public static DataAccessException convertJpaAccessExceptionIfPossible(RuntimeException ex) {
        // Following the JPA specification, a persistence provider can also
        // throw these two exceptions, besides PersistenceException.
        if (ex instanceof IllegalStateException) {
            return new InvalidDataAccessApiUsageException(ex.getMessage(), ex);
        }
        if (ex instanceof IllegalArgumentException) {
            return new InvalidDataAccessApiUsageException(ex.getMessage(), ex);
        }

        // Check for well-known PersistenceException subclasses.
        if (ex instanceof EntityNotFoundException) {
            return new JpaObjectRetrievalFailureException((EntityNotFoundException) ex);
        }
        if (ex instanceof NoResultException) {
            return new EmptyResultDataAccessException(ex.getMessage(), 1, ex);
        }
        if (ex instanceof NonUniqueResultException) {
            return new IncorrectResultSizeDataAccessException(ex.getMessage(), 1, ex);
        }
        if (ex instanceof QueryTimeoutException) {
            return new org.springframework.dao.QueryTimeoutException(ex.getMessage(), ex);
        }
        if (ex instanceof LockTimeoutException) {
            return new CannotAcquireLockException(ex.getMessage(), ex);
        }
        if (ex instanceof PessimisticLockException) {
            return new PessimisticLockingFailureException(ex.getMessage(), ex);
        }
        if (ex instanceof OptimisticLockException) {
            return new JpaOptimisticLockingFailureException((OptimisticLockException) ex);
        }
        if (ex instanceof EntityExistsException) {
            return new DataIntegrityViolationException(ex.getMessage(), ex);
        }
                //抛出异常的点位
        if (ex instanceof TransactionRequiredException) {
            return new InvalidDataAccessApiUsageException(ex.getMessage(), ex);
        }

        // If we have another kind of PersistenceException, throw it.
        if (ex instanceof PersistenceException) {
            return new JpaSystemException(ex);
        }

        // If we get here, we have an exception that resulted from user code,
        // rather than the persistence provider, so we return null to indicate
        // that translation should not occur.
        return null;
    }

ERROR org.springframework.aop.interceptor.SimpleAsyncUncaughtExceptionHandler - Unexpected error occurred invoking async method 'public void (此处省略具体业事件监听类)Listener.onApplicationEvent(CompleteEvent)'.
org.springframework.dao.InvalidDataAccessApiUsageException: no transaction is in progress; nested exception is javax.persistence.TransactionRequiredException: no transaction is in progress
    at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExceptionIfPossible(EntityManagerFactoryUtils.java:413) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:246) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:488) ~[spring-orm-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:147) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodIntercceptor.invoke(CrudMethodMetadataPostProcessor.java:122) ~[spring-data-jpa-1.8.0.RELEASE.jar:na]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) ~[spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at com.sun.proxy.$Proxy55.saveAndFlush(Unknown Source) ~[na:na]
    //省略业务类信息
    at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204) [spring-core-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:738) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:282) [spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) [spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:673) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    atl$$EnhancerBySpringCGLIB$$a432af48.complete(<generated>) ~
--
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) [spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) [spring-aop-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.3.9.RELEASE.jar:4.3.9.RELEASE]
    ... 85 common frames omitted