java Spring JPA：没有正在进行的事务

Spring JPA: no transaction is in progress

提问by user3170702

I'm having problems persisting entities in my Spring application. Just doing em.merge()finishes without errors but does not update the database, and trying em.flush()causes this exception:

我在 Spring 应用程序中持久化实体时遇到问题。只是em.merge()完成没有错误但不更新数据库，并尝试em.flush()导致此异常：

2015-12-19 18:01:40 DEBUG DispatcherServlet:976 - Could not complete request org.springframework.dao.InvalidDataAccessApiUsageException: no transaction is in progress; nested exception is javax.persistence.TransactionRequiredException: no transaction is in progress

2015-12-19 18:01:40 DEBUG DispatcherServlet:976 - 无法完成请求 org.springframework.dao.InvalidDataAccessApiUsageException：没有正在进行的交易；嵌套异常是 javax.persistence.TransactionRequiredException: no transaction is in progress

This is my configuration:

这是我的配置：

@Configuration
@EnableWebMvc
@ComponentScan
@Import({ SecurityConfig.class })
@PropertySource("classpath:application.properties")
@EnableJpaRepositories
@EnableTransactionManagement
public class ApplicationContext extends WebMvcConfigurerAdapter {

    @Bean
    public DataSource dataSource() {
        DriverManagerDataSource datasource = new DriverManagerDataSource();
        datasource.setDriverClassName("org.postgresql.Driver");
        datasource.setUrl("jdbc:postgresql://localhost/expert");
        datasource.setUsername("expert");
        datasource.setPassword("expert");
        return datasource;
    }

    @Bean
    public JdbcTemplate jdbcTemplate() {
        return new JdbcTemplate(dataSource());
    }

    @Bean
    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
        LocalContainerEntityManagerFactoryBean factoryBean
                = new LocalContainerEntityManagerFactoryBean();
        factoryBean.setDataSource(dataSource());
        factoryBean.setPackagesToScan(new String[ ] { "test.model" });
        JpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
        factoryBean.setJpaVendorAdapter(vendorAdapter);
        factoryBean.setJpaProperties(this.additionalProperties());
        return factoryBean;
    }

    @Bean
    public PlatformTransactionManager transactionManager() {
        JpaTransactionManager transactionManager = new JpaTransactionManager();
        transactionManager.setEntityManagerFactory(entityManagerFactory().getObject());
        return transactionManager;
    }

    @Bean
    public PersistenceExceptionTranslationPostProcessor exceptionTranslation() {
        return new PersistenceExceptionTranslationPostProcessor();
    }

    Properties additionalProperties() {
        Properties properties = new Properties();
        properties.setProperty("hibernate.show_sql", "true");
        properties.setProperty("hibernate.format_sql", "false");
        properties.setProperty("hibernate.hbm2ddl.auto", "update");
        properties.setProperty("hibernate.dialect", "org.hibernate.dialect.PostgreSQLDialect");
        return properties;
    }

}

My service:

我的服务：

@Service
@Transactional
public class ApiProjectServiceImpl implements ApiProjectService {

    @Autowired
    private ApiProjectRepository apiProjectRepository;

    public Project getProject(Integer id) {
        return apiProjectRepository.getProject(id);
    }

    public Project save(Project project) { return apiProjectRepository.save(project); }

}

And the repository:

和存储库：

@Repository
public class ApiProjectRepositoryImpl implements ApiProjectRepository {

    @PersistenceContext
    private EntityManager em;

    public Project getProject(Integer id) {
        Project project = em.createQuery("select p from Project p where id = " + id, Project.class)
                .getSingleResult();
        return project;
    }

    public Project save(Project project) {
        project = em.merge(project);
        em.flush();
        return project;
    }

}

Stacktrace when trying save():

