title: java Kafka producer error
body: <p>I made kafka java producer.
  but console said error. kafka server is on aws. and producer is on my mac.
  and yet kara server is reachable. When i send message from producer, kafka server shows "Accepted connection .. ".
  What is problem?</p>
  
  <pre><code>1 [main] INFO kafka.utils.VerifiableProperties - Verifying properties
  28 [main] INFO kafka.utils.VerifiableProperties - Property      metadata.broker.list is overridden to xxxxxx:9092
  28 [main] INFO kafka.utils.VerifiableProperties - Property serializer.class is overridden to kafka.serializer.StringEncoder
  137 [main] INFO kafka.client.ClientUtils$ - Fetching metadata from broker id:0,host: xxxxxx,port:9092 with correlation id 0 for 1 topic(s) Set(words_topic)
  189 [main] ERROR kafka.producer.SyncProducer - Producer connection to xxxxxx:9092 unsuccessful
  198 [main] WARN kafka.client.ClientUtils$ - Fetching topic metadata with correlation id 0 for topics [Set(words_topic)] from broker [id:0,host: xxxxxx,port:9092] failed
  199 [main] ERROR kafka.utils.Utils$ - fetching topic metadata for topics [Set(words_topic)] from broker [ArrayBuffer(id:0,host: xxxxxx,port:9092)] failed
  </code></pre>
  
  <p>And It's kafka console</p>
  
  <pre><code>[2015-01-27 05:23:33,767] DEBUG Accepted connection from /xxxxx on /xxxx:9092. sendBufferSize [actual|requested]: [212992|1048576] recvBufferSize [actual|requested]: [212992|1048576] (kafka.network.Acceptor)
  [2015-01-27 05:23:33,767] DEBUG Processor 1 listening to new connection from /xxxx:65307 (kafka.network.Processor)
  [2015-01-27 05:23:33,872] INFO Closing socket connection to /xxxx. (kafka.network.Processor)
  [2015-01-27 05:23:33,873] DEBUG Closing connection from /xxxx:65307 (kafka.network.Processor)
  </code></pre>
  
  <p>This is my code.</p>
  
  <pre><code>    Properties props = new Properties();
      props.put("metadata.broker.list", "?????:9092");
      props.put("serializer.class", "kafka.serializer.StringEncoder");
      ProducerConfig config = new ProducerConfig(props);
      Producer&lt;String, String&gt; producer = new Producer&lt;String, String&gt;(config);
  
      // Now we break each word from the paragraph
          for (String word :
              METAMORPHOSIS_OPENING_PARA.split("\\s")) {
          // Create message to be sent to "words_topic" topic with the word
          KeyedMessage&lt;String, String&gt; data =
                  new KeyedMessage&lt;String, String&gt;
                          ("words_topic", word);
          // Send the message
          producer.send(data);
      }
      System.out.println("Produced data");
      // close the producer
      producer.close();
  
  }
  
  // First paragraph from Franz Kafka's Metamorphosis
  private static String METAMORPHOSIS_OPENING_PARA =
          "One morning, when Gregor Samsa woke from troubled dreams, "
                  + "he found himself transformed in his bed into a horrible "
                  + "vermin. He lay on his armour-like back, and if he lifted "
                  + "his head a little he could see his brown belly, slightly "
                  + "domed and divided by arches into stiff sections.";
  </code></pre>