java - org.hibernate.LazyInitializationException : failed to lazily initialize a collection of role in another environment

Question

美好的一天，

知道这个标题都是关于堆栈溢出的，并且也有多种解决方案。

但是这种情况有点不同，我不知道应该在哪里继续排除故障。

在我的 BaseUser.java 实体类中，我有以下代码:

@SuppressWarnings("serial")
@MappedSuperclass
public abstract class BaseUser< T extends BasePasswordHistory > extends
        AuditModel implements IDeletable, IEditable, UserProfile {

// some other code here...
        @OneToMany(cascade = { CascadeType.ALL }, mappedBy = "user")
        @OrderBy("passwordHistoryId desc")
        public Set< T > getPasswordHistories() {
            return passwordHistories;
        }
// some other code here...

}

以下是我在 ManagerImpl 级别调用密码历史记录的代码的一部分，BaseUserManagerImpl.java。

 Set< T > histories = user.getPasswordHistories( );
 for ( T history : histories ) { // exception at this line in another environment
 }

BaseUserManagerImpl.java 仍然处于同一个 hibernate 事务下，因此，它能够加载 passwordHistory 对象，甚至是它的 lazy fetch 类型。 (如有错误请指正)

这些代码在原始环境(让其命名为 env A)中运行良好，直到我将相同的代码部署到另一个环境(让其命名为 env B)，并且它将像标题一样遇到 LazyInitializationException 。

我检查了WAS版本，发现版本有些不同。

实际上我不认为这些是引发异常的原因。但我真的不知道为什么相同的代码不能在不同的环境中工作。我还需要进一步检查吗？

在这里我发布我的堆栈跟踪:

2019-06-25 17:17:47.967 [WebContainer : 3] ERROR c.c.i.c.c.u.e.ExceptionHandler - [cvmaker123] - Exception occurred
org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.cv.ibs.cib.support.entity.BankUser.passwordHistories, no session or session was closed
    at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380) ~[hibernate-core-3.3.1.GA.jar:3.3.1.GA]
    at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372) ~[hibernate-core-3.3.1.GA.jar:3.3.1.GA]
    at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:365) ~[hibernate-core-3.3.1.GA.jar:3.3.1.GA]
    at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108) ~[hibernate-core-3.3.1.GA.jar:3.3.1.GA]
    at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:186) ~[hibernate-core-3.3.1.GA.jar:3.3.1.GA]
    at com.cv.ibs.cib.common.service.impl.BaseUserManagerImpl.verifyPasswordHistory(BaseUserManagerImpl.java:241) ~[com.cv.ibs.cib.jar:na]
    at com.cv.ibs.cib.support.service.impl.BankUserManagerImpl.updatePassword(BankUserManagerImpl.java:288) ~[com.cv.ibs.cib.jar:na]
    at com.cv.ibs.cib.support.service.impl.BankUserManagerImpl.updatePassword(BankUserManagerImpl.java:1) ~[com.cv.ibs.cib.jar:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:95) ~[na:1.7.0]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:56) ~[na:1.7.0]
    at java.lang.reflect.Method.invoke(Method.java:620) ~[na:2.6 (10-05-2016)]
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:309) ~[org.springframework.aop-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183) ~[org.springframework.aop-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150) ~[org.springframework.aop-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89) ~[org.springframework.aop-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172) ~[org.springframework.aop-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:202) ~[org.springframework.aop-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at com.sun.proxy.$Proxy464.updatePassword(Unknown Source) ~[na:na]
    at c.c.i.c.app.profile.command.ChangePasswordCommandHandler.execute(ChangePasswordCommandHandler.java:42) ~[com.cv.ibs.cib.jar:na]

以下是代码的一部分:

public class ChangePasswordCommandHandler implements
        CommandHandler< ChangePasswordCommand, Integer > {

    @Autowired
    private UserManager userManager;

    public Integer execute(ChangePasswordCommand command)
            throws BaseException {

        return userManager.updatePassword( user, command.getNewPassword( ),
                command.isResetPWD( ) );
    }
}

@Service
public class UserManagerImpl extends
        BaseUserManagerImpl< User, PasswordHistory > implements
        UserManager {
    public int updatePassword(User user, String newPassword,
            boolean isResetPWD) throws BaseException {
         User entity = findById( user.getUserId( ) );
         final String newHash = getNewPasswordHash( entity, newPassword );
         entity = verifyPasswordHistory( entity, entity.getPassword( ),
                    newHash, isResetPWD );
         return 1;
     }
}

public abstract class BaseUserManagerImpl< T extends BaseUser< U >, U extends BasePasswordHistory >
        extends BaseManagerImpl< T, Long > implements BaseUserManager< T, U >,
        UserProfileService {
    final protected T verifyPasswordHistory(final T user, String oldHash,
            String newHash, boolean isResetPWD) {
        final int reuseNo = getMaxPassowrdhistory( );
        Set< U > histories = user.getPasswordHistories( );
        for ( U history : histories ) { // exception at this line in another environment
        }
    }
}

请多多指教。

Answer 1

您的方法应该是事务性的，至少是只读的。 您是否在顶级旅行类或方法上使用@Transactional注释。