tl;dr Make sure that key.converter.schema.registry.url and value.converter.schema.registry.url are specified, and that there are no trailing whitespaces. I’ve been building on previous work I’ve done with Oracle GoldenGate and Kafka Connect, looking at how to have the change records from the Oracle database come through to Kafka in Avro format rather than the default JSON that the sample configuration gives. Simply changing the Kafka Connect OGG configuration file (confluent.properties) from value.converter=org.apache.kafka.connect.json.JsonConverter key.

Similar to the previous issue, the sample config in the docs causes another snafu: OGG-15051 Java or JNI exception: oracle.goldengate.util.GGException: Class not found: "kafkahandler". kafkahandler Class not found: "kafkahandler". kafkahandler This time it’s in the kafka.props file: gg.handler.kafkahandler.Type = kafka Should be gg.handler.kafkahandler.type = kafka No capital T in Type! (Image credit: https://unsplash.com/@vanschneider)

In the documentation for the current release of Oracle GoldenGate for Big Data (12.2.0.1.1.011) there’s a helpful sample configuration, which isn’t so helpful … [...] gg.handler.kafkahandler.ProducerRecordClass = com.company.kafka.CustomProducerRecord [...] This value for gg.handler.kafkahandler.ProducerRecordClass will cause a failure when you start the replicat: [...] Class not found: "com.company.kafka.CustomProducerRecord" [...] If you comment this configuration item out, it’ll use the default (oracle.goldengate.handler.kafka.DefaultProducerRecord) and work swimingly! (Image credit: https://unsplash.com/@vanschneider)