[jira] [Work started] (AIRFLOW-6251) add config for max tasks per dag to prevent scheduler denial of service

["t oo (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AIRFLOW-6251?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Work on AIRFLOW-6251 started by t oo.
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> add config for max tasks per dag to prevent scheduler denial of service
> -----------------------------------------------------------------------
>
>                 Key: AIRFLOW-6251
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-6251
>             Project: Apache Airflow
>          Issue Type: New Feature
>          Components: scheduler
>    Affects Versions: 1.10.6
>            Reporter: t oo
>            Assignee: t oo
>            Priority: Major
>
> airflow is often shared between users of varying experience levels. to prevent a novice user causing a accidental denial of service to the scheduler (by uploading huge dag which hogs all scheduler resources) i propose new server side config: 
>  # max num of tasks in a single dag: if 0 then no limit
> To add to this airflow can't handle 18k tasks in single dag (dag_processor_manager times out after 300 seconds) , but if i split up into 6 dags of 3k tasks each then it works.



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