Exactly-once Support in Apache Kafka
Jay Kreps

Hi Jay, Nice article. I am trying to implement exactly-once for one of the Bank usecase. I have written code referring to javadoc of kafka website.

program hangs while calling producer.initTransactions().

I have asked this question here: https://stackoverflow.com/questions/45047876/apache-kafka-exactly-once-implementation-not-sending-messages

If you can look into and help me then that would be grateful.