The Kafka cluster section displays the status of the servers on which Kafka is configured. This section displays the hostname and IP address of the server and also displays the status of the Kafka Broker, Kafka Connect and Schema Registry services. The statuses displayed are as follows:
Up: indicates that all servers are up.
Down: if at least one server is down in the zone, then based on the replication factor the relevant status is displayed. For example, the status is displayed as down if at least one server is down in a three node cluster with replication factor being 0.
Warning: if at least one server is down in the zone, then based on the replication factor the relevant status is displayed. For example, the status is displayed as warning if at least one server is down in a three node cluster with replication factor being 1.
For more information on Kafka, see the Vertica Reference guide.