Kafka Consumer Parameters Configuration

Kafka consumers can be configured with a variety of parameters to meet different needs. Here are some common ways to configure Kafka consumer parameters:

1. bootstrap.servers: specifies a comma-separated list of addresses for the Kafka cluster, such as “localhost:9092, localhost:9093”.
2. group.id: Specify the consumer’s consumer group. Consumers within the same group will share consumption partitions.
3. enable.auto.commit: Whether to enable automatic commitment of consumer offsets. If set to true, consumers will automatically commit consumer offsets at regular intervals. Default is true.
4. The time interval for automatically committing consumer offsets is set to 5000 milliseconds by default.
5. The key.deserializer is responsible for deserializing the message key and can be specified as StringDeserializer, IntegerDeserializer, etc.
6. value.deserializer: Deserializer for the message value, which can be specified as StringDeserializer, IntegerDeserializer, etc.
7. The minimum number of bytes to fetch in each message request. Default is 1.
8. fetch.max.wait.ms: The maximum time to wait for pulling messages. Default is 500.
9. The maximum number of records pulled in each poll. Default is 500.
10. The session.timeout.ms refers to the session timeout time between the consumer and the group coordinator. The default is 10000 milliseconds.

These parameters can be configured when creating a Kafka consumer through either the constructor or a configuration file. Depending on specific requirements, the numerical values of the parameters can be adjusted according to the documentation or actual circumstances.