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Author Message
chaseja
 Post subject: Failed to lazily initialize a collection
PostPosted: Thu Sep 02, 2004 11:44 am 
Newbie

Joined: Fri Oct 03, 2003 8:44 am
Posts: 11
I'm getting a lazy initialization exception on a many to many relationship, however, I'm not marking any collections as lazy, so I can't understand why I'd get this!!


Hibernate version: 2.1.6

Database Schema
QHTACCTS
-------------
user_id (pk) - String

OS_MEMBERSHIP
--------------------
user_id (pk) - String
groupname (pk) - String

OS_GROUP
-------------
groupname (pk) - String


Mapping documents:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >

<hibernate-mapping>

<class name="supportutils.Group" table="OS_GROUP">
<id name="id" column="groupname" type="java.lang.String">
<generator class="assigned" />
</id>

<set name="accounts" table="OS_MEMBERSHIP" inverse="true">
<key column="groupname" />
<many-to-many class="supportutils.Account" column="user_id" />
</set>

</class>
</hibernate-mapping>
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 2.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >

<hibernate-mapping>

<class name="supportutils.Account" table="qhtaccts">

<id name="id" column="user_id" type="java.lang.String">
<generator class="assigned" />
</id>

<!-- <property name="loginName" column="user_id" type="java.lang.String" />-->

<property name="emailAddress" column="email" type="java.lang.String" />
<property name="password" column="pw" type="java.lang.String" />
<property name="firstName" column="first_name" type="java.lang.String" />
<property name="lastName" column="last_name" type="java.lang.String" />


<set name="groups" table="OS_MEMBERSHIP">
<key column="user_id" />
<many-to-many class="supportutils.Group" column="groupname" />
</set>


</class>
</hibernate-mapping>


Code between sessionFactory.openSession() and session.close(): I'm using Spring v.1.0.2, so...
public List findAll() {
return getHibernateTemplate().find("from Account a");
}

Spring configuration:
<!-- ========== Hibernate SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate.LocalSessionFactoryBean">
<property name="dataSource"><ref bean="dataSource"/></property>
<property name="mappingResources">
<list>
<value>supportutils/dao/hibernate/hbm/Account.hbm.xml</value>
<value>supportutils/dao/hibernate/hbm/Group.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">net.sf.hibernate.dialect.SQLServerDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>

<!-- ==================== DAO's -->
<bean id="accountDao" class="supportutils.dao.hibernate.AccountHibernateDao">
<property name="sessionFactory"><ref bean="sessionFactory"/></property>
</bean>
<bean id="groupDao" class="supportutils.dao.hibernate.GroupHibernateDao">
<property name="sessionFactory"><ref bean="sessionFactory"/></property>
</bean>


