[jboss-jira] [JBoss JIRA] Commented: (JBAS-5474) @PostLoad -> LazyInitializationException: illegal access to loading collection ond a @OneToMany with FetchType.EAGER

[arjan tijms (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBAS-5474?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12526120#action_12526120 ] 

arjan tijms commented on JBAS-5474:
-----------------------------------

Same issue and apparently still no resolution.

When accessing the association in the setter method, the following exception is thrown:

12:14:11,327 ERROR [LazyInitializationException] failed to lazily initialize a collection, no session or session was closed
org.hibernate.LazyInitializationException: failed to lazily initialize a collection, no session or session was closed
	at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:380)
	at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:372)
	at org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:119)
	at org.hibernate.collection.PersistentSet.size(PersistentSet.java:162)
	at java.util.LinkedHashSet.<init>(LinkedHashSet.java:151)

While accessing the association in the @PostLoad annotated method throws a different exception:
org.hibernate.LazyInitializationException: illegal access to loading collection
	at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:363)
	at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:108)
	at org.hibernate.collection.PersistentSet.iterator(PersistentSet.java:186)

In the last case, Hibernate explicitly checks whether the collection is still 'initializing', thus it's not related to any persistence context being closed. I'm not sure why the first exception does say that. Is that a bug in the exception that is thrown due to this bug?

The code that throws the exception when accessing the association in the @PostLoad method is the following:

/**
	 * Initialize the collection, if possible, wrapping any exceptions
	 * in a runtime exception
	 * @param writing currently obsolete
	 * @throws LazyInitializationException if we cannot initialize
	 */
	protected final void initialize(boolean writing) {
		if (!initialized) {
			if (initializing) {
				throw new LazyInitializationException("illegal access to loading collection");
			}
			throwLazyInitializationExceptionIfNotConnected();
			session.initializeCollection(this, writing);
		}
	}

> @PostLoad -> LazyInitializationException: illegal access to loading collection ond a @OneToMany with FetchType.EAGER
> --------------------------------------------------------------------------------------------------------------------
>
>                 Key: JBAS-5474
>                 URL: https://jira.jboss.org/jira/browse/JBAS-5474
>             Project: JBoss Application Server
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: EJB3
>    Affects Versions: JBossAS-4.2.2.GA
>         Environment: Win XP SP2, Java 1.5.0_15-b04
>            Reporter: Stefan Lindner
>            Assignee: Emmanuel Bernard
>         Attachments: Child.java, Parent.java, PostLoadTest.java
>
>
> I have a bean with a @OneToMany relation mapping like
> 	private List<TherapieeinheitBean> therapieeinheiten;
>      	@OneToMany(
> 			cascade = {CascadeType.REFRESH},
> 			fetch = FetchType.EAGER,
> 			mappedBy="therapiekatalog"
> 	)
> with FetchType.EAGER and a simnple @PostLoad like
>      	@PostLoad
> 	public void postLoad() {
> 		System.out.println("!!!!!!!!!! postLoad !!!!!!!!!!");
> 		System.out.print("size: " + therapieeinheiten.size());
> 	}
> When an entity of this bean is loaded JBoss trows 
>      org.hibernate.LazyInitializationException: illegal access to loading collection
>         at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:341)
>         at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
>         at org.hibernate.collection.PersistentBag.iterator(PersistentBag.java:249)
>         at de.visiodesk.therapiekatalog.TherapiekatalogBean.postLoad(TherapiekatalogBean.java:170)
>         .
>         .
>         .
> and prints the messages
>      WARN  [LoadContexts] fail-safe cleanup (collections) : org.hibernate.engine.loading.CollectionLoadContext at 2c8ce9<rs=Ingres-ResultSet[18523]>
>      WARN  [CollectionLoadContext] On CollectionLoadContext#cleanup, localLoadingCollectionKeys contained [206] entries
> afterwards. The PostLoad method should be called after the data was completely loaded. Is there a workaround for this Problem? I found some other ressources on the net where peole had the same problem, but I saw no resolution, no hint, no workaround.
>      

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