尝试时的堆栈跟踪save()：

2015-12-19 18:15:05 DEBUG FilterSecurityInterceptor:215 - Authorization successful
2015-12-19 18:15:05 DEBUG FilterSecurityInterceptor:227 - RunAsManager did not change Authentication object
2015-12-19 18:15:05 DEBUG FilterChainProxy:323 - /api/project reached end of additional filter chain; proceeding with original chain
2015-12-19 18:15:05 DEBUG OpenEntityManagerInViewFilter:160 - Opening JPA EntityManager in OpenEntityManagerInViewFilter
2015-12-19 18:15:05 DEBUG DispatcherServlet:823 - DispatcherServlet with name 'dispatcher' processing POST request for [/api/project]
2015-12-19 18:15:05 DEBUG RequestMappingHandlerMapping:229 - Looking up handler method for path /api/project
2015-12-19 18:15:05 DEBUG RequestMappingHandlerMapping:234 - Returning handler method [public test.model.Project test.api.ApiController.saveProject(test.model.Project)]
2015-12-19 18:15:05 DEBUG DefaultListableBeanFactory:246 - Returning cached instance of singleton bean 'apiController'
2015-12-19 18:15:05 DEBUG RequestResponseBodyMethodProcessor:140 - Reading [class test.model.Project] as "application/json;charset=UTF-8" using [org.springframework.http.converter.json.MappingHymansonHttpMessageConverter@71528048]
2015-12-19 18:15:05 DEBUG Loader:2136 - Loading entity: [test.model.Project#16623]
2015-12-19 18:15:05 DEBUG SQL:109 - select project0_.id as id1_6_1_, project0_.awarded as awarded2_6_1_, project0_.broker as broker3_6_1_, project0_.brokerEmail as brokerEm4_6_1_, project0_.brokerPhone as [...]
2015-12-19 18:15:05 DEBUG LogicalConnectionImpl:226 - Obtaining JDBC connection
2015-12-19 18:15:05 DEBUG DriverManagerDataSource:162 - Creating new JDBC DriverManager Connection to [jdbc:postgresql://localhost/expert]
2015-12-19 18:15:05 DEBUG LogicalConnectionImpl:232 - Obtained JDBC connection
2015-12-19 18:15:05 DEBUG Loader:951 - Result set row: 0
2015-12-19 18:15:05 DEBUG Loader:1485 - Result row: null, EntityKey[test.model.Project#16623]
2015-12-19 18:15:05 DEBUG Loader:1336 - Result set contains (possibly empty) collection: [test.model.Project.assignedExperts#16623]
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:160 - Resolving associations for [test.model.Project#16623]
2015-12-19 18:15:05 DEBUG Loader:2136 - Loading entity: [test.model.Company#3]
2015-12-19 18:15:05 DEBUG SQL:109 - select company0_.id as id1_1_0_, company0_.email as email2_1_0_, company0_.name as name3_1_0_ from Company company0_ where company0_.id=?
2015-12-19 18:15:05 DEBUG Loader:951 - Result set row: 0
2015-12-19 18:15:05 DEBUG Loader:1485 - Result row: EntityKey[test.model.Company#3]
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:160 - Resolving associations for [test.model.Company#3]
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:286 - Done materializing entity [test.model.Company#3]
2015-12-19 18:15:05 DEBUG Loader:2160 - Done entity load
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:286 - Done materializing entity [test.model.Project#16623]
2015-12-19 18:15:05 DEBUG CollectionLoadContext:232 - 1 collections were found in result set for role: test.model.Project.assignedExperts
2015-12-19 18:15:05 DEBUG CollectionLoadContext:280 - Collection fully initialized: [test.model.Project.assignedExperts#16623]
2015-12-19 18:15:05 DEBUG CollectionLoadContext:240 - 1 collections initialized for role: test.model.Project.assignedExperts
2015-12-19 18:15:05 DEBUG Loader:2160 - Done entity load
2015-12-19 18:15:05 DEBUG Loader:2136 - Loading entity: [test.model.Logging#35672]
2015-12-19 18:15:05 DEBUG SQL:109 - select logging0_.id as id1_4_0_, logging0_.date as date2_4_0_, logging0_.message as message3_4_0_, logging0_.project_id as project_5_4_0_, logging0_.username as username4_4_0_ from [...]
2015-12-19 18:15:05 DEBUG Loader:951 - Result set row: 0
2015-12-19 18:15:05 DEBUG Loader:1485 - Result row: EntityKey[test.model.Logging#35672]
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:160 - Resolving associations for [test.model.Logging#35672]
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:286 - Done materializing entity [test.model.Logging#35672]
2015-12-19 18:15:05 DEBUG Loader:2160 - Done entity load
2015-12-19 18:15:05 DEBUG Loader:2136 - Loading entity: [test.model.Logging#35673]
2015-12-19 18:15:05 DEBUG SQL:109 - select logging0_.id as id1_4_0_, logging0_.date as date2_4_0_, logging0_.message as message3_4_0_, logging0_.project_id as project_5_4_0_, logging0_.username as username4_4_0_ from [...]
2015-12-19 18:15:05 DEBUG Loader:951 - Result set row: 0
2015-12-19 18:15:05 DEBUG Loader:1485 - Result row: EntityKey[test.model.Logging#35673]
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:160 - Resolving associations for [test.model.Logging#35673]
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:286 - Done materializing entity [test.model.Logging#35673]
