問題排查之RocketMQAutoConfiguration not loaded.

翎野君發表於2019-04-04
MQ

背景

今天將一個SpringBoot專案的配置引數從原有的.yml檔案遷移到Apollo後，啟動報錯

Bean method 'rocketMQTemplate' in 'RocketMQAutoConfiguration' not loaded because @ConditionalOnBean (types: org.apache.rocketmq.client.producer.DefaultMQProducer; SearchStrategy: all) did not find any beans of type org.apache.rocketmq.client.producer.DefaultMQProducer

花了兩個小時才最終搞清楚，原因是缺少了配置項 spring.rocketmq.producer.group 從而導致無法成功建立RocketMQAutoConfiguration這個Bean，從而導致一連串對此有依賴的Bean無法建立成功。

排查過程

啟動的錯誤日誌

2019-04-02 15:21:33.689  WARN 17516 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'myServiceAImpl': Unsatisfied dependency expressed through field 'myServiceBImpl'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'myServiceAImpl': Unsatisfied dependency expressed through field 'rocketMQTemplate'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.apache.rocketmq.spring.starter.core.RocketMQTemplate' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
2019-04-02 15:21:33.692  INFO 17516 --- [           main] com.alibaba.druid.pool.DruidDataSource   : {dataSource-1} closed
2019-04-02 15:21:33.693  INFO 17516 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Shutting down ExecutorService
2019-04-02 15:21:33.693  INFO 17516 --- [           main] f.a.ReferenceAnnotationBeanPostProcessor : class com.alibaba.dubbo.config.spring.beans.factory.annotation.ReferenceAnnotationBeanPostProcessor was destroying!
2019-04-02 15:21:33.702  INFO 17516 --- [           main] ConditionEvaluationReportLoggingListener : 

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2019-04-02 15:21:33.842 ERROR 17516 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

Field rocketMQTemplate in net.yourpackage.myServiceBImpl required a bean of type 'org.apache.rocketmq.spring.starter.core.RocketMQTemplate' that could not be found.
	- Bean method 'rocketMQTemplate' in 'RocketMQAutoConfiguration' not loaded because @ConditionalOnBean (types: org.apache.rocketmq.client.producer.DefaultMQProducer; SearchStrategy: all) did not find any beans of type org.apache.rocketmq.client.producer.DefaultMQProducer


Action:

Consider revisiting the conditions above or defining a bean of type 'org.apache.rocketmq.spring.starter.core.RocketMQTemplate' in your configuration.
複製程式碼

問題原因

DefaultMQProducer

從上圖中可以看到RocketMQAutoConfiguration中的mqProducer方法會根據配置引數來建立DefaultMQProducer，其中有兩個必要的引數

  • spring.rocketmq.nameServer
  • spring.rocketmq.producer.group

在重新檢查了一遍配置檔案後發現，的確是因為漏掉了spring.rocketmq.producer.group，將其加上之後便可以成功啟動專案了。

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