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https://issues.apache.org/jira/browse/AIRFLOW-4420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16836553#comment-16836553
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ASF subversion and git services commented on AIRFLOW-4420:
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Commit e1876250125ecd2d8556a5475a40459469ed29bf in airflow's branch
refs/heads/master from Chao-Han Tsai
[ https://gitbox.apache.org/repos/asf?p=airflow.git;h=e187625 ]
[AIRFLOW-4420] Backfill respects task_concurrency (#5221)
Ensure that backfill respects task_concurrency.
That is, the number of concurrent running tasks
across DAG runs should not exceed task_concurrency.
> Backfill respects task_concurrency
> ----------------------------------
>
> Key: AIRFLOW-4420
> URL: https://issues.apache.org/jira/browse/AIRFLOW-4420
> Project: Apache Airflow
> Issue Type: New Feature
> Reporter: Chao-Han Tsai
> Assignee: Chao-Han Tsai
> Priority: Major
>
> Airflow backfill should respect
> [task_concurrency|https://github.com/apache/airflow/blob/af3090786b170baf32c75fbd03c5f277c3ffaef8/airflow/models/baseoperator.py#L195-L197].
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