kafka 小案例【一】---设置但个消息集群

启动kafka服务

【 bin/kafka-server-start.sh config/server.properties 】

[root@zhangxs kafka_2.]# bin/kafka-server-start.sh config/server.properties
[-- ::,] INFO KafkaConfig values:
advertised.host.name = null
advertised.listeners = null
advertised.port = null
authorizer.class.name =
auto.create.topics.enable = true
auto.leader.rebalance.enable = true
background.threads =
broker.id =
broker.id.generation.enable = true
broker.rack = null
compression.type = producer
connections.max.idle.ms =
controlled.shutdown.enable = true
controlled.shutdown.max.retries =
controlled.shutdown.retry.backoff.ms =
controller.socket.timeout.ms =
create.topic.policy.class.name = null
default.replication.factor =
delete.topic.enable = false
fetch.purgatory.purge.interval.requests =
group.max.session.timeout.ms =
group.min.session.timeout.ms =
host.name =
inter.broker.listener.name = null
inter.broker.protocol.version = 0.10.-IV0
leader.imbalance.check.interval.seconds =
leader.imbalance.per.broker.percentage = 

（2）创建topic

bin/kafka-topics.sh --create --zookeeper 192.168.177.120: --replication-factor  --partitions  --topic test1

(3)查看指定服务的topic

[root@zhangxs kafka_2.]# bin/kafka-topics.sh --list --zookeeper 192.168.177.120:
[-- ::,] WARN Connected to an old server; r-o mode will be unavailable (org.apache.zookeeper.ClientCnxnSocket)
__consumer_offsets
test
test1

（4）启动生产者

./kafka-console-producer.sh --broker-list 192.168.177.120: --topic test1

（5）启动消费者

bin/kafka-console-consumer.sh --bootstrap-server 192.168.177.120: --topic test1 --from-beginning

 

在生产者输入

[root@zhangxs bin]# ./kafka-console-producer.sh --broker-list 192.168.177.120: --topic test1
zhangxs
hello kafka
meide
张姓^H

消费者收到消息

[root@zhangxs kafka_2.]# bin/kafka-console-consumer.sh --bootstrap-server 192.168.177.120: --topic test1 --from-beginning
zhangxs
hello kafka
meide
张姓

 

遇到问题

1：我在生产者输入消息，却抛出下面异常，

[-- ::,] ERROR Error when sending message to topic test1 with key: null, value:  bytes with error: (org.apache.kafka.clients.producer.internals.ErrorLoggingCallback)
org.apache.kafka.common.errors.TimeoutException: Failed to update metadata after  ms.

这个是因为，因为kafka中config/server.properties 文件默认配置的zk服务是localhost，而我的zk服务ip配置的是我的指定的ip。所以我的producer链接不上我的zk服务，所以更新不了元数据。 要保证你的producer的zk服务跟你 自己配置的zk服务是一致的