[FIXED] Why tx annotation-driven make a conflict?

Issue

Hi everyone I working with Spring MVC and I have a question.

I have this bean definition for transaction:

<tx:annotation-driven transaction-manager="txManager"/>

    <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"/>
    </bean>

But when I run my application I've got this exception:

2019-05-24 18:14:51 DEBUG o.s.b.d.LoggingFailureAnalysisReporter - Application failed to start due to an exception org.springframework.beans.factory.support.BeanDefinitionOverrideException: Invalid bean definition with name 'org.springframework.transaction.config.internalTransactionAdvisor' defined in class path resource [org/springframework/transaction/annotation/ProxyTransactionManagementConfiguration.class]: Cannot register bean definition [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration; factoryMethodName=transactionAdvisor; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/transaction/annotation/ProxyTransactionManagementConfiguration.class]] for bean 'org.springframework.transaction.config.internalTransactionAdvisor': There is already [Root bean: class [org.springframework.transaction.interceptor.BeanFactoryTransactionAttributeSourceAdvisor]; scope=; abstract=false; lazyInit=false; autowireMode=0; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=null; factoryMethodName=null; initMethodName=null; destroyMethodName=null] bound. at org.springframework.beans.factory.support.DefaultListableBeanFactory.registerBeanDefinition(DefaultListableBeanFactory.java:897) at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForBeanMethod(ConfigurationClassBeanDefinitionReader.java:274) at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitionsForConfigurationClass(ConfigurationClassBeanDefinitionReader.java:141) at org.springframework.context.annotation.ConfigurationClassBeanDefinitionReader.loadBeanDefinitions(ConfigurationClassBeanDefinitionReader.java:117) at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:327) at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:232) at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:275) at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:95) at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:705) 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)

When I commented tx:annotation-drive everything fine but method with @Transactional annotation didn't work. What am I doing wrong?

My gradle dependencies:

compile group: 'org.springframework', name: 'spring-web', version: '5.1.5.RELEASE'
    compile group: 'org.springframework', name: 'spring-webmvc', version: '5.1.5.RELEASE'
    compile group: 'org.springframework.boot', name: 'spring-boot-starter-web', version: '2.1.3.RELEASE'
compile group: 'org.springframework', name: 'spring-jdbc', version: '5.1.5.RELEASE'

Solution

What you need to do is enable Bean Overriding. As of Spring 2.1 this is disabled by default. You are getting an exception because there is already a bean defined with the same name.

Spring 2.1 release note excerpt: Release note 2.1 - Bean Overriding

Long story short, you need to add this to your application.properties file:

spring.main.allow-bean-definition-overriding=true

Or in yaml:

spring:
   main:
     allow-bean-definition-overriding: true

Answered By - Shababb Karim