Full stack trace of any exception that occurs:
net.sf.hibernate.LazyInitializationException: Failed to lazily initialize a collection
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:201)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:71)
at net.sf.hibernate.collection.Set.hashCode(Set.java:383)
at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:297)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:270)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:200)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:177)
at supportutils.AbstractDomainObject.hashCode(AbstractDomainObject.java:49)
at java.util.HashMap.hash(Unknown Source)
at java.util.HashMap.put(Unknown Source)
at java.util.HashSet.add(Unknown Source)
at java.util.AbstractCollection.addAll(Unknown Source)
at net.sf.hibernate.collection.Set.endRead(Set.java:244)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3082)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3069)
at net.sf.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:320)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:305)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:990)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:965)
at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:83)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3268)
at net.sf.hibernate.collection.PersistentCollection.forceInitialization(PersistentCollection.java:336)
at net.sf.hibernate.impl.SessionImpl.initializeNonLazyCollections(SessionImpl.java:3123)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:138)
at net.sf.hibernate.loader.Loader.doList(Loader.java:1033)
at net.sf.hibernate.loader.Loader.list(Loader.java:1024)
at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:854)
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1544)
at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
at org.springframework.orm.hibernate.HibernateTemplate$17.doInHibernate(HibernateTemplate.java:331)
at org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:150)
at org.springframework.orm.hibernate.HibernateTemplate.executeFind(HibernateTemplate.java:170)
at org.springframework.orm.hibernate.HibernateTemplate.find(HibernateTemplate.java:328)
at supportutils.dao.hibernate.AccountHibernateDao.findAll(AccountHibernateDao.java:44)
at supportutils.dao.hibernate.AccountHibernateDaoTest.testFindAll(AccountHibernateDaoTest.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:421)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:305)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:186)
Caused by: net.sf.hibernate.LazyInitializationException: Failed to lazily initialize a collection
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:201)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:71)
at net.sf.hibernate.collection.Set.hashCode(Set.java:383)
at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:297)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:270)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:200)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:177)
at supportutils.AbstractDomainObject.hashCode(AbstractDomainObject.java:49)
at java.util.HashMap.hash(Unknown Source)
at java.util.HashMap.put(Unknown Source)
at java.util.HashSet.add(Unknown Source)
at java.util.AbstractCollection.addAll(Unknown Source)
at net.sf.hibernate.collection.Set.endRead(Set.java:244)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3082)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3069)
at net.sf.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:320)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:305)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:990)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:965)
at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:83)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3268)
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:195)
... 53 more
Caused by: net.sf.hibernate.LazyInitializationException: cannot access loading collection
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:191)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:71)
at net.sf.hibernate.collection.Set.hashCode(Set.java:383)
at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:297)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:270)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:200)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:177)
at supportutils.AbstractDomainObject.hashCode(AbstractDomainObject.java:49)
at java.util.HashMap.hash(Unknown Source)
at java.util.HashMap.put(Unknown Source)
at java.util.HashSet.add(Unknown Source)
at java.util.AbstractCollection.addAll(Unknown Source)
at net.sf.hibernate.collection.Set.endRead(Set.java:244)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3082)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3069)
at net.sf.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:320)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:305)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:990)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:965)
at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:83)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3268)
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:195)
... 76 more


