[jira] [Closed] (AIRFLOW-2736) Airflow 1.9.0+ Scheduler not honouring "non_pooled_task_slot_count" config

["Ash Berlin-Taylor (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AIRFLOW-2736?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ash Berlin-Taylor closed AIRFLOW-2736.
--------------------------------------
    Resolution: Cannot Reproduce

For a (now) old version of Airflow - please re-open if this still happens.

> Airflow 1.9.0+ Scheduler not honouring "non_pooled_task_slot_count" config
> --------------------------------------------------------------------------
>
>                 Key: AIRFLOW-2736
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-2736
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 1.9.0
>            Reporter: raman
>            Priority: Major
>
> We are using airflow version 1.9 with celery executor. And we are observing that Airflow Scheduler is not honouring the "non_pooled_task_slot_count" config.  We are using default setting which is set to 128. But we could schedule and run >128 tasks concurrently.
> From code it seems that scheduler is re-initialising the open_slots with 128 instead of setting the remaining left over slots.
> in Jobs.py
> for pool, task_instances in pool_to_task_instances.items():
>  if not pool:
>  # Arbitrary:
>  # If queued outside of a pool, trigger no more than
>  # non_pooled_task_slot_count per run
>  open_slots = conf.getint('core', 'non_pooled_task_slot_count')



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