2015-12-19 18:15:05 DEBUG Loader:2160 - Done entity load
2015-12-19 18:15:05 DEBUG Loader:2136 - Loading entity: [test.model.Party#4903]
2015-12-19 18:15:05 DEBUG SQL:109 - select party0_.id as id1_5_0_, party0_.addressCity as addressC2_5_0_, party0_.addressStreet as addressS3_5_0_, party0_.addressZip as addressZ4_5_0_, party0_.email as email5_5_0_, party0_.expert as [...]
2015-12-19 18:15:05 DEBUG Loader:951 - Result set row: 0
2015-12-19 18:15:05 DEBUG Loader:1485 - Result row: EntityKey[test.model.Party#4903]
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:160 - Resolving associations for [test.model.Party#4903]
2015-12-19 18:15:05 DEBUG TwoPhaseLoad:286 - Done materializing entity [test.model.Party#4903]
2015-12-19 18:15:05 DEBUG Loader:2160 - Done entity load
2015-12-19 18:15:05 DEBUG ExceptionHandlerExceptionResolver:132 - Resolving exception from handler [public test.model.Project test.api.ApiController.saveProject(test.model.Project)]: org.springframework.dao.InvalidDataAccessApiUsageException: no transaction is in progress; nested exception is javax.persistence.TransactionRequiredException: no transaction is in progress
2015-12-19 18:15:05 DEBUG ResponseStatusExceptionResolver:132 - Resolving exception from handler [public test.model.Project test.api.ApiController.saveProject(test.model.Project)]: org.springframework.dao.InvalidDataAccessApiUsageException: no transaction is in progress; nested exception is javax.persistence.TransactionRequiredException: no transaction is in progress
2015-12-19 18:15:05 DEBUG DefaultHandlerExceptionResolver:132 - Resolving exception from handler [public test.model.Project test.api.ApiController.saveProject(test.model.Project)]: org.springframework.dao.InvalidDataAccessApiUsageException: no transaction is in progress; nested exception is javax.persistence.TransactionRequiredException: no transaction is in progress
2015-12-19 18:15:05 DEBUG DispatcherServlet:976 - Could not complete request
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)
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:157)
    at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:417)
    at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:58)
    at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:163)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
    at com.sun.proxy.$Proxy48.save(Unknown Source)
    at test.api.ApiProjectServiceImpl.save(ApiProjectServiceImpl.java:24)
    at test.api.ApiController.saveProject(ApiController.java:58)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:215)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:745)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:686)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:80)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:925)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:856)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:953)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:855)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:829)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:177)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:154)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:199)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:57)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:50)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1526)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1482)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)
Caused by: javax.persistence.TransactionRequiredException: no transaction is in progress
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.checkTransactionNeeded(AbstractEntityManagerImpl.java:1171)
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.flush(AbstractEntityManagerImpl.java:1332)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.orm.jpa.ExtendedEntityManagerCreator$ExtendedEntityManagerInvocationHandler.invoke(ExtendedEntityManagerCreator.java:342)
    at com.sun.proxy.$Proxy39.flush(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:262)
    at com.sun.proxy.$Proxy39.flush(Unknown Source)
    at test.api.ApiProjectRepositoryImpl.save(ApiProjectRepositoryImpl.java:35)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:155)
    ... 79 more
2015-12-19 18:15:05 DEBUG OpenEntityManagerInViewFilter:185 - Closing JPA EntityManager in OpenEntityManagerInViewFilter
2015-12-19 18:15:05 DEBUG EntityManagerFactoryUtils:435 - Closing JPA EntityManager
2015-12-19 18:15:05 DEBUG LogicalConnectionImpl:246 - Releasing JDBC connection
2015-12-19 18:15:05 DEBUG LogicalConnectionImpl:264 - Released JDBC connection
2015-12-19 18:15:05 DEBUG SecurityContextPersistenceFilter:97 - SecurityContextHolder now cleared, as request processing completed

