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Posted to commits@airflow.apache.org by "Apache Spark (JIRA)" <ji...@apache.org> on 2018/09/02 18:05:03 UTC

[jira] [Commented] (AIRFLOW-1491) Celery executor restarts result in duplicate tasks

    [ https://issues.apache.org/jira/browse/AIRFLOW-1491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16601523#comment-16601523 ] 

Apache Spark commented on AIRFLOW-1491:
---------------------------------------

User 'bolkedebruin' has created a pull request for this issue:
https://github.com/apache/incubator-airflow/pull/2538

> Celery executor restarts result in duplicate tasks
> --------------------------------------------------
>
>                 Key: AIRFLOW-1491
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-1491
>             Project: Apache Airflow
>          Issue Type: Bug
>            Reporter: George Leslie-Waksman
>            Assignee: George Leslie-Waksman
>            Priority: Major
>
> Since the Celery executor uses internal state to determine what it has queued already, anything that wipes the executor state (such as a scheduler restart) will result in rescheduling of tasks.
> This bug exacerbates a number of task scheduling race conditions and can result in duplicate task execution.



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