Storm 執行異常 java.lang.RuntimeException: java.nio.channels.UnresolvedAddressException 問題解決

最近寫的 binlog2kafka storm job 上線在一個新的集羣環境中(storm 0.9.0.1, kafka 0.8), storm job 運行時報出以下異常:

java.lang.RuntimeException: java.nio.channels.UnresolvedAddressException
    at storm.kafka.ZkCoordinator.refresh(ZkCoordinator.java:83)
    at storm.kafka.ZkCoordinator.getMyManagedPartitions(ZkCoordinator.java:45)
    at storm.kafka.KafkaSpout.nextTuple(KafkaSpout.java:118)
    at backtype.storm.daemon.executor$eval3848$fn__3849$fn__3864$fn__3893.invoke(executor.clj:562)
    at backtype.storm.util$async_loop$fn__384.invoke(util.clj:433)
    at clojure.lang.AFn.run(AFn.java:24)
    at java.lang.Thread.run(Thread.java:701)
Caused by: java.nio.channels.UnresolvedAddressException
    at sun.nio.ch.Net.checkAddress(Net.java:89)
    at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:514)
    at kafka.network.BlockingChannel.connect(BlockingChannel.scala:57)
    at kafka.consumer.SimpleConsumer.connect(SimpleConsumer.scala:44)
    at kafka.consumer.SimpleConsumer.getOrMakeConnection(SimpleConsumer.scala:129)
    at kafka.consumer.SimpleConsumer.kafka$consumer$SimpleConsumer$$sendRequest(SimpleConsumer.scala:69)
    at kafka.consumer.SimpleConsumer.getOffsetsBefore(SimpleConsumer.scala:125)
    at kafka.javaapi.consumer.SimpleConsumer.getOffsetsBefore(SimpleConsumer.scala:80)
    at storm.kafka.KafkaUtils.getOffset(KafkaUtils.java:55)
    at storm.kafka.KafkaUtils.getOffset(KafkaUtils.java:45)
    at storm.kafka.PartitionManager.(PartitionManager.java:77)
    at storm.kafka.ZkCoordinator.refresh(ZkCoordinator.java:78)
    ... 6 more

 

網上查了一下, 不少答案答非所問, 最後在github的kafkaSpout的做者的Issue List中找到了答案, 順利解決 https://github.com/wurstmeister/storm-kafka-0.8-plus/issues/36

 

問題在於: storm kafkaSpout 經過ZK去獲取kafka的地址, 可是zk中保存的kafka是以域名的方式保存的, 而新集羣上沒有配置相關的hosts, 因此只須要在新集羣的supervior機器上的/etc/hosts加上對應的kafka hosts便可