WARN NetworkClient: [Consumer clientId=consumer-g1-1, groupId=g1] Error connecting to node
在Spark Streaming连接Kafka的时候出现了WARN NetworkClient: [Consumer clientId=consumer-g1-1, groupId=g1] Error connecting to node,记录一下,也给大家排坑。
首先介绍一下kafka的状况,kafka正常运行,开启了zk和kafka,可以正常创建topic,开生产者和消费者可以正常消费。
streaming代码在另一台机器上正常运行,但是换了电脑,环境明明一样,但是却无法消费,报错如下:
WARN NetworkClient: [Consumer clientId=consumer-g1-1, groupId=g1] Error connecting to node iZuf6fp7azbufaq6loxytsZ:9092 (id: 2147483647 rack: null)
java.net.UnknownHostException: iZuf6fp7azbufaq6loxytsZat java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:929)at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1324)at java.net.InetAddress.getAllByName0(InetAddress.java:1277)at java.net.InetAddress.getAllByName(InetAddress.java:1193)at java.net.InetAddress.getAllByName(InetAddress.java:1127)at org.apache.kafka.clients.ClientUtils.resolve(ClientUtils.java:110)at org.apache.kafka.clients.ClusterConnectionStates$NodeConnectionState.currentAddress(ClusterConnectionStates.java:403)at org.apache.kafka.clients.ClusterConnectionStates$NodeConnectionState.access$200(ClusterConnectionStates.java:363)at org.apache.kafka.clients.ClusterConnectionStates.currentAddress(ClusterConnectionStates.java:151)at org.apache.kafka.clients.NetworkClient.initiateConnect(NetworkClient.java:958)at org.apache.kafka.clients.NetworkClient.ready(NetworkClient.java:294)at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.tryConnect(ConsumerNetworkClient.java:575)at org.apache.kafka.clients.consumer.internals.AbstractCoordinator$FindCoordinatorResponseHandler.onSuccess(AbstractCoordinator.java:816)at org.apache.kafka.clients.consumer.internals.AbstractCoordinator$FindCoordinatorResponseHandler.onSuccess(AbstractCoordinator.java:796)at org.apache.kafka.clients.consumer.internals.RequestFuture$1.onSuccess(RequestFuture.java:206)at org.apache.kafka.clients.consumer.internals.RequestFuture.fireSuccess(RequestFuture.java:169)at org.apache.kafka.clients.consumer.internals.RequestFuture.complete(RequestFuture.java:129)at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient$RequestFutureCompletionHandler.fireCompletion(ConsumerNetworkClient.java:602)at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.firePendingCompletedRequests(ConsumerNetworkClient.java:412)at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:297)at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:236)at org.apache.kafka.clients.consumer.internals.ConsumerNetworkClient.poll(ConsumerNetworkClient.java:215)at org.apache.kafka.clients.consumer.internals.AbstractCoordinator.ensureCoordinatorReady(AbstractCoordinator.java:237)at org.apache.kafka.clients.consumer.internals.ConsumerCoordinator.poll(ConsumerCoordinator.java:485)at org.apache.kafka.clients.consumer.KafkaConsumer.updateAssignmentMetadataIfNeeded(KafkaConsumer.java:1268)at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1232)at org.apache.kafka.clients.consumer.KafkaConsumer.poll(KafkaConsumer.java:1165)at org.apache.spark.streaming.kafka010.DirectKafkaInputDStream.paranoidPoll(DirectKafkaInputDStream.scala:171)at org.apache.spark.streaming.kafka010.DirectKafkaInputDStream.start(DirectKafkaInputDStream.scala:259)at org.apache.spark.streaming.DStreamGraph.$anonfun$start$7(DStreamGraph.scala:55)at org.apache.spark.streaming.DStreamGraph.$anonfun$start$7$adapted(DStreamGraph.scala:55)at scala.collection.Iterator.foreach(Iterator.scala:943)at scala.collection.Iterator.foreach$(Iterator.scala:943)at scala.collection.AbstractIterator.foreach(Iterator.scala:1431)at scala.collection.parallel.ParIterableLike$Foreach.leaf(ParIterableLike.scala:974)at scala.collection.parallel.Task.$anonfun$tryLeaf$1(Tasks.scala:53)at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)at scala.util.control.Breaks$$anon$1.catchBreak(Breaks.scala:67)at scala.collection.parallel.Task.tryLeaf(Tasks.scala:56)at scala.collection.parallel.Task.tryLeaf$(Tasks.scala:50)at scala.collection.parallel.ParIterableLike$Foreach.tryLeaf(ParIterableLike.scala:971)at scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute(Tasks.scala:153)at scala.collection.parallel.AdaptiveWorkStealingTasks$WrappedTask.compute$(Tasks.scala:149)at scala.collection.parallel.AdaptiveWorkStealingForkJoinTasks$WrappedTask.compute(Tasks.scala:440)at java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:189)at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1067)at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1703)at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:172)
可以看到第一行重点是Error connecting to node iZuf6fp7azbufaq6loxytsZ:9092 ,其中乱码部分是我的服务器名称。
接下来是解决方法:
windows打开C:\Windows\System32\drivers\etc下的hosts文件(需要管理员权限),添加 : IP iZuf6fp7azbufaq6loxytsZ
注意中间有空格,这是将服务器IP与名字映射。
linux下打开/etc/hosts,同样的配置。
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