为了处理kafka故障，我使用了apache curator框架和以下解决方法：

val client: CuratorFramework = ... // see docs
val zk: CuratorZookeeperClient = client.getZookeeperClient

/**
  * This method returns false if kafka or zookeeper is down.
  */ 
def isKafkaAvailable:Boolean = 
   Try {
      if (zk.isConnected) {
        val xs = client.getChildren.forPath("/brokers/ids")
        xs.size() > 0
      }
      else false
    }.getOrElse(false)

对于Kafka主题，我使用 com.softwaremill.reactivekafka 图书馆。例如：

class KafkaConsumerActor extends Actor {
   val kafka = new ReactiveKafka()
   val config: ConsumerProperties[Array[Byte], Any] = ... // see docs

   override def preStart(): Unit = {
      super.preStart()

      val publisher = kafka.consume(config)
      Source.fromPublisher(publisher)
            .map(handleKafkaRecord)
            .to(Sink.ignore).run()
   }

   /**
     * This method will be invoked when any kafka records will happen.
     */
   def handleKafkaRecord(r: ConsumerRecord[Array[Byte], Any]) = {
      // handle record
   }
}