使用 Spring 引导和数据 JPA，尽管有 OpenSesionInViewFilter，但仍出现 LazyInitializationException
Using Spring Boot and Data JPA, getting LazyInitializationException despite the OpenSesionInViewFilter
我在 spring 引导下使用 Tapestry 5，使用这个很棒的小库：https://github.com/code8/tapestry-boot
然而，尽管我使用了 OpenSesionInViewFilter，但我还是遇到了臭名昭著的 LazyInitializationException。抛开 OpenSesionInViewFilter 的优点和缺点不谈，我希望在移植大型遗留应用程序时使用 OpenSesionInViewFilter。
我的 spring 引导配置是
@SpringBootApplication
public class Launcher {
public static void main(String[] args) {
new SpringApplicationBuilder(Launcher.class)
.web(true)
.run(args);
}
@Bean
public HibernateJpaSessionFactoryBean sessionFactory() {
return new HibernateJpaSessionFactoryBean();
}
@Bean
public FilterRegistrationBean registerOpenSessionInViewFilterBean() {
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
OpenSessionInViewFilter filter = new OpenSessionInViewFilter();
registrationBean.setFilter(filter);
registrationBean.setOrder(5);
return registrationBean;
}
}
我已确保 OpenSessionInViewFilter 在 TapestryFilter 之前加载，并通过 spring 的启动输出验证了这一点。我将 Tapestry-boot 库编辑为 TapestryFilter 上的 setOrder(10)。
我还通过调试验证了 OpenSessionInViewFilter 实际上正在创建一个会话。
在下面的 LIE 示例堆栈跟踪中，您可以看到正在使用 OpenSessionInViewFilter。
我有 2 个级别的服务层：
Tapestry Pages --> XXManagerImpl (e.g, UserManager) --> JpaRepository
我的管理器服务是这样注释的：
@Service
@Transactional(propagation = Propagation.REQUIRED)
public class UserManagerImpl implements UserManager, Serializable
我的 JpaRepositories 未使用 @Transactional 或 @Repository 进行注释（以防万一）。
初始数据访问按预期工作，但是当我尝试访问延迟初始化字段时，我得到了谎言。
根异常：
Caused by: org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:147) ~[hibernate-core-5.1.0.Final.jar:5.1.0.Final]
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:260) ~[hibernate-core-5.1.0.Final.jar:5.1.0.Final]
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:68) ~[hibernate-core-5.1.0.Final.jar:5.1.0.Final]
at org.mypackage.model.submodel.othermodel$$_jvstde5_1.getName(OtherModel$$_jvstde5_1.java) ~[main/:na]
at $InternalPropertyConduit_97875b5f2687.get(Unknown Source) ~[na:na]
at org.apache.tapestry5.internal.bindings.PropBinding.get(PropBinding.java:63) ~[tapestry-core-5.4.1.jar:na]
堆栈跟踪示例：
org.apache.tapestry5.ioc.internal.OperationException: Render queue error in Expansion[PropBinding[expansion mypage/Edit(model.othermodel.name)]]: could not initialize proxy - no Session
at org.apache.tapestry5.ioc.internal.OperationTrackerImpl.logAndRethrow(OperationTrackerImpl.java:186) ~[tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.ioc.internal.OperationTrackerImpl.run(OperationTrackerImpl.java:62) ~[tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.ioc.internal.PerThreadOperationTracker.run(PerThreadOperationTracker.java:60) ~[tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.ioc.internal.RegistryImpl.run(RegistryImpl.java:1254) ~[tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.internal.services.RequestOperationTracker.handlePageRender(RequestOperationTracker.java:66) ~[tapestry-core-5.4.1.jar:na]
at $ComponentRequestHandler_94ac265764f4.handlePageRendewn Source) ~[na:na]
at $ComponentRequestHandler_94ac2657642d.handlePageRender(Unknown Source) ~[na:na]
at org.apache.tapestry5.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.java:55) ~[tapestry-core-5.4.1.jar:na]
at $Dispatcher_94ac265764c8.dispatch(Unknown Source) ~[na:na]
at $Dispatcher_94ac26576473.dispatch(Unknown Source) ~[na:na]
at org.apache.tapestry5.modules.TapestryModule$RequestHandlerTerminator.service(TapestryModule.java:305) ~[tapestry-core-5.4.1.jar:na]
at org.apache.tapestry5.internal.services.RequestErrorFilter.service(RequestErrorFilter.java:26) ~[tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at org.apache.tapestry5.modules.TapestryModule.service(TapestryModule.java:846) [tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at org.apache.tapestry5.modules.TapestryModule.service(TapestryModule.java:836) [tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at org.apache.tapestry5.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:89) [tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter.invoke(CheckForUpdatesFilter.java:105) [tapestry-core-5.4.1.jar:na]
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter.invoke(CheckForUpdatesFilter.java:95) [tapestry-core-5.4.1.jar:na]
