Xiroo opened a new pull request, #34715:
URL: https://github.com/apache/airflow/pull/34715

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   Use execution timeout in task state trigger run method.
   Previously, self._timeout_sec = 60 fixed timeout to check if dag run exists.
   It caused timeout even if the dag run state is in queued or scheduled due to 
resource issue like hundreds of dag runs exists and they are pending 
transitting into running states.
   So I changed to use execution_timeout instead of fixed 60 seconds.
   But I'm wondering if using execution_timeout makes sense so I want to get 
some suggestions.
   
   I know the current logic has some bugs.
   I want to address the all following issues but I'll do it step by step.
   This is the first step of fixing the deferred mode of ExternalTaskSensor
   #34204
   #34205 
   #34207 
   
   
   
   
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