[jira] [Updated] (AIRFLOW-41) SubdagOperators can oversubscribe to pools due to race condition

["Aizhamal Nurmamat kyzy (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AIRFLOW-41?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Aizhamal Nurmamat kyzy updated AIRFLOW-41:
------------------------------------------
         Labels: subdag  (was: )
    Component/s: operators

Adding 'operators' component and 'subdag' label for component refactor.

> SubdagOperators can oversubscribe to pools due to race condition
> ----------------------------------------------------------------
>
>                 Key: AIRFLOW-41
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-41
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: operators, scheduler, subdag
>    Affects Versions: 1.7.1
>            Reporter: Bolke de Bruin
>            Priority: Major
>              Labels: subdag
>
> SubDagOperators essentially create their own mini-scheduler. Which can interfere with the main scheduler. 
> SubdagOperators check if there is slot available in a Pool. However this slot is not claimed at the same time leaving room for main scheduler to also check for the slot. Both can then obtain a slot and thus oversubscribe
> A solution could be a centralized PoolHandler that gives out slots



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