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airflow - How to force fail a dag after x number of time?

I want to force fail a dag after say 3 hours have passed. I have a dag that is scheduled for 2am and one that is scheduled for 6am. I want the 2am dag to stop and give precedence to the one scheduled at 6am.

  1. I have already tried using execution_timeout
  2. I have tried using dagrun_timeout keeps running as there are no other dags to run within the first dag.

NOTE: This is like a cross-dag dependency where I want to give preference to a dag during certain hours


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