[hibernate-issues] [Hibernate-JIRA] Commented: (HHH-2299) dynamic-map entity mode mappings with relationships rise lazy initialization during performing query
Maxim Karavaev (JIRA)
noreply at atlassian.com
Mon Feb 5 07:09:40 EST 2007
[ http://opensource.atlassian.com/projects/hibernate/browse/HHH-2299?page=comments#action_25990 ]
Maxim Karavaev commented on HHH-2299:
-------------------------------------
I have the similar proplem... Let's say, we have a two entity A and B with bidirectional relation:
<class entity-name="A" table="TABLE_A">
<id column="ID" name="id" type="int"/>
<set name="Bs" table="TABLE_AB">
<key column="B_ID"/>
<many-to-many column="A_ID" entity-name="B"/>
</set>
</class>
<class entity-name="B" table="TABLE_B">
<id column="ID" name="id" type="int"/>
<set name="As" table="TABLE_AB" inverse="true">
<key column="A_ID"/>
<many-to-many column="B_ID" entity-name="A"/>
</set>
</class>
I use hibernate in EJB environment. Method of some session bean:
...
public void addLinkA2B( Integer a_id, Integer b_id )
throws FinderException, CreateException
{
final Session session = getSession();
final Session dSession = session.getSession( EntityMode.MAP );
try
{
final Map a_instance = ( Map )dSession.get( "A", a_id );
if( a_instance == null )
{
throw new FinderException( "Add link failed for due to '" + a_id + "' not found" );
}
final Map b_instance = ( Map )dSession.get( "B", b_id );
if( b_instance == null )
{
throw new FinderException( "Add link failed for due to '" + b_id + "' not found" );
}
final Collection links = ( Collection )a_instance.get( "Bs" );
links.add( b_instance );
dSession.flush();
}
catch( HibernateException e1 )
{
throw new CreateException( "Add link failed due to " + e1.toString() );
}
finally
{
session.close();
}
}
...
and now, testcase:
...
test.createA( 1 );
test.createA( 2 );
test.createB( 1 );
test.addLinkA2B( 1, 1 );
// next line throws a LazyInitializationException
test.addLinkA2B( 2, 1 );
test.createB( 2 );
test.addLinkA2B( 1, 2 );
test.addLinkA2B( 2, 2 );
...
(full source attached)
In the log file, at first invocation of addLinkA2B:
Hibernate: select a0_.ID as ID479_0_ from TABLE_A a0_ where a0_.ID=?
Hibernate: select b0_.ID as ID481_0_ from TABLE_B b0_ where b0_.ID=?
Hibernate: select bs0_.B_ID as B1_1_, bs0_.A_ID as A2_1_, b1_.ID as ID481_0_ from TABLE_AB bs0_ left outer join TABLE_B b1_ on bs0_.A_ID=b1_.ID where bs0_.B_ID=?
Hibernate: select as0_.A_ID as A2_1_, as0_.B_ID as B1_1_, a1_.ID as ID479_0_ from TABLE_AB as0_ left outer join TABLE_A a1_ on as0_.B_ID=a1_.ID where as0_.A_ID=?
Hibernate: insert into TABLE_AB (B_ID, A_ID) values (?, ?)
Nice. The next invocation (when set is not empty):
Hibernate: select a0_.ID as ID479_0_ from TABLE_A a0_ where a0_.ID=?
Hibernate: select b0_.ID as ID481_0_ from TABLE_B b0_ where b0_.ID=?
Hibernate: select bs0_.B_ID as B1_1_, bs0_.A_ID as A2_1_, b1_.ID as ID481_0_ from TABLE_AB bs0_ left outer join TABLE_B b1_ on bs0_.A_ID=b1_.ID where bs0_.B_ID=?
Hibernate: select as0_.A_ID as A2_1_, as0_.B_ID as B1_1_, a1_.ID as ID479_0_ from TABLE_AB as0_ left outer join TABLE_A a1_ on as0_.B_ID=a1_.ID where as0_.A_ID=?
