Errors related to Kafk API checks

I have a problem when I routinely run the following command line.
In addition, I am experiencing process hangs on one Broker at irregular intervals, but I do not know the relevance of the error content.
Has anyone had the same problem to help me?

○Kafka Broker Server Information
・3-unit cluster configuration
・Apache kafka version 3.2.1

bin/ --bootstrap-server kafka1:9092,kafka2:9092,kafka3:9092

ERROR admin-client-network-thread exited (kafka.admin.BrokerApiVersionsCommand$AdminClient)
org.apache.kafka.common.errors.DisconnectException: NetworkClient is no longer active, state is CLOSED