mcvsubbu commented on issue #7022:
URL: 
https://github.com/apache/incubator-pinot/issues/7022#issuecomment-854860935


   We had considered this before. The best way to do this seemed to be to 
introduce a new API call into streams, returning a boolean whether or not the 
new streams config is compatible with the old one. Each underlying stream would 
then have to implement the logic to scan through. In case of Kafka, change in 
topic, or change in broker address should not be permitted (at least for some 
implementations). Some implementations may allow change in broker address as 
long as the topic is the same.
   
   For Kinesis, appropriate checks need to be added.
   
   Thanks for filing the issue.


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