apache-kafka - 将消息发布到 Kafka 主题时出错

Question

我是 Kafka 的新手，并尝试为它设置环境。
我正在尝试运行单节点 Kafka，但我遇到了错误。

在mac上按照以下步骤

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，如果我错过了什么

[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$$anonfun$processEvents$3.apply(ProducerSendThread.scala:88)
    at kafka.producer.async.ProducerSendThread$$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)

谢谢

Answer 1

Alok，这是端口和主机的非常常见的问题。
请您确认一下Zookeeper 和Kafka Broker 的HOST 和PORT。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 bellow 命令以确保 Zookeeper 和 Kafka Broker 在您在命令中提到的端口上运行:

netstat -a | grep port

如果您仍然遇到任何问题，请告诉我。