Axon 4 - Kafka ext 4.0.RC3 出现启动错误

Question

低于设置，在使用 4.0-RC2 版本时它工作得很好。

但是当我们尝试使用最新版本 4.0.RC3 时出现启动错误。

***************************
APPLICATION FAILED TO START
***************************
Description:
A component required a bean named 'kafkaMessageSource' that could not be found.

build.gradle

compile "org.axonframework:axon-spring-boot-starter:4.0-RC3"
        configurations { compile.exclude module: 'axon-server-connector' }
        compile group: 'org.axonframework.extensions.kafka', name: 'axon-kafka', version: '4.0-RC3'
        compile 'org.apache.kafka:kafka-clients:2.0.1'

application.yml（命令）

axon:
  snapshot:
    trigger:
      treshold:
        order: 100
  kafka:
    default-topic: order-events
    producer:
      retries: 5
      bootstrap-servers: localhost:9092
      transaction-id-prefix: order-tx
    consumer:
      group-id: kafka-group,kafka-group2
      bootstrap-servers: localhost:9092
  distributed:
    enabled: true
  serializer:
    messages: xstream
  eventhandling:
    processors:
      command-processor:
        mode: tracking
        source: kafkaMessageSource

application.yml（投影）

axon:
  eventhandling:
    processors:
      kafka-group:
        mode: tracking
        source: kafkaMessageSource
  kafka:
    default-topic: order-events
    consumer:
      group-id: kafka-group
      bootstrap-servers: localhost:9092

Answer 1

Kafka 扩展 Kafka Extension provided by Axon are not compatible. This choice was made to have the freedom to adjust the API according to further findings. Hence why it's a release candidate and not a final release. This is stated on the GitHub page of the project and on the reference guide 页面的 RC2 和 RC2 之间的变化。

RC2 中使用的配置属性因此不与 RC3 兼容。查看参考指南（已与 RC3 一起扩展）以了解有关如何调整配置的更多细节。

Answer 2

问题是由于不兼容的源代码 - 版本。会坚持使用 4.0.RC2 版本。

Axon 4 - Kafka ext 4.0.RC3 出现启动错误

Axon 4 - Kafka ext 4.0.RC3 gives start up error

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