We made a change [1] that required users to re-write code that uses KafkaStreamer to initialise tuple extractors. The re-write is not immediately obvious, and for simple use cases (streaming single tuples) it is easy to write a helper function that will make the transition easier.
I intend to raise a JIRA and submit a PR to implement this. MG [1] https://issues.apache.org/jira/browse/IGNITE-4140 -- Michael Griggs Consultant, EMEA GridGain Systems
