kafka消费不到远程bootstrap-server 数据

问题

执行 ./bin/kafka-console-consumer.sh --bootstrap-server 10.10.151.12:6667 --topic flink_test
取不到数据没有任何返回，也没有报错

解决

使用./bin/kafka-console-consumer.sh --zookeeper 10.10.151.12:2181 --topic flink_test
终于看到报错信息了

[2020-12-02 10:06:41,087] WARN [console-consumer-73229_localhost.localdomain-1606874800409-65d73e12-leader-finder-thread]: Failed to add leader for partitions flink_test-5,flink_test-16,flink_test-2,flink_test-13,flink_test-21,flink_test-10,flink_test-15,flink_test-4,flink_test-7,flink_test-18,flink_test-1,flink_test-23,flink_test-12,flink_test-20,flink_test-9,flink_test-6,flink_test-17,flink_test-22,flink_test-3,flink_test-14,flink_test-19,flink_test-8,flink_test-0,flink_test-11; will retry (kafka.consumer.ConsumerFetcherManager$LeaderFinderThread)
java.nio.channels.ClosedChannelException
	at kafka.network.BlockingChannel.send(BlockingChannel.scala:112)
	at kafka.consumer.SimpleConsumer.liftedTree1$1(SimpleConsumer.scala:101)
	at kafka.consumer.SimpleConsumer.kafka$consumer$SimpleConsumer$$sendRequest(SimpleConsumer.scala:86)
	at kafka.consumer.SimpleConsumer.getOffsetsBefore(SimpleConsumer.scala:152)
	at kafka.consumer.SimpleConsumer.earliestOrLatestOffset(SimpleConsumer.scala:191)
	at kafka.consumer.ConsumerFetcherThread.handleOffsetOutOfRange(ConsumerFetcherThread.scala:92)
	at kafka.server.AbstractFetcherThread$$anonfun$7.apply(AbstractFetcherThread.scala:243)
	at kafka.server.AbstractFetcherThread$$anonfun$7.apply(AbstractFetcherThread.scala:240)
	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
	at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
	at scala.collection.immutable.HashMap$HashMap1.foreach(HashMap.scala:221)
	at scala.collection.immutable.HashMap$HashTrieMap.foreach(HashMap.scala:428)
	at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
	at scala.collection.AbstractTraversable.map(Traversable.scala:104)
	at kafka.server.AbstractFetcherThread.addPartitions(AbstractFetcherThread.scala:240)
	at kafka.server.AbstractFetcherManager$$anonfun$addFetcherForPartitions$2.apply(AbstractFetcherManager.scala:97)
	at kafka.server.AbstractFetcherManager$$anonfun$addFetcherForPartitions$2.apply(AbstractFetcherManager.scala:85)
	at scala.collection.TraversableLike$WithFilter$$anonfun$foreach$1.apply(TraversableLike.scala:733)
	at scala.collection.immutable.Map$Map3.foreach(Map.scala:161)
	at scala.collection.TraversableLike$WithFilter.foreach(TraversableLike.scala:732)
	at kafka.server.AbstractFetcherManager.addFetcherForPartitions(AbstractFetcherManager.scala:85)
	at kafka.consumer.ConsumerFetcherManager$LeaderFinderThread.doWork(ConsumerFetcherManager.scala:96)
	at kafka.utils.ShutdownableThread.run(ShutdownableThread.scala:64)

修改/etc/hosts文件

10.10.151.11 test01
10.10.151.12 test02
10.10.151.13 test03

重新执行./bin/kafka-console-consumer.sh --bootstrap-server 10.10.151.12:6667 --topic flink_test
成功获取数据

原因分析

1.原来kafka消费者和kafka server 在一个集群中hosts文件都一样，所以没有问题。
2.新的kafka消费者是我新加的一个机器，是独立于集群的，但是需要消费集群中部分数据做实验用
3.集群中的kafka配置中使用的的是hostname，所以新加的机器没有配hosts就连接不上
4.kafka版本比较老了是1.0.0，但是我们项目定版了，这个版就要用1.0.0版防止冲突，下个版本我在升级一下吧。