向 Kafka 主题发布消息时出错

Question

我是 Kafka 的新手，正在尝试为其设置环境。我正在尝试运行单个节点 Kafka，但我收到了错误。

按照 mac

上的以下步骤

1. brew install zookeeper
2. brew install kafka
3. zkServer start
4.  kafka-server-start.sh /usr/local/etc/kafka/server.properties
5.bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic test
6.bin/kafka-console-producer.sh --broker-list localhost:9092 --topic test 
This is a message

但我收到以下错误。请让我知道，如果我遗漏了什么

[2015-10-19 15:48:46,632] WARN Error while fetching metadata [{TopicMetadata for topic test -> 
No partition metadata for topic test due to kafka.common.LeaderNotAvailableException}] for topic [test]: class kafka.common.LeaderNotAvailableException  (kafka.producer.BrokerPartitionInfo)
[2015-10-19 15:48:46,637] WARN Error while fetching metadata [{TopicMetadata for topic test -> 
No partition metadata for topic test due to kafka.common.LeaderNotAvailableException}] for topic [test]: class kafka.common.LeaderNotAvailableException  (kafka.producer.BrokerPartitionInfo)
[2015-10-19 15:48:46,638] ERROR Failed to collate messages by topic, partition due to: Failed to fetch topic metadata for topic: test (kafka.producer.async.DefaultEventHandler)
[2015-10-19 15:48:46,746] WARN Error while fetching metadata [{TopicMetadata for topic test -> 
No partition metadata for topic test due to kafka.common.LeaderNotAvailableException}] for topic [test]: class kafka.common.LeaderNotAvailableException  (kafka.producer.BrokerPartitionInfo)
[2015-10-19 15:48:46,749] WARN Error while fetching metadata [{TopicMetadata for topic test -> 
No partition metadata for topic test due to kafka.common.LeaderNotAvailableException}] for topic [test]: class kafka.common.LeaderNotAvailableException  (kafka.producer.BrokerPartitionInfo)
[2015-10-19 15:48:46,749] ERROR Failed to collate messages by topic, partition due to: Failed to fetch topic metadata for topic: test (kafka.producer.async.DefaultEventHandler)
[2015-10-19 15:48:46,860] WARN Error while fetching metadata [{TopicMetadata for topic test -> 
No partition metadata for topic test due to kafka.common.LeaderNotAvailableException}] for topic [test]: class kafka.common.LeaderNotAvailableException  (kafka.producer.BrokerPartitionInfo)
[2015-10-19 15:48:46,863] WARN Error while fetching metadata [{TopicMetadata for topic test -> 
No partition metadata for topic test due to kafka.common.LeaderNotAvailableException}] for topic [test]: class kafka.common.LeaderNotAvailableException  (kafka.producer.BrokerPartitionInfo)
[2015-10-19 15:48:46,863] ERROR Failed to collate messages by topic, partition due to: Failed to fetch topic metadata for topic: test (kafka.producer.async.DefaultEventHandler)
[2015-10-19 15:48:46,973] WARN Error while fetching metadata [{TopicMetadata for topic test -> 
No partition metadata for topic test due to kafka.common.LeaderNotAvailableException}] for topic [test]: class kafka.common.LeaderNotAvailableException  (kafka.producer.BrokerPartitionInfo)
[2015-10-19 15:48:46,977] WARN Error while fetching metadata [{TopicMetadata for topic test -> 
No partition metadata for topic test due to kafka.common.LeaderNotAvailableException}] for topic [test]: class kafka.common.LeaderNotAvailableException  (kafka.producer.BrokerPartitionInfo)
[2015-10-19 15:48:46,977] ERROR Failed to collate messages by topic, partition due to: Failed to fetch topic metadata for topic: test (kafka.producer.async.DefaultEventHandler)
[2015-10-19 15:48:47,083] WARN Error while fetching metadata [{TopicMetadata for topic test -> 
No partition metadata for topic test due to kafka.common.LeaderNotAvailableException}] for topic [test]: class kafka.common.LeaderNotAvailableException  (kafka.producer.BrokerPartitionInfo)
[2015-10-19 15:48:47,084] ERROR Failed to send requests for topics test with correlation ids in [0,8] (kafka.producer.async.DefaultEventHandler)
[2015-10-19 15:48:47,086] ERROR Error in handling batch of 1 events (kafka.producer.async.ProducerSendThread)
kafka.common.FailedToSendMessageException: Failed to send messages after 3 tries.
    at kafka.producer.async.DefaultEventHandler.handle(DefaultEventHandler.scala:90)
    at kafka.producer.async.ProducerSendThread.tryToHandle(ProducerSendThread.scala:105)
    at kafka.producer.async.ProducerSendThread$$anonfun$processEvents.apply(ProducerSendThread.scala:88)
    at kafka.producer.async.ProducerSendThread$$anonfun$processEvents.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)

谢谢

Answer 1

Alok，这个很常见的端口和主机问题。
您能否确认 Zookeeper 和 Kafka Broker 的主机和端口。我假设您已经在本地配置了 Kafka，因此请确保您提供了正确的主机名。

运行使用以下命令确保 Zookeeper 和 Kafka Broker 运行在您在命令中提到的端口上：

netstat -a | grep port

如果您仍然遇到任何问题，请告诉我。

Answer 2

尝试像使用 kafka 一样使用正确的配置启动 zookeeper：

bin/zookeeper-server-start.sh config/zookeeper.properties

您可以删除经纪人日志，然后重试：

rm -R /tmp/kafka-logs (default location)

如果仍有问题，请检查日志。

Answer 3

我这边的问题已通过将值 localhost 设置为 config/server.properties 文件中的以下属性得到解决：

host.name
advertised.host.name

Answer 4

我通过更改 server.properties 文件中的 host.name 属性解决了这个问题。默认情况下，它被注释掉并指向本地机器。所以，如果你想在本地启动 kafka，只需取消注释即可。意义 - host.name=本地主机

Answer 5

我已将本地主机设置为 127.0.0.1 以在 server.properties

中解决此问题

Answer 6

使用Kafka broker时，zookeeper是必不可少的。您必须先启动 zookeeper-server，然后再启动 kafka-server。

对端口非常小心，何时使用 zookeeper port，何时使用 kafka broker port

如果您收到与元数据相关的任何异常，请检查您的主题是否存在于代理中。

./kafka-topics.sh --zookeeper <host>:<port> --describe --topic <topic-name>

主题和消费者使用 zookeeper 端口（服务），消费者使用 kafka 代理。

向 Kafka 主题发布消息时出错

Error in Publishing message to Kafka topic

apache-kafka

kafka-producer-api

apache-zookeeper