XD-DENG commented on a change in pull request #12126:
URL: https://github.com/apache/airflow/pull/12126#discussion_r521670483



##########
File path: airflow/operators/dagrun_operator.py
##########
@@ -126,3 +144,22 @@ def execute(self, context: Dict):
                 dag.clear(start_date=self.execution_date, 
end_date=self.execution_date)
             else:
                 raise e
+
+        if self.wait_for_completion:
+            # wait for dag to complete
+            while True:

Review comment:
       I'm thinking if it's making sense to have something like `max_retries` 
or `timeout` here. Otherwise there is a chance that this becomes a dead loop in 
extreme circumstances.
   
   @turbaszek what do you think?




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