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https://issues.apache.org/jira/browse/AIRFLOW-1825?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16257529#comment-16257529
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Jonathan Bender commented on AIRFLOW-1825:
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In that case you would have two sensors, one for the dummy task in dag A, and
one for the dummy task in dag B. If you're concerned about the performance hit
of two external task sensors vs one then I guess my other suggestion would be
better!
> Set Multi dag dependency
> -------------------------
>
> Key: AIRFLOW-1825
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1825
> Project: Apache Airflow
> Issue Type: Task
> Reporter: Snigdha Nair
>
> I have 3 dags A, B and C. Dag C should get triggered only after tasks in dag
> A and B completes. Is there a way to implement this in airflow? I am able to
> set dependency between dag A and C using Triggerdagrun Operator. But when I
> try to set dependency between dag B and C, C is getting triggered when either
> A or B completes. Can someone please help me in solving this? I understand
> that explains external task sensor Operator can be used. But it continuously
> polls if task in dag A and B is complete which might create performance hit
> over a period of time.
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