Loading balancing datacenter is not specified

DataStax Apache Kafka Connector fails to start because the load balancing DC is not configured.

The following error message occurs when the load balancing datacenter (loadBalancing.localDc) is not set in the configuration file.
org.apache.kafka.common.config.ConfigException: Invalid value [] for
          configuration contactPoints: When contact points is provided, loadBalancing.localDc must
          also be specified


The connector requires that you set the loadBalancing.localDc. DataStax Enterprise datacenter names are case-sensitive.

Check the datacenter name in the cluster by running nodetool status and verify that loadBalancing.localDc exactly matches. Datacenter names are case sensitive.