Github user harshach commented on the issue:
https://github.com/apache/storm/pull/2066
@liu-zhaokun I am still not sure why are we adding this code. One shouldn't
be using 0.9 kafka clients and this storm-kafka-client will not work with 0.9
as the interface changed in 0.10 and we made changes to storm-kafka-client to
start working only from 0.10 kafka clients only. As I said before 0.9 kafka
clients shouldn't be used as they are alpha quality.
If you look the kafka client docs https://kafka.apache.org/documentation/ ,
you'll see "**sasl.jaas.config"** this is consumer config one can pass and the
storm-kafka-client will allow you to pass this config. So there is necessity to
add this code.
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