Flink Kafka producer: Object of class is not serializable

[Soheil Pourbafrani]

I got an error in using Flink Kafka connector for producing data. I
describe the problem here
<https://stackoverflow.com/questions/49589643/flink-kafka-producer-object-of-class-is-not-serializable?noredirect=1#comment86188259_49589643>
in
Stackoverflow. Pls help

Thanks!