k631583871 commented on issue #4: Can't start when there already exists a ObjectMapper bean URL: https://github.com/apache/rocketmq-spring/pull/4#issuecomment-447621496 > @k631583871 would you please provide your test scenario and error stack? is the producer or Consumer can not startup? 2018-12-16 14:38:18.567 ERROR [canal-elasticsearch,,,] 4736 --- [ main] o.s.boot.SpringApplication : Application run failed org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.rocketmq.spring.starter.internalRocketMQTransAnnotationProcessor' defined in class path resource [org/apache/rocketmq/spring/config/RocketMQAutoConfiguration.class]: Unsatisfied dependency expressed through method 'transactionAnnotationProcessor' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'transactionHandlerRegistry' defined in class path resource [org/apache/rocketmq/spring/config/RocketMQAutoConfiguration.class]: Unsatisfied dependency expressed through method 'transactionHandlerRegistry' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'rocketMQTemplate' defined in class path resource [org/apache/rocketmq/spring/config/RocketMQAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.rocketmq.spring.core.RocketMQTemplate]: Factory method 'rocketMQTemplate' threw exception; nested exception is java.lang.IllegalStateException: Can not inject null objectMapper into RocketMQTemplate! at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:769) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:509) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:204) at org.springframework.context.support.PostProcessorRegistrationDelegate.registerBeanPostProcessors(PostProcessorRegistrationDelegate.java:228) at org.springframework.context.support.AbstractApplicationContext.registerBeanPostProcessors(AbstractApplicationContext.java:707) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:531) at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:142) at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:775) at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:397) at org.springframework.boot.SpringApplication.run(SpringApplication.java:316) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1260) at org.springframework.boot.SpringApplication.run(SpringApplication.java:1248) at com.yunusas.canal.elasticsearch.CanalElasticsearchApplication.main(CanalElasticsearchApplication.java:16) Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'transactionHandlerRegistry' defined in class path resource [org/apache/rocketmq/spring/config/RocketMQAutoConfiguration.class]: Unsatisfied dependency expressed through method 'transactionHandlerRegistry' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'rocketMQTemplate' defined in class path resource [org/apache/rocketmq/spring/config/RocketMQAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.rocketmq.spring.core.RocketMQTemplate]: Factory method 'rocketMQTemplate' threw exception; nested exception is java.lang.IllegalStateException: Can not inject null objectMapper into RocketMQTemplate! at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:769) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:509) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:273) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1237) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ... 19 common frames omitted Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'rocketMQTemplate' defined in class path resource [org/apache/rocketmq/spring/config/RocketMQAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.rocketmq.spring.core.RocketMQTemplate]: Factory method 'rocketMQTemplate' threw exception; nested exception is java.lang.IllegalStateException: Can not inject null objectMapper into RocketMQTemplate! at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:627) at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:607) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1288) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1127) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:538) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:498) at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:320) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:318) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:273) at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1237) at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1164) at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:857) at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:760) ... 33 common frames omitted Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.rocketmq.spring.core.RocketMQTemplate]: Factory method 'rocketMQTemplate' threw exception; nested exception is java.lang.IllegalStateException: Can not inject null objectMapper into RocketMQTemplate! at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:622) ... 47 common frames omitted Caused by: java.lang.IllegalStateException: Can not inject null objectMapper into RocketMQTemplate! at org.apache.rocketmq.spring.config.RocketMQAutoConfiguration.rocketMQTemplate(RocketMQAutoConfiguration.java:86) at org.apache.rocketmq.spring.config.RocketMQAutoConfiguration$$EnhancerBySpringCGLIB$$bfb26471.CGLIB$rocketMQTemplate$3(<generated>) at org.apache.rocketmq.spring.config.RocketMQAutoConfiguration$$EnhancerBySpringCGLIB$$bfb26471$$FastClassBySpringCGLIB$$b58ca21.invoke(<generated>) at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:244) at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:363) at org.apache.rocketmq.spring.config.RocketMQAutoConfiguration$$EnhancerBySpringCGLIB$$bfb26471.rocketMQTemplate(<generated>) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ... 48 common frames omitted 你可以 添加一下代码就可以模拟当前情况（在引入 2.0.0版本时候）： @Bean public ObjectMapper objectMapper() { return new ObjectMapper(); }
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