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Posted to commits@airflow.apache.org by "Dan Fowler (JIRA)" <ji...@apache.org> on 2018/07/02 16:53:00 UTC
[jira] [Commented] (AIRFLOW-1104) Concurrency check in scheduler
should count queued tasks as well as running
[ https://issues.apache.org/jira/browse/AIRFLOW-1104?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16530175#comment-16530175 ]
Dan Fowler commented on AIRFLOW-1104:
-------------------------------------
PR: https://github.com/apache/incubator-airflow/pull/3568
> Concurrency check in scheduler should count queued tasks as well as running
> ---------------------------------------------------------------------------
>
> Key: AIRFLOW-1104
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1104
> Project: Apache Airflow
> Issue Type: Bug
> Environment: see https://github.com/apache/incubator-airflow/pull/2221
> "Tasks with the QUEUED state should also be counted below, but for now we cannot count them. This is because there is no guarantee that queued tasks in failed dagruns will or will not eventually run and queued tasks that will never run will consume slots and can stall a DAG. Once we can guarantee that all queued tasks in failed dagruns will never run (e.g. make sure that all running/newly queued TIs have running dagruns), then we can include QUEUED tasks here, with the constraint that they are in running dagruns."
> Reporter: Alex Guziel
> Priority: Minor
>
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