各位大神,知道这个是啥问题吗?求解:

java.net.NoRouteToHostException: No route to host
        at sun.nio.ch.Net.connect(Native Method)
        at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:532)
        at kafka.network.BlockingChannel.connect(BlockingChannel.scala:57)
        at kafka.consumer.SimpleConsumer.connect(SimpleConsumer.scala:44)
        at kafka.consumer.SimpleConsumer.reconnect(SimpleConsumer.scala:57)
        at kafka.consumer.SimpleConsumer.liftedTree1$1(SimpleConsumer.scala:79)
        at kafka.consumer.SimpleConsumer.kafka$consumer$SimpleConsumer$$sendRequest(SimpleConsumer.scala:71)
        at kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply$mcV$sp(SimpleConsumer.scala:109)
        at kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply(SimpleConsumer.scala:109)
        at kafka.consumer.SimpleConsumer$$anonfun$fetch$1$$anonfun$apply$mcV$sp$1.apply(SimpleConsumer.scala:109)
        at kafka.metrics.KafkaTimer.time(KafkaTimer.scala:33)
        at kafka.consumer.SimpleConsumer$$anonfun$fetch$1.apply$mcV$sp(SimpleConsumer.scala:108)
        at kafka.consumer.SimpleConsumer$$anonfun$fetch$1.apply(SimpleConsumer.scala:108)
        at kafka.consumer.SimpleConsumer$$anonfun$fetch$1.apply(SimpleConsumer.scala:108)
        at kafka.metrics.KafkaTimer.time(KafkaTimer.scala:33)
        at kafka.consumer.SimpleConsumer.fetch(SimpleConsumer.scala:107)
        at kafka.server.AbstractFetcherThread.processFetchRequest(AbstractFetcherThread.scala:96)
        at kafka.server.AbstractFetcherThread.doWork(AbstractFetcherThread.scala:88)
        at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:51)

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