Hibernate: select bs0_.B_ID as B1_1_, bs0_.A_ID as A2_1_, b1_.ID as ID481_0_ from TABLE_AB bs0_ left outer join TABLE_B b1_ on bs0_.A_ID=b1_.ID where bs0_.B_ID=?
ERROR [org.hibernate.LazyInitializationException] illegal access to loading collection
Recursion initializing of a LAZY collections! And all this problems only in PersistentSet.hashCode() method. I just use a "bag" instead of "set" to avoid this problem, but this solution adds a some new ones.
So again, Why not to use a naitive JDK version of hashCode as in PersistenBag?
> dynamic-map entity mode mappings with relationships rise lazy initialization during performing query
Created: Yesterday 05:51 AM Updated: Yesterday 06:07 AM
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HHH-2299
> URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-2299
> Project: Hibernate3
> Type: Bug
> Components: core
> Versions: 3.2.1
> Reporter: Boleslaw Dawidowicz
> Attachments: hibernate-issue.tar.gz
>
>
> (copied from http://jira.jboss.com/jira/browse/HIBERNATE-51)
> (attached IntelliJ project with test case that reproduce this issue)
> If I create bidirectional relationship between two dynamic-map entities, commit a transaction and start new session, performing a query to obtain an entity raise LazyInitializationException.
> (full intellij project attached)
> code and mappings:
> public void testSF() throws Exception
> {
> sf.openSession();
> Session es = sf.getCurrentSession();
> Transaction tx = es.beginTransaction();
> Map lolo = new HashMap();
> lolo.put("userName", "lolo");
> es.save("PortalUser", lolo);
> Map dummy = new HashMap();
> dummy.put("name", "dummy");
> es.save("PortalRole", dummy);
> Set roles = new HashSet();
> roles.add(dummy);
> lolo.put("roles",roles);
> Map props = new HashMap();
> props.put("theme", "pp");
> props.put("signature", "alalala");
> lolo.put("dynamic", props);
> es.save("PortalUser", lolo);
> tx.commit();
> sf.openSession();
> es = sf.getCurrentSession();
> tx = es.beginTransaction();
> Query query = es.createQuery("from PortalUser where userName=:userName");
> query.setParameter("userName", "lolo");
>
> //LazyInitializationException on this LINE!!!
> lolo = (Map)query.uniqueResult();
> assertNotNull(lolo.get("roles"));
> assertNotNull(lolo.get("dynamic"));
> tx.commit();
> }
> <hibernate-mapping>
> <class
> entity-name="PortalUser">
> <!--<cache usage="@portal.hibernate.cache.usage@"/>-->
> <id
> name="key"
> column="jbp_uid"
> type="java.lang.Long">
> <generator class="native">
> <param name="sequence">user_seq</param>
> </generator>
> </id>
> <property
> name="userName"
> column="jbp_uname"
> type="java.lang.String"
> update="false"
> insert="true"
> unique="true"/>
> <map
> name="dynamic"
> table="jbp_user_prop"
> lazy="false"
> sort="unsorted"
> cascade="all">
> <!--<cache usage="@portal.hibernate.cache.usage@"/>-->
> <key column="jbp_uid"/>
> <index
> column="jbp_name"
> type="java.lang.String"/>
> <element
> column="jbp_value"
> type="java.lang.String"
> not-null="false"
> unique="false"/>
> </map>
> <!-- at mappings@-->
> <property
> name="password"
> column="jbp_password"
> type="java.lang.String"
> update="true"
> insert="true"
> unique="false"/>
> <set
> name="roles"
> table="jbp_role_membership"
> lazy="false"
> inverse="false"
> cascade="none"
> sort="unsorted">
> <!--<cache usage="@portal.hibernate.cache.usage@"/>-->
> <key column="jbp_uid"/>
> <many-to-many
> entity-name="PortalRole"
> column="jbp_rid"
> outer-join="true"/>
> </set>
> </class>
> <class
> entity-name="PortalRole"
> table="jbp_roles">
> <!--<cache usage="@portal.hibernate.cache.usage@"/>-->
> <id
> name="key"
> column="jbp_rid"
> type="java.lang.Long">
> <generator class="native">
> <param name="sequence">user_seq</param>
> </generator>
> </id>
> <property
> name="name"
> column="jbp_name"
> type="java.lang.String"
> update="false"
> insert="true"
> unique="true"/>
> <property
> name="displayName"
> column="jbp_displayname"
> type="java.lang.String"
> update="true"
> insert="true"
> unique="true"/>
> <set
> name="users"
> table="jbp_role_membership"
> lazy="true"
> inverse="true"
> cascade="none"
> sort="unsorted">
> <!--<cache usage="@portal.hibernate.cache.usage@"/>-->
> <key column="jbp_rid"/>
