Effective in version 10.2.2, the data type of the key header port in the Kafka target is binary. Previously, the data type of the key header port was string.
After you upgrade, to run an existing streaming mapping, you must re-create the data object, and update the streaming mapping with the newly created data object.
For more information about re-creating the data object, see the
Big Data Management 10.2.2 Integration Guide.