Consumer Group in Kafka [Video Tutorials]: Partitions and Consumers

In this video tutorial series, take a deeper look at the consumer group in Kafka with:

• 1 partition and 2 consumers
• 2 partitions and 2 consumers
• 3 partitions and 1 consumer

Consumer Group in Kafka With 1 Partition and 2 Consumers

In this first Apache Kafka tutorial, learn about Java Kafka consumer code with 1 partition and 2 consumers.

• Both consumers are registered to the same consumer group.
• One consumer will be sitting idle.
• The same partition cannot be assigned to multiple consumers in the same group.

Let's begin!

Consumer Group in Kafka With 2 Partitions and 2 Consumers

The following tutorial explains the Kafka consumer group with 2 partitions and 2 consumers.

• Both consumers are registered to the same consumer group.
• The same partition cannot be assigned to multiple consumers in the same group.

Consumer Group in Kafka with 3 Partitions and 1 Consumer

Now let's learn about 3 partitions and 1 consumer within consumer groups in Apache Kafka. 

• The message will be published to partition randomly.
• The message will be consumed by "consumer 1" in a round-robin.
• One consumer can consume messages from more than one partition.