当前,我将Maven与io.fabric8 docker-maven-plugin一起使用,以自动启动Kafka和ZooKeeper。这是我目前的配置,效果很好:
<properties>
<zookeeper.port>2181</zookeeper.port>
<kafka.host>127.0.0.1</kafka.host>
<kafka.port>9092</kafka.port>
</properties>
<plugin>
<groupId>io.fabric8</groupId>
<artifactId>docker-maven-plugin</artifactId>
<version>${docker-maven-plugin.version}</version>
<configuration>
<showLogs>true</showLogs>
<images>
<image>
<name>wurstmeister/zookeeper:${zookeeper.version}</name>
<alias>zookeeper</alias>
<run>
<ports>
<port>${zookeeper.port}:2181</port>
</ports>
</run>
</image>
<image>
<name>wurstmeister/kafka:${kafka.version}</name>
<alias>kafka</alias>
<run>
<ports>
<port>${kafka.port}:9092</port>
</ports>
<links>
<link>zookeeper:zookeeper</link>
</links>
<env>
<KAFKA_ADVERTISED_HOST_NAME>${local.ip}
</KAFKA_ADVERTISED_HOST_NAME>
<KAFKA_ADVERTISED_PORT>${kafka.port}</KAFKA_ADVERTISED_PORT>
<KAFKA_ZOOKEEPER_CONNECT>zookeeper:2181</KAFKA_ZOOKEEPER_CONNECT>
<KAFKA_MESSAGE_MAX_BYTES>15000000</KAFKA_MESSAGE_MAX_BYTES>
</env>
</run>
</image>
<image>
<name>confluentinc/cp-ksql-server:5.0.0</name>
<alias>cp-ksql-server</alias>
<run>
<ports>
<port>8088:8088</port>
</ports>
<links>
<link>kafka:kafka</link>
</links>
<env>
<KSQL_BOOTSTRAP_SERVERS>${local.ip}:9092</KSQL_BOOTSTRAP_SERVERS>
<KSQL_LISTENERS>http://0.0.0.0:8088/</KSQL_LISTENERS>
<KSQL_KSQL_SERVICE_ID>confluent_test_2</KSQL_KSQL_SERVICE_ID>
</env>
</run>
</image>
</images>
</configuration>
</plugin>
现在我需要更多的灵活性和监视工具,以便能够正确分析我的本地Kafka实例,这就是为什么我决定开始使用多合一融合平台https://docs.confluent.io/current/quickstart/ce-docker-quickstart.html
我执行了以上文档中描述的步骤,并且能够通过以下docker-compose up -d
https://github.com/confluentinc/cp-docker-images/tree/master/examples/cp-all-in-one上的docker-compose.yml
命令运行Confluent Platform。之后,我可以访问http://localhost:9021
我的应用程序也已启动,但是消息没有正确发送或使用。这是日志:
2018-08-25 20:54:33.786 INFO 11304 --- [nio-8080-exec-1] o.a.kafka.common.utils.AppInfoParser : Kafka version : 1.1.0
2018-08-25 20:54:33.786 INFO 11304 --- [nio-8080-exec-1] o.a.kafka.common.utils.AppInfoParser : Kafka commitId : fdcf75ea326b8e07
2018-08-25 20:54:33.794 INFO 11304 --- [ad | producer-1] org.apache.kafka.clients.Metadata : Cluster ID: NCbZ7abTTdu6SQHhthMbIw
2018-08-25 20:54:33.827 INFO 11304 --- [nio-8080-exec-1] c.p.domain.service.post.PostServiceImpl : Message sent to the post creation queue: Post [id=5b8197d9e67db62c28ebe8d5, status=PENDING, externalPostId=2bdbd597-cc30-4478-b946-e873c8d53eec, chatName= ....]
2018-08-25 20:55:03.875 ERROR 11304 --- [ad | producer-1] o.s.k.support.LoggingProducerListener : Exception thrown when sending a message with key='null' and payload='Post [id=5b8197d9e67db62c28ebe8d5, status=PENDING, externalPostId=2bdbd597-cc30-4478-b946-e873c8d53e...' to topic post.send:
org.apache.kafka.common.errors.TimeoutException: Expiring 1 record(s) for post.send-0: 30047 ms has passed since batch creation plus linger time
我可以在那里看到我的主题
那里可能有什么问题以及如何解决?
已更新
我在应用程序中启用了Kafka上的DEBUG日志,现在可以看到以下错误:
java.io.IOException: Can't resolve address: broker:9092
at org.apache.kafka.common.network.Selector.doConnect(Selector.java:235) ~[kafka-clients-1.1.0.jar:na]
at org.apache.kafka.common.network.Selector.connect(Selector.java:214) ~[kafka-clients-1.1.0.jar:na]
at org.apache.kafka.clients.NetworkClient.initiateConnect(NetworkClient.java:793) [kafka-clients-1.1.0.jar:na]
at org.apache.kafka.clients.NetworkClient.ready(NetworkClient.java:230) [kafka-clients-1.1.0.jar:na]
at org.apache.kafka.clients.admin.KafkaAdminClient$AdminClientRunnable.sendEligibleCalls(KafkaAdminClient.java:792) [kafka-clients-1.1.0.jar:na]
at org.apache.kafka.clients.admin.KafkaAdminClient$AdminClientRunnable.run(KafkaAdminClient.java:1002) [kafka-clients-1.1.0.jar:na]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_171]
Caused by: java.nio.channels.UnresolvedAddressException: null
at sun.nio.ch.Net.checkAddress(Net.java:101) ~[na:1.8.0_171]
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:622) ~[na:1.8.0_171]
at org.apache.kafka.common.network.Selector.doConnect(Selector.java:233) ~[kafka-clients-1.1.0.jar:na]
... 6 common frames omitted
答案 0 :(得分:1)
无法解析地址:经纪人:9092
Kafka正在将其了解的听众返回给客户
KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT
KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://broker:9092,PLAINTEXT_HOST://localhost:29092
基本上,bootstrap.servers
仅需要至少一个地址,但是其余的Kafka群集地址将返回给客户端,以便建立与各个代理的连接。
当您在Docker网络外部连接到localhost:9092
时,可以使用Docker端口转发,但随后Kafka返回您的客户端broker:9092
,并且由于未设置而导致客户端断开连接主机和Docker网络之间的DNS(除非使用Docker Swarm,否则不需要。)
您的解决方案将是两个选择
localhost:29092
,事情可能会开始更好地工作kafka:9092
参考(这类似于您的KSQL和Control Center容器的工作方式)