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https://issues.apache.org/jira/browse/AIRFLOW-2934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16594845#comment-16594845
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Andreas Költringer commented on AIRFLOW-2934:
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We have the same problem. I created [a thread on the dev mailing
list.|https://lists.apache.org/thread.html/a482ace7c609143910364b0305159f653c307e4f4fb680d4a7cf314b@%3Cdev.airflow.apache.org%3E]
Besides that, I [created a
Gist|https://gist.github.com/akoeltringer/63fcf0340ae219c112b2a5377e6d2715] to
reproduce the issue.
> Pools not respected for internal subdag tasks
> ---------------------------------------------
>
> Key: AIRFLOW-2934
> URL: https://issues.apache.org/jira/browse/AIRFLOW-2934
> Project: Apache Airflow
> Issue Type: Bug
> Components: pools, subdag
> Affects Versions: 1.9.0
> Environment: Linux victorvianna 4.14.65-1-MANJARO #1 SMP PREEMPT Sat
> Aug 18 13:29:56 UTC 2018 x86_64 GNU/Linux
> Python 3.6.6
> Reporter: Victor Vianna
> Priority: Blocker
> Labels: pool, subdag
> Attachments: Screenshot from 2018-08-22 12-32-32.png, dag_pool.py
>
>
> I'm trying to have some subdags execute one task at a time. The way I found
> was to create a first pool for the SubdagOperators (pool1 in the attached
> code file) and a second one for the internal tasks (pool2). However, it
> appears that pools for subdag elements are not being respected. Running
> airflow 1.9.0 with LocalExecutor.
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