How to view Kafka consumer groups?

To view Kafka consumer groups, you can use Kafka’s built-in command-line tool or operate through a programming language’s Kafka client.

Check consumer group using command line tools.

1. Open the terminal and navigate to the bin directory inside the Kafka installation directory.
2. Enter the following command: ./kafka-consumer-groups.sh –bootstrap-server –list
   This command will display a list of all consumer groups.

View consumer group with Kafka client using programming language.

1. Import a Kafka client library, such as the kafka-clients library in Java.
2. Create a KafkaConsumer object and set up the necessary parameters.
3. Invoking the consumer.listGroups() method will return a collection of ConsumerGroupListing objects, which includes all consumer group information.
4. By iterating through the ConsumerGroupListing collection, you can access detailed information about each consumer group, such as group ID and number of consumers.

It is important to note that all of the above methods require ensuring that the Kafka server is up and running and that the corresponding consumer group is properly configured.