> <many-to-many
> entity-name="PortalUser"
> column="jbp_uid"
> outer-join="false"/>
> </set>
> </class>
> </hibernate-mapping>
> Stack trace:
> 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.PersistentSet.hashCode(PersistentSet.java:411)
> at java.util.HashMap$Entry.hashCode(HashMap.java:764)
> at java.util.AbstractMap.hashCode(AbstractMap.java:557)
> at java.util.HashMap.put(HashMap.java:418)
> at java.util.HashSet.add(HashSet.java:194)
> at java.util.AbstractCollection.addAll(AbstractCollection.java:318)
> at org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:329)
> at org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:183)
> at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:268)
> at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:249)
> at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:866)
> at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:853)
> at org.hibernate.loader.Loader.doQuery(Loader.java:717)
> at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
> at org.hibernate.loader.Loader.loadCollection(Loader.java:1985)
> at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)
> at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:565)
> at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
> at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1716)
> at org.hibernate.collection.AbstractPersistentCollection.initialize(AbstractPersistentCollection.java:344)
> at org.hibernate.collection.AbstractPersistentCollection.read(AbstractPersistentCollection.java:86)
> at org.hibernate.collection.PersistentSet.hashCode(PersistentSet.java:411)
> at java.util.HashMap$Entry.hashCode(HashMap.java:764)
> at java.util.AbstractMap.hashCode(AbstractMap.java:557)
> at java.util.HashMap.put(HashMap.java:418)
> at java.util.HashSet.add(HashSet.java:194)
> at java.util.AbstractCollection.addAll(AbstractCollection.java:318)
> at org.hibernate.collection.PersistentSet.endRead(PersistentSet.java:329)
> at org.hibernate.engine.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:183)
> at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:268)
> at org.hibernate.engine.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:249)
> at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:866)
> at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:853)
> at org.hibernate.loader.Loader.doQuery(Loader.java:717)
> at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:224)
> at org.hibernate.loader.Loader.loadCollection(Loader.java:1985)
> at org.hibernate.loader.collection.CollectionLoader.initialize(CollectionLoader.java:36)
> at org.hibernate.persister.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:565)
> at org.hibernate.event.def.DefaultInitializeCollectionEventListener.onInitializeCollection(DefaultInitializeCollectionEventListener.java:60)
> at org.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:1716)
> at org.hibernate.collection.AbstractPersistentCollection.forceInitialization(AbstractPersistentCollection.java:454)
> at org.hibernate.engine.StatefulPersistenceContext.initializeNonLazyCollections(StatefulPersistenceContext.java:755)
> at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:229)
> at org.hibernate.loader.Loader.doList(Loader.java:2211)
> at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2095)
> at org.hibernate.loader.Loader.list(Loader.java:2090)
> at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:388)
> at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338)
> at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172)
> at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121)
> at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79)
> at org.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImpl.java:804)
> at org.jboss.test.DynamicTest.testSF(DynamicTest.java:83)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:40)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:90)
> also note that commenting out this 3 lines makes it work:
> Set roles = new HashSet();
> roles.add(dummy);
> lolo.put("roles",roles);
> So I guess it's about resolving roles relationship during obtaing a user object
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