How to determine the number of partitions in Kafka?

The number of partitions in Kafka is determined when creating a topic and can be changed later using administrative tools.

To find out the current number of partitions for a specific topic, you can use the Kafka CLI command:

kafka-topics.sh --describe --topic <topic_name> --bootstrap-server <server_address>

The output will indicate the number of partitions and their distribution across brokers.

You can also programmatically obtain this information via the AdminClient API by calling the method to describe the topic and checking the number of partitions.