How to solve lazy initialization exception using JPA and Hibernate as provider

Posted by rupertin on Stack Overflow See other posts from Stack Overflow or by rupertin
Published on 2009-02-23T17:04:56Z Indexed on 2010/03/22 16:41 UTC
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Filed under:

hibernate

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jpa

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lazy

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initialization

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error

I am working on a project for a customer who wants to use lazy initialization. They always get "lazy initialization exception" when mapping classes with the default lazy loading mode.

@JoinTable(name = "join_profilo_funzionalita", joinColumns = {@JoinColumn(name =    "profilo_id", referencedColumnName = "profilo_id")}, inverseJoinColumns = {@JoinColumn(name = "funzionalita_id", referencedColumnName = "funzionalita_id")})
//@ManyToMany(fetch=FetchType.EAGER) - no exceptions if uncommented
@ManyToMany 
private Collection<Funzionalita> funzionalitaIdCollection;

Is there a standard pattern using JPA classes to avoid this error?

Snippets are welcome, thanks a lot for your time.

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