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解决报错:JPA No EntityManager with actual transaction available for current thread

作者:互联网

1.发生场景

报错发生的情况是这样,在service中,先调用了JPA的 deleteAllByxxx 方法,再调用JPA的 save 方法插入了新的数据。

报错信息如下:

"javax.persistence.TransactionRequiredException: No EntityManager with actual transaction available for current thread - cannot reliably process 'remove' call
	at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:282)
	at com.sun.proxy.$Proxy91.remove(Unknown Source)
	at org.springframework.data.jpa.repository.query.JpaQueryExecution$DeleteExecution.doExecute(JpaQueryExecution.java:276)
	at org.springframework.data.jpa.repository.query.JpaQueryExecution.execute(JpaQueryExecution.java:87)
	at org.springframework.data.jpa.repository.query.AbstractJpaQuery.doExecute(AbstractJpaQuery.java:116)
	at org.springframework.data.jpa.repository.query.AbstractJpaQuery.execute(AbstractJpaQuery.java:106)
	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:499)
	at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:477)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
	at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:56)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
......

2.解决方法

在对应的Service或组件上添加@Transactional,或者在JPA的 deleteAllByxxx 方法上添加也可以,根据具体业务场景来选择添加事务注解的位置。

ps:

1. flush()可手动地控制将实体类中的数据推到数据库,不知道好不好用,某些特殊场景可能用的上,记录一下

2. 不知道如果使用alibaba规范插件能不能检测出来

 

标签:available,EntityManager,java,repository,jpa,springframework,报错,org,data
来源: https://www.cnblogs.com/feng-gamer/p/14852918.html