Hello, I am prototyping Kafka replication with Mirror Maker 2. At the beginning, I had hard times with org.apache.kafka.connect.errors.ConnectException: Error while attempting to create/find topic(s) 'mm2-offsets.dst.internal'... Caused by: java.util.concurrent.ExecutionException: org.apache.kafka.common.errors.InvalidReplicationFactorException: Replication factor: 3 larger than available brokers: 1. ... Caused by: org.apache.kafka.common.errors.InvalidReplicationFactorException: Replication factor: 3 larger than available brokers: 1. I managed to find the settings to put in mm2.properties (offset.storage.replication.factor=1), and discovered 6 internal topics.
But it raises broader questions: What internal topics should I expect with MM2? What are their purpose? On which side of the replicator (source, target or both) are they? How can I tune them (topic name, replication factor...)? And more generally where can I find a mm2.properties settings documentation? Thanks for your help, Gérald
