vvcephei commented on pull request #11767:
URL: https://github.com/apache/kafka/pull/11767#issuecomment-1041078717


   Thanks, @showuon ! I noticed that also, but there are also a whole bunch of 
other nullable object references with primitive-typed getters in that class, so 
I figured it was just some funky log4j thing.
   
   I figured out that the setter is used by log4 to apply the configuration 
(for example, `log4j.appender.kafka_appender.RequiredNumAcks=-1` calls 
`setRequredNumAcks(-1)`), but I don't know if the getters serve any purpose.


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