at org.apache.tapestry5.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:83) [tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:119) [tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at $RequestHandler_94ac2657649d.service(Unknown Source) [na:na]
at org.apache.tapestry5.modules.TapestryModule$HttpServletRequestHandlerTerminator.service(TapestryModule.java:256) [tapestry-core-5.4.1.jar:na]
apache.tapestry5.upload.internal.services.MultipartServletRequestFilter.service(MultipartServletRequestFilter.java:45) [tapestry-upload-5.4.1.jar:na]
at $HttpServletRequestHandler_94ac265764c4.service(Unknown Source) [na:na]
at org.apache.tapestry5.internal.gzip.GZipFilter.service(GZipFilter.java:59) [tapestry-core-5.4.1.jar:na]
at $HttpServletRequestHandler_94ac265764c4.service(Unknown Source) [na:na]
at org.apache.tapestry5.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62) [tapestry-core-5.4.1.jar:na]
at $HttpServletRequestFilter_94ac2657645a.service(Unknown Source) [na:na]
at $HttpServletRequestHandler_94ac265764c4.service(Unknown Source) [na:na]
at org.apache.tapestry5.modules.TapestryModule.service(TapestryModule.java:796) [tapestry-core-5.4.1.jar:na]
at $HttpServletRequestHandler_94ac265764c4.service(Unknown Source) [na:na]
at $HttpServletRequestHandler_94ac26576458.service(Unknown Source) [na:na]
at info.code8.tapestry.TapestryFilter.doFilter(TapestryFilter.java:49) [tapestry-boot-0.1.0-SNAPSHOT.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.32.jar:8.0.32]
at org.springframework.orm.hibernate5.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:151) [spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
库版本：
tapestry : 5.4.1
hibernate : hibernate-core-5.1.0.Final
spring framework : 4.2.5.RELEASE
spring-boot : 1.3.3.RELEASE
spring-data-jpa : 1.10.1.RELEASE // for querydsl 4 support
spring-data-commons: 1.12.1.RELEASE // for querydsl 4 support
OpenSessionInViewFilter 用于普通 Hibernate API。而 OpenEntityManagerInViewFilter 与 JPA api 一起使用（也适用于其他 JPA 提供程序）。
要解决您的问题，请使用适合您使用的技术的过滤器，在您的情况下为 OpenEntityManagerInViewFilter。
我在 spring 引导下使用 Tapestry 5，使用这个很棒的小库：https://github.com/code8/tapestry-boot
然而，尽管我使用了 OpenSesionInViewFilter，但我还是遇到了臭名昭著的 LazyInitializationException。抛开 OpenSesionInViewFilter 的优点和缺点不谈，我希望在移植大型遗留应用程序时使用 OpenSesionInViewFilter。
我的 spring 引导配置是
@SpringBootApplication
public class Launcher {
public static void main(String[] args) {
new SpringApplicationBuilder(Launcher.class)
.web(true)
.run(args);
}
@Bean
public HibernateJpaSessionFactoryBean sessionFactory() {
return new HibernateJpaSessionFactoryBean();
}
@Bean
public FilterRegistrationBean registerOpenSessionInViewFilterBean() {
FilterRegistrationBean registrationBean = new FilterRegistrationBean();
OpenSessionInViewFilter filter = new OpenSessionInViewFilter();
registrationBean.setFilter(filter);
registrationBean.setOrder(5);
return registrationBean;
}
}
我已确保 OpenSessionInViewFilter 在 TapestryFilter 之前加载，并通过 spring 的启动输出验证了这一点。我将 Tapestry-boot 库编辑为 TapestryFilter 上的 setOrder(10)。
我还通过调试验证了 OpenSessionInViewFilter 实际上正在创建一个会话。
在下面的 LIE 示例堆栈跟踪中，您可以看到正在使用 OpenSessionInViewFilter。
我有 2 个级别的服务层：
Tapestry Pages --> XXManagerImpl (e.g, UserManager) --> JpaRepository
我的管理器服务是这样注释的：
@Service
@Transactional(propagation = Propagation.REQUIRED)
public class UserManagerImpl implements UserManager, Serializable
我的 JpaRepositories 未使用 @Transactional 或 @Repository 进行注释（以防万一）。
初始数据访问按预期工作，但是当我尝试访问延迟初始化字段时，我得到了谎言。
根异常：
Caused by: org.hibernate.LazyInitializationException: could not initialize proxy - no Session
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:147) ~[hibernate-core-5.1.0.Final.jar:5.1.0.Final]
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:260) ~[hibernate-core-5.1.0.Final.jar:5.1.0.Final]
at org.hibernate.proxy.pojo.javassist.JavassistLazyInitializer.invoke(JavassistLazyInitializer.java:68) ~[hibernate-core-5.1.0.Final.jar:5.1.0.Final]
at org.mypackage.model.submodel.othermodel$$_jvstde5_1.getName(OtherModel$$_jvstde5_1.java) ~[main/:na]
at $InternalPropertyConduit_97875b5f2687.get(Unknown Source) ~[na:na]
at org.apache.tapestry5.internal.bindings.PropBinding.get(PropBinding.java:63) ~[tapestry-core-5.4.1.jar:na]
堆栈跟踪示例：
org.apache.tapestry5.ioc.internal.OperationException: Render queue error in Expansion[PropBinding[expansion mypage/Edit(model.othermodel.name)]]: could not initialize proxy - no Session
