curcur edited a comment on pull request #11725:
URL: https://github.com/apache/flink/pull/11725#issuecomment-629650067


   Hey @AHeise , thank you so much again!
   
   I believe I've addressed most of the minor issues mentioned in the previous 
reviews. Please remind me if I miss anything but for the one "extracted this 
inside of the for loop". I've left an offline msg to you to explain why I think 
it is better not to do it right now.
   
   FLINK-17307 changes the KafkaFetcher to emit the output in batch (once per 
partition), but mine is using once per record (emitting record and watermark in 
a different way).
   
   You can see they have logical differences. It might worth changing to batch 
emit as well, but might be two collectors, one for watermarks and the other one 
for records.
   
   I am not saying the change is difficult, but I am learning to be 
conservative right now and I’ve already listed it as a follow-up: 
https://issues.apache.org/jira/browse/FLINK-15670.
   
   As it is only related to putting `for loops` inside or outside of the 
extraction, it is not that dirty?
   What do you think?
   
   I am going to work on the Java Docs for public API right now. Please let me 
know if you have any more comments on the code side. Thanks!!:grin:
   


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