title: Kafka confluent platform 3.3 WARN Connection to node -1 could not be established. Broker may not be available
body: <p>While starting Kafka standalone connector getting below error.</p>
  
  <pre><code> WARN Connection to node -1 could not be established. Broker may not be available. (org.apache.kafka.clients.NetworkClient:589)
  </code></pre>
  
  <p>Kafka server zookeeper and confluent platform zookeeper are running on different ports. While using both in a same port leads to port already in use error. </p>