Spring Boot App拒绝连接到Kafka经纪人

Question

所以我最近才开始使用Kafka，出于某种奇怪的原因，尽管kafka和zookeeper服务器容器按照文档中的预期运行并通过使用docker ps命令运行。我不断收到此特定错误

我已经尝试使用不同的配置来解决此问题大约一个星期，但它仍然不断给我带来错误的无休止循环。

我遵循了这两个教程： https://rmoff.net/2018/08/02/kafka-listeners-explained/和https://www.youtube.com/watch?v=-0vrqMMGQbc

docker-compose up运行得很好，并且代理启动，但是当我启动mvn spring-boot：run命令时，它将失败。

我也尝试通过本地计算机更改地址，但仍然没有任何更改。希望能有所帮助

这是我的docker-compose.yml

version: '3.2'
services:
  zookeeper:
    container_name: zookeeper
    image: wurstmeister/zookeeper
    ports:
      - "2181:2181"
    environment:
      ZOOKEEPER_CLIENT_PORT: 2181
  kafka:
    container_name: kafka
    image: wurstmeister/kafka
    ports:
      - "9092:9092"
    environment:
      KAFKA_BROKER_ID: 1
      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181
      KAFKA_LISTENERS: INTERNAL://:19092,EXTERNAL://:9092
      KAFKA_ADVERTISED_LISTENERS: INTERNAL://kafka:19092
      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: INTERNAL:PLAINTEXT,EXTERNAL:PLAINTEXT
      KAFKA_INTER_BROKER_LISTENER_NAME: INTERNAL
      KAFKA_AUTO_CREATE_TOPICS_ENABLE: 'false'
    depends_on:
      - zookeeper
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock

这是我的应用程序。yml

# Server
server:
  port: 8090

# Spring Kafka & H2
spring:
  autoconfigure:
    exclude: org.springframework.boot.autoconfigure.kafka.KafkaAutoConfiguration
  kafka:
    bootstrap-servers: localhost:9092
  h2:
    console:
      enabled: true
      path: /h2
  datasource:
    url: jdbc:h2:mem:api;MODE=MySQL
    username: api
    password: root
    driverClassName: org.h2.Driver

result:
  topic.name: result

# Keycloak
keycloak:
  auth-server-url: http://localhost:8080/auth
  realm: demo
  resource: demo-api
  enabled: false
  public-client: false
  bearer-only : true
  principal-attribute: preferred_username
  allow-any-hostname: true

#  credentials:
#    secret:

# Logging
logging:
  level:
    org.springframework.web: DEBUG
    org.hibernate: DEBUG
    org: INFO
    com.API.demo.Controllers: DEBUG
  config: src/main/resources/logback-spring.xml
  file:
    path: logs/log

Answer 1

广告监听器的定义不正确

代替

  KAFKA_ADVERTISED_LISTENERS: INTERNAL://kafka:19092

您需要

  KAFKA_ADVERTISED_LISTENERS: INTERNAL://kafka:19092,EXTERNAL://localhost:9092

还请注意，如果您希望经纪人自动创建主题，则需要设置

  KAFKA_AUTO_CREATE_TOPICS_ENABLE: 'true'