Name and version of the database you are using: MSSQL Server 2000

Debug level Hibernate log excerpt:
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.type.StringType - returning 'jira-users' as column: groupname__
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.loader.Loader - found row of collection: [supportutils.Group.accounts#jira-users]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - reading row
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.type.StringType - returning 's.wiseman' as column: user_id__
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - loading [supportutils.Account#s.wiseman]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - attempting to resolve [supportutils.Account#s.wiseman]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - resolved object in session cache [supportutils.Account#s.wiseman]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.loader.Loader - done processing result set (630 rows)
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.BatcherImpl - done closing: 0 open PreparedStatements, 0 open ResultSets
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.BatcherImpl - closing statement
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.loader.Loader - total objects hydrated: 0
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - 1 collections were found in result set
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - initializing collection [supportutils.Account.groups#andreawaz]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - checking second-level cache
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - collection not cached
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.BatcherImpl - about to open: 0 open PreparedStatements, 0 open ResultSets
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.SQL - select groups0_.user_id as user_id__, groups0_.groupname as groupname__, group1_.groupname as groupname0_ from OS_MEMBERSHIP groups0_ inner join OS_GROUP group1_ on groups0_.groupname=group1_.groupname where groups0_.user_id=?
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.BatcherImpl - preparing statement
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.type.StringType - binding 'andreawaz' to parameter: 1
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.loader.Loader - result set contains (possibly empty) collection: [supportutils.Account.groups#andreawaz]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - uninitialized collection: initializing
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.loader.Loader - processing result set
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.type.StringType - returning 'jira-users' as column: groupname0_
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.loader.Loader - result row: jira-users
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.type.StringType - returning 'andreawaz' as column: user_id__
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.loader.Loader - found row of collection: [supportutils.Account.groups#andreawaz]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - reading row
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.type.StringType - returning 'jira-users' as column: groupname__
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - loading [supportutils.Group#jira-users]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - attempting to resolve [supportutils.Group#jira-users]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - resolved object in session cache [supportutils.Group#jira-users]
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.loader.Loader - done processing result set (1 rows)
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.BatcherImpl - done closing: 0 open PreparedStatements, 0 open ResultSets
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.BatcherImpl - closing statement
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.loader.Loader - total objects hydrated: 0
02 Sep 2004 11:41:22 : [DEBUG] net.sf.hibernate.impl.SessionImpl - 1 collections were found in result set
02 Sep 2004 11:41:22 : [ERROR] net.sf.hibernate.LazyInitializationException - cannot access loading collection
net.sf.hibernate.LazyInitializationException: cannot access loading collection
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:191)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:71)
at net.sf.hibernate.collection.Set.hashCode(Set.java:383)
at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:297)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:270)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:200)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:177)
at supportutils.AbstractDomainObject.hashCode(AbstractDomainObject.java:49)
at java.util.HashMap.hash(Unknown Source)
at java.util.HashMap.put(Unknown Source)
at java.util.HashSet.add(Unknown Source)
at java.util.AbstractCollection.addAll(Unknown Source)
at net.sf.hibernate.collection.Set.endRead(Set.java:244)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3082)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3069)
at net.sf.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:320)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:305)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:990)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:965)
at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:83)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3268)
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:195)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:71)
at net.sf.hibernate.collection.Set.hashCode(Set.java:383)
at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:297)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:270)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:200)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:177)
at supportutils.AbstractDomainObject.hashCode(AbstractDomainObject.java:49)
at java.util.HashMap.hash(Unknown Source)
at java.util.HashMap.put(Unknown Source)
at java.util.HashSet.add(Unknown Source)
at java.util.AbstractCollection.addAll(Unknown Source)
at net.sf.hibernate.collection.Set.endRead(Set.java:244)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3082)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3069)
at net.sf.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:320)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:305)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:990)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:965)
at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:83)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3268)
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:195)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:71)
at net.sf.hibernate.collection.Set.hashCode(Set.java:383)
at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:297)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:270)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:200)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:177)
at supportutils.AbstractDomainObject.hashCode(AbstractDomainObject.java:49)
at java.util.HashMap.hash(Unknown Source)
at java.util.HashMap.put(Unknown Source)
at java.util.HashSet.add(Unknown Source)
at java.util.AbstractCollection.addAll(Unknown Source)
at net.sf.hibernate.collection.Set.endRead(Set.java:244)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3082)
at net.sf.hibernate.impl.SessionImpl.endLoadingCollections(SessionImpl.java:3069)
at net.sf.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:320)
at net.sf.hibernate.loader.Loader.doQuery(Loader.java:305)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:133)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:990)
at net.sf.hibernate.loader.Loader.loadCollection(Loader.java:965)
at net.sf.hibernate.loader.CollectionLoader.initialize(CollectionLoader.java:83)
at net.sf.hibernate.collection.AbstractCollectionPersister.initialize(AbstractCollectionPersister.java:284)
at net.sf.hibernate.impl.SessionImpl.initializeCollection(SessionImpl.java:3268)
at net.sf.hibernate.collection.PersistentCollection.forceInitialization(PersistentCollection.java:336)
at net.sf.hibernate.impl.SessionImpl.initializeNonLazyCollections(SessionImpl.java:3123)
at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:138)
at net.sf.hibernate.loader.Loader.doList(Loader.java:1033)
at net.sf.hibernate.loader.Loader.list(Loader.java:1024)
at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:854)
at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1544)
at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)
at org.springframework.orm.hibernate.HibernateTemplate$17.doInHibernate(HibernateTemplate.java:331)
at org.springframework.orm.hibernate.HibernateTemplate.execute(HibernateTemplate.java:150)
at org.springframework.orm.hibernate.HibernateTemplate.executeFind(HibernateTemplate.java:170)
at org.springframework.orm.hibernate.HibernateTemplate.find(HibernateTemplate.java:328)
at supportutils.dao.hibernate.AccountHibernateDao.findAll(AccountHibernateDao.java:44)
at supportutils.dao.hibernate.AccountHibernateDaoTest.testFindAll(AccountHibernateDaoTest.java:28)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:421)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:305)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:186)
02 Sep 2004 11:41:22 : [ERROR] net.sf.hibernate.collection.PersistentCollection - Failed to lazily initialize a collection
net.sf.hibernate.LazyInitializationException: cannot access loading collection
at net.sf.hibernate.collection.PersistentCollection.initialize(PersistentCollection.java:191)
at net.sf.hibernate.collection.PersistentCollection.read(PersistentCollection.java:71)
at net.sf.hibernate.collection.Set.hashCode(Set.java:383)
at org.apache.commons.lang.builder.HashCodeBuilder.append(HashCodeBuilder.java:297)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:270)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:200)
at org.apache.commons.lang.builder.HashCodeBuilder.reflectionHashCode(HashCodeBuilder.java:177)
at supportutils.AbstractDomainObject.hashCode(AbstractDomainObject.java:49)
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anthony
 Post subject:
PostPosted: Thu Sep 02, 2004 12:21 pm 
Hibernate Team
Hibernate Team

