In order to prevent Kafka rebalancing, I want to increase max.poll.interval.ms and decrease max.poll.records.
Also, I understand that by default is configured to:
max.poll.records = 500
max.poll.interval.ms = 300000
What I am not sure about is how to check these configurations on an existing instance of the Kafka consumer.
Assuming you are using a JVM-based client, then all ConsumerConfig properties are printed from log4j upon Consumer instantiation, so ensure your logging client is setup properly.
For any other client, you'd have to dig into the source-code for the defaults, assuming they would be overridden.