at org.apache.tapestry5.ioc.internal.OperationTrackerImpl.logAndRethrow(OperationTrackerImpl.java:186) ~[tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.ioc.internal.OperationTrackerImpl.run(OperationTrackerImpl.java:62) ~[tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.ioc.internal.PerThreadOperationTracker.run(PerThreadOperationTracker.java:60) ~[tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.ioc.internal.RegistryImpl.run(RegistryImpl.java:1254) ~[tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.internal.services.RequestOperationTracker.handlePageRender(RequestOperationTracker.java:66) ~[tapestry-core-5.4.1.jar:na]
at $ComponentRequestHandler_94ac265764f4.handlePageRendewn Source) ~[na:na]
at $ComponentRequestHandler_94ac2657642d.handlePageRender(Unknown Source) ~[na:na]
at org.apache.tapestry5.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.java:55) ~[tapestry-core-5.4.1.jar:na]
at $Dispatcher_94ac265764c8.dispatch(Unknown Source) ~[na:na]
at $Dispatcher_94ac26576473.dispatch(Unknown Source) ~[na:na]
at org.apache.tapestry5.modules.TapestryModule$RequestHandlerTerminator.service(TapestryModule.java:305) ~[tapestry-core-5.4.1.jar:na]
at org.apache.tapestry5.internal.services.RequestErrorFilter.service(RequestErrorFilter.java:26) ~[tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at org.apache.tapestry5.modules.TapestryModule.service(TapestryModule.java:846) [tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at org.apache.tapestry5.modules.TapestryModule.service(TapestryModule.java:836) [tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at org.apache.tapestry5.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:89) [tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter.invoke(CheckForUpdatesFilter.java:105) [tapestry-core-5.4.1.jar:na]
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter.invoke(CheckForUpdatesFilter.java:95) [tapestry-core-5.4.1.jar:na]
at org.apache.tapestry5.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:83) [tapestry-ioc-5.4.1.jar:na]
at org.apache.tapestry5.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:119) [tapestry-core-5.4.1.jar:na]
at $RequestHandler_94ac265764c7.service(Unknown Source) [na:na]
at $RequestHandler_94ac2657649d.service(Unknown Source) [na:na]
at org.apache.tapestry5.modules.TapestryModule$HttpServletRequestHandlerTerminator.service(TapestryModule.java:256) [tapestry-core-5.4.1.jar:na]
apache.tapestry5.upload.internal.services.MultipartServletRequestFilter.service(MultipartServletRequestFilter.java:45) [tapestry-upload-5.4.1.jar:na]
at $HttpServletRequestHandler_94ac265764c4.service(Unknown Source) [na:na]
at org.apache.tapestry5.internal.gzip.GZipFilter.service(GZipFilter.java:59) [tapestry-core-5.4.1.jar:na]
at $HttpServletRequestHandler_94ac265764c4.service(Unknown Source) [na:na]
at org.apache.tapestry5.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62) [tapestry-core-5.4.1.jar:na]
at $HttpServletRequestFilter_94ac2657645a.service(Unknown Source) [na:na]
at $HttpServletRequestHandler_94ac265764c4.service(Unknown Source) [na:na]
at org.apache.tapestry5.modules.TapestryModule.service(TapestryModule.java:796) [tapestry-core-5.4.1.jar:na]
at $HttpServletRequestHandler_94ac265764c4.service(Unknown Source) [na:na]
at $HttpServletRequestHandler_94ac26576458.service(Unknown Source) [na:na]
at info.code8.tapestry.TapestryFilter.doFilter(TapestryFilter.java:49) [tapestry-boot-0.1.0-SNAPSHOT.jar:na]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.32.jar:8.0.32]
at org.springframework.orm.hibernate5.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:151) [spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.2.5.RELEASE.jar:4.2.5.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.32.jar:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
库版本：
tapestry : 5.4.1
hibernate : hibernate-core-5.1.0.Final
spring framework : 4.2.5.RELEASE
spring-boot : 1.3.3.RELEASE
spring-data-jpa : 1.10.1.RELEASE // for querydsl 4 support
spring-data-commons: 1.12.1.RELEASE // for querydsl 4 support
OpenSessionInViewFilter 用于普通 Hibernate API。而 OpenEntityManagerInViewFilter 与 JPA api 一起使用（也适用于其他 JPA 提供程序）。
要解决您的问题，请使用适合您使用的技术的过滤器，在您的情况下为 OpenEntityManagerInViewFilter。