Question

I have a consumer group that consumes a lot of topics, he suddenly stops consuming a certain topic, but this topic is consumed by other consumer groups, how do I get this consumer group to unsubscribe from this topic?

best practices

I want to use a consumer group to consume many topics, but this will cause the coordinator to cause a lot of connections, and the metadata obtained each time will be very large. In order to ensure performance and Kafka stability, how many topics should a consumer consume?