RocksDB key value store

Hi, I am attempting to have a local KV store that has a String as key and a HashSet as the value. Looking at the default serializers I don't see any that would be of help to me. Would I have to write my own serializer? Thanks

Hello Samza tutorial

Hi, I am following the "Hello Samza" tutorial here: http://samza.apache.org/startup/hello-samza/0.9/ .Following all the steps I get an error/warn (no brokers found when trying to rebalance.) when I try to consume the topic using the command deploy/kafka/bin/kafka-console-consumer.sh --zookeeper