Inference service might display warning messages when kafka restarts

When Kafka is restarted, the inference service might display messages similar to the following:

WARN [2020-08-20 14:47:09,725] org.apache.kafka.clients.NetworkClient: [Producer clientId=producer-1] Connection to node 1 (/192.168.60.210:9092) could not be established. Broker may not be available.
WARN [2020-08-20 14:49:20,800] org.apache.kafka.clients.NetworkClient: [Producer clientId=producer-1] Connection to node 2 (/192.168.155.132:9092) could not be established. Broker may not be available.