[seam-issues] [JBoss JIRA] (SEAMPERSIST-67) LazyInitializationException threw when persist a Many to Many collection of an entity.

hantsy bai (Commented) (JIRA) jira-events at lists.jboss.org
Tue Nov 8 07:30:45 EST 2011

    [ https://issues.jboss.org/browse/SEAMPERSIST-67?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12641040#comment-12641040 ] 

hantsy bai commented on SEAMPERSIST-67:

I created a project on github.com to reproduce this issue.


Deploy to jboss 7 and open http://localhost:8080/seam3-sandbox-1.0.0-SNAPSHOT/posts.xhtml in ur browser.

There are four buttons to save post.

create --> no @Transactional, no "em.flush" in method.
create 2--> has @Transactional, no "em.flush" in method.
create 3--> no @Transactional, has "em.flush" in method.
create 4--> has @Transactional, has "em.flush" in method.

When new a post, the first two can not save post, and I can not save the manytomany relations(Post and Tag).

When edit the post...the exception will be thrown.

> LazyInitializationException threw when persist a Many to Many collection of an entity.
> --------------------------------------------------------------------------------------
>                 Key: SEAMPERSIST-67
>                 URL: https://issues.jboss.org/browse/SEAMPERSIST-67
>             Project: Seam Persistence
>          Issue Type: Bug
>         Environment: Java 6 update 27, Seam 3.1.0Beta2, JBoss 7.0.1.Final
>            Reporter: hantsy bai
>            Priority: Critical
> I tried a saved a many to many relation(multicheckbox), but failed.
> But in before seam 2 application, I used like this, never encounter such a problem.
> I used Seam managed Persistence, and added TransactionIntercepter in the beans.xml.
> Please refer the discussion in the forum.

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