Question

我正在尝试在HDP上运行简单的kafka生产者消费者示例，但面临异常。

[2016-03-03 18:26:38,683] WARN Fetching topic metadata with correlation id 0 for topics [Set(page_visits)] from broker [BrokerEndPoint(0,sandbox.hortonworks.com,9092)] failed (kafka.client.ClientUtils$)
java.nio.channels.ClosedChannelException
        at kafka.network.BlockingChannel.send(BlockingChannel.scala:120)
        at kafka.producer.SyncProducer.liftedTree1$1(SyncProducer.scala:75)
        at kafka.producer.SyncProducer.kafka$producer$SyncProducer$$doSend(SyncProducer.scala:74)
        at kafka.producer.SyncProducer.send(SyncProducer.scala:115)
        at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:59)
        at kafka.producer.BrokerPartitionInfo.updateInfo(BrokerPartitionInfo.scala:82)
        at kafka.producer.async.DefaultEventHandler$$anonfun$handle$1.apply$mcV$sp(DefaultEventHandler.scala:68)
        at kafka.utils.CoreUtils$.swallow(CoreUtils.scala:89)
        at kafka.utils.Logging$class.swallowError(Logging.scala:106)
        at kafka.utils.CoreUtils$.swallowError(CoreUtils.scala:51)
        at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:68)
        at kafka.producer.async.ProducerSendThread.tryToHandle(ProducerSendThread.scala:105)
        at kafka.producer.async.ProducerSendThread$$anonfun$processEvents$3.apply(ProducerSendThread.scala:88)
        at kafka.producer.async.ProducerSendThread$$anonfun$processEvents$3.apply(ProducerSendThread.scala:68)
        at scala.collection.immutable.Stream.foreach(Stream.scala:547)
        at kafka.producer.async.ProducerSendThread.processEvents(ProducerSendThread.scala:67)
        at kafka.producer.async.ProducerSendThread.run(ProducerSendThread.scala:45)
[2016-03-03 18:26:38,688] ERROR fetching topic metadata for topics [Set(page_visits)] from broker [ArrayBuffer(BrokerEndPoint(0,sandbox.hortonworks.com,9092))] failed (kafka.utils.CoreUtils$)
kafka.common.KafkaException: fetching topic metadata for topics [Set(page_visits)] from broker [ArrayBuffer(BrokerEndPoint(0,sandbox.hortonworks.com,9092))] failed
        at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:73)
        at kafka.producer.BrokerPartitionInfo.updateInfo(BrokerPartitionInfo.scala:82)
        at kafka.producer.async.DefaultEventHandler$$anonfun$handle$1.apply$mcV$sp(DefaultEventHandler.scala:68)
        at kafka.utils.CoreUtils$.swallow(CoreUtils.scala:89)
        at kafka.utils.Logging$class.swallowError(Logging.scala:106)
        at kafka.utils.CoreUtils$.swallowError(CoreUtils.scala:51)
        at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:68)
        at kafka.producer.async.ProducerSendThread.tryToHandle(ProducerSendThread.scala:105)
        at kafka.producer.async.ProducerSendThread$$anonfun$processEvents$3.apply(ProducerSendThread.scala:88)
        at kafka.producer.async.ProducerSendThread$$anonfun$processEvents$3.apply(ProducerSendThread.scala:68)
        at scala.collection.immutable.Stream.foreach(Stream.scala:547)
        at kafka.producer.async.ProducerSendThread.processEvents(ProducerSendThread.scala:67)
        at kafka.producer.async.ProducerSendThread.run(ProducerSendThread.scala:45)
Caused by: java.nio.channels.ClosedChannelException
        at kafka.network.BlockingChannel.send(BlockingChannel.scala:120)
        at kafka.producer.SyncProducer.liftedTree1$1(SyncProducer.scala:75)
        at kafka.producer.SyncProducer.kafka$producer$SyncProducer$$doSend(SyncProducer.scala:74)
        at kafka.producer.SyncProducer.send(SyncProducer.scala:115)
        at kafka.client.ClientUtils$.fetchTopicMetadata(ClientUtils.scala:59)
        ... 12 more
[2016-03-03 18:26:38,693] WARN Fetching topic metadata with correlation id 1 for topics [Set(page_visits)] from broker [BrokerEndPoint(0,sandbox.hortonworks.com,9092)] failed (kafka.client.ClientUtils$)
java.nio.channels.ClosedChannelException

这是我用于制作人的命令。

./kafka-console-producer.sh --broker-list sandbox.hortonworks.com:9092  --topic page_visits

在进行谷歌搜索后，我发现需要在server.properties文件中添加advertised.host.name属性。这是我的server.properties文件。

