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Org.hibernate.lazyinitialization exception

org.hibernate.LazyInitializationException: Failed to lazily initialize the role collection: pojo.Person.address, session or session is not closed.

I get this exception and I am using Spring 3.0 and Hibernate 3.6.

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Looks like you have an Entity called Person, which has a lazily loaded mapped collection of Addresses? You have loaded the Person, and the session into which he was loaded is now closed.

After closing the session, you tried to access this collection of addresses, and Hibernate tried to download them. However, this is not possible if the original session is no longer available.

To access the address property, you have several options:

  • OpenSessionInView, , Hibernate / ( Spring MVC, , -). Hibernate HTTP-.

  • , ( ). ,

    Hibernate.initialize(Person.Address)

HQL, . - :

createQuery("from Person as person left join fetch person.address")

, .

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, . Spring , HibernateTemplate, HibernateTemplate.

:

  • ,
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  • API fetch join, .
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, @Transactional. , Hibernate , ( ), .

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