@Override public String toString() {
    return "KafkaWritable{"
        + "partition="
        + partition
        + ", offset="
        + offset
        + ", timestamp="
        + timestamp
        + ", value="
        + Arrays.toString(value)
        + ", recordKey="
        + Arrays.toString(recordKey)
        + '}';
  }
Writable implementation of Kafka ConsumerRecord.
Serialized in the form:
{@code timestamp} long| {@code partition} (int) | {@code offset} (long) | {@code value.size()} (int) |
{@code value} (byte []) | {@code recordKey.size()}| {@code recordKey (byte [])}
kafka-handler/src/java/org/apache/hadoop/hive/kafka/KafkaWritable.java