if they were successful) on UP_TO_RESCHEDULE state. As mentioned before: {code:java} [2020-07-06 13:24:48,189] {scheduler_job.py:1328} ERROR - Executor reports task instance <TaskInstance: dedupe-emr-job-flow.check_signals_table 2020-07-06 12:00:00+00:00 [queued]> finished (success) although the task says its queued. Was the task killed externally?{code} The error occures in this funtion: [https://github.com/apache/airflow/blob/1.10.9/airflow/jobs/scheduler_job.py#L1441] which calls: [https://github.com/apache/airflow/blob/1.10.9/airflow/jobs/scheduler_job.py#L1511-L1530] I think the state mismatch may happen somewhere between those lines. After reading the _validate_and_run_task_instances function you can see that executing/queueing the tasks happens just before calling the executor heartbeat (which is reponsible for communication with the Celery queue). So how can Celery executor read a success state from the queue when the task has just been queued. [~turbaszek] Am I right or am I lost in the code? :D > 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. -- This message was sent by Atlassian Jira (v8.3.4#803005)