仅标记为回滚的事务：如何找到原因

Question

我在@Transactional方法中提交事务时遇到问题：

methodA() {
    methodB()
}

@Transactional
methodB() {
    ...
    em.persist();
    ...
    em.flush();
    log("OK");
}

当我从methodA（）调用methodB（）时，该方法成功通过，并且可以在日志中看到“确定”。但后来我明白了

Could not commit JPA transaction; nested exception is javax.persistence.RollbackException: Transaction marked as rollbackOnly org.springframework.transaction.TransactionSystemException: Could not commit JPA transaction; nested exception is javax.persistence.RollbackException: Transaction marked as rollbackOnly
    at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:521)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:754)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:723)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:393)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:120)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:622)
    at methodA()...

1. 在异常中完全缺少methodB的上下文-我想可以吗？
2. methodB（）中的某些内容将事务标记为仅回滚？我如何找到它？例如，有没有一种方法可以检查类似的东西getCurrentTransaction().isRollbackOnly()?-这样，我可以逐步检查方法并找到原因。

Answer 1

我终于明白了这个问题：

methodA() {
    methodB()
}

@Transactional(noRollbackFor = Exception.class)
methodB() {
    ...
    try {
        methodC()
    } catch (...) {...}
    log("OK");
}

@Transactional
methodC() {
    throw new ...();
}

发生的是，即使methodB的注释正确，methodC但没有。引发异常后，第二个异常@Transactional将第一个事务标记为“仅回滚”。