LazyInitializationException even when session is open ----------------------------------------------------- Key: HHH-5728 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-5728 Project: Hibernate Core Issue Type: Bug Components: core Affects Versions: 3.2.6 Environment: Hibernate 3.2.6 GA Database: mysql-5.1.36 Jdbc driver: mysql connector java 5.1.10 OS: Win XP Pro Reporter: Pushkar Prakash Attachments: test case.zip The test case implements a Many-One association (Employee - Department). After loading a department I access the employees collections. When I call the Set.iterator() method on the employees collection implemented as Set Hibernate throws LazyInitializationException. This happens whether I specify the inverse="true" on the <set> element in the mapping file or not. Here is the complete stack trace: Hibernate: select department0_.departmentId as departme1_1_, department0_.location as location1_ from Department department0_ where department0_.departmentId=1 Employees in department: 1 Hibernate: select employees0_.deptId as deptId1_, employees0_.emp_id as emp1_1_, employees0_.emp_id as emp1_0_0_, employees0_.fname as fname0_0_, employees0_.lname as lname0_0_, employees0_.phone as phone0_0_, employees0_.deptId as deptId0_0_ from employee employees0_ where employees0_.deptId=? Nov 11, 2010 9:18:29 AM org.hibernate.LazyInitializationException <init> SEVERE: illegal access to loading collection 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 Department.hashCode(Department.java:43) at Employee.hashCode(Employee.java:55) 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.loading.CollectionLoadContext.endLoadingCollection(CollectionLoadContext.java:240) at org.hibernate.engine.loading.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:222) at org.hibernate.engine.loading.CollectionLoadContext.endLoadingCollections(CollectionLoadContext.java:195) at org.hibernate.loader.Loader.endCollectionLoad(Loader.java:877) at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:865) at org.hibernate.loader.Loader.doQuery(Loader.java:729) at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236) at org.hibernate.loader.Loader.loadCollection(Loader.java:1994) 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:63) 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.iterator(PersistentSet.java:163) at Test3.main(Test3.java:26) ex: org.hibernate.LazyInitializationException: illegal access to loading collection -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://opensource.atlassian.com/projects/hibernate/secure/Administrators.... - For more information on JIRA, see: http://www.atlassian.com/software/jira