ClassCastException on kafka Producer

[Yulia Stolin <yu...@amobee.com>]

Hi,

I'm trying to write some simple producer to that writes messages to kafka
I've downloaded kafka0.7

Run the kafka server, producer and consumer

Ø   bin/kafka-server-start.sh config/server.properties

Ø  bin/kafka-console-consumer.sh --zookeeper zooserver:2181 --topic test --from-beginning

Ø  bin/kafka-console-producer.sh --zookeeper zooserver:2181 --topic test
And everything working!

Then I've created simple consumer , and it is worked also.
SimpleConsumer consumer = new SimpleConsumer("172.21.110.134", 9092, 10000, 1024000);
...
ByteBufferMessageSet messages = consumer.fetch(fetchRequest);
System.out.println("consumed: " + Utils.toString(msg.message().payload(), "UTF-8"));

But the following producer always throws an error

ProducerConfig config = new ProducerConfig(props);
...
Producer<String, Message> producer = new Producer<String, Message>(config);
producer.send(new ProducerData<String, Message>("test", new Message("Hello World".getBytes())));

Exception in thread "main" java.lang.ClassCastException: kafka.message.Message cannot be cast to java.lang.String
                at kafka.serializer.StringEncoder.toMessage(Encoder.scala:30)
                at kafka.producer.ProducerPool$$anonfun$send$1$$anonfun$3$$anonfun$apply$1.apply(ProducerPool.scala:107)

I'm using the following maven dependencies
     <dependency>
          <groupId>com.twitter</groupId>
             <artifactId>kafka_2.9.2</artifactId>
             <version>0.7.0</version>
         </dependency>

        <dependency>
             <groupId>org.scala-lang</groupId>
             <artifactId>scala-library</artifactId>
             <version>2.9.2</version>
         </dependency>

What am I missing?