A consumer subscribes to a topic. A consumer group consists of one or more consumers. Within a consumer group, each consumer can consume multiple partitions at the same time. Each partition can be consumed by one consumer at a time.
auto.create.groups.enable: a consumer group is automatically created when a consumer attempts to enter a group that does not exist.
- A consumer group is required before consuming messages when auto.create.groups.enable is false in Configuring Parameters. Otherwise, consumption will fail.
- A consumer group is created automatically before consuming messages when auto.create.groups.enable is true in Configuring Parameters.
Create a consumer group on the console.
Creating a consumer group on the console does not require an instance restart.
Notes and Constraints
- If auto.create.groups.enable is set to true, the consumer group status is EMPTY, and no offset has been submitted, the system automatically deletes the consumer group 10 minutes later.
- If auto.create.groups.enable is set to false, the system does not automatically delete consumer groups. You can manually delete them.
- If a consumer group has never committed an offset, the group will be deleted after the Kafka instance restarts.
Procedure
- Log in to the console.
- Click
in the upper left corner to select a region. Select the region where your Kafka instance is located.
- Click Service List and choose Application > Distributed Message Service. The Kafka instance list is displayed.
- Click the desired Kafka instance to view the instance details.
- In the navigation pane, choose Consumer Groups.
- Click Create Consumer Group.
- Set consumer group parameters by referring to Table 1 and click OK.
Table 1 Consumer group parameters Parameter
Description
Consumer Group Name
Enter 3 to 64 characters, starting with a letter or underscore (_). Use only letters, digits, periods (.), hyphens (-), and underscores (_).
If a consumer group name starts with a special character, for example, an underscore (_) or a number sign (#), monitoring data cannot be displayed.
View the new consumer group in the consumer group list.