Thanks!

谢谢！

Update 1Apparently the problem has been solved by upgrading from Spring 3.2.8 to Spring 4.2.0. I didn't make any changes to the code, I'm aware that a transaction is needed but the service implementation is annotated with @Transactional. Thanks all.

更新 1显然问题已通过从 Spring 3.2.8 升级到 Spring 4.2.0 解决。我没有对代码进行任何更改，我知道需要一个事务，但服务实现用@Transactional. 谢谢大家。

回答by oak

Just like @Neil Stockton mentioned, some EntityManagerfunctions require a Transaction to exist. see the doc

就像@Neil Stockton 提到的那样，某些EntityManager功能需要存在事务。 看文档

Here is the docabout flushfunction:

这是doc关于flush函数：

void flush() Synchronize the persistence context to the underlying database. Throws: TransactionRequiredException - if there is no transaction or if the entity manager has not been joined to the current transaction PersistenceException - if the flush fails

void flush() 将持久化上下文同步到底层数据库。抛出： TransactionRequiredException - 如果没有事务或者实体管理器没有加入当前事务 PersistenceException - 如果刷新失败

The same goes for Mergefunction as well:

这同样适用于Merge功能以及：

T merge(T entity) Merge the state of the given entity into the current persistence context. Parameters: entity - entity instance Returns: the managed instance that the state was merged to Throws: IllegalArgumentException - if instance is not an entity or is a removed entity TransactionRequiredException - if there is no transaction when invoked on a container-managed entity manager of that is of type PersistenceContextType.TRANSACTION

T merge(T entity) 将给定实体的状态合并到当前持久化上下文中。参数：entity - 实体实例返回：状态被合并到的托管实例抛出：IllegalArgumentException - 如果实例不是实体或者是删除的实体 TransactionRequiredException - 如果在容器管理的实体管理器上调用时没有事务是 PersistenceContextType.TRANSACTION 类型

So basically what you want is to create new transactionor to use an existsone. Since you are using @EnableTransactionManagementannotation you can just annotate your method in order to do so

所以基本上你想要的是创建new transaction或使用exists一个。由于您正在使用@EnableTransactionManagement注释，因此您只需注释您的方法即可

@Transactional(propagation=Propagation.REQUIRED)
public Project save(Project project) {
        project = em.merge(project);
        em.flush();
        return project;
    }

More about SpringTransactions can be found at the spring docs. More the transactionsin java can be found at ibmwhich is highly recommended.

有关Spring事务的更多信息可以在spring 文档中找到。更多transactionsin java 可以在 ibm上找到，强烈推荐。

回答by yormen

Add this to your datasource file/config

将此添加到您的数据源文件/配置

hibernate.allow_update_outside_transaction: true

hibernate.allow_update_outside_transaction: true

It should work, but be sure of your production environment though

它应该可以工作，但请确保您的生产环境