bharanidharan14 commented on PR #25436:
URL: https://github.com/apache/airflow/pull/25436#issuecomment-1204776480

   > What is the behaviour if the topic you try to create already exists? I'm 
assuming the underlying hook would fail with an exception, but I think the 
operator should catch that error so that the operator can be used idempotently: 
i.e. we should think of the job of this operator to ensure that the specific 
topic exists. (Similarly for delete operator)
   
   yes the existing flow will through an error if the topic name exists, Now I 
have add `try catch` if the topic name exists and return the existing topic 
name with failing the operator


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