Joined: Thu Dec 18, 2003 9:55 am
Posts: 1977
Location: France
is your session closed when you're hitting the collection?

_________________
Anthony,
Get value thanks to your skills: http://www.redhat.com/certification

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 Profile  
 
duggant
 Post subject:
PostPosted: Thu Sep 02, 2004 12:51 pm 
Beginner
Beginner

Joined: Mon May 03, 2004 1:25 pm
Posts: 31
I'm pretty sure that Collections default to lazy loading. If you don't want lazy loading you have to specify lazy="false"
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chaseja
 Post subject:
PostPosted: Thu Sep 02, 2004 1:16 pm 
Newbie

Joined: Fri Oct 03, 2003 8:44 am
Posts: 11
duggant wrote:
I'm pretty sure that Collections default to lazy loading. If you don't want lazy loading you have to specify lazy="false"


They default to lazy="false". But I added that to both ends of the relationship just for fun, and still no good.
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chaseja
 Post subject:
PostPosted: Thu Sep 02, 2004 1:18 pm 
Newbie

Joined: Fri Oct 03, 2003 8:44 am
Posts: 11
anthony wrote:
is your session closed when you're hitting the collection?


Yes, the session is already closed:

As an example:
public void testFindAll() {
assertEquals(665, accountDao.findAll().size());
}

...throws the exception in question.
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anthony
 Post subject:
PostPosted: Thu Sep 02, 2004 2:09 pm 
Hibernate Team
Hibernate Team

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Location: France
from Account a join fetch a.groups

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Anthony,
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chaseja
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PostPosted: Thu Sep 02, 2004 2:33 pm 
Newbie

Joined: Fri Oct 03, 2003 8:44 am
Posts: 11
Thanks for your help. I'm a moron - sorry for wasting your time:). Actually, it turns out that I have all my Hibernate persisted classes extending a class I call AbstractDomainObject, which uses Commons Lang to implement hashcode() as follows:

public int hashCode() {
// uses every property of the persistent class to calc. hashcode
return HashCodeBuilder.reflectionHashCode(this);
}

Once I got rid of this, and simply used the ID of the class to help generate the hashcode, my troubles disappeared.

Guess that goes to show me I shouldn't implement more than I really need to!!

Sorry for being dumb:D.

Might this be one for the FAQ's?

Jon
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anthony
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PostPosted: Thu Sep 02, 2004 3:35 pm 
Hibernate Team
Hibernate Team

Joined: Thu Dec 18, 2003 9:55 am
Posts: 1977
Location: France
search for equals & hashcode on the wiki

there are limitations using id to implementent these methods, you should better use business key

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