title: Exactly one of whitelist/blacklist/topic is required
body: <p>I am trying to start Kafka consumer but it is showing below error:</p>
  
  <pre><code>$ bin/kafka-console-consumer.sh --zookeeper localhost:2181 —topic Hello-Kafka 
  Exactly one of whitelist/blacklist/topic is required.
  Option                                  Description                            
  ------                                  -----------                            
  --blacklist &lt;blacklist&gt;                 Blacklist of topics to exclude from    
                                            consumption.                         
  --bootstrap-server &lt;server to connect                                          
    to&gt;                                                                          
  --consumer.config &lt;config file&gt;         Consumer config properties file.       
  --csv-reporter-enabled                  If set, the CSV metrics reporter will  
                                            be enabled                           
  --delete-consumer-offsets               If specified, the consumer path in     
                                            zookeeper is deleted when starting up
  
  ............
  ............
  </code></pre>