# Generated by Apache Ambari. Thu Mar  3 18:12:50 2016

advertised.host.name=sandbox.hortonworks.com
auto.create.topics.enable=true
auto.leader.rebalance.enable=true
broker.id=0
compression.type=producer
controlled.shutdown.enable=true
controlled.shutdown.max.retries=3
controlled.shutdown.retry.backoff.ms=5000
controller.message.queue.size=10
controller.socket.timeout.ms=30000
default.replication.factor=1
delete.topic.enable=false
fetch.purgatory.purge.interval.requests=10000
host.name=sandbox.hortonworks.com
kafka.ganglia.metrics.group=kafka
kafka.ganglia.metrics.host=localhost
kafka.ganglia.metrics.port=8671
kafka.ganglia.metrics.reporter.enabled=true
kafka.metrics.reporters=org.apache.hadoop.metrics2.sink.kafka.KafkaTimelineMetricsReporter
kafka.timeline.metrics.host=sandbox.hortonworks.com
kafka.timeline.metrics.maxRowCacheSize=10000
kafka.timeline.metrics.port=6188
kafka.timeline.metrics.reporter.enabled=true
kafka.timeline.metrics.reporter.sendInterval=5900
leader.imbalance.check.interval.seconds=300
leader.imbalance.per.broker.percentage=10
listeners=PLAINTEXT://sandbox.hortonworks.com:6667
log.cleanup.interval.mins=10
log.dirs=/kafka-logs
log.index.interval.bytes=4096
log.index.size.max.bytes=10485760
log.retention.bytes=-1
log.retention.hours=168
log.roll.hours=168
log.segment.bytes=1073741824
message.max.bytes=1000000
min.insync.replicas=1
num.io.threads=8
num.network.threads=3
num.partitions=1
num.recovery.threads.per.data.dir=1
num.replica.fetchers=1
offset.metadata.max.bytes=4096
offsets.commit.required.acks=-1
offsets.commit.timeout.ms=5000
offsets.load.buffer.size=5242880
offsets.retention.check.interval.ms=600000
offsets.retention.minutes=86400000
offsets.topic.compression.codec=0
offsets.topic.num.partitions=50
offsets.topic.replication.factor=3
offsets.topic.segment.bytes=104857600
producer.purgatory.purge.interval.requests=10000
queued.max.requests=500
replica.fetch.max.bytes=1048576
replica.fetch.min.bytes=1
replica.fetch.wait.max.ms=500
replica.high.watermark.checkpoint.interval.ms=5000
replica.lag.max.messages=4000
replica.lag.time.max.ms=10000
replica.socket.receive.buffer.bytes=65536
replica.socket.timeout.ms=30000
socket.receive.buffer.bytes=102400
socket.request.max.bytes=104857600
socket.send.buffer.bytes=102400
zookeeper.connect=sandbox.hortonworks.com:2181
zookeeper.connection.timeout.ms=15000
zookeeper.session.timeout.ms=30000
zookeeper.sync.time.ms=2000

添加属性后，我得到相同的异常。

任何建议。

Answer 1

根据日志，kafka服务器（代理）似乎没有运行。代理服务器应首先运行。

生产者和消费者是客户端程序，它们也将与代理服务器和zookeeper进行交互。

在运行生产者或消费者之前，请检查代理和zookeeper是否成功运行。

运行服务器 ./kafka-server-start.sh ../config/server.properties 检查日志中是否有任何错误，如果没有错误，则开始向服务器发送消息。

检查zookeeper服务。

Answer 2

使用以下2行修改文件/usr/hdp/current/kafka-broker/config/server.properties

advertised.host.name=sandbox.hortonworks.com
listeners=PLAINTEXT://sandbox.hortonworks.com:6667,PLAINTEXT://0.0.0.0:6667

运行以下执行命令

 ./kafka-console-producer.sh --broker-list sandbox.hortonworks.com:6667 --topic tst2
 ./kafka-console-consumer.sh --zookeeper localhost:2181 --topic tst2 --from-beginning

用它工作正常

Answer 3

我有类似的问题。首先，我在Ambari中检查了Kafka经纪人的侦听器属性

也可以查看：

[root@sandbox bin]# cat /usr/hdp/current/kafka-broker/conf/server.properties  | grep listeners
listeners=PLAINTEXT://sandbox.hortonworks.com:6667

如您所见，Ambari将localhost替换为主机名，并且端口相同 - 6667。

然后我检查了那个经纪人真的在那个端口上听：

[root@sandbox bin]# netstat -tulpn | grep 6667
tcp        0      0 10.0.2.15:6667              0.0.0.0:*                   LISTEN      11137/java

下一步是启动制作人：

./kafka-console-producer.sh --broker-list 10.0.2.15:6667 --topic test

最后我推出了消费者：

 ./kafka-console-consumer.sh --zookeeper 10.0.2.15:2181 --topic test --from-beginning

在生产者一方按Enter键输入几个单词后，消费者收到了消息。

卡夫卡|无法将数据发布到代理 - ClosedChannelException

3 个答案: