Why kafka consumer always Re-joining group?

Elastic Stack Logstash
1

Logstash version: 6.3.0

Here is the log, and this info is always repeating:

[2021-03-11T20:25:47,359][INFO ][org.apache.kafka.clients.consumer.internals.AbstractCoordinator] [Consumer clientId=logstash-0, groupId=nginx-log] (Re-)joining group
[2021-03-11T20:25:47,685][INFO ][org.apache.kafka.clients.consumer.internals.AbstractCoordinator] [Consumer clientId=logstash-0, groupId=nginx-log] Successfully joined group with generation 6560
[2021-03-11T20:25:47,689][INFO ][org.apache.kafka.clients.consumer.internals.ConsumerCoordinator] [Consumer clientId=logstash-0, groupId=nginx-log] Setting newly assigned partitions [nginx-log-radar-3, ...]

Is this normal?

2

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